Free UK pay tool · 2026/27
Bonus tax calculator
Compare your annual pay with and without a bonus to estimate extra Income Tax, National Insurance and the bonus you keep.
How is a bonus taxed in the UK?
A cash bonus is employment income. It is added to your other earnings and can push some income into a higher tax band. Employee National Insurance can also apply, so a bonus is not taxed at one universal rate.
Why might the payslip amount differ?
This tool spreads annual earnings, including the bonus, across 12 notional months for National Insurance. A bonus paid in one month can produce a different NI deduction. The result is an annual comparison, not a prediction of that month’s payslip.
PAYE works through each payroll period. A large one-off bonus can make that month look heavily taxed, while cumulative PAYE may correct some of the difference later. Your tax code, pension, student loan and previous earnings also matter.
For a personalised estimate including those settings, use the full take-home pay calculator.
These are estimates for one employment using 2026/27 rules. For tax codes, student loans, different UK regions and other deductions, use the full take-home pay calculator. Read how we calculate your pay for the rates, assumptions and limits.