Bonus Tax Calculator UK
Instantly see how much tax and National Insurance you'll pay on your bonus with our free 2025/26 bonus tax calculator.
Bonus Tax Calculator
Estimate the tax on your bonus for the 2025/26 tax year.
Bonus Breakdown
An estimate of what you'll take home from your bonus.
Take-Home From Bonus
£5,297.30
Gross Bonus
£10,000.00
Income Tax
-£4,486.50
National Insurance
-£216.20
Total Deductions
-£4,702.70
How Your Bonus is Taxed
Receiving a bonus is great, but it's often surprising how much is deducted. Bonuses are taxed as regular income, meaning they are subject to both Income Tax and National Insurance.
Income Tax on Bonuses
Your bonus is added to your total annual income.
Your bonus isn't taxed separately; it's added on top of your regular salary. This combined total is used to determine your tax bracket for the year.
This can mean that if your bonus pushes your total income into a higher tax bracket (e.g., from the 20% basic rate to the 40% higher rate), that portion of your bonus will be taxed at the higher rate. See our guide on tax bands for more info.
National Insurance on Bonuses
Bonuses are also subject to NI contributions.
National Insurance is calculated on a per-pay-period basis. When you receive a bonus, your earnings in that pay period (usually a month) increase, so you'll pay more NI for that period.
Most bonuses are subject to the same NI rates as your regular salary, which for most people is 8% up to the Upper Earnings Limit and 2% on anything above that. You can find out more with our NI calculator.
Why the Tax Seems High
Your bonus is often taxed at your highest marginal rate.
Because your regular salary has likely already used up your tax-free Personal Allowance and the lower tax bands, your bonus is effectively taxed at the highest rate you pay. Use our calculator to see the precise breakdown for your specific situation or our main take-home pay calculator for a full salary breakdown.