UK £100k Tax Trap Calculator
Calculate lost Personal Allowance and the 60% effective marginal tax rate between £100,000 and £125,140 with pension salary sacrifice solutions.
1How to Use UK £100k Tax Trap Calculator
In the UK, earnings over £100,000 trigger a clawback of the tax-free Personal Allowance (£12,570) at a rate of £1 for every £2 earned, creating an effective 60% income tax rate up to £125,140.
- Step 1.Enter your total gross annual employment income in GBP (£).
- Step 2.Enter any existing annual pension contributions made via salary sacrifice.
- Step 3.Review your lost Personal Allowance, effective marginal tax rate, and take-home pay.
- Step 4.See the exact additional pension sacrifice needed to avoid the 60% tax trap.
2Formulas, Methodology & Key Features
UK Personal Allowance Taper Formula
For every £2 your adjusted net income exceeds £100,000, your £12,570 personal allowance reduces by £1, becoming zero at £125,140:
3UK £100k-£125k Tax Trap Benchmark Matrix (£)
| Gross Income (£) | Lost Allowance | Marginal Rate | Tax on Excess (£) | Pension to Fix (£) |
|---|---|---|---|---|
| £105,000 | £2,500 | 62.0% | £3,100 | £5,000 |
| £110,000 | £5,000 | 62.0% | £6,200 | £10,000 |
| £115,000 | £7,500 | 62.0% | £9,300 | £15,000 |
| £120,000 | £10,000 | 62.0% | £12,400 | £20,000 |
?Frequently Asked Questions (FAQ)
Common questions answered about UK £100k Tax Trap Calculator.
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