UK Bonus & Overtime Tax Calculator 2026/27
Enter annual salary and a cash bonus, or build overtime from rate, hours and multiplier, to estimate how much extra pay you keep after marginal deductions.
Rates reviewed 14 August 2026. Methodology
Published and source-checked by Mehmood Rajoka, founder and publisher. Review our editorial policy.
Example result
Net bonus pay
£3,600.00
Marginal deductions
£1,400.00
From £5,000.00 gross extra pay in this annual estimate.
Gross Extra Pay
£5,000.00
You Keep
72.00%
of gross extra pay
Marginal Deduction Rate
28.00%
Extra Pay Deduction BreakdownView details
- Income Tax
- Marginal£5,000.00Tax £1,000.00
- Employee NI — category A
- Marginal£5,000.00Tax £400.00
- Undergraduate student loan
- Selected plan£5,000.00Tax £0.00
- Postgraduate loan
- 6% when selected£5,000.00Tax £0.00
- Total extra deductions
- £5,000.00Tax £1,400.00
- Net bonus pay
- £5,000.00Tax £3,600.00
Extra Pay Deduction Breakdown
| Deduction | Rate | Gross Extra | Extra Deduction |
|---|---|---|---|
| Income Tax | Marginal | £5,000.00 | £1,000.00 |
| Employee NI — category A | Marginal | £5,000.00 | £400.00 |
| Undergraduate student loan | Selected plan | £5,000.00 | £0.00 |
| Postgraduate loan | 6% when selected | £5,000.00 | £0.00 |
| Total extra deductions | £5,000.00 | £1,400.00 | |
| Net bonus pay | £5,000.00 | £3,600.00 |
Annual take-home comparison
Estimated take-home rises from £32,319.60 to £35,919.60, a difference of £3,600.00.
Employer view
The extra pay creates £750.00 of estimated employer NI, making the employer's incremental cost £5,750.00 before pension or other costs.
Official sources
Rates and thresholds are checked against the following primary sources. Review dates are shown on the relevant guide or methodology page.
Last reviewed: 14 August 2026
Scope and limitations
Frequently Asked Questions
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