The £100k Tax Trap: How to Beat the 60% Band in 2026/27

Quick answer

If you earn between £100,000 and £125,140 in 2026/27, you are in the UK's most punishing tax band. For every £2 you earn over £100,000, you lose £1 of your £12,570 personal allowance — which means each extra pound is taxed at 40% and drags a previously tax-free 50p into the 40% net. The result is a 60% effective marginal rate. The good news: this trap is one of the most beatable in the entire tax system, because the figure that triggers it — adjusted net income — is one you can legitimately reduce with pension contributions and Gift Aid.

How the 60% band actually works

The personal allowance is the slice of income you can earn tax-free: £12,570. Once your adjusted net income exceeds £100,000, that allowance is withdrawn at a rate of £1 for every £2 of income above the threshold. It is fully gone by £125,140 (£100,000 + £12,570 × 2).

Walk through a single extra £1 of salary earned at, say, £110,000:

• The £1 itself is taxed at the higher rate, 40% → 40p of tax.
• Earning it also withdraws 50p of personal allowance, which now becomes taxable at 40% → another 20p of tax.
• Total tax on that £1: 60p.

So across the whole £100,000–£125,140 band, you keep just 40p of every extra pound. Add a student loan (Plan 2 at 9%) and you can be over 69%; the marginal rate in this zone is genuinely the highest most people will ever face. Confirm your own figures with the

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Why £125,140 is the magic number

Once income passes £125,140, the personal allowance is fully exhausted, so there is no more to withdraw. From there the marginal rate drops back to the additional rate of 45% — meaning, perversely, that income above £125,140 is taxed more lightly at the margin than income in the £100k–£125,140 band. The trap is the band itself, not high income in general.

The fix: reduce your adjusted net income

The taper is based on adjusted net income, not gross salary. Adjusted net income is your total taxable income minus certain reliefs — most importantly gross pension contributions and Gift Aid donations. Reduce that figure and you reduce or eliminate the taper. This is what makes the trap beatable.

Option 1: Pension contributions

A pension contribution reduces adjusted net income pound-for-pound (on the gross amount). Bring your adjusted net income from £110,000 back down to £100,000 with a £10,000 gross contribution and you achieve two things at once:

1. You get higher-rate relief (40%) on the contribution in the normal way, and
2. You restore £5,000 of personal allowance (the £10,000 reduction undoes £5,000 of taper at 40%).

The combined effect is 60% effective relief: a £10,000 gross pension contribution that reduces your bill and restores allowance costs you only about £4,000 of take-home pay. There is no more efficient way to save into a pension. Model it with the

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Worked example: beating the trap with pension

David earns £110,000 with no other income.

• Without action, £10,000 of his income sits in the 60% band, costing £6,000 in tax on that slice, and he loses £5,000 of personal allowance.
• He makes a £10,000 gross pension contribution (via salary sacrifice, or £8,000 net into a SIPP that's grossed up and the rest reclaimed).
• His adjusted net income falls to £100,000, restoring the full £12,570 allowance.
• Net cost to David's pocket: roughly £4,000 for £10,000 in his pension.

He has effectively been paid £6,000 by HMRC to save for retirement.

Option 2: Gift Aid

Charitable donations made under Gift Aid are grossed up by the charity (your £80 becomes £100) and the gross amount also reduces your adjusted net income. So a donation in this band is subsidised at the same 60% effective rate — give £100 gross and your true cost is around £40. The trade-off versus pension is obvious: the money goes to charity rather than your own pot. But for the charitably inclined, the £100k band is the most tax-efficient time to give. Use the

to see the relief.

The childcare cliff edge — often the bigger prize

For working parents, the £100,000 line is not just about income tax. Crossing it removes:

• Tax-Free Childcare (worth up to £2,000 per child per year), and
• The 15 and 30 hours of funded childcare for eligible working parents.

These are cliff edges, not tapers — earn £100,001 and you lose the lot. For a family with two young children in nursery, the childcare support can be worth far more than the income tax saving. A pension contribution that brings adjusted net income to £99,999 can therefore restore several thousand pounds of childcare help on top of the 60% tax relief, making it one of the highest-return financial moves available to a UK parent. Note the precise eligibility test uses adjusted net income, so model it carefully.

Salary sacrifice: the cleanest tool

The most efficient way to make the pension contribution is salary sacrifice: you formally give up salary in return for an employer pension contribution. Because the sacrificed amount never counts as your pay, you save income tax and National Insurance (8%/2% employee), and your employer saves their 15% NI — a share of which good employers add to your pension. Sacrificing salary down to £100,000 hits the trap, the NI, and the childcare cliff in one move. Compare methods with the

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Watch the annual allowance

There is a ceiling. Pension contributions only get relief up to the £60,000 annual allowance (2026/27), or 100% of earnings if lower, and very high earners face the tapered annual allowance down to £10,000. For someone earning £110,000–£125,000, the standard £60,000 allowance is comfortably enough to escape the trap, and carry forward of unused allowance from the previous three years gives extra headroom if needed. But don't blindly contribute beyond the allowance — that triggers an annual allowance charge that claws the relief back.

