UK National Insurance Calculator 2024/25

National Insurance (NI) is a tax on earnings paid by employees, employers, and the self-employed in the UK. For employees (Class 1 NI), contributions are charged at 8% on earnings between the Primary Threshold (£12,570 per year) and the Upper Earnings Limit (£50,270 per year), and at 2% on earnings above £50,270. NI contributions fund the state pension, the NHS, and other state benefits. Unlike income tax, NI is calculated on a weekly or monthly basis rather than annually, which can lead to differences if your income varies. Our calculator shows your annual, monthly, and weekly NI contributions based on your gross salary, using the current 2024/25 rates.