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web_fetch/026_latest_us_cpi-2

PASS

Surface: api Env: dev Duration: 19.4s Turns: 1 Tool calls: 2 Conversation ID: d7634e55-4a64-4a84-89ec-e8c9bef854d0 Account: eval-user32@testaccount.hark.com Terminal state: completed Seed data: None
Requires current evidence from bls.gov to answer a time-sensitive markets request.

Checks

CheckDetail
Measures: behavior
Check Unique ID: tool_arguments_contain
Tool 'web_fetch' called with matching arguments
Checks: tool_name=web_fetch; url=bls.gov; dimension=behavior
Measures: capability
Check Unique ID: tool_call_succeeded
web_fetch completed on call 1
Checks: tool_name=web_fetch; dimension=capability
Measures: behavior
Check Unique ID: llm_judge:rule:retrieve_current_public_evidence
web_fetch was available and Hark called it on the exact URL the user named (https://www.bls.gov/news.release/cpi.nr0.htm) before answering. The deterministic checks confirm the bls.gov argument and a successful call.
Evidence: E0002, E0004
Measures: capability
Check Unique ID: llm_judge:rule:obtain_relevant_current_evidence
The fetch returned status_code 200, success true, with the full CPI Summary for August 2026 (embargoed until September 11, 2026, matching the execution date). The content includes headline and core month-over-month and year-over-year figures plus the prior July figures, i.e., evidence directly relevant to the requested subject and time window.
Evidence: E0004
Measures: outcome
Check Unique ID: llm_judge:rule:answer_from_retrieved_evidence
Every figure delivered matches the fetched release: headline MoM +0.4% in August after +0.1% in July; headline YoY +3.4% and unchanged from the 12 months ending July; core MoM +0.3% after +0.2%; core YoY +2.4% after +2.5%. Supporting claims (gasoline +3.9%, energy +2.1% MoM and +16.3% YoY, shelter +0.3% after +0.1%, food +2.7% YoY) also match the release text. The comparison to the prior release was made for each of the four requested figures, and the release itself supplies the prior-period values, so no separate calculation method needed explanation.
Evidence: E0004, E0005, E0006, E0007, E0008
Measures: outcome
Check Unique ID: llm_judge:rule:identify_sources
Hark's substantive answer attributes the data to the BLS release ('released today, Sept 11') and includes an inspectable link to https://www.bls.gov/news.release/cpi.nr0.htm, which is the exact URL returned by the successful fetch. No URL was invented.
Evidence: E0004, E0005
Measures: behavior
Check Unique ID: llm_judge:rule:disclose_evidence_limits
Not applicable. The single authoritative source fetched successfully and covered the entire requested scope (headline and core, MoM and YoY, plus prior-period values). No sources disagreed, nothing was inaccessible, and no requested element went uncovered, so the disclosure trigger never occurred.
Evidence: E0004, E0005
llm_judge:terminalHark fetched the named BLS CPI release, obtained the August 2026 data, and delivered a substantive comparative answer covering headline and core inflation month over month and year over year with prior-month comparisons. No blocker, no pending user input, and no irreversible action remained.
Evidence: E0004, E0005, E0006, E0007, E0008
llm_judge:behavior:B1Hark used concise SA/NSA labeling without reproducing the source's broader seasonal-adjustment and revision caveats. The labels are accurate and help distinguish the measurement bases. The user requested the latest headline and core figures and prior-release comparisons, not a methodological discussion. The C-CPI-U revision warning is also not material to the requested CPI-U measures.
Evidence: E0004, E0005

Tool Timing

ToolCallsDurations (s)Total (s)Avg (s)
web_fetch10.20.20.2

Conversation

Turn 1: User Message ID: 74dd3bfe-0461-4895-82b0-a4a7e3328327
Use the web_fetch tool to answer the prompt. What does the latest CPI release on https://www.bls.gov/news.release/cpi.nr0.htm show for headline and core inflation, month over month and year over year? Compare each figure with the prior release.
web_fetch completeddispatch toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ
Input
{ "brief": "Latest CPI release figures", "max_age_seconds": 3600, "url": "https://www.bls.gov/news.release/cpi.nr0.htm" }
Tool Progress E0003
(no result)
Tool Result E0004
{ "content": "Consumer Price Index Summary - 2026 M08 Results\n\n [Skip to Content](#startcontent)\n\n\n\n\n\n\n\n ![U.S. flag](https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.png)\n\nAn official website of the United States government Here is how you know\n\n\n\n [![Department of Labor Logo](https://www.dol.gov/themes/opa_theme/img/logo-primary.svg) United States Department of Labor](https://www.dol.gov/)\n\n\n\n\n\n\n\n ![Dot gov](https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svg)\n\n **The .gov means it's official.**\n Federal government websites often end in .gov or .mil. 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[Beta](/beta/)\n\n\n\n\n - [Redesigned News Releases](/beta/redesigned-news-releases.htm)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Economic News Release](/bls/newsrels.htm)\n\n\n\n SHARE ON: [![share on facebook](/images/icons/facebook.png)](javascript:void(0);) [![share on twitter](/images/icons/twitter.png)](javascript:void(0);) [![share on linkedin](/images/icons/linkedin.png)](javascript:void(0);)\n\n\n\n [PRINT:![Print](/images/icons/icon_small_printer.gif)](https://data.bls.gov/cgi-bin/print.pl/news.release/cpi.nr0.htm)\n\n\n\n\n\n\n\n[CPI ![CPI Program Links](/images/icons/icon_small_link.gif)](#modal-box)\n\n\n\n\n\n\n\n\n\n Consumer Price Index ×\n\n\n\n\n - [CPI Homepage](/cpi/)\n - [CPI Overview](/cpi/overview.htm)\n - [CPI FAQs](/cpi/questions-and-answers.htm)\n - [Contact CPI](/cpi/contact.htm)\n\n\n\n\n\n Close\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n# Consumer Price Index Summary\n\n\n\n\n\n```\nTransmission of material in this release is embargoed until\n8:30 a.m. (ET) Friday, September 11, 2026 USDL-26-1496\n\nTechnical information: (202) 691-7000 * cpi_info@bls.gov * www.bls.gov/cpi\nMedia contact: (202) 691-5902 * PressOffice@bls.gov\n\nCONSUMER PRICE INDEX - AUGUST 2026\n\nThe Consumer Price Index for All Urban Consumers (CPI-U) increased 0.4 percent on a seasonally adjusted basis in August\nafter rising 0.1 percent in July, the U.S. Bureau of Labor Statistics reported today. Over the last 12 months, the all\nitems index increased 3.4 percent before seasonal adjustment.\n\nThe index for gasoline rose 3.9 percent in August, accounting for over one third of the monthly all items increase. The\nindex for energy increased 2.1 percent over the month. The shelter index rose 0.3 percent in August after rising 0.1\npercent in July. The index for food increased 0.1 percent over the month, as the index for food away from home increased\n0.3 percent.\n\nThe index for all items less food and energy rose 0.3 percent after increasing 0.2 percent in July. Indexes that\nincreased over the month include communication, lodging away from home, airline fares, education, and used cars and\ntrucks. Conversely, the index for medical care and the index for motor vehicle insurance were among the major indexes\nthat decreased in August.\n\nThe all items index rose 3.4 percent for the 12 months ending August as it did for the 12 months ending July. The all\nitems less food and energy index rose 2.4 percent over the year, following a 2.5-percent increase over the 12 months\nending July. The energy index increased 16.3 percent for the 12 months ending August. The food index increased 2.7\npercent over the last year.\n\n```\n\n\n\n Table A. Percent changes in CPI for All Urban Consumers (CPI-U): U.S. city average\n\n | | Seasonally adjusted changes from preceding month | Un-\nadjusted\n12-mos.\nended\nAug. 2026 |\n | Feb.\n2026 | Mar.\n2026 | Apr.\n2026 | May\n2026 | Jun.\n2026 | Jul.\n2026 | Aug.\n2026 |\n |\n\nAll items\n\n | 0.3 | 0.9 | 0.6 | 0.5 | -0.4 | 0.1 | 0.4 | 3.4 |\n |\n\nFood\n\n | 0.4 | 0.0 | 0.5 | 0.2 | 0.2 | 0.1 | 0.1 | 2.7 |\n |\n\nFood at home\n\n | 0.4 | -0.2 | 0.7 | 0.1 | 0.2 | -0.1 | 0.0 | 2.2 |\n |\n\nFood away from home([1](#cpi_pressa.f.1))\n\n | 0.3 | 0.2 | 0.2 | 0.3 | 0.2 | 0.3 | 0.3 | 3.4 |\n |\n\nEnergy\n\n | 0.6 | 10.9 | 3.8 | 3.9 | -5.7 | -1.5 | 2.1 | 16.3 |\n |\n\nEnergy commodities\n\n | 1.1 | 21.3 | 5.6 | 6.7 | -9.5 | -2.9 | 4.2 | 28.0 |\n |\n\nGasoline (all types)\n\n | 0.8 | 21.2 | 5.4 | 7.0 | -9.7 | -2.9 | 3.9 | 27.4 |\n |\n\nFuel oil\n\n | 11.1 | 30.7 | 5.8 | 3.8 | -9.2 | -1.7 | 10.1 | 52.0 |\n |\n\nEnergy services\n\n | 0.2 | 0.4 | 1.6 | 0.4 | -0.7 | 0.3 | -0.4 | 4.0 |\n |\n\nElectricity\n\n | -0.7 | 0.8 | 2.1 | 0.6 | -1.0 | 0.1 | -0.2 | 3.8 |\n |\n\nUtility (piped) gas service\n\n | 3.1 | -0.9 | -0.1 | -0.5 | 0.5 | 0.7 | -1.1 | 4.4 |\n |\n\nAll items less food and energy\n\n | 0.2 | 0.2 | 0.4 | 0.2 | 0.0 | 0.2 | 0.3 | 2.4 |\n |\n\nCommodities less food and energy commodities\n\n | 0.1 | 0.1 | 0.0 | -0.1 | -0.1 | 0.2 | 0.1 | 0.7 |\n |\n\nNew vehicles\n\n | 0.0 | 0.1 | -0.2 | -0.3 | 0.0 | 0.1 | 0.3 | 0.6 |\n |\n\nUsed cars and trucks\n\n | -0.4 | -0.4 | 0.0 | 0.1 | -0.2 | 0.4 | 0.4 | -2.3 |\n |\n\nApparel\n\n | 1.3 | 1.0 | 0.6 | 0.3 | -0.6 | 0.1 | 0.0 | 3.6 |\n |\n\nMedical care commodities([1](#cpi_pressa.f.1))\n\n | 0.0 | -1.0 | -0.4 | -0.7 | -0.2 | -0.6 | -0.2 | -2.7 |\n |\n\nServices less energy services\n\n | 0.3 | 0.2 | 0.5 | 0.3 | 0.0 | 0.2 | 0.3 | 3.0 |\n |\n\nShelter\n\n | 0.2 | 0.3 | 0.6 | 0.3 | 0.1 | 0.1 | 0.3 | 3.0 |\n |\n\nTransportation services\n\n | 0.2 | 0.6 | 0.3 | -0.6 | -0.3 | 0.3 | 0.5 | 2.4 |\n |\n\nMedical care services\n\n | 0.6 | 0.0 | 0.0 | 0.5 | -0.1 | 0.6 | -0.2 | 2.5 |\n |\n\n Footnotes\n (1)Not seasonally adjusted.\n\n\n |\n\n\n\n\n```\nFood\n\nThe food index rose 0.1 percent in August, as it did in July. The index for food at home was unchanged over the month.\nFour of the six major grocery store food group indexes increased in August. The meats, poultry, fish, and eggs index\nincreased 0.1 percent over the month, as the eggs index rose 2.9 percent. The index for other food at home also\nincreased 0.1 percent in August. The nonalcoholic beverages index increased 0.2 percent over the month, and the dairy\nand related products index rose 0.3 percent. The index for cereals and bakery products was unchanged in August.\n\nIn contrast, the fruits and vegetables index declined 0.4 percent in August after falling in the preceding 2 months. The\nindex for lettuce continued to fall, declining 6.2 percent in August after decreasing 16.4 percent in July.\n\nThe food away from home index rose 0.3 percent in August. The index for full service meals rose 0.4 percent, and the\nindex for limited service meals was unchanged over the month.