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Inflation

Asked by Priti PatelConservativeTreasuryTabled Answered 2 September 2025UIN 69821

The question

To ask the Chancellor of the Exchequer, whether her Department has made a forecast of the GDP deflator index for each of the next 100 years.

Answered by Emma Reynolds

HM Treasury does not prepare forecasts for the UK economy. These forecasts, including assessments of the impact of policy decisions, are the responsibility of the independent Office for Budget Responsibility (OBR).

To support their five year forecasts for the UK economy and public finances, the OBR produces long-term projections which cover the next 50 years, including for the GDP Deflator. The OBR’s latest long-term projections can be found here: Long-ptterm economic determinants – March 2025 Economic and Fiscal Outlook.

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