Self-employed National Insurance contribution rates, 2021–22 Share: Note Rates apply above the stated thresholds. Appears in National Insurance contributions explained Related content International comparison of tax revenue composition, 2019 Taxlab Data Item Types of tax revenue as a share of GDP across developed countries Taxlab Data Item Income tax and social security contributions paid under different countries’ tax systems Taxlab Data Item Income tax explained 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. Taxlab Taxes Explained
