The 60% tax trap: why £100k–£125k is the worst place to earn

If you earn between £100,000 and £125,140, every extra £1 you’re paid is taxed harder than it would be on a £200,000 salary. It’s the best-known kink in the UK tax system, it isn’t in any headline rate table, and it’s entirely fixable.

Where the 60% comes from

Everyone starts with a personal allowance of £12,570 — income you pay no tax on. But once your adjusted net income passes £100,000, the allowance is withdrawn at £1 for every £2 above the line. By £125,140 it’s gone completely.

That withdrawal is the trap. In the taper zone each extra £100 of pay costs you:

£40 — higher-rate tax on the £100 itself
£20 — because £50 of personal allowance is lost, and that £50 is now taxed at 40%
£2 — employee National Insurance

That’s 62p in every £1, against 47p for someone on £150,000. In Scotland the same mechanics run through the 45% advanced rate, so the taper zone costs 69.5p in every £1 — see the Scottish version of the trap. Add a Plan 2 student loan and a graduate in England keeps just 29p of each extra £1 — the maths is in student loans and the tax traps.

What it costs in practice

On a £110,000 salary you’re £10,000 into the zone: £5,000 of allowance is gone and the taper alone costs £2,000 a year on top of normal tax. By £125,140 the taper’s full cost reaches just over £5,000 a year.

And if you have children, the same £100,000 line also detonates the childcare cliff — which is a cliff, not a taper, and usually costs far more.

The fix: get your income back under £100,000

Adjusted net income is measured after pension contributions, whichever way you pay them. Salary sacrifice, net-pay workplace schemes and relief-at-source SIPP contributions all reduce it £1 for £1 of gross contribution.

So a £110,000 earner who puts £10,000 into their pension:

restores the full personal allowance,
gets 40% relief on the whole contribution,
and (with salary sacrifice) saves 2% NI as well.

The effective cost of that £10,000 of pension is roughly £3,800 of take-home. You’re moving money you’d keep 38p of into a pot that holds 100p of it. Even without children, clearing the taper is usually the highest-return saving decision available to anyone in the zone. If part of the money arrives as a bonus, bonus sacrifice does the same job.

The calculator below is preloaded with the £110,000 scenario — put in your own salary and it will show the exact contribution that clears the taper and what each £1 of pension really costs you.

Try your own numbers

About you

Where you liveSets tax bands and childcare rulesGross salaryAnnual pay before tax or any deductions — the headline figure on your contract, not what lands in your bankTaxable benefits in kindP11D value: company car, private medical… Counts towards the £100k tests. 0 if noneVariable bonus (maximum)The most you might get this year if targets are hit. 0 if nonePension contributionGross annual amount landing in the pensionHow it's paidAlso saves NI and student loan — the cheapest routeStudent loanPostgraduate loan

Your household

Partner with incomeChildrenAnnual childcare spendWith registered providersValue of 30 free hoursWhat you'd pay without them

Which student loan plan am I on?

It depends on where you lived when you took the loan out, and when your course started:

Northern Ireland — always Plan 1, whatever the year.
Scotland — always Plan 4 (loans applied for through SAAS).
England — Plan 1 before Sept 2012, Plan 2 from 2012 to July 2023, Plan 5 from Aug 2023.
Wales — Plan 1 before Sept 2012, Plan 2 after (Wales doesn't use Plan 5).
Postgraduate loan — English or Welsh master's/doctoral loans only; it repays alongside your main plan. Scottish and NI postgrad loans repay through Plan 4 / Plan 1 instead.

Still unsure? Your repayment plan is shown when you sign in to your student loan account on gov.uk.

The fix

Sacrifice £10,000 into your pension

Clear the £100k cliff (childcare support + personal allowance taper). Each £1 landing in your pension costs you just 38p of today's money — about £317 a month less take-home for £833 a month into your pension.

Kept value = take-home pay + child benefit kept + childcare support with no pension contribution, for your household in England, 2026/27 tax year. Contributing moves you left; salary sacrifice lands exactly on the curve, net-pay and relief-at-source land slightly off it (NI and student loans don't fall).

Per year	No pension
Take-home pay	£72,357
≈ per month	£6,030
Income tax	£33,432 £2,786/mo
Employee NI	£4,211 £351/mo
Child benefit kept	£0
Childcare support	£0
Total kept value	£72,357

More guides

The £100k childcare cliff: how £1 of pay can cost you £8,000

Earn £100,001 and you lose free childcare hours and Tax-Free Childcare in full — a hard cliff, not a taper. What it costs a parent of two and the exact fix.

Keep your child benefit: beating the £60k–£80k charge

The High Income Child Benefit Charge claws back 1% of your child benefit per £200 over £60,000. What it's worth, who's tested, and how salary sacrifice keeps it.

Bonus sacrifice: turn a 62%-taxed bonus into pension at full value

A bonus that lands in the £100k–£125k zone keeps you 38p in the pound — or less with children. Exchanging it into your pension before payday keeps 100p.

Student loans and the tax traps: the 51%–71% graduate rates

Plan 1, 2, 4, 5 and postgraduate loans add 6–15% to your marginal rate — and they stack with the child benefit charge and the 60% taper. The 2026/27 thresholds and what actually reduces them.

Scotland's £100k trap: 69.5% marginal tax, but no childcare cliff

Scottish taxpayers face a harsher personal allowance taper — 67.5% plus NI — but Scotland's universal funded hours mean the £100k childcare cliff is much shallower. The 2026/27 bands and what changes.

2026/27 tax year, childcare with registered providers. Your nation sets the income tax bands (Scotland's six-band schedule vs rUK) and the childcare rules: England and Wales lose free hours over £100k, Scotland's funded hours are universal, Northern Ireland has Tax-Free Childcare only. Child benefit is charged on the household's higher earner, and childcare support needs both parents under £100k. This is a modelling tool, not financial advice — check your own position with HMRC or an adviser.