Note: The chart excludes Northern Ireland. Self-employed contributions include Class 2 and Class 4 NICs; employer contributions include secondary Class 1, Class 1A and Class 1B NICs.
Source: Government Actuary’s Department (2021), ‘Report to Parliament on the 2021 re-rating and up-rating orders’, available here.
Income tax is the single most important source of revenue for the UK Treasury. It is forecast to raise around £200 billion in 2021–22 – about a quarter of all government tax receipts.