Written Question·Treasury·UIN 102216
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, what analysis her Department has undertaken on the potential fiscal implications for future public spending decisions of altering the declining discount rate regime.
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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