The £100k Ceiling: How to Escape the UK's 60% 'Hidden' Tax Trap
Written by Suyesh Sharma, FCCA, Founder and Managing Director, Metta Accountants.
Published 25 February 2026
Reaching £100,000 comes with a frustrating realisation: your take-home pay doesn't increase nearly as much as expected. At Metta Accountants, we frequently see high earners falling into the "60% Tax Trap" - a zone of income where every additional £2 earned costs you £1.20 in tax.
What is the 60% Tax Trap?
Due to the Personal Allowance Taper, those earning between £100,000 and £125,140 face an effective tax rate of 60% on every pound earned within that band - 40% income tax plus an effective additional 20% from the loss of the personal allowance.
How the taper works - in plain English
The standard UK Personal Allowance is £12,570. This is the amount you can earn before paying any income tax. Once your Adjusted Net Income (ANI) passes £100,000, HMRC reduces this allowance by £1 for every £2 of income above the threshold. So at £102,000 of income, you lose £1,000 of your personal allowance. By £125,140, the allowance is gone entirely.
The mechanism creates a dual tax hit: you are paying 40% on the additional income, and simultaneously losing tax-free allowance - which generates another 20% tax charge on the allowance that disappears. Combined: 60% effective rate.
A concrete example
Imagine your salary is £110,000. Your Adjusted Net Income is £110,000 - £10,000 above the threshold. HMRC therefore reduces your personal allowance by £5,000, to £7,570. You now pay 40% income tax on £5,000 more than you would have otherwise. That's £2,000 of extra tax, on top of the standard 40% you pay on the £10,000 above £100,000 (£4,000). Total tax on that £10,000: £6,000 - a 60% rate.
It is not just about salary
Adjusted Net Income includes salary, self-employment profits, rental income, savings interest, dividend income - essentially everything before personal reliefs. This means a property investor drawing £80,000 from their day job and £25,000 in rental income is fully in the trap, even if their salary alone would suggest they're not affected. We frequently encounter professionals who are unaware their bonus, rental income, or freelance work has pushed them into this zone.
How to escape it
1. Maximise Pension Contributions
A SIPP contribution or increased workplace pension reduces your Adjusted Net Income directly. Contribute £10,000 on a £110,000 ANI and you bring it back to £100,000 - reclaiming your full Personal Allowance and saving £6,000 in tax on a £10,000 outlay. That is effectively a 60% immediate return, before considering the investment growth inside the pension.
2. Salary Sacrifice Schemes
EV lease schemes (ULEV salary sacrifice), cycle-to-work, buying annual leave, and childcare vouchers (legacy schemes) all reduce your gross taxable pay before it even reaches your payslip. An electric car on salary sacrifice can reduce ANI by £10,000–£25,000 depending on the vehicle, often making it the single most impactful lever available alongside pension contributions.
3. Gift Aid Donations
Charitable donations under Gift Aid extend your basic rate band and reduce your Adjusted Net Income for the purposes of the taper. A £5,000 Gift Aid donation effectively reduces your ANI by £6,250 (the grossed-up amount). For someone charitably inclined, this makes donations extraordinarily tax-efficient in this income band.
4. Defer Income Where Possible
If you are approaching the end of the tax year and a bonus or dividend is discretionary, deferring it to April 6th can push the income into the next tax year. If combined with planned pension contributions in the new year, this can be powerful - though it requires careful cash flow planning.
5. Spousal Transfers and Investment Structuring
Where a spouse or civil partner is a basic rate or non-taxpayer, transferring income-producing assets (rental property, savings accounts, investment portfolios) to them can shift income below the £100,000 threshold. This requires genuine legal transfer and should be done carefully to avoid HMRC challenge.
Don't forget Student Loan Repayments
For many professionals in the trap, Student Loan repayments add a further effective 6–9% tax charge (depending on the plan). Combined with income tax, employee NIC, and the allowance taper, effective marginal rates can theoretically exceed 70% for some individuals between £100,000 and £125,140. Modelling all deductions simultaneously is the only way to get a true picture.
Don't let a promotion become a penalty.
With the 2026/27 tax year here, now is the time to review your projections and put the right structures in place before April.
Suyesh Sharma
Founder & FCCA
Helping high earners and business owners keep more of what they earn through strategic planning.
