Headline inflation
Updated
Summary
Headline inflation is the 12-month change in a country's all-items consumer price index. It covers everything households buy, including energy and food, which are the most volatile items. Core inflation strips some of those out to show the underlying trend, but each country defines core differently. In the US the Bureau of Labor Statistics (BLS) publishes CPI-U all items; core excludes food and energy. In the UK the Office for National Statistics (ONS) publishes CPI; core excludes energy, food, alcohol and tobacco. In the euro area Eurostat publishes the HICP; core uses the same exclusions as the UK. Japan is a naming trap: its 'core' CPI excludes only fresh food, and the measure that also excludes energy is often called core-core. Most central-bank targets are set on headline measures: the Bank of England targets 2% headline CPI, the ECB 2% headline HICP. The Fed targets 2% on a different index, the PCE price index, not the CPI.
Key numbers
US CPI-U, September 2026: all items / core / energy: 3.7% / 2.6% / 20.4% (as of 2026-10-14). Source: bls.gov
US gasoline CPI, 12 months to September 2026: +34.2% (as of 2026-10-14). Source: bls.gov
UK CPI, September 2026: all items / core / services: 3.5% / 2.8% / 3.7% (as of 2026-10-21). Source: ons.gov.uk
UK motor fuels, 12 months to September 2026: +29.8% (as of 2026-10-21). Source: ons.gov.uk
Euro area HICP, September 2026: all items / core / energy: 3.8% / 2.5% / 18.9% (as of 2026-10-16). Source: ec.europa.eu
Energy contribution to euro area inflation, September 2026: 1.71 percentage points of 3.8% (as of 2026-10-16). Source: ec.europa.eu
Japan CPI, August 2026: all items / ex fresh food / ex fresh food and energy / energy: 1.9% / 1.7% / 1.9% / -0.7% (as of 2026-09-18). Source: stat.go.jp
Tokyo CPI, September 2026 preliminary: all items / energy: 2.7% / -2.0% (as of 2026-10-02). Source: stat.go.jp
FAO Food Price Index, September 2026: 136.0 points (+5.8% year on year) (as of 2026-10-02). Source: fao.org
Bank of England CPI forecast: around 3.75% in 2026 Q4; slightly above 4% in 2027 Q1 (forecast) (as of 2026-09-17). Source: bankofengland.co.uk
Direct energy share of UK August overshoot: 0.7 of 1.1 points (as of 2026-09-17). Source: bankofengland.co.uk
Euro area HICP, February 2026 (pre-shock): 1.9% (energy -3.1%) (as of 2026-04-16). Source: ec.europa.eu
Timeline
2026-10-21 — UK CPI rises to 3.5% in September from 3.1%; core 2.8%; motor fuels up 29.8%. (Source: ons.gov.uk)
2026-10-16 — Eurostat confirms euro area inflation of 3.8% in September; energy 18.9%. (Source: ec.europa.eu)
2026-10-14 — US CPI 3.7% in September, up from 3.4%; energy 20.4%, core 2.6%. (Source: bls.gov)
2026-10-02 — FAO Food Price Index 136.0 in September, up 5.8% on the year. (Source: fao.org)
2026-10-02 — Eurostat flash: euro area September inflation 3.8%, core 2.5%. (Source: ec.europa.eu)
2026-10-02 — Tokyo September CPI 2.7%, with energy down 2.0%. (Source: stat.go.jp)
2026-09-18 — Japan August CPI 1.9%; energy -0.7%, so headline equals the ex-fresh-food-and-energy rate. (Source: stat.go.jp)
2026-09-17 — Bank of England open letter: UK CPI 3.1% in August, 0.7 points of the overshoot from direct energy effects. (Source: bankofengland.co.uk)
2026-09-17 — Eurostat: euro area inflation 3.2% in August; energy 14.3%. (Source: ec.europa.eu)
2026-09-16 — FOMC raises the federal funds range to 3.75-4%, saying inflation remains elevated. (Source: federalreserve.gov)
2026-04-30 — Bank of England open letter: UK CPI 3.3% in March, driven by petrol and diesel. (Source: bankofengland.co.uk)
2026-04-16 — Eurostat: euro area inflation 2.6% in March from 1.9% in February as energy turns positive. (Source: ec.europa.eu)
2026-03-19 — Bank of England: Hormuz disruption pushes Brent above $100 and European gas up about 60%. (Source: bankofengland.co.uk)
2026-02-05 — Bank of England expects UK CPI (3.4% in December) back near 2% from April 2026, mainly on energy prices. (Source: bankofengland.co.uk)
2025-12-18 — Bank of England: UK CPI 3.2% in November 2025, down from 3.8% in September 2025. (Source: bankofengland.co.uk)
Key actors and links
Inflation (theme:inflation): Parent theme; headline inflation is the all-items measure within it, as opposed to core.
