Set ddata Consumer price inflation time series

Notice

20 August 2025

We have identified an error in the imputation of missing seasonal item indices in months for which no price data are available. This error has no impact on headline Consumer Prices Index (CPI) or the Consumer Prices Index including owner occupiers’ housing costs (CPIH) annual growth rates. The Retail Prices Index (RPI) is also unaffected.

This minor error has no impact on growth rates at divisional level. However, a small number of classes within two divisions have seen annual growth affected by up to 0.1 percentage points, for the periods February to June 2025. These are:

  • furniture, household equipment and maintenance

  • recreation and culture

More details on the lower-level impacts can be found in our CPIH microdata release.

In line with the Office for National Statistics (ONS) consumer prices revisions and correction of errors policy, we have not corrected the indices for those months. However, we have corrected the error in the July 2025 published indices and in the 2025 price quotes dataset.

The error is isolated to one specific imputation process, which has been rebuilt as part of modernising a legacy production system. The ONS is reviewing its testing and quality assurance processes in response to this issue.

About this Dataset

Comprehensive database of time series covering measures of inflation data for the UK including CPIH, CPI and RPI.

Edition in the dataset

csv (21.7 MB)
xlsx (18.9 MB)
structured text (13.0 MB)

Previous versions of this data are available.

Nodiadau pwysig a gwybodaeth ynghylch defnyddio

CPIH and CPI estimates for the period 1950 to 1988 (1949 to 1987 for index values) are also available. Please note that these earlier estimates are not National Statistics. They have been modelled and are provided purely for indicative purposes.

In December 2018, we published extended series for the components of CPIH covering 1988 to 2004 and CPI covering 1988 to 1995. We have now added historical series for the goods and services analyses. All of the extended series were modelled after the introduction of CPIH and CPI and do not form part of the ongoing National Statistics series at 1 decimal place.

View all data related to Inflation and price indices

Manylion cyswllt ar gyfer y set ddata hon

Consumer Price Inflation team
cpi@ons.gov.uk
Consumer Price Inflation Enquiries: +44 1633 456900. Consumer Price Inflation recorded message (available after 8am on release day): +44 800 0113703

Cyhoeddiadau sy'n defnyddio'r data hwn