How to track food inflation: from FAO to your supermarket receipt
Food inflation is one of the most visible and politically sensitive components of CPI — yet it's driven by global commodity markets that are entirely separate from domestic monetary policy. Here's how to track it from global signals to your local basket.
Food is the most tangible part of inflation for most households — it appears on every receipt, every week. Yet the food CPI in official statistics is often diverging from what consumers see in shops. Understanding why requires tracking food prices through multiple layers: global commodity markets, processing and transport costs, retail margins, and finally the consumer price.
This guide shows how to follow that chain and interpret food price data at each stage.
Start with the FAO Food Price Index for the global signal
The FAO Food Price Index is the most comprehensive global commodity food price measure, published monthly by the UN Food and Agriculture Organization. It covers five sub-indices: cereals, vegetable oils, dairy, meat, and sugar. As of September 2026, the overall index is at 118 (base: 2014–16 = 100), down ~28% from its March 2022 peak of 159.7.
The FAO index measures wholesale international trade prices — not retail consumer prices. There is a typical lag of 3–9 months from FAO commodity movements to CPI food, depending on: how much processing the food undergoes (raw wheat takes longer to reach bread prices than crude palm oil takes to reach edible oil prices), hedging practices by food companies, and competitive conditions in retail. When the FAO index moves significantly (as it did in 2022, +40% in 3 months), expect CPI food to follow with a lag. Our global food outlook tracks the current position.
Check producer prices for the factory-gate signal
Between global commodities and retail shelves, food goes through processing, packaging, and distribution. The Producer Price Index (PPI) food component captures prices at the factory-gate — after commodities are processed but before retail margins are applied. PPI food typically leads CPI food by 2–4 months. In the US, the BLS publishes PPI food manufacturing; in the UK, the ONS publishes the Producer Price Index with separate food categories.
Current UK PPI food output: approximately +1.5% YoY (down from +25% peak in 2022). US PPI finished goods food: approximately +0.8% YoY. These low readings confirm the commodity disinflation has passed through the supply chain — and suggest UK and US food CPI will remain modest through early 2027 absent a new commodity shock. See the PPI glossary entry for the full methodology.
Read the CPI food sub-components: at-home vs away-from-home
CPI food is divided into two very different components with different drivers:
Food at home (groceries): Directly linked to commodity prices through the supply chain. When wheat prices fell 40% from 2022 peaks, bread and pasta prices followed (with a lag). Food at home in the US is currently +1.8% YoY — near normalised. In the UK, food CPI overall is ~+3% after a +19% peak. The normalisation is real but slower than commodity prices would suggest, partly due to supermarket margin recovery after the price squeeze of 2022–23.
Food away from home (restaurants, cafes): Driven primarily by labour costs, not commodity costs — and therefore behaves much more like services inflation. US food away from home: +3.8% YoY (higher than food at home, driven by hospitality wages). UK restaurants and hotels: +5.0%. This component barely responded to the commodity disinflation because wages didn't fall. This is another manifestation of the services vs goods divergence — and it's why the split matters when reading food CPI.
Account for seasonal patterns and base effects in food CPI
Food prices have strong seasonal patterns — vegetables are cheaper in summer (domestic harvest season in temperate climates), more expensive in winter (import-dependent). These seasonal patterns are partly captured in seasonal adjustment, but the base effect component is what matters most for interpreting year-on-year food CPI readings.
Key base effect events to track:
- March–April 2022: Ukraine invasion caused a global grain spike. Any month comparing against March–April 2022 will show a large negative food CPI unless current prices also spiked. By March–April 2026, this base effect has fully unwound.
- August 2023: UK egg, dairy, and vegetable prices hit their post-Ukraine peak. UK food CPI in August 2026 is comparing against a very high base — making the year-on-year reading look lower than the actual price level warrants.
To avoid base-effect confusion, always look at the price index level (not just the rate), which you can track using the inflation explorer.
Assess what food inflation means for monetary policy
Central banks generally "look through" food price shocks for a principled reason: monetary policy cannot grow more wheat or solve a drought. Raising interest rates in response to food inflation reduces demand but doesn't fix the supply problem — and adds unemployment to the mix. The standard central bank framework: food inflation is excluded from core CPI, which is the policy-relevant measure.
The exception: if food inflation persists long enough to shift wage demands and inflation expectations, the initial supply shock becomes a domestic demand and services inflation problem — and does warrant policy response. India is a live example: food CPI at 6%+ for extended periods has kept headline CPI above the RBI target, even though core is at 3.6%, because the public's experience of high inflation affects wage expectations. Our India food inflation analysis and global food outlook cover the current situation.