What if you can't lock money away?

Pension is the textbook answer, but the cash is locked until at least age 55 (rising to 57 from 2028). If you need liquidity, the options are narrower: Gift Aid helps only if you want to give to charity, and there is no other simple lever that reduces adjusted net income on demand. Some people manage bonus timing — sacrificing a bonus directly into pension before it is paid — to avoid ever receiving income in the trap. If none of these fit, the band is sometimes simply a cost of earning well, but for most people the pension route makes the 60% rate genuinely optional.

The student loan multiplier

If you're still repaying a student loan, the trap is even harsher than the headline 60%. Plan 2 and Plan 5 loans deduct 9% of income above their thresholds, and postgraduate loans add 6% on top. Stack a Plan 2 loan onto the £100k–£125,140 band and your marginal rate hits roughly 69%; add a postgraduate loan and you're keeping barely 25p of each extra pound. For graduates in this band, a pension contribution does triple duty — saving the 60% income-tax effect and reducing the income that the student-loan deduction is calculated on. It's one of the rare situations where reducing your salary genuinely leaves you better off across the board.

Bonus sacrifice: never receiving the income at all

The cleanest way to stay out of the trap is to avoid ever being paid into it. If you're due a bonus that would push you over £100,000, ask whether your employer allows bonus sacrifice — diverting some or all of the bonus straight into your pension before it's paid. Because the bonus never becomes your income, it never enters the taper calculation, you avoid income tax and National Insurance on it, and the full gross amount lands in your pension. This is mechanically the same as salary sacrifice but applied to a one-off payment, and it's especially powerful for people whose base salary sits below £100,000 but whose bonus tips them over. Time it before the bonus is paid — you generally can't sacrifice income you've already received. Model the effect with the

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What about benefits in kind?

Remember that adjusted net income includes more than salary. A company car, private medical insurance, and other taxable benefits in kind all count towards the £100,000 figure via your P11D. Someone on a £96,000 salary with a £6,000 medical and car benefit is already over £100,000 for taper purposes even though their cash pay isn't. Conversely, swapping a cash-heavy package for an electric company car (taxed at just 4% benefit-in-kind in 2026/27) can keep your adjusted net income lower than the equivalent salary would. When you're hovering near the threshold, audit your whole package, not just the payslip — the P11D figures are what tip the balance.

A quick decision framework

If you're in or near the £100k–£125,140 band, work through this order:

1. Identify your adjusted net income — salary plus benefits in kind plus other income, minus existing gross pension and Gift Aid.
2. Check for childcare exposure — if you have children in funded hours or Tax-Free Childcare, getting under £100,000 is usually the top priority because the cliff edge dwarfs the tax.
3. Use salary or bonus sacrifice first — it beats relief-at-source because it also saves National Insurance.
4. Respect the £60,000 annual allowance (and carry forward) so you don't overshoot into an annual allowance charge.
5. Consider Gift Aid for any charitable giving you'd do anyway — it's subsidised at the same 60%.

Run the whole calculation through the

before your pay or bonus is processed, because most of these moves only work before the income is received.

The frozen-threshold backdrop

It's worth understanding why more people keep falling into this trap. The £100,000 threshold has never moved since the personal-allowance taper was introduced in 2010, and the wider income-tax thresholds are frozen until 2028. With wages rising through inflation, "fiscal drag" pulls ever more earners into the £100k–£125,140 band each year — a band that, in real terms, captures incomes that would once have been comfortably below it. This freeze is precisely why the trap has gone from a niche concern for the very well-paid to something affecting senior professionals, experienced managers and dual-income households across the country. If your pay rises are nudging you toward £100,000, the planning in this guide is no longer optional reading — it's the difference between keeping 40p or 100p of your next pay rise. The threshold won't come to you, so you have to plan around it.

A note on the order income is taxed

One subtlety that confuses people: income is stacked in a set order — earnings first, then savings, then dividends — and the personal-allowance taper is driven by your total adjusted net income, not just your salary. So a large slug of savings interest or dividends can be what tips you over £100,000 even if your salary is below it. If you have substantial investment income outside an ISA, it counts. The fix is the same — pension contributions and Gift Aid reduce adjusted net income whatever the source — but it's a reminder to add up everything before assuming you're clear of the trap. Shifting savings and investments into an ISA (£20,000 a year) removes that income from the calculation entirely going forward, which is a quiet but effective long-term defence against drifting into the band.

Putting it all together

The £100k tax trap looks brutal — a 60% marginal rate, lost childcare, a hidden additional levy on success — but it is one of the few traps in UK tax you can sidestep almost entirely. The lever is adjusted net income, and the tools are pension contributions (ideally via salary sacrifice) and Gift Aid. Bring your adjusted net income back to £100,000 and you reclaim your full personal allowance, secure 60% effective relief, and — if you have young children — potentially restore thousands of pounds of childcare support. Run your own numbers with the

and the before your bonus or year-end lands.

This article is general information, not financial advice. Figures use 2026/27 UK rates for England, Wales and Northern Ireland. Consider regulated advice for large pension contributions or tapering.