U.S. headline/core CPI (indicator:us-cpi): US CPI-U all items, 3.7% in September 2026, is the US headline series.
Bank of England (actor:bank-of-england): Its remit targets headline CPI at 2%; open letters were triggered in April and September 2026.
Federal Reserve (actor:federal-reserve): Targets 2% on PCE, not CPI; it hiked on 2026-09-16 citing elevated inflation.
ECB (actor:ecb): Targets 2% headline HICP over the medium term; euro area HICP was 3.8% in September.
Bank of Japan (actor:bank-of-japan): Japan's headline CPI (1.9% in August) is held down by negative energy inflation.
Energy-driven inflation pressure (theme:energy-driven-inflation): Energy is the main gap between headline and core in the US, UK and euro area in 2026.
Oil and refined-product prices (indicator:oil-refined-product-prices): Gasoline (+34.2% US) and motor fuels (+29.8% UK) are the largest headline drivers.
Food inflation (theme:food-inflation): Food is in headline but not core; consumer food inflation stayed low (UK 1.3%, US 2.5%) in September.
FAO Food Price Index (indicator:fao-food-price-index): World food commodity prices (136.0, +5.8%) are an upstream risk to the food part of headline.
Inflation expectations (indicator:inflation-expectations): Central banks look through headline energy jumps unless they shift expectations and wages.
Strait of Hormuz (place:strait-of-hormuz): Hormuz shipping disruption is the cause the Bank of England gives for the 2026 energy-price rise.
United Kingdom (country:united-kingdom): UK headline CPI 3.5% in September 2026, above France and Germany per the ONS.
Japan (country:japan): Japan's August headline (1.9%) sat below the 2.5%-plus rates in the US, UK and euro area.
Why it matters now
Energy has opened a wide gap between headline and core inflation across most of the rich world. After shipping through the Strait of Hormuz was disrupted in March 2026, the Bank of England reported Brent above $100 and European gas up about 60%. Euro area inflation was 1.9% in February 2026, with energy falling. By September it was 3.8%, with energy up 18.9% and contributing 1.71 points. US CPI rose 3.7% in September, with gasoline up 34.2%, while core was 2.6%. UK CPI rose to 3.5% in September, with motor fuels up 29.8%, while core was 2.8%. Japan is the exception: August headline CPI was 1.9%, because energy prices there were 0.7% lower than a year earlier.
The mechanism has three stages. First, the direct effect: fuel and power prices enter the index at once, weighted by how much households spend on them. Second, indirect effects: firms pass on higher transport and energy costs in food and goods prices over months. Third, second-round effects: if people expect higher inflation, they push for higher pay and firms raise margins, and inflation becomes lasting. The Bank of England says direct energy effects made up 0.7 points of the UK's 1.1-point overshoot in August, and expects indirect effects to add around 0.6 points by early 2027. Central banks say they look through the first stage and lean against the third. That is why a headline jump now shows up in rate decisions: the Fed raised rates on 2026-09-16, and three of nine Bank of England members voted to hike in September.
Food is a slower risk. World food commodity prices rose 5.8% in the year to September, per the FAO, but shop food inflation stayed low in September at 1.3% in the UK and 2.5% in the US.
Risks and open questions
Bull case: Headline inflation is high mostly because of energy, and energy shocks fade from annual rates. In September the gap between headline and core was 1.1 points in the US (3.7% vs 2.6%), 0.7 in the UK (3.5% vs 2.8%) and 1.3 in the euro area (3.8% vs 2.5%). Food inflation at the shop is still low. If oil and refined product prices stop rising, the energy effect drops out of the 12-month rate within a year even if prices stay high, because the rate compares with a year earlier. Japan shows the reverse case: energy at -0.7% kept its August headline at 1.9%. Inference (AA): in this path headline rates peak in late 2026 or early 2027, close to the Bank of England's own forecast peak, and fall back without lasting damage to inflation expectations.
