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This calculator will allow you to check how much in National Insurance contributions an employee needs to pay.

Using the calculator

If you鈥檙e an employee

Use the calculator to find out if the amount of National Insurance contributions you鈥檝e paid is correct.

If you鈥檙e an employer

Use the calculator to find out how much National Insurance you need to deduct from your employees鈥� pay.

If you鈥檙e a software developer

Check the payroll software you have developed is calculating National Insurance contributions for employees and employers correctly.

Before you start

You鈥檒l need:

• the period of pay, which could be:
  • weekly
  • every 2 weeks
  • every 4 weeks
  • monthly
• the date you were paid, if you鈥檙e an employee
• the date you paid your employee, if you鈥檙e an employer
• the amount paid before any deductions
• the employee鈥檚 National Insurance category letter 鈥� this can be found on the employee鈥檚 payslip