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The 60% Tax Trap Explained: How £100k Earners Can Avoid It (2026/27)
20 January 20256 min readMy Take Home Salary

The 60% Tax Trap Explained: How £100k Earners Can Avoid It (2026/27)

Earning over £100,000 in the UK? You might be paying an effective marginal tax rate of 60% or more. Here is how the Personal Allowance taper works and how to legally avoid it using pension contributions.

The 60% Tax Trap Explained: How £100k Earners Can Avoid It

If you receive a bonus or pay increase taking your annual income over £100,000, you may face an unexpected tax shock: in the UK, income earned between £100,000 and £125,140 is subjected to an effective marginal Income Tax rate of 60% (and up to 62% when National Insurance is included).

This phenomenon is known as the "60% Tax Trap" (or the Personal Allowance Taper). Because the £100,000 threshold has remained frozen without indexation, tens of thousands of professionals fall into this bracket every year.

Here is an explanation of the mathematics behind the trap, verified against statutory HMRC rules, and the most tax-efficient ways to protect your hard-earned pay.

Key Rule (Income Tax Act 2007, s.35)

For every £2 your Adjusted Net Income rises above £100,000, your tax-free Personal Allowance (£12,570) is reduced by £1. It reaches zero exactly at £125,140.

Why Is the Marginal Rate 60%?

HMRC does not publish an official "60% tax band." The 60% effective rate arises from the interaction of two statutory rules:

  1. 40% Higher Rate Income Tax: Any income above £50,270 is taxed at the Higher Rate of 40%.
  2. Loss of Tax-Free Allowance: For every £100 you earn above £100,000, your Personal Allowance shrinks by £50. That £50—which was previously tax-free—is now exposed to the 40% Higher Rate, generating an extra £20 of tax.

The Calculation on £100 of Income:

  • Direct Higher Rate Tax (40% on £100): £40.00
  • Tax on Lost Allowance (40% on £50): £20.00
  • Total Income Tax Paid: £60.00 (60% effective rate)

Factoring in National Insurance:

In England, Wales, and Northern Ireland, employees also pay 2% Class 1 National Insurance on earnings above the Upper Earnings Limit (£50,270). This produces a true marginal deduction rate of 62% on every pound earned between £100,000 and £125,140.

(Note for Scotland: Due to the Scottish Advanced Rate of 45% and Higher Rate of 42%, the effective marginal deduction rate reaches between 67.5% and 69.5%).

When Does the Taper Stop?

The Personal Allowance for 2026/27 is £12,570. It tapers at a rate of 50p per pound until it is completely eliminated:

Taper Limit Formula: £100,000 + (2 × £12,570) = £125,140

  • Income £100,000 to £125,140: 60% effective Income Tax (+ 2% NI = 62%).
  • Income above £125,140: Personal Allowance is zero. Income is taxed at the 45% Additional Rate (+ 2% NI = 47%).

How to Beat the 60% Tax Trap Legally

The taper applies to your Adjusted Net Income (total taxable income minus allowable deductions). By reducing your adjusted net income to £100,000, you recover your full £12,570 Personal Allowance and avoid the 60% rate.

1. Pension Contributions (Salary Sacrifice or SIPP)

Contributing to a registered pension scheme is the most powerful mitigation strategy:

  • Example: You earn £110,000.
    • Take as Cash: You lose £6,000 in Income Tax and £200 in NI on the £10,000 slice above £100,000, keeping just £3,800.
    • Pay into Pension: By sacrificing £10,000 into your workplace pension, your adjusted net income drops to £100,000. You pay £0 tax on that £10,000, and the entire £10,000 goes straight into your retirement fund.
  • Immediate Return: You achieve an effective 60% to 62% tax relief on your contribution.

2. Gift Aid Charitable Donations

Donating to UK-registered charities via Gift Aid also reduces your adjusted net income for taper calculations. If you donate £800 to charity, the charity claims £200 basic tax relief (making the gross donation £1,000), and HMRC reduces your adjusted net income by the full £1,000 gross donation.

Official Sources & Citations

  1. Personal Allowance Taper Rules:
  2. Personal Allowance Threshold Freeze:
  3. Adjusted Net Income Definition:

Verification Notice:

  • Verified figures: £12,570 Personal Allowance, £100,000 taper threshold, £125,140 upper taper limit, and the 40%/45% statutory income tax brackets are 100% verified against current HMRC legislation.
  • Annual Pension Allowance: Ensure your total annual gross pension contributions do not exceed your annual allowance (standard £60,000, tapering down to £10,000 for very high earners with threshold income over £200,000).