Consumer Prices Index and Retail Prices Index: UK Inflation Basket Weights

Annual updates to the weighting methodology for the UK's Consumer Prices Index (CPI) and Retail Prices Index (RPI). The dataset is produced by the Office for National Statistics and was last updated on 2026-07-08. It reflects changes in household spending patterns used to compile the monthly inflation measures.

Use Cases

• Analyze changes in household consumption patterns based on the annual weight updates.
• Model inflation components based on the representative basket of goods and services.
• Compare CPI and RPI methodologies based on their respective weighting schemes.
• Forecast inflation trends based on shifts in spending weights for different categories.

Strengths

• Produced by the Office for National Statistics, a designated National Statistics authority.
• Annual updates ensure the weights reflect the latest household spending information.
• Covers two primary UK inflation measures: CPI and RPI.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic and temporal bias inherent to UK-only sources.

Provenance

Source

Office for National Statistics

Collection Method

Weights are updated annually using the latest available information on household spending.

Time Range

Annual updates.

Freshness

Last updated 2026-07-08 13:32:37.673512.

Geography

United Kingdom