How much is £30k, £40k and £50k after tax in the UK?

When you read a job advert, the number you see is your gross salary — the headline figure before anything is taken out. What lands in your bank account is your take-home (or “net”) pay, after Income Tax and National Insurance. Let’s walk through three common salaries for 2026/27 so you can see how the gap between gross and net actually forms.

The method in plain English

Two main deductions shrink most salaries:

• Income Tax. Everyone gets a tax-free Personal Allowance of £12,570. Earnings above that are taxed at 20% (basic rate) up to £50,270, then 40% (higher rate) up to £125,140, then 45% above that.
• National Insurance (NI). This is a separate deduction with its own threshold, also broadly starting around £12,570 of annual earnings. The main employee rate applies to earnings above that, with a lower rate on the slice above the higher-rate boundary.

So the trick is simple: take your salary, subtract the tax-free allowance, and apply the right rate to each slice. The figures below are illustrative and rounded — your exact pay depends on your tax code, pension contributions and student loan, but they show the shape of things.

£30,000 a year

At £30k, you sit comfortably in the basic-rate band.

• Income Tax falls only on the £17,430 above your allowance, at 20% — roughly £3,486.
• National Insurance takes a single-digit percentage of earnings above its threshold — very roughly £1,400.

That leaves take-home of around £25,100 a year, or about £2,090 a month. Notice how little tax you actually pay at this level: more than four-fifths of your salary survives.

£40,000 a year

Still basic rate, but a bigger slice is now taxable.

• Income Tax applies to £27,430 at 20% — roughly £5,486.
• National Insurance rises in line with the extra earnings — very roughly £2,200.

Take-home lands near £32,300 a year, or about £2,690 a month. The extra £10,000 of gross salary over the £30k example turns into roughly £600 more per month — a useful reminder that a raise is always worth less than the headline once tax is applied.

£50,000 a year

This is the interesting one, because £50k sits just below the £50,270 higher-rate threshold.

• Almost all your taxable income is still taxed at 20%, so Income Tax is roughly £7,486.
• National Insurance continues at the main rate on most of the extra.

Take-home is around £39,200 a year, or about £3,270 a month. Cross £50,270, though, and every extra pound is taxed at 40% plus higher-rate effects — which is why the jump from £50k to £55k feels far smaller in your pocket than the jump from £40k to £50k.

Why the monthly figure is what matters

Annual salary is great for comparing jobs, but your rent, direct debits and food shop all run monthly. Converting to a monthly net figure does two things:

• It shows what you can realistically commit to — lenders and landlords think in monthly terms too.
• It exposes the “raise illusion.” A £5,000 pay rise sounds transformative, but after tax and NI it might add £250–£290 a month. Still welcome, just not life-changing.

A few things can move these numbers:

• Pension contributions reduce your taxable pay, so you keep more of a raise than the headline rates suggest.
• Student loan repayments kick in above a threshold and act like an extra slice off the top.
• Your tax code can shift your allowance up or down.

The honest takeaway: as your salary climbs, each new band keeps less of every pound. Knowing your real monthly take-home — not the advert figure — is what lets you budget, compare offers and decide whether that promotion is worth the extra hours.

Estimates and general information only — not financial or tax advice. Verify figures with an official source before acting on them.