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Consumer Prices Index and Retail Prices Index, Updating Weights

The Consumer Prices Index (CPI) and the Retail Prices Index (RPI) measure the changes from month to month in the cost of a representative 'basket' of goods and services bought by consumers within the UK.

This involves weighting together price changes in the indices according to household spending patterns for different categories of goods and services so that each takes its appropriate share.

At the beginning of each year the weights used to compile both the CPI and RPI are updated using the latest available information on household spending.

Here are details of the process for each year shown.

2014 (123.7 Kb Pdf)

2013 (317 Kb Pdf)

2012

2011

2010

2009

2008

2007

2006

2004 

2003

2002 (46.5 Kb Pdf)

 

 

Content from the Office for National Statistics.
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