Written Question·Treasury·UIN 102215
Infrastructure: Cost Benefit Analysis
Tabled: 2 January 2026
Answered: 12 January 2026
Question
Callum Anderson
Labour — Buckingham and Bletchley
To ask the Chancellor of the Exchequer, how her Department plans to account for international approaches to social discounting in informing the UK review of discounting in the Green Book.
Answer
James MurrayThe independent review of the Green Book discount rate will be published in the summer 2026. Changes to the Green Book discount rate methodology will affect the appraisal of major infrastructure projects that involve benefits and costs well into the futur...
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