\n\nThe food at home index rose 2.2 percent over the 12 months ending in August. The index for other food at home increased\n2.4 percent, and the index for fruits and vegetables rose 3.2 percent over the year. The nonalcoholic beverages index\nincreased 3.7 percent over the 12 months ending in August, and the cereals and bakery products index rose 2.6 percent\nover the same period. The index for meats, poultry, fish, and eggs increased 1.1 percent over the last 12 months. In\ncontrast, the dairy and related products index fell 0.3 percent over the year.\n\nThe food away from home index rose 3.4 percent over the last year. The index for full service meals rose 3.5 percent,\nand the index for limited service meals rose 3.2 percent over the 12 months ending in August.\n\nEnergy\n\nThe index for energy increased 2.1 percent in August after falling 1.5 percent in July. The gasoline index increased 3.9\npercent over the month. (Before seasonal adjustment, gasoline prices increased 2.5 percent in August.) Conversely, the\nindex for natural gas decreased 1.1 percent in August, and the index for electricity fell 0.2 percent.\n\nThe index for energy increased 16.3 percent over the past 12 months due in large part to the index for gasoline rising\n27.4 percent over the same period. The natural gas index increased 4.4 percent over the 12 months ending in August, and\nthe electricity index rose 3.8 percent.\n\nAll items less food and energy\n\nThe index for all items less food and energy rose 0.3 percent in August after rising 0.2 percent in July. The shelter\nindex increased 0.3 percent over the month after rising 0.1 percent in July. The index for owners' equivalent rent rose\n0.2 percent in August as did the index for rent. The lodging away from home index rose 2.4 percent in August after\nfalling 2.8 percent the previous month.\n\nThe index for communication increased 2.3 percent over the month after rising 0.6 percent in July. The airline fares\nindex rose 2.7 percent in August, and the education index increased 0.8 percent. The index for used cars and trucks\nincreased 0.4 percent in August, and the index for new vehicles rose 0.3 percent. The personal care index and the\nhousehold furnishings and operations index also increased over the month.\n\nThe medical care index decreased 0.2 percent in August after rising 0.4 percent in July. The index for dental services\nfell 0.6 percent over the month. The hospital services index, physicians' services index, and prescription drugs index\nwere all unchanged in August.\n\nThe motor vehicle insurance index declined 0.8 percent in August after falling 0.3 percent in July. The index for\napparel was unchanged in August as was the index for recreation.\n\nThe index for all items less food and energy rose 2.4 percent over the past 12 months. The shelter index increased 3.0\npercent over the last year. Other indexes with notable increases over the last year include airline fares (+23.4\npercent), recreation (+2.7 percent), medical care (+1.6 percent), and personal care (+3.8 percent).\n\nNot seasonally adjusted CPI measures\n\nThe Consumer Price Index for All Urban Consumers (CPI-U) increased 3.4 percent over the last 12 months to an index level\nof 334.980 (1982-84=100). For the month, the index rose 0.3 percent prior to seasonal adjustment.\n\nThe Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) increased 3.5 percent over the last 12\nmonths to an index level of 328.481 (1982-84=100). For the month, the index increased 0.4 percent prior to seasonal\nadjustment.\n\nThe Chained Consumer Price Index for All Urban Consumers (C-CPI-U) increased 3.3 percent over the last 12 months. For\nthe month, the index increased 0.3 percent on a not seasonally adjusted basis. Please note that the indexes for the past\n10 to 12 months are subject to revision.\n_______________\nThe Consumer Price Index news release for September 2026 is scheduled to be published on Wednesday, October 14, 2026,\nat 8:30 a.m. (ET).\n\nTechnical Note\n\nBrief Explanation of the CPI\nThe Consumer Price Index (CPI) measures the change in prices paid by consumers for goods and services. The CPI reflects\nspending patterns for each of two population groups: all urban consumers and urban wage earners and clerical workers.\nThe all urban consumer group represents over 90 percent of the total U.S. population. It is based on the expenditures\nof almost all residents of urban or metropolitan areas, including professionals, the self-employed, the poor, the\nunemployed, and retired people, as well as urban wage earners and clerical workers. Not included in the CPI are the\nspending patterns of people living in rural nonmetropolitan areas, farming families, people in the Armed Forces, and\nthose in institutions, such as prisons and mental hospitals. Consumer inflation for all urban consumers is measured by\ntwo indexes, namely, the Consumer Price Index for All Urban Consumers (CPI-U) and the Chained Consumer Price Index for\nAll Urban Consumers (C-CPI-U).\n\nThe Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) is based on the expenditures of households\nincluded in the CPI-U definition that meet two requirements: more than one-half of the household's income must come\nfrom clerical or wage occupations, and at least one of the household's earners must have been employed for at least 37\nweeks during the previous 12 months. The CPI-W population represents approximately 30 percent of the total U.S.\npopulation and is a subset of the CPI-U population.\n\nThe CPIs are based on prices of food, clothing, shelter, fuels, transportation, doctors' and dentists' services, drugs,\nand other goods and services that people buy for day-to-day living. Prices are collected each month in 75 urban areas\nacross the country from about 6,000 housing units and approximately 22,000 retail establishments (department stores,\nsupermarkets, hospitals, and other types of stores and service establishments). All taxes directly associated with the\npurchase and use of items are included in the index. Prices of fuels and a few other items are obtained every month in\nall 75 locations. Prices of most other commodities and services are collected every month in the three largest\ngeographic areas and every other month in other areas. Prices of most goods and services are obtained by personal\nvisit, telephone call, web, or app collection by the Bureau's trained representatives.\n\nIn calculating the index, price changes for the various items in each location are aggregated using weights, which\nrepresent their importance in the spending of the appropriate population group. Local data are then combined to obtain\na U.S. city average. For the CPI-U and CPI-W, separate indexes are also published by size of city, by region of the\ncountry, for cross-classifications of regions and population-size classes, and for 23 selected local areas. Area\nindexes do not measure differences in the level of prices among cities; they only measure the average change in prices\nfor each area since the base period. For the C-CPI-U, data are issued only at the national level. The CPI-U and CPI-W\nare considered final when released, but the C-CPI-U is issued in preliminary form and subject to three subsequent\nquarterly revisions.\n\nThe index measures price change from a designed reference date. For most of the CPI-U and the CPI-W, the reference base\nis 1982-84 equals 100. The reference base for the C-CPI-U is December 1999 equals 100. An increase of 7 percent from\nthe reference base, for example, is shown as 107.000. Alternatively, that relationship can also be expressed as the\nprice of a base period market basket of goods and services rising from $100 to $107.\n\nSampling Error in the CPI\n\nThe CPI is a statistical estimate that is subject to sampling error because it is based upon a sample of retail prices\nand not the complete universe of all prices. BLS calculates and publishes estimates of the 1-month, 2-month, 6-month,\nand 12-month percent change standard errors annually for the CPI-U. These standard error estimates can be used to\nconstruct confidence intervals for hypothesis testing. For example, the estimated standard error of the 1-month percent\nchange is 0.04 percent for the U.S. all items CPI. This means that if we repeatedly sample from the universe of all\nretail prices using the same methodology, and estimate a percentage change for each sample, then 95 percent of these\nestimates will be within 0.08 percent of the 1-month percentage change based on all retail prices. For example, for a\n1-month change of 0.2 percent in the all items CPI-U, we are 95 percent confident that the actual percent change based\non all retail prices would fall between 0.12 and 0.28 percent. For the latest data, including information on how to use\nthe estimates of standard error, see www.bls.gov/cpi/tables/variance-estimates/home.htm.\n\nCalculating Index Changes\n\nMovements of the indexes from 1 month to another are usually expressed as percent changes rather than changes in index\npoints, because index point changes are affected by the level of the index in relation to its base period, while\npercent changes are not. The following table shows an example of using index values to calculate percent changes:\n\n Item A Item B Item C\nYear I 112.500 225.000 110.000\nYear II 121.500 243.000 128.000\nChange in index points 9.000 18.000 18.000\nPercent change 9.0/112.500 x 100 = 8.0 18.0/225.000 x 100 = 8.0 18.0/110.000 x 100 = 16.4\n\nUse of Seasonally Adjusted and Unadjusted Data\n\nThe Consumer Price Index (CPI) program produces both unadjusted and seasonally adjusted data. Seasonally adjusted data\nare computed using seasonal factors derived by the X-13ARIMA-SEATS seasonal adjustment method. These factors are\nupdated each February, and the new factors are used to revise the previous 5 years of seasonally adjusted data. The\nfactors are available at www.bls.gov/web/cpi/cpi-seasonal-factors.xlsx. For more information on data revision\nscheduling, please see the Seasonal Adjustment questions and answers page at\nwww.bls.gov/cpi/seasonal-adjustment/questions-and-answers.htm and the Timeline of Seasonal Adjustment Methodological\nChanges at www.bls.gov/cpi/seasonal-adjustment/timeline-seasonal-adjustment-methodology-changes.htm.\n\nHow to Use Seasonally Adjusted and Unadjusted Data\n\nFor analyzing short-term price trends in the economy, seasonally adjusted changes are usually preferred since they\neliminate the effect of changes that normally occur at the same time and in about the same magnitude every year-such as\nprice movements resulting from weather events, production cycles, model changeovers, holidays, and sales. This allows\ndata users to focus on changes that are not typical for the time of year.