A percentage in an inflation headline is easy to remember. Understanding the comparison behind it takes another moment, and that moment can make the story much clearer.

What the CPI measures

The Central Statistics Office’s Consumer Price Index measures changes over time in the prices of goods and services people typically buy. It is a broad measure, not a personalised account of one household’s spending. The CSO describes the CPI as Ireland’s official measure of inflation. [1][2]

Ask: compared with when?

An annual change compares a period with the corresponding period a year earlier. A monthly change compares with the previous month. Both can appear in the same release, so keep the comparison attached to the number when you share it.

A simple example illustrates the difference between a rising price and a slower rise. If a fictional basket moves from €100 to €105, then to €107.10, its price is still increasing. The annual increase in the second step is smaller, but the basket has not returned to €100. These figures are an illustration, not current Irish inflation data.

Your own basket can look different

Households spend different amounts on different things. Someone paying a large energy bill may experience a different pattern from someone whose spending is concentrated elsewhere. A national index helps describe a wider trend; your own receipts help describe your own budget.

When reading a release, check the date, the time comparison, the category breakdown and whether the article links to the original CSO publication. Avoid treating an undated screenshot as a new result.

The links below explain the measure. This guide does not quote the latest inflation rate or make a forecast. Sources were checked on 9 October 2026.