Stealth Tax: Frozen Tax Thresholds to 2031 and Fiscal Drag Explained

You haven't had an Income Tax rate rise - yet millions of people are paying more tax every year, and millions more are being dragged into higher tax bands for the first time. The cause is the long freeze on tax thresholds, now extended to April 2031, a policy widely nicknamed the "stealth tax". Here's how it works, who it hits, what it's quietly costing you, and the legitimate ways to fight back.

What is the "stealth tax"?

Normally, tax thresholds - like the £12,570 tax-free Personal Allowance and the £50,270 point where the 40% higher rate begins - rise each year with inflation. When they're frozen instead, your pay rises but the thresholds don't, so a bigger slice of your income falls into tax, and more of it falls into higher bands. The government collects more without ever announcing a rate increase. That's why it's called a stealth tax: the rates on paper are unchanged, but the effective tax take goes up.

This effect has a technical name: fiscal drag. As wages "drag" people across frozen thresholds, the tax base widens automatically.

The thresholds are frozen until 2031

At the Autumn Budget 2025, the freeze on the main Income Tax and National Insurance thresholds was extended by a further three years, to April 2031. For 2026/27 that means:

These figures have been stuck since the freeze began and are now set to stay put for years more. You can see exactly how they apply to your salary with our income tax calculator, or check your take-home at a specific salary with the salary calculator - £50,000 is now right on the edge of the higher-rate band.

How much is the freeze really costing?

According to the Office for Budget Responsibility, freezing thresholds to 2030/31 is projected to raise over £55 billion a year by the end of the period - making it one of the single biggest revenue raisers in the tax system. The human side of that number:

• An estimated 5.2 million more people will be paying Income Tax than if thresholds had risen with inflation.
• Around 4.8 million more people will be pulled into the 40% higher-rate band.

For an individual, the cost shows up quietly. If your pay rises 4% a year but the £50,270 threshold doesn't move, more of each pay rise is taxed at 40% rather than 20%. Over several years, a worker who would never previously have been a higher-rate taxpayer can find a chunk of their income taxed at 40% - without any change in the law's headline rates.

Who is hit hardest?

Fiscal drag affects almost everyone, but some groups feel it most:

• Workers near £50,270, who tip into the 40% band and also start to lose perks like the full Personal Savings Allowance.
• Pensioners, whose State Pension keeps rising under the triple lock while the £12,570 allowance stays frozen - pushing some into paying tax for the first time. (See our separate guide via the State Pension forecast tool.)
• Anyone getting modest pay rises, which increasingly just keep pace with inflation while pushing them across frozen lines.

There's also a brutal quirk above £100,000, where the Personal Allowance tapers away, creating an effective 60% marginal rate on income between £100,000 and £125,140 - a trap the freeze leaves firmly in place.

Am I being dragged into the higher-rate band?

The simplest way to know is to look at your marginal rate - the tax and National Insurance you pay on your next £100 of salary. If you're just below £50,270, even a small pay rise will start taxing part of your income at 40%. Our salary calculator shows your marginal rate and take-home for any salary, and the National Insurance calculator breaks down the NI side. Watching your marginal rate year on year is the clearest sign fiscal drag is catching you.

Legitimate ways to beat fiscal drag

You can't change the thresholds, but you can change how much of your income is exposed to them:

• Pension contributions. Paying into a pension reduces your taxable income and can keep you below the £50,270 higher-rate threshold - one of the most effective and tax-efficient moves available. It also reclaims Personal Allowance if you're near £100,000.
• Salary sacrifice. Sacrificing salary for pension or other benefits cuts both Income Tax and National Insurance. See the effect with our salary sacrifice calculator.
• Use ISA and Personal Savings Allowances so your savings and investment income don't add to the squeeze. (Note: the ISA rules are changing from 2026/27.)
• Spread income with a spouse where assets are jointly held, using both sets of allowances and bands.
• Claim everything you're entitled to - Marriage Allowance, work expenses and reliefs all reduce taxable income.

Why a pay rise can leave you barely better off

One of the most demoralising effects of fiscal drag is that a hard-won pay rise can deliver far less than it appears. If a rise pushes part of your income over £50,270, that slice is taxed at 40% rather than 20%, and you may also lose half of your Personal Savings Allowance overnight. Combined with National Insurance, the marginal "take" on that extra income can be much higher than your headline tax band suggests. It's why some people just over the threshold feel they're running to stand still - and why understanding your marginal rate (the tax on your next pound) matters more than your average rate. Before accepting extra hours or a bonus, it's worth checking what you'll actually keep: our income tax calculator and salary calculator show the take-home on any figure, so there are no nasty surprises in your payslip.

Will the freeze ever end?

On current policy, the thresholds are frozen until April 2031, after which they're scheduled to rise with inflation again - though future governments could extend or unfreeze them. Until then, fiscal drag will keep doing its quiet work: more taxpayers, more higher-rate payers, and a rising tax take with no change to the headline rates. The best defence is to understand where you sit relative to the frozen thresholds and use the legitimate reliefs that keep your income below them.