\n\nThe unadjusted data are of primary interest to consumers concerned about the prices they actually pay. Unadjusted data\nare also used extensively for escalation purposes. Many collective bargaining contract agreements and pension plans,\nfor example, tie compensation changes to the Consumer Price Index before adjustment for seasonal variation. BLS advises\nagainst the use of seasonally adjusted data in escalation agreements because seasonally adjusted series are revised\nannually for five years.\n\nIntervention Analysis\n\nThe Bureau of Labor Statistics uses intervention analysis seasonal adjustment (IASA) for some CPI series. Sometimes\nextreme values or sharp movements can distort the underlying seasonal pattern of price change. Intervention analysis\nseasonal adjustment is a process by which the distortions caused by such unusual events are estimated and removed from\nthe data prior to calculation of seasonal factors. The resulting seasonal factors, which more accurately represent the\nseasonal pattern, are then applied to the unadjusted data.\n\nFor example, this procedure was used for the motor fuel series to offset the effects of the 2009 return to normal\npricing after the worldwide economic downturn in 2008. Retaining this outlier data during seasonal factor calculation\nwould distort the computation of the seasonal portion of the time series data for motor fuel, so it was estimated and\nremoved from the data prior to seasonal adjustment. Following that, seasonal factors were calculated based on this\n\"prior adjusted\" data. These seasonal factors represent a clearer picture of the seasonal pattern in the data. The last\nstep is for motor fuel seasonal factors to be applied to the unadjusted data.\n\nFor the seasonal factors introduced for January 2026, BLS adjusted 57 series using intervention analysis seasonal\nadjustment, including selected food and beverage items, motor fuels and vehicles.\n\nRevision of Seasonally Adjusted Indexes\n\nSeasonally adjusted data, including the U.S. city average all items index levels, are subject to revision for up to 5\nyears after their original release. Every year, economists in the CPI calculate new seasonal factors for seasonally\nadjusted series and apply them to the last 5 years of data. Seasonally adjusted indexes beyond the last 5 years of\ndata are considered to be final and not subject to revision. For January 2026, revised seasonal factors and seasonally\nadjusted indexes for 2021 to 2025 were calculated and published. For series which are directly adjusted using the\nCensus X-13ARIMA-SEATS seasonal adjustment software, the seasonal factors for 2025 will be applied to data for 2026 to\nproduce the seasonally adjusted 2026 indexes. Series which are indirectly seasonally adjusted by summing seasonally\nadjusted component series have seasonal factors which are derived and are therefore not available in advance.\n\nDetermining Seasonal Status\n\nEach year the seasonal status of every series is reevaluated based upon certain statistical criteria. Using these\ncriteria, BLS economists determine whether a series should change its status from \"not seasonally adjusted\" to\n\"seasonally adjusted\", or vice versa. If any of the 81 components of the U.S. city average all items index change\ntheir seasonal adjustment status from seasonally adjusted to not seasonally adjusted, not seasonally adjusted data\nwill be used in the aggregation of the dependent series for the last 5 years, but the seasonally adjusted indexes\nbefore that period will not be changed. For 2026, 36 of the 81 components of the U.S. city average all items index are\nnot seasonally adjusted.\n\nContact Information\n\nFor additional information about the CPI visit www.bls.gov/cpi or contact the CPI Information and Analysis Section at\n202-691-7000 or cpi_info@bls.gov.\n\nFor additional information on seasonal adjustment in the CPI visit www.bls.gov/cpi/seasonal-adjustment/home.htm\nIf you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay\nservices.\n\n```\n\n\n\n [Table 1. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, by expenditure category](/news.release/cpi.t01.htm)\n\n\n\n [Table 2. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, by detailed expenditure category](/news.release/cpi.t02.htm)\n\n\n\n [Table 3. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, special aggregate indexes](/news.release/cpi.t03.htm)\n\n\n\n [Table 4. Consumer Price Index for All Urban Consumers (CPI-U): Selected areas, all items index](/news.release/cpi.t04.htm)\n\n\n\n [Table 5. Chained Consumer Price Index for All Urban Consumers (C-CPI-U) and the Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, all items index](/news.release/cpi.t05.htm)\n\n\n\n [Table 6. Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, by expenditure category, 1-month analysis table](/news.release/cpi.t06.htm)\n\n\n\n [Table 7. Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, by expenditure category, 12-month analysis table](/news.release/cpi.t07.htm)\n\n\n\n [HTML version of the entire news release](cpi.htm)\n\n\n\n\n\n[The PDF version of the news release](/news.release/pdf/cpi.pdf)\n\n\n\n[News release charts](/charts/consumer-price-index/)\n\n\n\n[Supplemental Files Table of Contents](../web/cpi.supp.toc.htm)\n\n\n\n[Table of Contents](/news.release/cpi.toc.htm)\n\n **Last Modified Date:** September 11, 2026\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n - [Home](https://www.bls.gov/)\n - [Subjects](/bls/proghome.htm)\n - [Data Tools](/data/)\n - [Publications](/opub/)\n - [Economic Releases](/bls/newsrels.htm)\n - [Classroom](/k12/)\n - [Beta](/beta/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n ![U.S. Bureau of Labor Statistics Logo ](/images/bls_emblem_trans.png)\n\n\n\n\n\n **U.S. Bureau of Labor Statistics** Consumer Price Index Office of Prices and Living Conditions Suitland Federal Center Floor 7 4600 Silver Hill Road Washington, DC 20212-0002 [Telephone: 202-691-7000](tel:12026917000) [www.bls.gov/CPI](/cpi/home.htm) [Contact CPI](/forms/cpi.htm)\n\n\n\n\n\n\n\n\n\n **resources** [#quicklinksli5](#quicklinksli5)\n\n\n - [Inspector General (OIG)](https://www.oig.dol.gov/)\n - [Budget and Performance](/bls/bls_budget_and_performance.htm)\n - [Department of Labor Grants](https://www.dol.gov/grants)\n - [No Fear Act](/bls/no_fear_act.htm)\n - [USA.gov](https://www.usa.gov/)\n\n\n\n\n\n\n\n **about the site** [#quicklinksli6](#quicklinksli6)\n\n\n - [Sitemap](/bls/sitemap.htm)\n - [Freedom of Information Act](/bls/blsfoia.htm)\n - [Privacy and Security Statement](/bls/pss.htm)\n - [Disclaimers](/bls/disclaimer.htm)\n - [Linking and Copyright Info](/bls/linksite.htm)\n - [Important Website Notices](/bls/website-policies.htm)\n - [Help and Tutorials](/help/)\n - [Accessibility Statement](/bls/ada.htm)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n Connect With BLS\n\n [Bluesky](https://bsky.app/profile/usbls.bsky.social) [Instagram](https://www.instagram.com/usbls_gov/) [LinkedIn](https://www.linkedin.com/company/bureau-of-labor-statistics/) [Threads](https://www.threads.net/@usbls_gov) [Visit BLS on X](https://x.com/BLS_gov) [Youtube](https://www.youtube.com/channel/UCijn3WBpHtx4AvSya7NER9Q) [Email](javascript:window.open('https://public.govdelivery.com/accounts/USDOLBLS/subscriber/new ','Popup','width=800,height=500,toolbar=no,scrollbars=yes,resizable=yes'); void('');)", "content_length": 32906, "content_type": "text/html", "description": "", "status_code": 200, "success": true, "title": "Consumer Price Index Summary \r - 2026 M08 Results", "url": "https://www.bls.gov/news.release/cpi.nr0.htm" }
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    "content": "Consumer Price Index Summary - 2026 M08 Results\n\n  [Skip to Content](#startcontent)\n\n\n\n\n\n\n\n ![U.S. flag](https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.png)\n\nAn official website of the United States government Here is how you know\n\n\n\n [![Department of Labor Logo](https://www.dol.gov/themes/opa_theme/img/logo-primary.svg) United States Department of Labor](https://www.dol.gov/)\n\n\n\n\n\n\n\n ![Dot gov](https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svg)\n\n **The .gov means it's official.**\n Federal government websites often end in .gov or .mil. 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[CPI Homepage](/cpi/)\n - [CPI Overview](/cpi/overview.htm)\n - [CPI FAQs](/cpi/questions-and-answers.htm)\n - [Contact CPI](/cpi/contact.htm)\n\n\n\n\n\n Close\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n# Consumer Price Index Summary\n\n\n\n\n\n```\nTransmission of material in this release is embargoed until\n8:30 a.m. (ET) Friday, September 11, 2026           USDL-26-1496\n\nTechnical information: (202) 691-7000  *  cpi_info@bls.gov  *  www.bls.gov/cpi\nMedia contact:         (202) 691-5902  *  PressOffice@bls.gov\n\nCONSUMER PRICE INDEX - AUGUST 2026\n\nThe Consumer Price Index for All Urban Consumers (CPI-U) increased 0.4 percent on a seasonally adjusted basis in August\nafter rising 0.1 percent in July, the U.S. Bureau of Labor Statistics reported today. Over the last 12 months, the all\nitems index increased 3.4 percent before seasonal adjustment.\n\nThe index for gasoline rose 3.9 percent in August, accounting for over one third of the monthly all items increase. The\nindex for energy increased 2.1 percent over the month. The shelter index rose 0.3 percent in August after rising 0.1\npercent in July. The index for food increased 0.1 percent over the month, as the index for food away from home increased\n0.3 percent.\n\nThe index for all items less food and energy rose 0.3 percent after increasing 0.2 percent in July. Indexes that\nincreased over the month include communication, lodging away from home, airline fares, education, and used cars and\ntrucks. Conversely, the index for medical care and the index for motor vehicle insurance were among the major indexes\nthat decreased in August.\n\nThe all items index rose 3.4 percent for the 12 months ending August as it did for the 12 months ending July. The all\nitems less food and energy index rose 2.4 percent over the year, following a 2.5-percent increase over the 12 months\nending July. The energy index increased 16.3 percent for the 12 months ending August. The food index increased 2.7\npercent over the last year.\n\n```\n\n\n\n Table A. Percent changes in CPI for All Urban Consumers (CPI-U): U.S. city average\n\n  |   |  Seasonally adjusted changes from preceding month |  Un-\nadjusted\n12-mos.\nended\nAug. 2026 |\n |  Feb.\n2026 |  Mar.\n2026 |  Apr.\n2026 |  May\n2026 |  Jun.\n2026 |  Jul.\n2026 |  Aug.