One of the consumer price indices used as the domestic measure of inflation in the UK (see also Consumer Prices Index (CPI)). The RPI is no longer an official statistic but is still published by the Office for National Statistics. It measures the average change from month to month in the prices of goods and services purchased by most households in the UK. The government uses the RPI for the uprating of some tax allowances and index-linked gilts. It is commonly used in private contracts for uprating of maintenance payments and housing rents. It is also used for wage bargaining.

For further information, see the Office for National Statistics website.