French Inflation Rises to 3.0% in September as Energy Prices Accelerate

French consumer inflation accelerated to 3.0% year over year in September, up from 2.4% in August, as energy prices climbed sharply and food and services inflation also picked up. The rate matched February 2024 and was the fastest recorded since then.

INSEE’s preliminary September estimate showed energy prices up 21.2% from a year earlier, compared with 16.7% in August. Food inflation rose to 1.5% from 1.1%, while services inflation increased to 2.2% from 1.9%. Manufactured-product prices were still lower than a year earlier, but their decline narrowed to 0.3% from 0.4%. Tobacco inflation was unchanged at 3.3%.

France’s Harmonised Index of Consumer Prices, the measure designed for comparison across European Union countries, rose 3.4% from a year earlier after a 2.6% increase in August. Even with those stronger annual rates, the national CPI fell 0.3% from August as post-summer declines in travel and accommodation prices pulled down the monthly index.

Energy inflation reaches 21.2% as fresh food prices also climb

Energy was the clearest source of renewed price pressure. INSEE said the September acceleration was driven by petroleum products and gas. The rise extends a trend already visible through the summer: energy inflation was 11.0% in June, 12.6% in July and 16.7% in August before reaching 21.2% in September. That progression has increasingly lifted the headline rate even though several other categories remain much less inflationary.

Food prices also moved higher, but the pressure was concentrated in fresh products. Fresh-food prices were up 9.9% from September 2025, compared with 5.9% in August. Other food products rose only 0.4% year over year, the same pace as in August. The split shows that the 1.5% overall food-inflation rate did not reflect a broad acceleration across every grocery category.

For services, annual inflation rose to 2.2%. INSEE attributed part of that increase to a less pronounced seasonal decline in accommodation and transport prices than in September 2025. That distinction matters because it does not mean those prices jumped from August. The monthly index moved lower, and the statistical agency identified the post-summer drop in transport and accommodation services as the main reason.

Manufactured goods remained a counterweight, with prices down 0.3% from a year earlier. That decline was slightly smaller than August’s 0.4% fall. Overall, energy and fresh food did most of the lifting, services firmed somewhat, and manufactured goods continued to restrain the headline rate.

Monthly prices fell after summer even as the annual rate rose

The apparent contradiction between falling monthly prices and faster annual inflation comes from the different comparison periods. Consumer prices were estimated to have fallen 0.3% in September from August after rising 0.7% in August. The year-over-year rate compares September 2026 with September 2025, while the monthly figure compares September only with August.

INSEE attributed the monthly fall mainly to seasonal declines in services after the summer period, particularly transport and accommodation. Higher energy prices, led by petroleum products and gas, offset much of that decline. Manufactured-product prices increased over the month, as they typically do in September, and food prices rose for a third consecutive month, again led by fresh products. Tobacco prices were stable from August.

On the harmonised measure, prices fell 0.4% from August but were 3.4% higher than a year earlier. HICP is especially relevant for cross-country comparisons because it is compiled on a common European basis. It is not identical to France’s national CPI, including because the two measures treat some health costs differently.

Because the September release is provisional, INSEE cautions that the figures are based on a more limited set of price observations and estimates for some price changes that are not yet available at month-end. The agency is scheduled to publish final September CPI results on October 15.

France’s reading arrives as the ECB responds to an energy-led inflation shock

France’s September numbers add to evidence that higher energy costs are feeding back into euro-area inflation. On September 10, the European Central Bank raised its three key interest rates by 25 basis points, saying the conflict in the Middle East continued to generate inflation pressure and that inflation was expected to remain above its 2% target for an extended period.

Effective September 16, the ECB lifted the deposit facility rate to 2.50%, the main refinancing rate to 2.65% and the marginal lending facility rate to 2.90%. Its September staff projections put average euro-area headline inflation at 3.0% in 2026, 2.5% in 2027 and 2.1% in 2028. The central bank also said higher energy prices were expected to pass gradually into core and food inflation.

No single French inflation reading determines ECB policy. The central bank targets inflation for the euro area as a whole and bases its decisions on the broader outlook, underlying price pressures and the transmission of monetary policy. Still, France’s 3.4% harmonised reading shows that one of the bloc’s largest economies is experiencing the same energy-driven pressure that has become central to the ECB’s current assessment.

Two dates now matter for the next read on inflation. Eurostat is scheduled to publish its flash estimate for September euro-area inflation on October 2, and INSEE will revisit France’s September figures with final CPI and HICP results on October 15.