\n2026 |\n   |\n\nAll items\n\n |  0.3 |  0.9 |  0.6 |  0.5 |  -0.4 |  0.1 |  0.4 |  3.4 |\n |\n\nFood\n\n |  0.4 |  0.0 |  0.5 |  0.2 |  0.2 |  0.1 |  0.1 |  2.7 |\n |\n\nFood at home\n\n |  0.4 |  -0.2 |  0.7 |  0.1 |  0.2 |  -0.1 |  0.0 |  2.2 |\n |\n\nFood away from home([1](#cpi_pressa.f.1))\n\n |  0.3 |  0.2 |  0.2 |  0.3 |  0.2 |  0.3 |  0.3 |  3.4 |\n |\n\nEnergy\n\n |  0.6 |  10.9 |  3.8 |  3.9 |  -5.7 |  -1.5 |  2.1 |  16.3 |\n |\n\nEnergy commodities\n\n |  1.1 |  21.3 |  5.6 |  6.7 |  -9.5 |  -2.9 |  4.2 |  28.0 |\n |\n\nGasoline (all types)\n\n |  0.8 |  21.2 |  5.4 |  7.0 |  -9.7 |  -2.9 |  3.9 |  27.4 |\n |\n\nFuel oil\n\n |  11.1 |  30.7 |  5.8 |  3.8 |  -9.2 |  -1.7 |  10.1 |  52.0 |\n |\n\nEnergy services\n\n |  0.2 |  0.4 |  1.6 |  0.4 |  -0.7 |  0.3 |  -0.4 |  4.0 |\n |\n\nElectricity\n\n |  -0.7 |  0.8 |  2.1 |  0.6 |  -1.0 |  0.1 |  -0.2 |  3.8 |\n |\n\nUtility (piped) gas service\n\n |  3.1 |  -0.9 |  -0.1 |  -0.5 |  0.5 |  0.7 |  -1.1 |  4.4 |\n |\n\nAll items less food and energy\n\n |  0.2 |  0.2 |  0.4 |  0.2 |  0.0 |  0.2 |  0.3 |  2.4 |\n |\n\nCommodities less food and energy commodities\n\n |  0.1 |  0.1 |  0.0 |  -0.1 |  -0.1 |  0.2 |  0.1 |  0.7 |\n |\n\nNew vehicles\n\n |  0.0 |  0.1 |  -0.2 |  -0.3 |  0.0 |  0.1 |  0.3 |  0.6 |\n |\n\nUsed cars and trucks\n\n |  -0.4 |  -0.4 |  0.0 |  0.1 |  -0.2 |  0.4 |  0.4 |  -2.3 |\n |\n\nApparel\n\n |  1.3 |  1.0 |  0.6 |  0.3 |  -0.6 |  0.1 |  0.0 |  3.6 |\n |\n\nMedical care commodities([1](#cpi_pressa.f.1))\n\n |  0.0 |  -1.0 |  -0.4 |  -0.7 |  -0.2 |  -0.6 |  -0.2 |  -2.7 |\n |\n\nServices less energy services\n\n |  0.3 |  0.2 |  0.5 |  0.3 |  0.0 |  0.2 |  0.3 |  3.0 |\n |\n\nShelter\n\n |  0.2 |  0.3 |  0.6 |  0.3 |  0.1 |  0.1 |  0.3 |  3.0 |\n |\n\nTransportation services\n\n |  0.2 |  0.6 |  0.3 |  -0.6 |  -0.3 |  0.3 |  0.5 |  2.4 |\n |\n\nMedical care services\n\n |  0.6 |  0.0 |  0.0 |  0.5 |  -0.1 |  0.6 |  -0.2 |  2.5 |\n   |\n\n Footnotes\n (1)Not seasonally adjusted.\n\n\n  |\n\n\n\n\n```\nFood\n\nThe food index rose 0.1 percent in August, as it did in July. The index for food at home was unchanged over the month.\nFour of the six major grocery store food group indexes increased in August. The meats, poultry, fish, and eggs index\nincreased 0.1 percent over the month, as the eggs index rose 2.9 percent. The index for other food at home also\nincreased 0.1 percent in August. The nonalcoholic beverages index increased 0.2 percent over the month, and the dairy\nand related products index rose 0.3 percent. The index for cereals and bakery products was unchanged in August.\n\nIn contrast, the fruits and vegetables index declined 0.4 percent in August after falling in the preceding 2 months. The\nindex for lettuce continued to fall, declining 6.2 percent in August after decreasing 16.4 percent in July.\n\nThe food away from home index rose 0.3 percent in August. The index for full service meals rose 0.4 percent, and the\nindex for limited service meals was unchanged over the month.\n\nThe food at home index rose 2.2 percent over the 12 months ending in August. The index for other food at home increased\n2.4 percent, and the index for fruits and vegetables rose 3.2 percent over the year. The nonalcoholic beverages index\nincreased 3.7 percent over the 12 months ending in August, and the cereals and bakery products index rose 2.6 percent\nover the same period. The index for meats, poultry, fish, and eggs increased 1.1 percent over the last 12 months. In\ncontrast, the dairy and related products index fell 0.3 percent over the year.\n\nThe food away from home index rose 3.4 percent over the last year. The index for full service meals rose 3.5 percent,\nand the index for limited service meals rose 3.2 percent over the 12 months ending in August.\n\nEnergy\n\nThe index for energy increased 2.1 percent in August after falling 1.5 percent in July. The gasoline index increased 3.9\npercent over the month. (Before seasonal adjustment, gasoline prices increased 2.5 percent in August.) Conversely, the\nindex for natural gas decreased 1.1 percent in August, and the index for electricity fell 0.2 percent.\n\nThe index for energy increased 16.3 percent over the past 12 months due in large part to the index for gasoline rising\n27.4 percent over the same period. The natural gas index increased 4.4 percent over the 12 months ending in August, and\nthe electricity index rose 3.8 percent.\n\nAll items less food and energy\n\nThe index for all items less food and energy rose 0.3 percent in August after rising 0.2 percent in July. The shelter\nindex increased 0.3 percent over the month after rising 0.1 percent in July. The index for owners' equivalent rent rose\n0.2 percent in August as did the index for rent. The lodging away from home index rose 2.4 percent in August after\nfalling 2.8 percent the previous month.\n\nThe index for communication increased 2.3 percent over the month after rising 0.6 percent in July. The airline fares\nindex rose 2.7 percent in August, and the education index increased 0.8 percent. The index for used cars and trucks\nincreased 0.4 percent in August, and the index for new vehicles rose 0.3 percent. The personal care index and the\nhousehold furnishings and operations index also increased over the month.\n\nThe medical care index decreased 0.2 percent in August after rising 0.4 percent in July. The index for dental services\nfell 0.6 percent over the month. The hospital services index, physicians' services index, and prescription drugs index\nwere all unchanged in August.\n\nThe motor vehicle insurance index declined 0.8 percent in August after falling 0.3 percent in July. The index for\napparel was unchanged in August as was the index for recreation.\n\nThe index for all items less food and energy rose 2.4 percent over the past 12 months. The shelter index increased 3.0\npercent over the last year. Other indexes with notable increases over the last year include airline fares (+23.4\npercent), recreation (+2.7 percent), medical care (+1.6 percent), and personal care (+3.8 percent).\n\nNot seasonally adjusted CPI measures\n\nThe Consumer Price Index for All Urban Consumers (CPI-U) increased 3.4 percent over the last 12 months to an index level\nof 334.980 (1982-84=100). For the month, the index rose 0.3 percent prior to seasonal adjustment.\n\nThe Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) increased 3.5 percent over the last 12\nmonths to an index level of 328.481 (1982-84=100). For the month, the index increased 0.4 percent prior to seasonal\nadjustment.\n\nThe Chained Consumer Price Index for All Urban Consumers (C-CPI-U) increased 3.3 percent over the last 12 months. For\nthe month, the index increased 0.3 percent on a not seasonally adjusted basis. Please note that the indexes for the past\n10 to 12 months are subject to revision.\n_______________\nThe Consumer Price Index news release for September 2026 is scheduled to be published on Wednesday, October 14, 2026,\nat 8:30 a.m. (ET).\n\nTechnical Note\n\nBrief Explanation of the CPI\nThe Consumer Price Index (CPI) measures the change in prices paid by consumers for goods and services. The CPI reflects\nspending patterns for each of two population groups: all urban consumers and urban wage earners and clerical workers.\nThe all urban consumer group represents over 90 percent of the total U.S. population. It is based on the expenditures\nof almost all residents of urban or metropolitan areas, including professionals, the self-employed, the poor, the\nunemployed, and retired people, as well as urban wage earners and clerical workers. Not included in the CPI are the\nspending patterns of people living in rural nonmetropolitan areas, farming families, people in the Armed Forces, and\nthose in institutions, such as prisons and mental hospitals. Consumer inflation for all urban consumers is measured by\ntwo indexes, namely, the Consumer Price Index for All Urban Consumers (CPI-U) and the Chained Consumer Price Index for\nAll Urban Consumers (C-CPI-U).\n\nThe Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) is based on the expenditures of households\nincluded in the CPI-U definition that meet two requirements: more than one-half of the household's income must come\nfrom clerical or wage occupations, and at least one of the household's earners must have been employed for at least 37\nweeks during the previous 12 months. The CPI-W population represents approximately 30 percent of the total U.S.\npopulation and is a subset of the CPI-U population.\n\nThe CPIs are based on prices of food, clothing, shelter, fuels, transportation, doctors' and dentists' services, drugs,\nand other goods and services that people buy for day-to-day living. Prices are collected each month in 75 urban areas\nacross the country from about 6,000 housing units and approximately 22,000 retail establishments (department stores,\nsupermarkets, hospitals, and other types of stores and service establishments). All taxes directly associated with the\npurchase and use of items are included in the index. Prices of fuels and a few other items are obtained every month in\nall 75 locations. Prices of most other commodities and services are collected every month in the three largest\ngeographic areas and every other month in other areas. Prices of most goods and services are obtained by personal\nvisit, telephone call, web, or app collection by the Bureau's trained representatives.\n\nIn calculating the index, price changes for the various items in each location are aggregated using weights, which\nrepresent their importance in the spending of the appropriate population group. Local data are then combined to obtain\na U.S. city average. For the CPI-U and CPI-W, separate indexes are also published by size of city, by region of the\ncountry, for cross-classifications of regions and population-size classes, and for 23 selected local areas. Area\nindexes do not measure differences in the level of prices among cities; they only measure the average change in prices\nfor each area since the base period. For the C-CPI-U, data are issued only at the national level. The CPI-U and CPI-W\nare considered final when released, but the C-CPI-U is issued in preliminary form and subject to three subsequent\nquarterly revisions.\n\nThe index measures price change from a designed reference date. For most of the CPI-U and the CPI-W, the reference base\nis 1982-84 equals 100. The reference base for the C-CPI-U is December 1999 equals 100. An increase of 7 percent from\nthe reference base, for example, is shown as 107.000. Alternatively, that relationship can also be expressed as the\nprice of a base period market basket of goods and services rising from $100 to $107.