In the civil service of the United Kingdom, His Majesty’s Exchequer, or just the Exchequer, is the accounting process of central government and the government's current account (i.e., money held from taxation and other government revenues) in the Consolidated Fund. It can be found used in various financial documents including the latest departmental and agency annual accounts.

It was the name of a British government department responsible for the collection and the management of taxes and revenues; of making payments on behalf of the sovereign and auditing official accounts. It also developed a judicial role along with its accountancy responsibilities and tried legal cases relating to revenue.

Similar offices were later created in Normandy around 1180, in Scotland around 1200 and in Ireland in 1210.