Worked example: how fiscal drag bites over five years

Consider someone earning £48,000 today, just below the £50,270 higher-rate threshold, who gets a 4% pay rise each year. If the threshold rose with inflation too, they'd largely stay a basic-rate taxpayer. But because it's frozen:

• Year 1: salary £48,000 - still under £50,270, all basic rate.
• Year 2: salary ≈ £49,920 - still just under the threshold.
• Year 3: salary ≈ £51,917 - now over £50,270, so the slice above is taxed at 40%.
• Year 5: salary ≈ £56,150 - nearly £6,000 of income taxed at 40% instead of 20%, costing an extra ~£1,180 a year in tax compared with an inflation-linked threshold.

None of this required a Budget announcement or a rate change - the freeze did the work silently. You can watch the same effect on your own salary by checking your take-home and marginal rate on the salary calculator as your pay rises, or by comparing fixed points such as £50,000 year on year.

How the freeze affects different incomes

Wherever you sit, the remedy is the same in principle: reduce your taxable income through legitimate reliefs so less of it crosses the frozen lines. Pension contributions are the most powerful lever, which is why pensions and salary sacrifice feature so heavily in any fiscal-drag conversation.

How big is the stealth tax, really?

The reason the freeze raises so much money is simple arithmetic over a long period. Normally the personal allowance and higher-rate threshold rise a little each year. Freezing them from the early 2020s all the way to April 2031 is close to a decade without inflation uprating. Over that time, wages typically rise by a third or more, but the tax-free and basic-rate bands stay exactly where they are - so the share of national income taken in tax climbs year after year. Independent forecasters have described the freeze as one of the single biggest revenue-raising measures in modern memory, pulling millions of extra people into income tax and into the higher rate.

What makes it politically attractive - and personally costly - is that nobody ever votes for a higher rate. The headline numbers (20%, 40%) never change, so the increase is almost invisible on a payslip. But the effect on your take-home pay is just as real as a rate rise would be, and arguably more insidious because it compounds quietly every year you get a pay rise.

The marginal rate traps to know about

Frozen thresholds create several "marginal rate traps" - points where earning a bit more is taxed far more heavily than your headline rate. The first is at £50,270, where you move from 20% to 40% income tax (and your savings allowance halves and your National Insurance changes). The second, and harshest, is between £100,000 and £125,140, where the withdrawal of the personal allowance creates an effective 60% rate on that slice of income. A third affects families through the High Income Child Benefit Charge between £60,000 and £80,000. Because all these thresholds are frozen, more people drift into them every year.

The practical lesson is that a pay rise near one of these points can be worth far less than it appears, and that pension contributions are unusually powerful in these bands. Putting £1 into a pension when you are in the 60% trap can effectively cost you just 40p of take-home pay, because it restores personal allowance as well as giving tax relief. Knowing where the traps sit lets you make deliberate choices - for example asking for a benefit such as extra pension instead of a cash rise that would mostly be taxed away.

A worked walkthrough near the higher-rate threshold

Consider Hannah, who earns £49,500 and is offered either a £2,000 pay rise or a £2,000 employer pension contribution. If she takes the cash, part of it crosses £50,270 and is taxed at 40% with 2% NI, so her take-home gain is noticeably less than £2,000. If she takes the pension contribution, the whole £2,000 goes into her pension untaxed, and she stays under the higher-rate threshold, protecting her savings allowance too. For someone focused on long-term wealth rather than immediate cash, the pension route is often the better deal in a frozen-threshold world - and the salary sacrifice calculator shows the difference clearly.

A simple yearly checklist

Once a year - ideally before the tax year ends on 5 April - it is worth doing three quick checks. First, work out whether a pay rise has pushed you close to £50,270 or £100,000, using the income tax calculator. Second, decide whether a pension top-up makes sense to stay under a threshold. Third, make sure any spare savings or investments are inside ISAs, where their income is invisible to these frozen bands. These three habits are the most effective everyday defence against fiscal drag.

Frequently asked questions

What is fiscal drag in simple terms?

Fiscal drag is when frozen tax thresholds don't rise with your pay, so as wages increase more of your income is taxed - and more is taxed at higher rates - even though the tax rates themselves haven't changed.

How long are tax thresholds frozen?

The Personal Allowance and higher-rate threshold are frozen until April 2031 following the extension announced at Autumn Budget 2025.

How do I know if I'll become a higher-rate taxpayer?

If your income is approaching £50,270, you're at risk. Use our income tax calculator and watch your marginal rate on the salary calculator as your pay rises.

How can I avoid the 40% band?

Pension contributions and salary sacrifice are the main legitimate tools - both reduce your taxable income and can keep you below the higher-rate threshold. Try the salary sacrifice calculator to see the effect.

Sources: House of Commons Library - Fiscal drag explainer, Freezing the personal allowance and higher-rate threshold, and GOV.UK - Income Tax rates and allowances. Figures reflect the 2026/27 tax year and OBR projections.