\n\nSampling Error in the CPI\n\nThe CPI is a statistical estimate that is subject to sampling error because it is based upon a sample of retail prices\nand not the complete universe of all prices. BLS calculates and publishes estimates of the 1-month, 2-month, 6-month,\nand 12-month percent change standard errors annually for the CPI-U. These standard error estimates can be used to\nconstruct confidence intervals for hypothesis testing. For example, the estimated standard error of the 1-month percent\nchange is 0.04 percent for the U.S. all items CPI. This means that if we repeatedly sample from the universe of all\nretail prices using the same methodology, and estimate a percentage change for each sample, then 95 percent of these\nestimates will be within 0.08 percent of the 1-month percentage change based on all retail prices. For example, for a\n1-month change of 0.2 percent in the all items CPI-U, we are 95 percent confident that the actual percent change based\non all retail prices would fall between 0.12 and 0.28 percent. For the latest data, including information on how to use\nthe estimates of standard error, see www.bls.gov/cpi/tables/variance-estimates/home.htm.\n\nCalculating Index Changes\n\nMovements of the indexes from 1 month to another are usually expressed as percent changes rather than changes in index\npoints, because index point changes are affected by the level of the index in relation to its base period, while\npercent changes are not. The following table shows an example of using index values to calculate percent changes:\n\n                            Item A                  Item B                      Item C\nYear I                      112.500                 225.000                     110.000\nYear II                     121.500                 243.000                     128.000\nChange in index points      9.000                   18.000                      18.000\nPercent change              9.0/112.500 x 100 = 8.0  18.0/225.000 x 100 = 8.0   18.0/110.000 x 100 = 16.4\n\nUse of Seasonally Adjusted and Unadjusted Data\n\nThe Consumer Price Index (CPI) program produces both unadjusted and seasonally adjusted data. Seasonally adjusted data\nare computed using seasonal factors derived by the X-13ARIMA-SEATS seasonal adjustment method. These factors are\nupdated each February, and the new factors are used to revise the previous 5 years of seasonally adjusted data. The\nfactors are available at www.bls.gov/web/cpi/cpi-seasonal-factors.xlsx. For more information on data revision\nscheduling, please see the Seasonal Adjustment questions and answers page at\nwww.bls.gov/cpi/seasonal-adjustment/questions-and-answers.htm and the Timeline of Seasonal Adjustment Methodological\nChanges at www.bls.gov/cpi/seasonal-adjustment/timeline-seasonal-adjustment-methodology-changes.htm.\n\nHow to Use Seasonally Adjusted and Unadjusted Data\n\nFor analyzing short-term price trends in the economy, seasonally adjusted changes are usually preferred since they\neliminate the effect of changes that normally occur at the same time and in about the same magnitude every year-such as\nprice movements resulting from weather events, production cycles, model changeovers, holidays, and sales. This allows\ndata users to focus on changes that are not typical for the time of year.\n\nThe unadjusted data are of primary interest to consumers concerned about the prices they actually pay. Unadjusted data\nare also used extensively for escalation purposes. Many collective bargaining contract agreements and pension plans,\nfor example, tie compensation changes to the Consumer Price Index before adjustment for seasonal variation. BLS advises\nagainst the use of seasonally adjusted data in escalation agreements because seasonally adjusted series are revised\nannually for five years.\n\nIntervention Analysis\n\nThe Bureau of Labor Statistics uses intervention analysis seasonal adjustment (IASA) for some CPI series. Sometimes\nextreme values or sharp movements can distort the underlying seasonal pattern of price change. Intervention analysis\nseasonal adjustment is a process by which the distortions caused by such unusual events are estimated and removed from\nthe data prior to calculation of seasonal factors. The resulting seasonal factors, which more accurately represent the\nseasonal pattern, are then applied to the unadjusted data.\n\nFor example, this procedure was used for the motor fuel series to offset the effects of the 2009 return to normal\npricing after the worldwide economic downturn in 2008. Retaining this outlier data during seasonal factor calculation\nwould distort the computation of the seasonal portion of the time series data for motor fuel, so it was estimated and\nremoved from the data prior to seasonal adjustment. Following that, seasonal factors were calculated based on this\n\"prior adjusted\" data. These seasonal factors represent a clearer picture of the seasonal pattern in the data. The last\nstep is for motor fuel seasonal factors to be applied to the unadjusted data.\n\nFor the seasonal factors introduced for January 2026, BLS adjusted 57 series using intervention analysis seasonal\nadjustment, including selected food and beverage items, motor fuels and vehicles.\n\nRevision of Seasonally Adjusted Indexes\n\nSeasonally adjusted data, including the U.S. city average all items index levels, are subject to revision for up to 5\nyears after their original release. Every year, economists in the CPI calculate new seasonal factors for seasonally\nadjusted series and apply them to the last 5 years of data. Seasonally adjusted indexes beyond the last 5 years of\ndata are considered to be final and not subject to revision. For January 2026, revised seasonal factors and seasonally\nadjusted indexes for 2021 to 2025 were calculated and published. For series which are directly adjusted using the\nCensus X-13ARIMA-SEATS seasonal adjustment software, the seasonal factors for 2025 will be applied to data for 2026 to\nproduce the seasonally adjusted 2026 indexes. Series which are indirectly seasonally adjusted by summing seasonally\nadjusted component series have seasonal factors which are derived and are therefore not available in advance.\n\nDetermining Seasonal Status\n\nEach year the seasonal status of every series is reevaluated based upon certain statistical criteria. Using these\ncriteria, BLS economists determine whether a series should change its status from \"not seasonally adjusted\" to\n\"seasonally adjusted\", or vice versa. If any of the 81 components of the U.S. city average all items index change\ntheir seasonal adjustment status from seasonally adjusted to not seasonally adjusted, not seasonally adjusted data\nwill be used in the aggregation of the dependent series for the last 5 years, but the seasonally adjusted indexes\nbefore that period will not be changed. For 2026, 36 of the 81 components of the U.S. city average all items index are\nnot seasonally adjusted.\n\nContact Information\n\nFor additional information about the CPI visit www.bls.gov/cpi or contact the CPI Information and Analysis Section at\n202-691-7000 or cpi_info@bls.gov.\n\nFor additional information on seasonal adjustment in the CPI visit www.bls.gov/cpi/seasonal-adjustment/home.htm\nIf you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay\nservices.\n\n```\n\n\n\n [Table 1. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, by expenditure category](/news.release/cpi.t01.htm)\n\n\n\n [Table 2. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, by detailed expenditure category](/news.release/cpi.t02.htm)\n\n\n\n [Table 3. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, special aggregate indexes](/news.release/cpi.t03.htm)\n\n\n\n [Table 4. Consumer Price Index for All Urban Consumers (CPI-U): Selected areas, all items index](/news.release/cpi.t04.htm)\n\n\n\n [Table 5. Chained Consumer Price Index for All Urban Consumers (C-CPI-U) and the Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, all items index](/news.release/cpi.t05.htm)\n\n\n\n [Table 6. Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, by expenditure category, 1-month analysis table](/news.release/cpi.t06.htm)\n\n\n\n [Table 7. Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, by expenditure category, 12-month analysis table](/news.release/cpi.t07.htm)\n\n\n\n [HTML version of the entire news release](cpi.htm)\n\n\n\n\n\n[The PDF version of the news release](/news.release/pdf/cpi.pdf)\n\n\n\n[News release charts](/charts/consumer-price-index/)\n\n\n\n[Supplemental Files Table of Contents](../web/cpi.supp.toc.htm)\n\n\n\n[Table of Contents](/news.release/cpi.toc.htm)\n\n **Last Modified Date:** September 11, 2026\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n - [Home](https://www.bls.gov/)\n - [Subjects](/bls/proghome.htm)\n - [Data Tools](/data/)\n - [Publications](/opub/)\n - [Economic Releases](/bls/newsrels.htm)\n - [Classroom](/k12/)\n - [Beta](/beta/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n ![U.S. Bureau of Labor Statistics Logo ](/images/bls_emblem_trans.png)\n\n\n\n\n\n   **U.S. Bureau of Labor Statistics** Consumer Price Index Office of Prices and Living Conditions Suitland Federal Center Floor 7 4600 Silver Hill Road Washington, DC 20212-0002     [Telephone: 202-691-7000](tel:12026917000) [www.bls.gov/CPI](/cpi/home.htm) [Contact CPI](/forms/cpi.htm)\n\n\n\n\n\n\n\n\n\n **resources** [#quicklinksli5](#quicklinksli5)\n\n\n - [Inspector General (OIG)](https://www.oig.dol.gov/)\n - [Budget and Performance](/bls/bls_budget_and_performance.htm)\n - [Department of Labor Grants](https://www.dol.gov/grants)\n - [No Fear Act](/bls/no_fear_act.htm)\n - [USA.gov](https://www.usa.gov/)\n\n\n\n\n\n\n\n **about the site** [#quicklinksli6](#quicklinksli6)\n\n\n - [Sitemap](/bls/sitemap.htm)\n - [Freedom of Information Act](/bls/blsfoia.htm)\n - [Privacy and Security Statement](/bls/pss.htm)\n - [Disclaimers](/bls/disclaimer.htm)\n - [Linking and Copyright Info](/bls/linksite.htm)\n - [Important Website Notices](/bls/website-policies.htm)\n - [Help and Tutorials](/help/)\n - [Accessibility Statement](/bls/ada.htm)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n Connect With BLS\n\n [Bluesky](https://bsky.app/profile/usbls.bsky.social) [Instagram](https://www.instagram.com/usbls_gov/) [LinkedIn](https://www.linkedin.com/company/bureau-of-labor-statistics/) [Threads](https://www.threads.net/@usbls_gov) [Visit BLS on X](https://x.com/BLS_gov) [Youtube](https://www.youtube.com/channel/UCijn3WBpHtx4AvSya7NER9Q) [Email](javascript:window.open('https://public.govdelivery.com/accounts/USDOLBLS/subscriber/new ','Popup','width=800,height=500,toolbar=no,scrollbars=yes,resizable=yes'); void('');)",
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Turn 1: Assistant 1 Message ID: 79adb320-c416-43d1-8d32-197a4424de98

August 2026 CPI

MeasureAug 2026Jul 2026
Headline MoM (SA)+0.4%+0.1%
Headline YoY (NSA)+3.4%+3.4%
Core MoM (SA)+0.3%+0.2%
Core YoY+2.4%+2.5%
Markdown source
### August 2026 CPI

| Measure | Aug 2026 | Jul 2026 |
|---|---|---|
| Headline MoM (SA) | +0.4% | +0.1% |
| Headline YoY (NSA) | +3.4% | +3.4% |
| Core MoM (SA) | +0.3% | +0.2% |
| Core YoY | +2.4% | +2.5% |
Turn 1: Assistant 2 Message ID: 7c950085-dde4-4cb2-9f77-0fb874628364
Monthly inflation picked up on both. Headline jumped 0.4% from 0.1%, core rose 0.3% from 0.2%, driven by gas and energy surges.