Bear case: Energy is starting to leak into everything else. UK core rose from 2.6% to 2.8% and services from 3.4% to 3.7% in one month. Euro area core edged up from 2.4% to 2.5%. The Bank of England expects indirect energy effects, via supply chains, to add around 0.6 points to UK CPI by early 2027, and it forecasts CPI slightly above 4% then. World food commodity prices are up 5.8% on the year, which can reach shop prices with a lag. Inference (AA): several years of above-target headline inflation make it more likely that households and firms build higher prices into pay and pricing, which is the second-round effect central banks say they will lean against. That raises the odds of further rate rises in the US, UK and euro area.
Falsifiers: - The energy-only case fails if October core inflation rises again in the UK (2026-11-18) and the euro area flash (2026-11-04) while energy prices are flat. - The energy-only case fails if consumer food inflation in the US, UK or euro area climbs well above its September level within two releases, as world food prices pass through. - The spreading case fails if US, UK and euro area core rates fall in the October and November releases while headline stays energy-driven. - The spreading case fails if Japan's headline stays below core-core as energy subsidies or lower energy prices offset the oil shock. - The AA expectations inference fails if central banks' own measures show stable longer-term inflation expectations through early 2027.
Value accrual gate: Not a crypto asset. High headline inflation transfers value from holders of cash and fixed-rate bonds, and from wage earners whose pay lags, to energy producers and fixed-rate debtors. AA does not assume any asset benefits; the effect depends on how central banks respond.
What to watch
Japan national CPI for September 2026. (2026-10-23); Source: stat.go.jp
Euro area flash HICP for October 2026. (2026-11-04); Source: ec.europa.eu
Bank of England decision and November Monetary Policy Report, the first forecast after UK CPI hit 3.5%. (2026-11-05); Source: bankofengland.co.uk
US CPI for October 2026. (2026-11-10); Source: bls.gov
UK CPI for October 2026, the first to include October's higher diesel prices. (2026-11-18); Source: ons.gov.uk
Japan national CPI for October 2026. (2026-11-20); Source: stat.go.jp
AA inference
Inference (AA): Headline inflation is the number households feel and the one most central-bank remits are judged on, but central banks act on whether it spreads into core. AA treats the headline-core gap as the graph's energy-shock gauge: a wide gap with flat core points to a temporary shock, while a narrowing gap because core rises points to second-round effects. AA watches the October releases (euro area 2026-11-04, US 2026-11-10, UK 2026-11-18) for that test, and keeps Japan as a contrast case where energy is pulling headline down.
Sources
BLS (released 2026-10-14, 8:30 a.m. Eastern Time): the US CPI for All Urban Consumers rose 3.7% in the 12 months to September 2026, up from 3.4% in August, and 0.6% in the month, seasonally adjusted. (Source: bls.gov, accessed 2026-10-21)
BLS, September 2026: energy up 20.4% over 12 months (5.2% in the month); gasoline up 34.2% (9.1% in the month, seasonally adjusted); food up 2.5%; food at home 1.8%; shelter 3.2%; all items less food and energy 2.6% (0.3% in the month). (Source: bls.gov, accessed 2026-10-21)
BLS: the October 2026 CPI is scheduled for 2026-11-10 at 8:30 a.m. Eastern Time. (Source: bls.gov, accessed 2026-10-21)
ONS (2026-10-21): UK CPI rose 3.5% in the 12 months to September 2026, up from 3.1% in August, and 0.4% in the month; CPIH 3.6%; RPI 3.9%. (Source: ons.gov.uk, accessed 2026-10-21)
ONS, September 2026: core CPI (excluding energy, food, alcohol and tobacco) 2.8%, up from 2.6%; goods 3.2% (2.7%); services 3.7% (3.4%); food and non-alcoholic drinks 1.3%, unchanged. (Source: ons.gov.uk, accessed 2026-10-21)
ONS, September 2026: motor fuels up 29.8% on the year (23.0% in August); petrol averaged 169.5p a litre, the highest since August 2022, and diesel 192.5p, the highest since July 2022; transport contributed 0.94 percentage points to CPI; restaurants and hotels made the largest downward contribution. Next release 2026-11-18. (Source: ons.gov.uk, accessed 2026-10-21)
ONS, September 2026: on a comparable measure UK CPI (3.5%) was above France (3.4%) and Germany (3.3%). (Source: ons.gov.uk, accessed 2026-10-21)
