How to estimate bonus tax
For a simple annual estimate, add your expected bonus to your annual salary and enter the combined figure as gross annual salary. The calculator will show the estimated tax, NI and take-home result for the year.
Why payslip bonus tax can look odd
Payroll can tax a bonus heavily in the month it is paid because PAYE works through pay periods. This annual calculator is best used as a full-year estimate rather than a precise payslip forecast.
More salary examples
Extra annual salary examples are tucked away here to keep the main calculator page clean. These buttons still use annual salary mode, not hourly mode.
Frequently Asked Questions
Which tax year does this calculator use? +
It uses the 2026/27 UK tax year for England, Wales and Northern Ireland estimates.
Does salary sacrifice reduce National Insurance? +
In this calculator, yes. The pension percentage is treated as salary sacrifice, so the reduced cash pay is used for both income tax and employee National Insurance estimates.
Does this include Scottish income tax? +
No. Scottish income tax rates and bands are different and are not included in this version.
Why might my payslip be slightly different? +
Payroll systems use pay-period thresholds, tax codes and rounding rules. This calculator gives a strong annual estimate, not payroll advice.