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May 2025 inflation data

The UK’s inflation rate in May 2025, as measured by the Consumer Price Index (CPI), was 3.4%.

The detailed figures for the year to May 2025 are:

  • CPI inflation was 3.4% in May 2025 (Index: 138.4), down from 3.5% in year to April**
  • RPI* inflation was 4.3% in May 2025 (Index: 402.9), down from 4.5% in the year to April**
  • CPIH inflation was 4.0% in May 2025 (Index:138.0), down from 4.1% in the year to April**

*The Office for National Statistics no longer regards the RPI as an official measure of inflation.

**The ONS has said that the April 2025 CPIH, CPI and RPI figures were incorrect due to faulty data supplied by the Department of Transport relating to vehicle excise duty. This had the effect of overstating the annual rate of change by 0.1 percentage points for the published April 2025 figures only.