What Your UK Pay Rise Is Really Worth After Tax & NI

A pay rise feels like a clean win, but the headline number on your offer letter is never what reaches your bank account. Income Tax, National Insurance, and possibly a student loan all take a slice of every extra pound before you see it. In some income bands the deductions are so steep that a rise barely moves your take-home at all. This guide from the SafeToSpend team breaks down what actually lands in your pocket, using 2025/26 thresholds for England, Wales and Northern Ireland (Scotland has its own bands).

The basic maths of a marginal pound

The key idea is the marginal rate: the combined deductions on each extra pound, not your average across the whole salary. Most of your existing pay is taxed at lower rates; the rise sits on top, in your highest band. For 2025/26 the main figures are:

Band (taxable income)	Income Tax	Employee NI
Up to £12,570 (personal allowance)	0%	0% up to £12,570
£12,571 – £50,270 (basic rate)	20%	8%
£50,271 – £125,140 (higher rate)	40%	2%
Above £125,140 (additional rate)	45%	2%

So a basic-rate earner keeps roughly 72p of each extra pound (20% tax plus 8% NI gone). A higher-rate earner keeps about 58p, because tax jumps to 40% while NI drops to 2%. A £2,000 rise that looks generous on paper might add only around £1,160 to a higher-rate earner's annual take-home.

Add a student loan

If you are repaying a student loan, another 9% comes off income above your plan threshold (6% on the postgraduate loan). Plan 2 repayments, for example, typically start at around £28,470 a year. Someone on Plan 2 with an undergraduate loan effectively loses an extra 9p in the pound, so a higher-rate earner with a loan keeps closer to 49p of each extra pound.

The 60% trap between £100,000 and £125,140

This is the band that surprises people most. Once your adjusted net income passes £100,000, your £12,570 personal allowance is withdrawn by £1 for every £2 you earn above it, disappearing entirely at £125,140. That withdrawal means an extra slice of income becomes taxable that previously was not, on top of the 40% you already pay.

The result is an effective marginal rate of around 60% on income in that band (62% once 2% NI is added). Add a 9% student loan and you can be keeping barely 29p of each extra pound. A £5,000 rise from £100,000 to £105,000 might leave you with under £2,000 of it.

Earning between £100,000 and £125,140 can mean the taxman keeps more of your rise than you do.

Reclaiming the value with salary sacrifice

You cannot rewrite the tax bands, but you can sometimes step out of the worst of them. With pension salary sacrifice, you agree to give up part of your gross salary and your employer pays it into your pension instead. Because the money never counts as your income, it escapes Income Tax and both employee and employer National Insurance.

In the 60% trap, this is unusually powerful. Sacrificing enough to bring your adjusted net income back to £100,000 restores your full personal allowance. For someone at £105,000, redirecting £5,000 into a pension can mean around £3,000 of relief on a £5,000 contribution — the money is still yours, just locked away until retirement. Salary sacrifice also helps protect benefits like tax-free childcare, which is lost above £100,000.

• Check the sacrifice does not drop your cash pay below the National Minimum Wage — employers cannot allow that.
• A lower gross salary can affect mortgage affordability assessments and life-cover multiples.
• Personal pensions get tax relief too, but only salary sacrifice saves the NI as well.

FAQ

Will a pay rise ever leave me worse off overall?

Almost never in cash terms — you still keep something from each extra pound. But the loss of means-tested benefits, such as tax-free childcare above £100,000, can occasionally mean a small rise costs more than it adds. Salary sacrifice is the usual fix.

Does National Insurance work like Income Tax bands?

Broadly, but the rates move in the opposite direction at the top. NI is 8% in the basic band and falls to 2% above £50,270, which is why higher-rate income loses 40% tax but only 2% NI.

Do these figures apply in Scotland?

Income Tax rates and bands differ in Scotland, with more bands and different thresholds. National Insurance and student loan rules are UK-wide, but check Scottish rates for the tax element.

The practical takeaway is to think in marginal terms before celebrating a rise. Work out which band the extra money lands in, factor in any student loan, and watch the £100,000 cliff edge closely. A quick conversation with your payroll or pension provider about salary sacrifice can turn a disappointing net rise into a genuinely worthwhile one.

This guide is general information from the SafeToSpend editorial team (NexoraOS) and is not financial advice. Figures and rules change — check the current position before acting.