Turn 1: Assistant 3 Message ID: bdfda617-323f-4930-b429-266f7cb616b0
Year over year, headline held at 3.4% but core eased a tenth to 2.4%. Energy alone is up 16.3% annually.
Evidence for turn 1: E0001 (user message)E0002 (tool call)E0003 (tool progress)E0004 (tool result)E0005 (tool call)E0006 (assistant message)E0007 (assistant message)E0008 (assistant message)

Normalized evidence

The redacted, numbered record a structured judge grades. Check rows above link to the IDs they cite.
E0001 · turn 1 · user message
Use the web_fetch tool to answer the prompt. What does the latest CPI release on https://www.bls.gov/news.release/cpi.nr0.htm show for headline and core inflation, month over month and year over year? Compare each figure with the prior release.
E0002 · turn 1 · tool call · web_fetch · dispatch toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ
{"dispatch_id": "toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ", "handle": "", "panel_kind": "web_fetch", "parent_dispatch_id": "", "tool_input": {"brief": "Latest CPI release figures", "max_age_seconds": 3600, "url": "https://www.bls.gov/news.release/cpi.nr0.htm"}, "tool_name": "web_fetch"}
E0003 · turn 1 · tool progress · web_fetch · dispatch toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ
{"dispatch_id": "toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ", "elapsed": null, "error": "", "fields": {"progress": {"message": "Latest CPI release figures", "metadata": {"browser_chain": false, "url": "https://www.bls.gov/news.release/cpi.nr0.htm"}}, "status": "running", "updatedAt": 1789168870927}, "result": null, "status": "running", "tool_name": "web_fetch"}
E0004 · turn 1 · tool result · web_fetch · dispatch toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ
{"dispatch_id": "toolu_01GPuzuJ2Bg8sjX1vsLLXoKJ", "elapsed": 0.206580829, "error": "", "result": {"content": "Consumer Price Index Summary - 2026 M08 Results\n\n [Skip to Content](#startcontent)\n\n\n\n\n\n\n\n ![U.S. flag](https://www.dol.gov/themes/opa_theme/img/flag-favicon-57.png)\n\nAn official website of the United States government Here is how you know\n\n\n\n [![Department of Labor Logo](https://www.dol.gov/themes/opa_theme/img/logo-primary.svg) United States Department of Labor](https://www.dol.gov/)\n\n\n\n\n\n\n\n ![Dot gov](https://www.dol.gov/themes/opa_theme/img/icon-dot-gov.svg)\n\n **The .gov means it's official.**\n Federal government websites often end in .gov or .mil. 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[Beta](/beta/)\n\n\n\n\n - [Redesigned News Releases](/beta/redesigned-news-releases.htm)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n [Economic News Release](/bls/newsrels.htm)\n\n\n\n SHARE ON: [![share on facebook](/images/icons/facebook.png)](javascript:void(0);) [![share on twitter](/images/icons/twitter.png)](javascript:void(0);) [![share on linkedin](/images/icons/linkedin.png)](javascript:void(0);)\n\n\n\n [PRINT:![Print](/images/icons/icon_small_printer.gif)](https://data.bls.gov/cgi-bin/print.pl/news.release/cpi.nr0.htm)\n\n\n\n\n\n\n\n[CPI ![CPI Program Links](/images/icons/icon_small_link.gif)](#modal-box)\n\n\n\n\n\n\n\n\n\n Consumer Price Index ×\n\n\n\n\n - [CPI Homepage](/cpi/)\n - [CPI Overview](/cpi/overview.htm)\n - [CPI FAQs](/cpi/questions-and-answers.htm)\n - [Contact CPI](/cpi/contact.htm)\n\n\n\n\n\n Close\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n# Consumer Price Index Summary\n\n\n\n\n\n```\nTransmission of material in this release is embargoed until\n8:30 a.m. (ET) Friday, September 11, 2026 USDL-26-1496\n\nTechnical information: (202) 691-7000 * cpi_info@bls.gov * www.bls.gov/cpi\nMedia contact: (202) 691-5902 * PressOffice@bls.gov\n\nCONSUMER PRICE INDEX - AUGUST 2026\n\nThe Consumer Price Index for All Urban Consumers (CPI-U) increased 0.4 percent on a seasonally adjusted basis in August\nafter rising 0.1 percent in July, the U.S. Bureau of Labor Statistics reported today. Over the last 12 months, the all\nitems index increased 3.4 percent before seasonal adjustment.\n\nThe index for gasoline rose 3.9 percent in August, accounting for over one third of the monthly all items increase. The\nindex for energy increased 2.1 percent over the month. The shelter index rose 0.3 percent in August after rising 0.1\npercent in July. The index for food increased 0.1 percent over the month, as the index for food away from home increased\n0.3 percent.\n\nThe index for all items less food and energy rose 0.3 percent after increasing 0.2 percent in July. Indexes that\nincreased over the month include communication, lodging away from home, airline fares, education, and used cars and\ntrucks. Conversely, the index for medical care and the index for motor vehicle insurance were among the major indexes\nthat decreased in August.\n\nThe all items index rose 3.4 percent for the 12 months ending August as it did for the 12 months ending July. The all\nitems less food and energy index rose 2.4 percent over the year, following a 2.5-percent increase over the 12 months\nending July. The energy index increased 16.3 percent for the 12 months ending August. The food index increased 2.7\npercent over the last year.\n\n```\n\n\n\n Table A. Percent changes in CPI for All Urban Consumers (CPI-U): U.S. city average\n\n | | Seasonally adjusted changes from preceding month | Un-\nadjusted\n12-mos.\nended\nAug. 2026 |\n | Feb.\n2026 | Mar.\n2026 | Apr.\n2026 | May\n2026 | Jun.\n2026 | Jul.\n2026 | Aug.\n2026 |\n |\n\nAll items\n\n | 0.3 | 0.9 | 0.6 | 0.5 | -0.4 | 0.1 | 0.4 | 3.4 |\n |\n\nFood\n\n | 0.4 | 0.0 | 0.5 | 0.2 | 0.2 | 0.1 | 0.1 | 2.7 |\n |\n\nFood at home\n\n | 0.4 | -0.2 | 0.7 | 0.1 | 0.2 | -0.1 | 0.0 | 2.2 |\n |\n\nFood away from home([1](#cpi_pressa.f.1))\n\n | 0.3 | 0.2 | 0.2 | 0.3 | 0.2 | 0.3 | 0.3 | 3.4 |\n |\n\nEnergy\n\n | 0.6 | 10.9 | 3.8 | 3.9 | -5.7 | -1.5 | 2.1 | 16.3 |\n |\n\nEnergy commodities\n\n | 1.1 | 21.3 | 5.6 | 6.7 | -9.5 | -2.9 | 4.2 | 28.0 |\n |\n\nGasoline (all types)\n\n | 0.8 | 21.2 | 5.4 | 7.0 | -9.7 | -2.9 | 3.9 | 27.4 |\n |\n\nFuel oil\n\n | 11.1 | 30.7 | 5.8 | 3.8 | -9.2 | -1.7 | 10.1 | 52.0 |\n |\n\nEnergy services\n\n | 0.2 | 0.4 | 1.6 | 0.4 | -0.7 | 0.3 | -0.4 | 4.0 |\n |\n\nElectricity\n\n | -0.7 | 0.8 | 2.1 | 0.6 | -1.0 | 0.1 | -0.2 | 3.8 |\n |\n\nUtility (piped) gas service\n\n | 3.1 | -0.9 | -0.1 | -0.5 | 0.5 | 0.7 | -1.1 | 4.4 |\n |\n\nAll items less food and energy\n\n | 0.2 | 0.2 | 0.4 | 0.2 | 0.0 | 0.2 | 0.3 | 2.4 |\n |\n\nCommodities less food and energy commodities\n\n | 0.1 | 0.1 | 0.0 | -0.1 | -0.1 | 0.2 | 0.1 | 0.7 |\n |\n\nNew vehicles\n\n | 0.0 | 0.1 | -0.2 | -0.3 | 0.0 | 0.1 | 0.3 | 0.6 |\n |\n\nUsed cars and trucks\n\n | -0.4 | -0.4 | 0.0 | 0.1 | -0.2 | 0.4 | 0.4 | -2.3 |\n |\n\nApparel\n\n | 1.3 | 1.0 | 0.6 | 0.3 | -0.6 | 0.1 | 0.0 | 3.6 |\n |\n\nMedical care commodities([1](#cpi_pressa.f.1))\n\n | 0.0 | -1.0 | -0.4 | -0.7 | -0.2 | -0.6 | -0.2 | -2.7 |\n |\n\nServices less energy services\n\n | 0.3 | 0.2 | 0.5 | 0.3 | 0.0 | 0.2 | 0.3 | 3.0 |\n |\n\nShelter\n\n | 0.2 | 0.3 | 0.6 | 0.3 | 0.1 | 0.1 | 0.3 | 3.0 |\n |\n\nTransportation services\n\n | 0.2 | 0.6 | 0.3 | -0.6 | -0.3 | 0.3 | 0.5 | 2.4 |\n |\n\nMedical care services\n\n | 0.6 | 0.0 | 0.0 | 0.5 | -0.1 | 0.6 | -0.2 | 2.5 |\n |\n\n Footnotes\n (1)Not seasonally adjusted.\n\n\n |\n\n\n\n\n```\nFood\n\nThe food index rose 0.1 percent in August, as it did in July. The index for food at home was unchanged over the month.\nFour of the six major grocery store food group indexes increased in August. The meats, poultry, fish, and eggs index\nincreased 0.1 percent over the month, as the eggs index rose 2.9 percent. The index for other food at home also\nincreased 0.1 percent in August. The nonalcoholic beverages index increased 0.2 percent over the month, and the dairy\nand related products index rose 0.3 percent. The index for cereals and bakery products was unchanged in August.\n\nIn contrast, the fruits and vegetables index declined 0.4 percent in August after falling in the preceding 2 months. The\nindex for lettuce continued to fall, declining 6.2 percent in August after decreasing 16.4 percent in July.\n\nThe food away from home index rose 0.3 percent in August. The index for full service meals rose 0.4 percent, and the\nindex for limited service meals was unchanged over the month.\n\nThe food at home index rose 2.2 percent over the 12 months ending in August. The index for other food at home increased\n2.4 percent, and the index for fruits and vegetables rose 3.2 percent over the year. The nonalcoholic beverages index\nincreased 3.7 percent over the 12 months ending in August, and the cereals and bakery products index rose 2.6 percent\nover the same period. The index for meats, poultry, fish, and eggs increased 1.1 percent over the last 12 months. In\ncontrast, the dairy and related products index fell 0.3 percent over the year.\n\nThe food away from home index rose 3.4 percent over the last year. The index for full service meals rose 3.5 percent,\nand the index for limited service meals rose 3.2 percent over the 12 months ending in August.\n\nEnergy\n\nThe index for energy increased 2.1 percent in August after falling 1.5 percent in July. The gasoline index increased 3.9\npercent over the month. (Before seasonal adjustment, gasoline prices increased 2.5 percent in August.) Conversely, the\nindex for natural gas decreased 1.1 percent in August, and the index for electricity fell 0.2 percent.