Eurostat (2026-10-16): euro area annual HICP inflation was 3.8% in September 2026, up from 3.2% in August and 2.2% a year earlier; EU inflation also 3.8%. (Source: ec.europa.eu, accessed 2026-10-21)
Eurostat, September 2026: euro area energy inflation 18.9% (14.3% in August), contributing 1.71 percentage points; services 3.2% (1.52 points); food, alcohol and tobacco 1.3%; non-energy industrial goods 1.1%. Highest rates: Romania 6.5%, Lithuania 6.1%; lowest Sweden 1.0%. (Source: ec.europa.eu, accessed 2026-10-21)
Eurostat flash estimate (2026-10-02): September euro area inflation 3.8%; excluding energy, food, alcohol and tobacco 2.5% (2.4% in August). (Source: ec.europa.eu, accessed 2026-10-21)
Eurostat: the October 2026 flash estimate is due 2026-11-04 and the full October release 2026-11-18. (Source: ec.europa.eu, accessed 2026-10-21)
Eurostat (2026-09-17): euro area inflation 3.2% in August 2026, up from 2.9% in July; energy 14.3% (10.3% in July). (Source: ec.europa.eu, accessed 2026-10-21)
Eurostat (2026-04-16): euro area inflation 2.6% in March 2026, up from 1.9% in February; energy swung from -3.1% to +5.1%; core eased to 2.3% from 2.4%. (Source: ec.europa.eu, accessed 2026-10-21)
Statistics Bureau of Japan (2026-09-18): national CPI for August 2026 rose 1.9% year on year (2025 = 100); excluding fresh food 1.7%; excluding fresh food and energy 1.9%; energy -0.7%. (Source: stat.go.jp, accessed 2026-10-21)
Statistics Bureau of Japan (2026-10-02): Tokyo ku-area CPI, September 2026 preliminary, all items +2.7%; excluding fresh food +2.7%; excluding fresh food and energy +3.0%; energy -2.0%. (Source: stat.go.jp, accessed 2026-10-21)
Statistics Bureau of Japan release schedule: national CPI for September 2026 on 2026-10-23 and for October on 2026-11-20; Tokyo ku-area CPI for October on 2026-10-30. (Source: stat.go.jp, accessed 2026-10-21)
FAO (2026-10-02): the FAO Food Price Index averaged 136.0 points in September 2026, up 1.5% from August and 5.8% from September 2025; cereals rose 5.1% in the month; FAO cited transport disruptions, including Black Sea logistics and uncertainty over Strait of Hormuz shipping, and weather. (Source: fao.org, accessed 2026-10-21)
Federal Reserve (2026-09-16): the FOMC raised the federal funds target range to 3.75-4% by 12-0, saying 'Inflation remains elevated' and that the move supports a timelier return to its 2% goal. (Source: federalreserve.gov, accessed 2026-10-21)
Federal Reserve: the 2% longer-run goal is measured by the annual change in the price index for personal consumption expenditures (PCE), not the CPI. (Source: federalreserve.gov, accessed 2026-10-21)
ECB: the Governing Council aims for 2% inflation over the medium term, measured by the HICP, and its commitment is symmetric. (Source: ecb.europa.eu, accessed 2026-10-21)
HM Treasury remit (2025-11-26): the Bank of England's target is 2% for the 12-month increase in CPI, symmetric, with an open letter if inflation is more than 1 percentage point away. (Source: gov.uk, accessed 2026-10-21)
Bank of England open letter (2026-09-17): of August's 1.1-point overshoot, direct energy effects from the Middle East conflict, mostly motor fuels, accounted for 0.7 points; indirect effects via supply chains are expected to add around 0.6 points by 2027 Q1. (Source: bankofengland.co.uk, accessed 2026-10-21)
Bank of England (2026-09-17): CPI is expected to rise to around 3.75% in 2026 Q4 and slightly above 4% in 2027 Q1, based on energy prices of 14 September. (Source: bankofengland.co.uk, accessed 2026-10-21)
Bank of England open letter (2026-04-30): UK CPI 3.3% in March 2026, up from 3.0% in February, mostly on petrol and diesel after disruption to shipping through the Strait of Hormuz. (Source: bankofengland.co.uk, accessed 2026-10-21)
Bank of England (2026-03-19): Brent crude rose above $100 a barrel and European wholesale gas prices rose about 60% after conflict disrupted shipping through the Strait of Hormuz. (Source: bankofengland.co.uk, accessed 2026-10-21)
Bank of England (2026-02-05): UK CPI was 3.4% in December 2025 and was then expected to return to around 2% from April 2026, mainly because of energy prices. (Source: bankofengland.co.uk, accessed 2026-10-21)
Governor Bailey (2026-05-29): the MPC looks through direct energy effects, leans moderately against indirect effects, and second-round effects build more slowly than direct and indirect effects. (Source: bankofengland.co.uk, accessed 2026-10-21)