Over a year, the Consumer Price Index (CPI) should rise by 1.4% in January 2018 after +1.2% in the previous month, according to the provisional estimate made at the end of January 2018. This increase in the year-on-year inflation should come from an acceleration in services prices and in energy prices and a slight rebound in "manufactured product" prices whereas food and tobacco should slow down.

Over one month, consumer prices should edge down by 0.1% after +0.3% in December. Energy prices should sharply accelerate because of the increase in Brent crude and in taxation. Food prices should rise slightly. On the other hand, "manufactured product" prices should fell back significantly, due to the beginning of winter sales. Tobacco prices shoud edge down. Lastly, services prices should slow down.

Year on year, the Harmonised Index of Consumer Prices should increase faster than in the previous month (+1.5% after +1.2% in December). Over one month, it should edge down: −0.1% after +0.4%.