The full marginal rate curve - 2026/27
UK effective marginal rate by income band - 2026/27 (England)
Effective marginal UK rate (income tax + NI + relevant clawbacks) by income band. The 60% trap is the dominant spike - dwarfing the additional-rate band above £125k. For HICBC-affected families, the £60-£80k band reaches 52-67% depending on number of children.
The five UK marginal-rate spikes - detail
Spike 1: HICBC band (£60,000 - £80,000)
For households claiming Child Benefit, the High Income Child Benefit Charge claws back the benefit £-for-£ between £60,000 and £80,000 of ANI. Effective rate impact: roughly 5-15% on top of the underlying 42% rate (=47-57% combined), scaling with number of children. For a family of 4 children, the marginal rate in this band approaches 62%.
Spike 2: The 60% trap (£100,000 - £125,140)
The Personal Allowance tapers by £1 for every £2 earned above £100,000, completely removing the £12,570 PA at £125,140. Combined with 40% income tax and 2% NI in this band, the effective marginal rate is 62% (or 67% in Scotland under the advanced-rate band). This is the single steepest tax-rate spike in the UK system.
Spike 3: Tax-Free Childcare cliff (£100,000 per parent)
Tax-Free Childcare and 30 free hours childcare are LOST entirely if either parent earns above £100,000 ANI. For families with under-5s in nursery, this cliff edge can add £8,000-£12,000/year of "tax" on the £1 that crosses £100,000 - producing effective marginal rates above 100% on that single pound.
Spike 4: Additional rate (£125,140+)
Above the 60% trap, the rate "falls" to 47% (45% additional + 2% NI) - relatively benign by comparison. But Scotland’s top rate of 48% from £125,140 (49% with NI) keeps higher earners punished.
Spike 5: Pension Annual Allowance taper (£260,000+ adjusted income)
The £60,000 pension Annual Allowance tapers above £260,000 of adjusted income, down to £10,000 floor at £360,000+. Contributions above the tapered AA face an Annual Allowance Charge - relieved at marginal rate, then taxed at marginal rate. Effective additional cost: 5-15% on the relevant income slice depending on contribution patterns.
Why the 60% trap dominates
It’s the steepest rate, applies to a wide enough band (£25,140) to affect significant amounts, and catches large numbers of UK professionals - typically late-career middle-managers, City and tech workers, NHS consultants, and senior civil servants.
The pension salary sacrifice "escape" is the single most valuable financial move available to UK higher earners in this band - £10,000 contribution typically saves £6,200+ of combined tax/NI on the way in.
How to cite this data
Calculate your marginal rate
The marginal tax rate calculator shows exactly which marginal rate spike applies at your income level - and how much you save by escaping it via pension contributions.
Open the marginal rate calculatorMethodology + sources
- Income tax bands from gov.uk Income Tax
- Class 1 NI rates from gov.uk National Insurance
- HICBC framework from gov.uk High Income Child Benefit Charge
- Personal Allowance taper at £100,000-£125,140 per Section 35 ITA 2007
- Tax-Free Childcare and 30 hours childcare eligibility from gov.uk childcare costs
- Pension Annual Allowance taper from gov.uk Annual Allowance
Figures assume single earner, England residency, no student loan, basic-rate pension contributions only. Scottish, multi-earner, HICBC and student-loan combinations can produce different rates - see our marginal rate calculator.
Other UK Tax Drag hero data assets
How UK Tax Drag holds itself to account
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