The Office for Budget Responsibility (OBR) is a non-departmental public body funded by the UK Treasury, that the UK government established to provide independent economic forecasts and independent analysis of the public finances. It was formally created in May 2010 following the general election and was placed on a statutory footing by the Budget Responsibility and National Audit Act 2011. It is one of a growing number of official independent fiscal watchdogs around the world.

His Majesty's Treasury, occasionally referred to as the Exchequer, or more informally the Treasury, is a ministerial department of the Government of the United Kingdom. It is responsible for developing and executing the government's public finance policy and economic policy. The Treasury maintains the Online System for Central Accounting and Reporting, the replacement for the Combined Online Information System, which itemises departmental spending under thousands of category headings, and from which the Whole of Government Accounts annual financial statements are produced.