The £12,570 Tax Trap: How Frozen Thresholds Are Quietly Pulling More Britons Into Higher Tax Bills

Britain’s income tax rates have not suddenly shot upwards this year. For millions of workers, however, that does not mean their tax burden is standing still.

The reason is a number that has barely moved at all: £12,570.

That is the standard Personal Allowance, the amount most people can earn before they begin paying income tax. It has been frozen at £12,570 for years and, under current government policy, is due to remain there until April 2031.

The higher-rate threshold is also frozen at £50,270 in England, Wales and Northern Ireland.

As wages rise while those thresholds remain stationary, more income becomes taxable and more people cross into higher tax bands.

It is called fiscal drag, and it may be one of the least dramatic ways of increasing the amount of tax collected.

There is no new rate to announce. No percentage point necessarily changes.

Your salary simply moves while the tax line does not.

How the £12,570 Tax Trap Works

Imagine someone receives a pay rise.

Normally, tax thresholds rising broadly alongside inflation would help preserve the amount of income protected from tax. But when the Personal Allowance remains frozen at £12,570, an increasing share of a rising salary sits above it.

The same mechanism operates further up the income scale.

For most taxpayers in England, Wales and Northern Ireland, the basic rate of 20 per cent currently applies between £12,571 and £50,270. Income above £50,270 enters the 40 per cent higher-rate band, while the additional rate applies above £125,140. Scotland operates different income tax bands and rates.

If salaries rise but £50,270 does not, workers who may never have considered themselves particularly high earners can gradually find part of their income taxed at 40 per cent.

That is fiscal drag in practice.

The House of Commons Library defines it as the additional tax generated when thresholds are frozen, pulling more taxpayers into paying tax or into higher rates without the tax rates themselves increasing.

It is quiet by design.

Your payslip may be less impressed.

The Freeze Now Runs Until 2031

This is not speculation about what Chancellor John Healey might announce at the Autumn Budget.

The threshold freeze is already government policy.

Income tax thresholds were initially frozen under the previous Conservative government. At the 2025 Budget, the Labour government extended the freeze for another three years, taking it to April 2031. The policy was subsequently included in the Finance Act 2026.

For the 2026/27 tax year, the standard Personal Allowance remains £12,570 and the higher-rate threshold remains £50,270.

Those numbers are therefore increasingly important as wages continue to change around them.

And the scale of the effect is substantial.

The Office for Budget Responsibility has estimated that the extended threshold freezes will result in millions more people paying income tax or higher rates than would otherwise have done so.

According to the House of Commons Library, the OBR forecasts that by 2030/31 an additional 5.2 million people will be paying income tax, while 4.8 million more will be paying the higher rate compared with a situation in which thresholds were uprated with inflation. Another 600,000 are forecast to enter the additional-rate band.

That is not a niche tax issue.

It is a gradual reshaping of who counts as an income taxpayer and who counts as a higher-rate taxpayer.

A Pay Rise Can Still Leave You Feeling Squeezed

This is where fiscal drag becomes politically difficult.

A worker may receive a salary increase and technically earn more money, yet some of that increase may simply compensate for higher prices.

If frozen thresholds simultaneously push more of that salary into tax, the improvement in disposable income can be smaller than the headline pay rise suggests.

In some cases, workers cross into a higher tax band even though their purchasing power has not increased nearly as dramatically as their nominal salary.

The Institute for Fiscal Studies estimates that the proportion of individuals with enough income to pay income tax could reach 76 per cent by 2030/31, compared with 60 per cent in 2021/22.

This helps explain why fiscal drag can feel particularly uncomfortable for the middle classes.

Someone does not have to suddenly become wealthy to be affected.

They simply need their income to rise faster than a threshold that is not moving at all.

The £50,270 Line Matters Too

The focus on the £12,570 Personal Allowance can obscure another important number: £50,270.

For taxpayers in England, Wales and Northern Ireland, that is where the 40 per cent higher income tax rate begins.

It too is due to remain frozen until April 2031.

That matters particularly for experienced professionals whose salaries have gradually climbed into the £40,000s and £50,000s.

A teacher progressing through salary scales, a middle manager receiving annual increases or an experienced professional negotiating inflation-related pay rises may gradually approach a tax bracket that once appeared comfortably distant.

This does not mean their entire salary suddenly becomes taxed at 40 per cent. Only the relevant income above the threshold is subject to the higher rate.

But it does mean more workers become higher-rate taxpayers.

The Commons Library says the proportion of taxpayers paying the higher or additional rates is forecast to increase from 15 per cent in 2021 to 24 per cent by 2030/31.

That is a significant shift in the shape of Britain's income tax system.

Pensioners Are Being Pulled In Too

Fiscal drag is not exclusively a problem for people receiving salaries.

Pensioners can also be affected.

The Personal Allowance applies to taxable pension income, and the IFS notes that older people have experienced particularly significant real-terms reductions in the value of their tax-free allowance over the past decade.

As pension incomes increase while the Personal Allowance remains frozen, more retirees can find themselves paying income tax.

Again, nothing dramatic has to happen.

The threshold simply waits for their income to catch up with it.

Why This Matters Before the Autumn Budget

Healey enters the 28 October Budget under pressure to provide households with “breathing space” while maintaining fiscal discipline.

That makes frozen thresholds politically significant even if the Chancellor announces no new income tax increase.

The government already has a mechanism generating additional revenue as earnings rise.

And unlike a dramatic increase in the basic or higher rate, fiscal drag accumulates gradually.

That does not make it invisible forever.

Prime Minister Andy Burnham has already acknowledged the political sensitivity of frozen thresholds, saying earlier this year that the issue was repeatedly raised with him by voters.

The question for the government is whether that concern eventually outweighs the revenue the freeze provides.

The Quiet Tax Rise Is Already Here

Budget speculation naturally focuses on what Healey might change next.

Capital gains tax. Pensions. Property. Allowances.

But households should not overlook what has already been decided.

The Personal Allowance is £12,570. The higher-rate threshold is £50,270. Under current policy, both remain frozen until April 2031.

That means millions of people do not need the Chancellor to increase an income tax rate for their tax bills to rise.

Their wages can do the work for him.

That is what makes fiscal drag politically potent. It does not arrive with the drama of a new tax announcement. There is no giant number on the Treasury's Budget graphics and no obvious moment when everyone feels the change at once.

Instead, it happens payslip by payslip.

One salary increase.

One threshold crossed.

One taxpayer at a time.

Britain's quiet tax rise is not waiting for the Autumn Budget.

It is already happening.