During the run-up to Budgets and other policy statements, we subject the Government’s draft costings of tax and spending measures to detailed challenge and scrutiny. We then state in the Economic and fiscal outlook and the Treasury’s costing documents whether we endorse the costings that the Government finally publishes as reasonable central estimates. Our approach to the costings process, including the roles of the Treasury and other relevant departments, and how we incorporate the impact of policy measures in our forecasts is described in Briefing Paper No.6: Policy costings and our forecast.

At each fiscal event, we produce an annex in the Economic and fiscal outlook on the announced policy measures and an accompanying uncertainty ratings database where we assign each certified policy costing a subjective uncertainty rating. We also update our database of policy measures since 1970.

Policy measures database

April 1, 2021 – 981 KB
  • October 2010

    The Office for Budget Responsibility certified costings for some Annually Managed Expenditure measures included within the October 2010 Spending Review. The costings we scrutinised are set out in the HM Treasury Spending Review Policy Costings document. Our certification is contained in Chapter 3.

    Read the Policy Costings document