Tax & Investing
Scottish \u00A3100k Personal Allowance Trap Calculator
Earn between \u00A3100,000 and \u00A3125,140 in Scotland? Your effective marginal tax rate could be over 60%.
The £100k trap:For every £2 you earn above £100,000, you lose £1 of your personal allowance. Combined with Scotland's 45% Advanced rate, this creates an effective marginal rate of 67.5% — higher than anywhere else in the UK.
Enter your salary and click Calculate to see your trap impact.
What is the £100k personal allowance trap?
For every £2 you earn above £100,000, you lose £1 of your £12,570 Personal Allowance. By £125,140, it's completely gone. The lost allowance is effectively taxed at your marginal rate, creating a much higher effective rate than the headline 45%.
Why Scotland's trap is worse than England's
| Scotland | England | |
|---|---|---|
| Marginal rate in trap zone | 45% (Advanced) | 40% (Higher) |
| Taper effect | +22.5% | +20% |
| Effective marginal rate | 67.5% | 60% |
| You keep per extra £1 | 32.5p | 40p |
Scotland's 45% Advanced rate (vs England's 40%) makes the trap 7.5 percentage points worse.
How to escape the trap with pension contributions
Pension contributions (including salary sacrifice) reduce your adjusted net income. If you can bring it below £100,000, your full Personal Allowance is restored. On a £120,000 salary, a £20,001 pension contribution restores the full allowance and saves approximately £13,500 in tax — an effective relief rate of 67.5%.
Other ways to reduce adjusted net income
Gift Aid donations, trading losses, and property losses can all reduce your adjusted income for taper purposes. Gift Aid is particularly useful — a £1,000 Gift Aid donation reduces your adjusted income by £1,250 (the gross equivalent), potentially saving you £843.75 in the trap zone.
A SIPP can help you escape the trap. Compare options at Hargreaves Lansdown — the UK's largest investment platform. Compare SIPPs →
See the damage — and the fix. Enter your salary above to see how much the trap costs you and how much a pension contribution would save.
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This calculator provides estimates only and does not constitute financial or tax advice. Always verify with Revenue Scotland, HMRC, or mygov.scot, and speak to a qualified financial adviser for advice specific to your circumstances.