Updated for the current tax year (6 April 2024 to 5 April 2025)
How To Use The National Insurance Calculator
- Enter your salary and specify whether it is an annual or monthly figure.
- Choose employment status. This step is important because it informs the calculator about which National Insurance classes to apply.
- Click the 'Calculate' button once you're done, and you'll see your net salary and the National Insurance you're expected pay, all displayed on an annual, monthly, weekly, and daily basis.
National Insurance Rates
Employed
If you are employed, you will pay Class 1 National Insurance contributions. The rates below are the most common for most employees:
- For salaries ranging from £242 to £967 per week (£1,048 to £4,189 per month), the Class 1 rate is 8%.
- For salaries exceeding £967 per week (more than £4,189 per month), the Class 1 rate is 2%.
Self Employed
If you are self-employed, you will pay Class 4 National Insurance contributions.
- On profits between £12,570 and £50,270 the rate is 6%.
- On profits over £50,270 the rate is 2%.
Note: Class 2 National Insurance is now voluntary if have profits of less than £6,725 per year.
Disclaimer: Although the calculations are quite accurate, please use the provided information for illustrative purposes only. Do not make any major financial decisions without consulting a qualified specialist.