HICP vs CPI — why eurozone inflation uses a different yardstick

When the headlines say "eurozone inflation," they mean one specific measure: the Harmonised Index of Consumer Prices (HICP). It is the index the European Central Bank targets at 2%, the one Eurostat publishes for every member state on the same definition, and the one used on every page of this tracker. Your country almost certainly also publishes a national consumer price index (CPI) — and the two are not the same thing.

What "harmonised" actually means

The whole point of the HICP is comparability. Before it, every country measured inflation its own way — different baskets, different methods, different coverage — so you could not honestly say Spanish inflation was higher or lower than Dutch inflation. The HICP fixes that by imposing one EU-wide methodology, so a percentage point in Lisbon means the same thing as a percentage point in Helsinki. That is what makes a euro-area aggregate meaningful at all.

A national CPI, by contrast, is built for domestic use and follows national tradition. It answers "how are prices changing for people here?" using whatever conventions the national statistics office has long used.

The three differences that matter

1. Owner-occupied housing. This is the big one. Most national CPIs include some measure of the cost of owning your home — mortgage interest, or an imputed rent. The HICP, for now, largely excludes owner-occupied housing. In periods of fast-rising house prices or mortgage rates, a national CPI that captures housing can run meaningfully hotter than the HICP. (The ECB and Eurostat have a long-running project to bring owner-occupied housing into the HICP, but it is not fully in the headline yet.)

2. Coverage of who and what. The HICP counts spending by everyone in the economic territory — including rural households, institutional households, and money spent by foreign visitors — and excludes a few items national indices may keep. National CPIs often target a narrower "typical resident household."

3. Weights. Both indices weight categories by how much households spend on them, but the exact weights and update schedules differ, so the same price moves can nudge the two indices by slightly different amounts.

How far apart do they get?

Usually they track closely — within a few tenths of a percentage point. The gap widens in specific conditions, most often when housing costs are doing something dramatic: a national CPI that includes mortgage interest will pick up rate hikes that the HICP simply does not see. So in a tightening cycle it is normal for the national number a citizen feels to sit above the harmonised number the ECB acts on.

Which one should you look at?

• For comparing countries or judging what the ECB will do, use the HICP. It is the only like-for-like measure across the bloc, and it is the ECB's actual target.
• For a sense of your own cost of living, your national CPI may capture housing better and feel closer to your experience.

Neither is "wrong" — they answer different questions. This tracker uses the HICP throughout, because its job is to compare the euro area on one consistent ruler and to show the figure the central bank is steering by. You can see the bloc-wide number on the eurozone page and the full country ranking on the compare view.

Source: Eurostat (HICP) and the European Central Bank. euroflation is an independent tracker and is not affiliated with the ECB, Eurostat or the EU. Nothing here is financial advice.