The £56 Billion Stealth Tax: How Frozen Thresholds Are Quietly Emptying Your Wallet

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The Mechanism

No Chancellor has stood at the despatch box and said, "I am raising income tax." They did not need to. Since April 2021, the government has simply stopped moving the goalposts — and let inflation do the work instead.

This is fiscal drag. Wages rise. Thresholds stay still. More of your income falls above the tax-free line. More of it tips into the higher-rate band. Your tax bill goes up. The rate on your payslip stays identical.

The Office for Budget Responsibility describes it plainly: "fiscal drag raises significant sums as the average effective tax rate rises more quickly over time." The mechanism requires no legislation to change tax rates. It requires only inaction.

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The Timeline: Three Chancellors, One Policy

March 2021 — Sunak starts the freeze.

Rishi Sunak announced that the personal allowance would rise to £12,570 in April 2021 — and then stay there until 2026. The higher-rate threshold would be fixed at £50,270 over the same period. The OBR projected at the time the move would create 1.3 million new income taxpayers and one million more higher-rate taxpayers. Sunak called it "a progressive way to raise money." It was also invisible on every pay packet in the country.

Autumn Statement 2022 — Hunt extends to 2027-28.

Jeremy Hunt added two more years. A four-year freeze became a six-year freeze. The OBR's March 2023 Economic and Fiscal Outlook updated its estimate: the combined measures would raise £29.3 billion per year (1.0% of GDP) by 2027-28. On HMRC's own ready reckoners, that is the equivalent of a 4p rise in the basic rate of income tax — except nobody called it that. The OBR also noted that the six-year freeze would take the real value of the personal allowance in 2027-28 back to its 2013-14 level.

Autumn Budget, November 2025 — Reeves extends to 2030-31.

Rachel Reeves had pledged in her first Budget in 2024 that the freeze would not be extended beyond 2028. She broke that pledge. In the November 2025 Autumn Budget, thresholds were extended for a further three years to April 2031. The OBR estimated the extension alone would raise £8.0 billion in 2029-30 and contribute to around 780,000 more basic-rate and 920,000 more higher-rate taxpayers by 2029-30 compared to the March forecast. In total, counting all the freezes from 2022 to 2031, the policy now yields £56 billion per year by 2030-31.

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The £56 Billion Number: What It Means

The OBR's November 2025 forecast confirmed that changes to income tax covering the freezes at the basic, higher and additional rates are forecast to yield a total of £56 billion in 2030-31. AJ Bell translates that to roughly £1,300 per taxpayer on average per year.

To put it another way: by the time the freeze ends, the government will be collecting the equivalent of having raised the basic rate of income tax by 4p — without ever announcing a rate rise.

The OBR's earlier 2023 analysis showed the annual yield at £29.3 billion by 2027-28. Reeves' three-year extension added another £12 billion on top of what was already baked in, pushing the total far beyond what either Sunak or Hunt originally projected.

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How Many People Are Being Pulled In

The scale of fiscal drag is larger than any Chancellor originally admitted:

• 5.2 million additional people will become income taxpayers across the full freeze period (2022-23 to 2030-31), according to the OBR.
• 4.8 million more people will be paying the 40% higher rate by 2030-31. When the freeze was first announced in 2021, the OBR projected just one million more higher-rate taxpayers. The actual number is nearly five times that. As AJ Bell's Laura Suter noted: "The tax freeze has dragged almost three times more people into the higher rate band than was originally expected."
• 600,000 more additional-rate taxpayers (45% on incomes above £125,140) will be created across the freeze period.
• By 2030-31, nearly one in four taxpayers will pay some tax at the higher rate, up from 15% in 2021-22, per the OBR.
• Since 2021, over 8.3 million people are now paying higher or additional rate tax — a 45% increase — according to AJ Bell's analysis of HMRC data.

The higher-rate threshold was supposed to protect the merely-well-paid from the same marginal rate as top earners. It no longer does. A nurse, a teacher, an experienced IT worker — all can find themselves in the 40% bracket without any of them being, by any reasonable measure, a "high earner."

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The Invisible Tax: Why This Is Worse Than a Rate Rise

A declared tax rise is legible. It appears in a Budget headline. Journalists cover it. Voters process it. Politicians are accountable for it.

