The Inland Revenue Staff Federation (IRSF) was a trade union in the United Kingdom.
The union was founded in 1936 with the merger of the Association of Officers of Taxes, the National Association of Assessors and Collectors of Taxes and the Valuation Office Clerical Association. Its Assistant Secretary from 1936 until World War II was future Prime Minister of the United Kingdom James Callaghan.[1]
In 1938, the Inland Revenue Minor Establishments' Association joined the union. The union initially operated on a federal basis but, in 1939/40, it became a single organisation.[1]
In 1996, the IRSF merged with the National Union of Civil and Public Servants to form the Public Services, Tax and Commerce Union.[1]