Why do people earning £100,000 face a 60% effective tax rate?

Between £100,000 and £125,140 the Personal Allowance is withdrawn by £1 for every £2 earned. Losing that allowance while also paying 40% on the income creates an effective marginal rate of around 60% on that band.

● 2026/27 · Basic · Higher · Additional

Income Tax Calculator

Q: How much Income Tax will I pay on £50,000 in 2026/27?

On a £50,000 salary you pay Income Tax of about £7,486 in 2026/27 — that is 20% on the £37,700 of income between £12,570 and £50,270, with the first £12,570 covered by your Personal Allowance.

Q: At what salary do you start paying 40% tax?

The higher 40% rate applies to taxable income above £50,270 in 2026/27. Below that, income is taxed at the basic 20% rate, and your first £12,570 is tax-free under the Personal Allowance.

How much Income Tax will you actually pay? Enter your income and see it split across the 20%, 40% and 45% bands — with the tax-free Personal Allowance and its £100,000 taper handled for you.

🧾 Band-by-band breakdown 📉 £100k taper included 📅 2026/27 HMRC rates

Calculate your Income Tax

England, Wales & Northern Ireland · 2026/27

Total annual income

Pension contribution (relief-at-source) optional, per year

Income Tax for 2026/27

£0

effective rate 0% ·

Band	Taxed at	Tax
Personal Allowance	£0	£0
Basic rate (20%)	£0	£0
Higher rate (40%)	£0	£0
Additional rate (45%)	£0	£0
Total Income Tax		£0

Income Tax only — this figure excludes National Insurance. See your full deductions with the take-home calculator.

The 2026/27 Income Tax bands explained

UK Income Tax is charged in slices. You don’t pay one flat rate on everything — instead, each portion of your income falls into a band and is taxed at that band’s rate. Crucially, moving into the higher-rate band does not mean all your income is taxed at 40%; only the part above £50,270 is.

Band	Taxable income (2026/27)	Rate
Personal Allowance	£0 – £12,570	0%
Basic rate	£12,571 – £50,270	20%
Higher rate	£50,271 – £125,140	40%
Additional rate	Over £125,140	45%

The £100,000 trap. Between £100,000 and £125,140 you lose £1 of Personal Allowance for every £2 you earn. Combined with the 40% rate, that creates an effective marginal rate of around 60% on this band — one of the strongest arguments for pension contributions if you earn in this range.

A worked example: £55,000 income

Here’s how the calculator arrives at the tax on a £55,000 salary:

The first £12,570 is covered by the Personal Allowance — no tax.
The next £37,700 (£12,571 to £50,270) is taxed at 20% = £7,540.
The remaining £4,730 (£50,271 to £55,000) falls in the higher band at 40% = £1,892.
Total Income Tax: £9,432.

That’s an effective rate of about 17% — far lower than the 40% “tax bracket” headline, because most of the income is taxed at 20% or not at all.

How to legally reduce your Income Tax

Several reliefs reduce your taxable income before the bands are applied:

Pension contributions — the most powerful lever, especially around the £50,270 and £100,000 thresholds. Use the field above to model the effect.
Gift Aid donations — extend your basic-rate band, useful for higher-rate taxpayers.
Marriage Allowance — lets a non-taxpayer transfer £1,260 of allowance to a basic-rate spouse.

Income Tax FAQs

How much Income Tax will I pay on £50,000 in 2026/27?

About £7,486. Your first £12,570 is tax-free, and the £37,700 between £12,570 and £50,270 is taxed at 20%. National Insurance is charged separately on top.

At what salary do you start paying 40% tax?

The higher 40% rate kicks in on taxable income above £50,270. Only the income above that line is taxed at 40% — everything below is still taxed at 20% or covered by your allowance.

Why do people earning around £100,000 face a 60% effective rate?

Between £100,000 and £125,140 your Personal Allowance is withdrawn by £1 for every £2 of income. Losing the tax-free allowance while paying 40% creates an effective marginal rate near 60% in that band.

Does this include National Insurance?

No — this tool shows Income Tax only so you can see the bands clearly. For tax and NI together, use the take-home pay calculator or the NI calculator.