Inflation: Data on both the CPI and RPI inflation indices.Jump to full report >>
The Consumer Prices Index (CPI) is the main measure of inflation. It is produced in line with international standards and is the measure used for the Bank of England’s 2% inflation target. The Retail Prices Index (RPI) is no longer classified as a National Statistic as the way it is calculated does not meet international standards. It is included here as it is well-known and is the longest running measure of inflation.
The CPI inflation rate was 3.0% in September 2017, slightly higher than in August when it was 2.9%, and continuing the increase from 2.6% in July.
The RPI inflation rate held steady at 3.9% in September, the same as in August. This is the RPI’s highest rate since January 2012.
The rise in the CPI rate was entirely due to increases in the cost of transport, recreation and culture and food, and was partly offset by decreases in all other categories.