UK Bonus Tax Calculator
Calculate how much tax and National Insurance you will pay on your bonus for the 2025/26 or 2024/25 tax year. Enter your annual salary and bonus amount to see the full breakdown of deductions and your take-home bonus.
Total Deductions
£1,400.00
Effective rate: 28.00%
Net Bonus
£3,600.00
Take-home amount
Marginal Rate
28.00%
Combined IT + NI
| Deduction | Amount |
|---|---|
| Income Tax on Bonus | £1,000.00 |
| National Insurance (Class 1) | £400.00 |
| Total Deductions | £1,400.00 |
| Net Bonus (Take-Home) | £3,600.00 |
Frequently Asked Questions
How is a bonus taxed in the UK?
Bonuses are taxed as regular income in the UK. HMRC adds your bonus to your salary and calculates income tax cumulatively. The incremental tax on the bonus depends on which tax band the bonus falls into after your salary. National Insurance is also charged on the bonus at employee Class 1 rates.
What is the tax rate on a bonus in the UK?
The tax rate on your bonus depends on your total income. For 2025/26 in England/Wales/NI: 20% basic rate (up to £50,270 total), 40% higher rate (£50,271–£125,140), or 45% additional rate (over £125,140). National Insurance adds 8% on earnings between £12,570–£50,270 and 2% above £50,270. Scotland has different income tax bands.
Does my bonus affect my Personal Allowance?
Yes. If your salary plus bonus exceeds £100,000, your Personal Allowance starts to reduce by £1 for every £2 over £100,000. It is fully removed at £125,140. This creates an effective marginal rate of 60% in the taper zone (40% tax + 20% from losing allowance).