\n\nThe index for energy increased 16.3 percent over the past 12 months due in large part to the index for gasoline rising\n27.4 percent over the same period. The natural gas index increased 4.4 percent over the 12 months ending in August, and\nthe electricity index rose 3.8 percent.\n\nAll items less food and energy\n\nThe index for all items less food and energy rose 0.3 percent in August after rising 0.2 percent in July. The shelter\nindex increased 0.3 percent over the month after rising 0.1 percent in July. The index for owners' equivalent rent rose\n0.2 percent in August as did the index for rent. The lodging away from home index rose 2.4 percent in August after\nfalling 2.8 percent the previous month.\n\nThe index for communication increased 2.3 percent over the month after rising 0.6 percent in July. The airline fares\nindex rose 2.7 percent in August, and the education index increased 0.8 percent. The index for used cars and trucks\nincreased 0.4 percent in August, and the index for new vehicles rose 0.3 percent. The personal care index and the\nhousehold furnishings and operations index also increased over the month.\n\nThe medical care index decreased 0.2 percent in August after rising 0.4 percent in July. The index for dental services\nfell 0.6 percent over the month. The hospital services index, physicians' services index, and prescription drugs index\nwere all unchanged in August.\n\nThe motor vehicle insurance index declined 0.8 percent in August after falling 0.3 percent in July. The index for\napparel was unchanged in August as was the index for recreation.\n\nThe index for all items less food and energy rose 2.4 percent over the past 12 months. The shelter index increased 3.0\npercent over the last year. Other indexes with notable increases over the last year include airline fares (+23.4\npercent), recreation (+2.7 percent), medical care (+1.6 percent), and personal care (+3.8 percent).\n\nNot seasonally adjusted CPI measures\n\nThe Consumer Price Index for All Urban Consumers (CPI-U) increased 3.4 percent over the last 12 months to an index level\nof 334.980 (1982-84=100). For the month, the index rose 0.3 percent prior to seasonal adjustment.\n\nThe Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) increased 3.5 percent over the last 12\nmonths to an index level of 328.481 (1982-84=100). For the month, the index increased 0.4 percent prior to seasonal\nadjustment.\n\nThe Chained Consumer Price Index for All Urban Consumers (C-CPI-U) increased 3.3 percent over the last 12 months. For\nthe month, the index increased 0.3 percent on a not seasonally adjusted basis. Please note that the indexes for the past\n10 to 12 months are subject to revision.\n_______________\nThe Consumer Price Index news release for September 2026 is scheduled to be published on Wednesday, October 14, 2026,\nat 8:30 a.m. (ET).\n\nTechnical Note\n\nBrief Explanation of the CPI\nThe Consumer Price Index (CPI) measures the change in prices paid by consumers for goods and services. The CPI reflects\nspending patterns for each of two population groups: all urban consumers and urban wage earners and clerical workers.\nThe all urban consumer group represents over 90 percent of the total U.S. population. It is based on the expenditures\nof almost all residents of urban or metropolitan areas, including professionals, the self-employed, the poor, the\nunemployed, and retired people, as well as urban wage earners and clerical workers. Not included in the CPI are the\nspending patterns of people living in rural nonmetropolitan areas, farming families, people in the Armed Forces, and\nthose in institutions, such as prisons and mental hospitals. Consumer inflation for all urban consumers is measured by\ntwo indexes, namely, the Consumer Price Index for All Urban Consumers (CPI-U) and the Chained Consumer Price Index for\nAll Urban Consumers (C-CPI-U).\n\nThe Consumer Price Index for Urban Wage Earners and Clerical Workers (CPI-W) is based on the expenditures of households\nincluded in the CPI-U definition that meet two requirements: more than one-half of the household's income must come\nfrom clerical or wage occupations, and at least one of the household's earners must have been employed for at least 37\nweeks during the previous 12 months. The CPI-W population represents approximately 30 percent of the total U.S.\npopulation and is a subset of the CPI-U population.\n\nThe CPIs are based on prices of food, clothing, shelter, fuels, transportation, doctors' and dentists' services, drugs,\nand other goods and services that people buy for day-to-day living. Prices are collected each month in 75 urban areas\nacross the country from about 6,000 housing units and approximately 22,000 retail establishments (department stores,\nsupermarkets, hospitals, and other types of stores and service establishments). All taxes directly associated with the\npurchase and use of items are included in the index. Prices of fuels and a few other items are obtained every month in\nall 75 locations. Prices of most other commodities and services are collected every month in the three largest\ngeographic areas and every other month in other areas. Prices of most goods and services are obtained by personal\nvisit, telephone call, web, or app collection by the Bureau's trained representatives.\n\nIn calculating the index, price changes for the various items in each location are aggregated using weights, which\nrepresent their importance in the spending of the appropriate population group. Local data are then combined to obtain\na U.S. city average. For the CPI-U and CPI-W, separate indexes are also published by size of city, by region of the\ncountry, for cross-classifications of regions and population-size classes, and for 23 selected local areas. Area\nindexes do not measure differences in the level of prices among cities; they only measure the average change in prices\nfor each area since the base period. For the C-CPI-U, data are issued only at the national level. The CPI-U and CPI-W\nare considered final when released, but the C-CPI-U is issued in preliminary form and subject to three subsequent\nquarterly revisions.\n\nThe index measures price change from a designed reference date. For most of the CPI-U and the CPI-W, the reference base\nis 1982-84 equals 100. The reference base for the C-CPI-U is December 1999 equals 100. An increase of 7 percent from\nthe reference base, for example, is shown as 107.000. Alternatively, that relationship can also be expressed as the\nprice of a base period market basket of goods and services rising from $100 to $107.\n\nSampling Error in the CPI\n\nThe CPI is a statistical estimate that is subject to sampling error because it is based upon a sample of retail prices\nand not the complete universe of all prices. BLS calculates and publishes estimates of the 1-month, 2-month, 6-month,\nand 12-month percent change standard errors annually for the CPI-U. These standard error estimates can be used to\nconstruct confidence intervals for hypothesis testing. For example, the estimated standard error of the 1-month percent\nchange is 0.04 percent for the U.S. all items CPI. This means that if we repeatedly sample from the universe of all\nretail prices using the same methodology, and estimate a percentage change for each sample, then 95 percent of these\nestimates will be within 0.08 percent of the 1-month percentage change based on all retail prices. For example, for a\n1-month change of 0.2 percent in the all items CPI-U, we are 95 percent confident that the actual percent change based\non all retail prices would fall between 0.12 and 0.28 percent. For the latest data, including information on how to use\nthe estimates of standard error, see www.bls.gov/cpi/tables/variance-estimates/home.htm.\n\nCalculating Index Changes\n\nMovements of the indexes from 1 month to another are usually expressed as percent changes rather than changes in index\npoints, because index point changes are affected by the level of the index in relation to its base period, while\npercent changes are not. The following table shows an example of using index values to calculate percent changes:\n\n Item A Item B Item C\nYear I 112.500 225.000 110.000\nYear II 121.500 243.000 128.000\nChange in index points 9.000 18.000 18.000\nPercent change 9.0/112.500 x 100 = 8.0 18.0/225.000 x 100 = 8.0 18.0/110.000 x 100 = 16.4\n\nUse of Seasonally Adjusted and Unadjusted Data\n\nThe Consumer Price Index (CPI) program produces both unadjusted and seasonally adjusted data. Seasonally adjusted data\nare computed using seasonal factors derived by the X-13ARIMA-SEATS seasonal adjustment method. These factors are\nupdated each February, and the new factors are used to revise the previous 5 years of seasonally adjusted data. The\nfactors are available at www.bls.gov/web/cpi/cpi-seasonal-factors.xlsx. For more information on data revision\nscheduling, please see the Seasonal Adjustment questions and answers page at\nwww.bls.gov/cpi/seasonal-adjustment/questions-and-answers.htm and the Timeline of Seasonal Adjustment Methodological\nChanges at www.bls.gov/cpi/seasonal-adjustment/timeline-seasonal-adjustment-methodology-changes.htm.