Over a year, the Consumer Price Index (CPI) should increase by 1.2% in December 2017 according to the provisional estimate made at the beginning of January 2018. After four months of rise, the year-on-year inflation should thus be stable. This stability should result from a slowdown in energy prices and food prices, offset by an acceleration in tobacco prices and a lesser drop in manufactured product prices. On the other hand, services prices should increase at the same pace as in November.

Over one month, consumer prices should accelerate: +0.3% after +0.1% in November. This sharper rise should come from a rebound in services prices and in manufactured product prices. On the other hand, energy prices should slow down in the wake of those of petroleum product prices. Tobacco prices should decelerate too. Lastly, food prices should be stable over one month.