Tax on a £100,000 Bonus in the UK
Exact HMRC figures for a £100,000 bonus on top of a £35,000 base salary, tax year 2026-27. Employed PAYE, Class 1 NI, no student loan or pension sacrifice. Scroll for a Scotland comparison and 2025-26 figures.
Gross bonus
£100,000
on top of £35,000
Income tax
£42,467
marginal rate 47%
Employee NI
£2,916
Class 1 at 8% / 2%
Net bonus
£54,617
45.4% deducted
Heads up: this bonus pushes your total income into the higher-rate band. £15,270 of the bonus is still taxed at 20% + 8% NI, but every pound above £50,270 is hit with 40% income tax and just 2% NI (marginal 42%). That's why your effective rate of 45.4% doesn't match any single band — you're straddling two.
This bonus crosses the £125,140 additional-rate threshold, so part of it is taxed at 45% income tax + 2% NI (marginal 47%). You've also fully lost your Personal Allowance somewhere in the £100k–£125,140 range — the so-called "60% trap" — which is why the effective rate of 45.4% is unusually high. A big pension contribution is the classic reclaim lever.
HMRC breakdown — 2026-27
| Component | Amount | Notes |
|---|---|---|
| Gross bonus | £100,000 | On top of £35,000 salary |
| Income tax (incremental) | £42,467 | Marginal rate 47% |
| Employee NI (Class 1) | £2,916 | 8% below UEL / 2% above |
| Total deducted | £45,383 | 45.4% effective |
| Net bonus | £54,617 | What lands in your account |
2025-26 vs 2026-27
Personal Allowance (£12,570), basic/higher/additional thresholds (£37,700 / £125,140), dividend allowance and employee NI rates are all unchanged between 2025-26 and 2026-27, so this bonus produces the same net in both years at a £35,000 salary.
| Tax year | Income tax | NI | Net bonus |
|---|---|---|---|
| 2026-27 | £42,467 | £2,916 | £54,617 |
| 2025-26 | £42,467 | £2,916 | £54,617 |
England/Wales/NI vs Scotland
Scottish Parliament sets its own income tax bands. NI is UK-wide, so the gap is pure income tax.
| Region (2026-27) | Income tax | Net bonus |
|---|---|---|
| England, Wales & NI | £42,467 | £54,617 |
| Scotland | £47,933 | £49,151 |
Scotland nets £5,466 less than E/W/NI at this bonus level.
Run this with your real salary
These figures assume a £35,000 base salary. For a precise net bonus on your own numbers — including student loan, pension sacrifice, and tax-free childcare clawback — use the full calculator.
Frequently asked
How much tax on a £100,000 bonus in the UK?
On a £100,000 bonus added to a £35,000 salary for 2026-27, HMRC takes £42,467 income tax plus £2,916 employee NI, so you net £54,617 (45.4% deducted). Your marginal rate on the next pound is 47%.
What is the Scotland net on a £100,000 bonus?
£49,151 — that's £5,466 less than England/Wales/NI at a £35,000 salary. Scotland's extra Intermediate (21%), Advanced (45%) and Top (48%) bands create the divergence once you cross into higher earnings.
Can I avoid tax by putting the bonus into a pension?
Yes — bonus sacrifice diverts the full £100,000 into your workplace pension before it's taxed, so you keep all £100,000 as pension contribution instead of a smaller net figure. You skip income tax and both 8%/2% employee NI, and many employers also pass across their 15% employer NI saving. Watch the £60,000 annual allowance cap and tapered allowance if you earn over £260k.