The amount the UK raises through income taxes (a category that includes smaller taxes such as capital gains tax, as well as the main income tax) is broadly in line with international norms
The biggest difference between the UK and most higher-tax countries is the amount of revenue raised through social security contributions (SSCs) levied on employees and employers. In 2019, National Insurance contributions (the UK version of SSCs) raised 6.6% of GDP, compared with 12.0% on average for the EU14. The UK’s lower revenues from SSCs more than explain the UK’s below-average tax take – the UK raises more than both the OECD and G7 average from taxes excluding SSCs.