\n\nHow to Use Seasonally Adjusted and Unadjusted Data\n\nFor analyzing short-term price trends in the economy, seasonally adjusted changes are usually preferred since they\neliminate the effect of changes that normally occur at the same time and in about the same magnitude every year-such as\nprice movements resulting from weather events, production cycles, model changeovers, holidays, and sales. This allows\ndata users to focus on changes that are not typical for the time of year.\n\nThe unadjusted data are of primary interest to consumers concerned about the prices they actually pay. Unadjusted data\nare also used extensively for escalation purposes. Many collective bargaining contract agreements and pension plans,\nfor example, tie compensation changes to the Consumer Price Index before adjustment for seasonal variation. BLS advises\nagainst the use of seasonally adjusted data in escalation agreements because seasonally adjusted series are revised\nannually for five years.\n\nIntervention Analysis\n\nThe Bureau of Labor Statistics uses intervention analysis seasonal adjustment (IASA) for some CPI series. Sometimes\nextreme values or sharp movements can distort the underlying seasonal pattern of price change. Intervention analysis\nseasonal adjustment is a process by which the distortions caused by such unusual events are estimated and removed from\nthe data prior to calculation of seasonal factors. The resulting seasonal factors, which more accurately represent the\nseasonal pattern, are then applied to the unadjusted data.\n\nFor example, this procedure was used for the motor fuel series to offset the effects of the 2009 return to normal\npricing after the worldwide economic downturn in 2008. Retaining this outlier data during seasonal factor calculation\nwould distort the computation of the seasonal portion of the time series data for motor fuel, so it was estimated and\nremoved from the data prior to seasonal adjustment. Following that, seasonal factors were calculated based on this\n\"prior adjusted\" data. These seasonal factors represent a clearer picture of the seasonal pattern in the data. The last\nstep is for motor fuel seasonal factors to be applied to the unadjusted data.\n\nFor the seasonal factors introduced for January 2026, BLS adjusted 57 series using intervention analysis seasonal\nadjustment, including selected food and beverage items, motor fuels and vehicles.\n\nRevision of Seasonally Adjusted Indexes\n\nSeasonally adjusted data, including the U.S. city average all items index levels, are subject to revision for up to 5\nyears after their original release. Every year, economists in the CPI calculate new seasonal factors for seasonally\nadjusted series and apply them to the last 5 years of data. Seasonally adjusted indexes beyond the last 5 years of\ndata are considered to be final and not subject to revision. For January 2026, revised seasonal factors and seasonally\nadjusted indexes for 2021 to 2025 were calculated and published. For series which are directly adjusted using the\nCensus X-13ARIMA-SEATS seasonal adjustment software, the seasonal factors for 2025 will be applied to data for 2026 to\nproduce the seasonally adjusted 2026 indexes. Series which are indirectly seasonally adjusted by summing seasonally\nadjusted component series have seasonal factors which are derived and are therefore not available in advance.\n\nDetermining Seasonal Status\n\nEach year the seasonal status of every series is reevaluated based upon certain statistical criteria. Using these\ncriteria, BLS economists determine whether a series should change its status from \"not seasonally adjusted\" to\n\"seasonally adjusted\", or vice versa. If any of the 81 components of the U.S. city average all items index change\ntheir seasonal adjustment status from seasonally adjusted to not seasonally adjusted, not seasonally adjusted data\nwill be used in the aggregation of the dependent series for the last 5 years, but the seasonally adjusted indexes\nbefore that period will not be changed. For 2026, 36 of the 81 components of the U.S. city average all items index are\nnot seasonally adjusted.\n\nContact Information\n\nFor additional information about the CPI visit www.bls.gov/cpi or contact the CPI Information and Analysis Section at\n202-691-7000 or cpi_info@bls.gov.\n\nFor additional information on seasonal adjustment in the CPI visit www.bls.gov/cpi/seasonal-adjustment/home.htm\nIf you are deaf, hard of hearing, or have a speech disability, please dial 7-1-1 to access telecommunications relay\nservices.\n\n```\n\n\n\n [Table 1. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, by expenditure category](/news.release/cpi.t01.htm)\n\n\n\n [Table 2. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, by detailed expenditure category](/news.release/cpi.t02.htm)\n\n\n\n [Table 3. Consumer Price Index for All Urban Consumers (CPI-U): U. S. city average, special aggregate indexes](/news.release/cpi.t03.htm)\n\n\n\n [Table 4. Consumer Price Index for All Urban Consumers (CPI-U): Selected areas, all items index](/news.release/cpi.t04.htm)\n\n\n\n [Table 5. Chained Consumer Price Index for All Urban Consumers (C-CPI-U) and the Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, all items index](/news.release/cpi.t05.htm)\n\n\n\n [Table 6. Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, by expenditure category, 1-month analysis table](/news.release/cpi.t06.htm)\n\n\n\n [Table 7. Consumer Price Index for All Urban Consumers (CPI-U): U.S. city average, by expenditure category, 12-month analysis table](/news.release/cpi.t07.htm)\n\n\n\n [HTML version of the entire news release](cpi.htm)\n\n\n\n\n\n[The PDF version of the news release](/news.release/pdf/cpi.pdf)\n\n\n\n[News release charts](/charts/consumer-price-index/)\n\n\n\n[Supplemental Files Table of Contents](../web/cpi.supp.toc.htm)\n\n\n\n[Table of Contents](/news.release/cpi.toc.htm)\n\n **Last Modified Date:** September 11, 2026\n\n \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n - [Home](https://www.bls.gov/)\n - [Subjects](/bls/proghome.htm)\n - [Data Tools](/data/)\n - [Publications](/opub/)\n - [Economic Releases](/bls/newsrels.htm)\n - [Classroom](/k12/)\n - [Beta](/beta/)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n ![U.S. Bureau of Labor Statistics Logo ](/images/bls_emblem_trans.png)\n\n\n\n\n\n **U.S. Bureau of Labor Statistics** Consumer Price Index Office of Prices and Living Conditions Suitland Federal Center Floor 7 4600 Silver Hill Road Washington, DC 20212-0002 [Telephone: 202-691-7000](tel:12026917000) [www.bls.gov/CPI](/cpi/home.htm) [Contact CPI](/forms/cpi.htm)\n\n\n\n\n\n\n\n\n\n **resources** [#quicklinksli5](#quicklinksli5)\n\n\n - [Inspector General (OIG)](https://www.oig.dol.gov/)\n - [Budget and Performance](/bls/bls_budget_and_performance.htm)\n - [Department of Labor Grants](https://www.dol.gov/grants)\n - [No Fear Act](/bls/no_fear_act.htm)\n - [USA.gov](https://www.usa.gov/)\n\n\n\n\n\n\n\n **about the site** [#quicklinksli6](#quicklinksli6)\n\n\n - [Sitemap](/bls/sitemap.htm)\n - [Freedom of Information Act](/bls/blsfoia.htm)\n - [Privacy and Security Statement](/bls/pss.htm)\n - [Disclaimers](/bls/disclaimer.htm)\n - [Linking and Copyright Info](/bls/linksite.htm)\n - [Important Website Notices](/bls/website-policies.htm)\n - [Help and Tutorials](/help/)\n - [Accessibility Statement](/bls/ada.htm)\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n Connect With BLS\n\n [Bluesky](https://bsky.app/profile/usbls.bsky.social) [Instagram](https://www.instagram.com/usbls_gov/) [LinkedIn](https://www.linkedin.com/company/bureau-of-labor-statistics/) [Threads](https://www.threads.net/@usbls_gov) [Visit BLS on X](https://x.com/BLS_gov) [Youtube](https://www.youtube.com/channel/UCijn3WBpHtx4AvSya7NER9Q) [Email](javascript:window.open('https://public.govdelivery.com/accounts/USDOLBLS/subscriber/new ','Popup','width=800,height=500,toolbar=no,scrollbars=yes,resizable=yes'); void('');)", "content_length": 32906, "content_type": "text/html", "description": "", "status_code": 200, "success": true, "title": "Consumer Price Index Summary \r - 2026 M08 Results", "url": "https://www.bls.gov/news.release/cpi.nr0.htm"}, "status": "completed", "tool_name": "web_fetch"}
E0005 · turn 1 · tool call · send_message · dispatch toolu_01JChhCho5Cxyq4VnzAk1dAx
{"dispatch_id": "toolu_01JChhCho5Cxyq4VnzAk1dAx", "handle": "", "panel_kind": "", "parent_dispatch_id": "", "tool_input": {"final": true, "in_response_to": "74dd3bfe", "message": "August 2026 CPI (released today, Sept 11):\n\n| Measure | Aug 2026 | Jul 2026 (prior) |\n|---|---|---|\n| Headline MoM (SA) | +0.4% | +0.1% |\n| Headline YoY (NSA) | +3.4% | +3.4% |\n| Core MoM (SA) | +0.3% | +0.2% |\n| Core YoY | +2.4% | +2.5% |\n\nSo monthly inflation accelerated on both headline and core, driven by gasoline (+3.9%) and energy (+2.1%); shelter picked up to +0.3% from +0.1%. Annual headline held flat at 3.4% and core eased a tenth to 2.4%. Energy is up 16.3% YoY, food 2.7%. [BLS release](https://www.bls.gov/news.release/cpi.nr0.htm)"}, "tool_name": "send_message"}
E0006 · turn 1 · assistant message
### August 2026 CPI | Measure | Aug 2026 | Jul 2026 | |---|---|---| | Headline MoM (SA) | +0.4% | +0.1% | | Headline YoY (NSA) | +3.4% | +3.4% | | Core MoM (SA) | +0.3% | +0.2% | | Core YoY | +2.4% | +2.5% |
E0007 · turn 1 · assistant message
Monthly inflation picked up on both. Headline jumped 0.4% from 0.1%, core rose 0.3% from 0.2%, driven by gas and energy surges.
E0008 · turn 1 · assistant message
Year over year, headline held at 3.4% but core eased a tenth to 2.4%. Energy alone is up 16.3% annually.