According to the report from Insee, in September 2019, the Consumer Prices Index (CPI) fell back, to −0.3% over a month, after a 0.5% rebound in August. This downturn resulted from that, seasonal, in services prices (−1.3% after +0.4% in August), and in a lesser extent that in food prices (−0.5% after +0.5%). Contrariwise, manufactured product prices gathered pace (+1,5% after +0.9% in August) and those of energy increased by 0.3% after a stability in the previous month. Finally, tobacco prices were stable over a month. Seasonally adjusted, consumer prices were unchanged over a month, after +0.1% in August and in July.

Year on year, consumer prices slightly recovered, as in the previous month: +0.9% in September, after +1.0% in August and +1.1% in July. This slight fall in inflation came from a slowdown in the prices of food and energy, partly offset by an acceleration in services prices and a lesser drop in manufactured products prices.

Year on year, core inflation increased in September: +0.9% after +0.7% in the previous month. The Harmonised Index of Consumer Prices (HICP) fell back over a month, to −0.4% after +0.5% in August; year on year, it rose by 1.1%, after +1.3% in the previous month.