CPI and RPI Index: Updating Weights for UK Inflation Measurement

The Consumer Prices Index (CPI) and Retail Prices Index (RPI) measure monthly changes in the cost of a representative basket of goods and services in the UK. The Office for National Statistics updates the weights used to compile these indices annually based on the latest household spending information. This dataset, designated as National Statistics, provides the updated weighting information for these key inflation measures.

Use Cases

• Modeling inflation trends based on the annual weight updates for consumer goods and services categories.
• Analyzing changes in household spending patterns based on the updated basket weights.
• Comparing the CPI and RPI methodologies based on their respective weighting structures.
• Forecasting price changes for specific categories based on their assigned weights in the indices.

Strengths

• Produced by the Office for National Statistics, a designated National Statistics authority.
• Weights are updated annually using the latest available household spending data, suggesting regular maintenance.
• Covers two primary UK inflation measures, CPI and RPI, allowing for comparative analysis.

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 bias inherent to its UK-only coverage.

Provenance

Source

Office for National Statistics

Collection Method

Weights are compiled from household spending surveys and updated annually.

Freshness

Last updated 2026-07-08 13:33:09.071352; freshness should be verified.

Geography

United Kingdom