A threshold freeze does none of that. It shows up in a higher tax deduction on a payslip, with no line saying "frozen threshold surcharge." The BBC described it as a "stealth tax" precisely because "it is not immediately apparent on your payslip, unlike an increase in the nominal tax rates."

The policy is also structurally regressive in its application. A 4p rate rise would be applied to all income above the threshold proportionally. But the freeze hits different income levels differently depending on where they sit relative to the frozen thresholds. Someone who crosses from basic to higher-rate tax during the freeze period faces an effective cliff: their marginal rate jumps from 20% to 40% at a point that used to be further away. That cliff did not move to find them. They walked into it because wages rose and the threshold did not.

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The Cost Per Person

AJ Bell's analysis of the Reeves extension alone (the three years from 2028 to 2031 that Labour added) shows:

• Someone earning £15,000 today: £259 extra over three years
• Someone earning £45,000 today: £683 extra over three years
• Someone near or above the higher-rate threshold: £1,292 extra over three years

These figures are on top of the tax increases already absorbed during the Sunak and Hunt freeze years. AJ Bell's cumulative analysis showed that a worker earning £50,000 at the start of the freeze in 2021 would pay close to £15,000 more in income tax over the full period (to 2028) than they would have under inflation-linked thresholds.

Without any freeze, the OBR estimates the personal allowance would have reached £17,470 by 2030-31. The higher-rate threshold would stand at £70,370 — more than £20,100 higher than the frozen £50,270. Instead, both figures are locked where they were set in 2021.

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Who Gets Hit First: Young and Low-Income Workers

The freeze does not discriminate, but it punishes entry-level earners in a specific, immediate way.

The personal allowance — the amount you earn before you pay any income tax — sits at £12,570. The National Living Wage for over-21s is £12.71 per hour. According to LITRG, from April 2026, minimum wage workers will start paying income tax after working around just 20 hours a week — 20 hours multiplied by 50 weeks produces £12,710, which clears the frozen £12,570 threshold.

The Institute for Fiscal Studies noted that even a part-time worker earning minimum wage for 18 hours a week will become subject to income tax.

At the other end of the entry-level spectrum: someone who graduated in 2021 and has since received modest pay rises has likely spent their entire working life so far in a system where threshold freezes have silently consumed part of every pay increase. They have never experienced a tax system where thresholds tracked inflation. By 2031, that will have been true for a decade.

The LITRG's Joanne Walker was direct: "Extending the personal allowance freeze to April 2031 will mean more people on lower incomes are brought into tax as earnings rise and thresholds stay put. From April 2026, workers earning the minimum wage will start to pay some income tax on their earnings after working around just 20 hours a week."

The full new state pension is expected to exceed the personal allowance in 2027-28, meaning pensioners relying solely on the state pension will begin paying income tax.

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The Political Arithmetic

The attraction of this mechanism for any Chancellor is obvious. You do not break a manifesto pledge not to raise income tax rates. You do not announce a tax rise. You simply do nothing, and the revenue accumulates.

Rachel Reeves is not the inventor of the trick. She inherited a policy with 2021 fingerprints. But she has now owned it twice: first by keeping the Sunak-Hunt freeze through her first Budget, and second by extending it in November 2025 — after explicitly stating she would not. As AJ Bell's Laura Suter put it: "The income tax freeze is now firmly the 'Reeves Freeze'."

The OBR's November 2025 EFO projects the UK's tax-to-GDP ratio reaching an all-time high of 38.3% of GDP in 2030-31. Around two-thirds of the increase in the tax take since 2019-20 comes from rising personal taxes — primarily threshold freezes. The freeze is not a marginal instrument. It is the primary fiscal tool of two successive governments.

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What Comes Next

Thresholds are currently expected to start rising again from April 2031. There is no guarantee of that. There was no guarantee before November 2025 either.

If thresholds had tracked CPI since 2021, a basic-rate taxpayer would be protected by a personal allowance worth roughly £15,700 today. Instead, it is £12,570 — and will remain there until at least 2031. The £56 billion annual yield is not a projection from a theoretical worst case. It is the OBR's central forecast for what the Treasury collects as a direct result of that gap.

This is the policy. The numbers are in the record.

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