Frozen Tax Thresholds: The Hidden Pay Cut That's Costing You Hundreds a Year

Why a pay rise might leave you worse off than you think.

What is fiscal drag and why should you care?

Fiscal drag is what happens when tax thresholds stay frozen while your wages rise. You pay tax on more of your income every year, even though the rates themselves haven't changed. The personal allowance (£12,570) and higher-rate threshold (£50,270) have been frozen since April 2022, and the Labour government extended that freeze at the Autumn Budget 2025 to run until April 2031.

In plain terms: for almost a decade, your tax-free allowance stays exactly the same while prices, rents and salaries keep rising. Every small pay rise pushes more of your income across tax boundaries. You might feel like you're earning more, but you're effectively being quietly taxed more each year.

How much is this actually costing you?

If the personal allowance had risen with inflation since 2021, it would be roughly £15,000 today rather than £12,570. That gap means basic-rate taxpayers are paying tax on about £2,430 of income that should have been shielded. The real cost is around £486 per year for basic-rate taxpayers and around £972 per year for higher-rate taxpayers.

Over the full freeze period (2022 to 2031), the cumulative hit for an average earner runs into the thousands. Households in the bottom half of the income distribution are projected to be roughly 0.4% poorer in 2026/27 than they would have been if thresholds had been uprated normally.

Why does it feel worse than a normal tax rise?

Because it's invisible. A headline tax rate change is obvious and makes the news. Threshold freezes quietly pull more people into higher tax bands year after year without a single policy announcement. Someone earning £48,000 this year, getting a 5% pay rise, suddenly has £490 of income taxed at 40% rather than 20%. They never voted for a higher marginal rate, but they're paying one.

Fiscal drag is especially painful for middle-income earners who sit just below the higher-rate threshold. Small pay rises that would normally feel like progress now push you into territory where HMRC takes an extra 20p in the pound on every additional pound earned.

What can you actually do about it?

You can't stop the freeze, but you can reduce the amount of income exposed to it. Pension contributions are the single biggest lever. Money paid into a workplace or personal pension comes off your taxable income, which can pull you back below higher-rate threshold territory or protect your personal allowance. For every £100 that a higher-rate taxpayer moves into their pension, they get £40 of tax relief back.

Salary sacrifice schemes (for pensions, cycle-to-work, electric vehicle leases) reduce your gross salary for income tax and National Insurance purposes. If your employer offers one, using it can be a very efficient way to blunt fiscal drag.

Where do ISAs fit in?

ISAs don't reduce your income tax directly, but they protect everything you earn inside them from dividend tax, savings interest tax and capital gains tax. If frozen thresholds are dragging more of your investment income into taxable territory outside an ISA, moving those investments inside an ISA removes the problem entirely. You can shelter £20,000 per tax year.

The dividend allowance is now just £500 and the capital gains tax allowance is just £3,000 outside an ISA. Both of these allowances have been cut hard in recent years. For anyone with a meaningful portfolio, using the full ISA allowance every year is one of the most effective ways to reduce your exposure to fiscal drag on investment returns.

Should you worry about marriage allowance and other small wins?

Yes, if they apply to you. Marriage Allowance lets one partner transfer £1,260 of their personal allowance to the other, worth £252 per year, if one partner earns below the personal allowance. It's underclaimed and easy to apply for on the HMRC website. Similarly, if you pay pension contributions through relief at source (most personal pensions and SIPPs), higher-rate taxpayers need to actively claim back the extra 20% relief via self-assessment. Many don't.

These small wins add up. If fiscal drag is going to cost you a few hundred pounds a year for the next five years, clawing back £252 from Marriage Allowance or a few hundred from unclaimed pension relief meaningfully offsets the damage.

Where Mona Fits

Mona helps you build an investment habit inside an ISA wrapper, which protects your returns from the worst of the fiscal drag effect. Because your investment growth, dividends and interest inside an ISA are all tax-free, frozen thresholds and shrinking allowances outside an ISA become much less of a problem. The more you use your ISA allowance each year, the less fiscal drag can quietly erode your long-term wealth.

The Bottom Line

Frozen tax thresholds are a stealth tax rise that will continue until 2031. The average basic-rate taxpayer is losing around £486 a year and higher-rate taxpayers around £972. You can't stop the freeze, but you can reduce its impact by maximising pension contributions, using salary sacrifice schemes and sheltering investments inside an ISA. Small allowances like Marriage Allowance and unclaimed pension tax relief are worth chasing. Fiscal drag works slowly, but it compounds, so action taken now saves real money over the remaining freeze years.

Stop letting frozen thresholds quietly shrink your income. Start protecting your wealth inside an ISA with Mona today.

For impartial information and guidance on UK tax, visit MoneyHelper.org.uk.

Join Mona’s early access waitlist

Join the waitlist

All articles

Frozen Tax Thresholds: The Hidden Pay Cut That's Costing You Hundreds a Year

Why a pay rise might leave you worse off than you think.

What is fiscal drag and why should you care?

Fiscal drag is what happens when tax thresholds stay frozen while your wages rise. You pay tax on more of your income every year, even though the rates themselves haven't changed. The personal allowance (£12,570) and higher-rate threshold (£50,270) have been frozen since April 2022, and the Labour government extended that freeze at the Autumn Budget 2025 to run until April 2031.

In plain terms: for almost a decade, your tax-free allowance stays exactly the same while prices, rents and salaries keep rising. Every small pay rise pushes more of your income across tax boundaries. You might feel like you're earning more, but you're effectively being quietly taxed more each year.

How much is this actually costing you?

If the personal allowance had risen with inflation since 2021, it would be roughly £15,000 today rather than £12,570. That gap means basic-rate taxpayers are paying tax on about £2,430 of income that should have been shielded. The real cost is around £486 per year for basic-rate taxpayers and around £972 per year for higher-rate taxpayers.

Over the full freeze period (2022 to 2031), the cumulative hit for an average earner runs into the thousands. Households in the bottom half of the income distribution are projected to be roughly 0.4% poorer in 2026/27 than they would have been if thresholds had been uprated normally.

Why does it feel worse than a normal tax rise?

Because it's invisible. A headline tax rate change is obvious and makes the news. Threshold freezes quietly pull more people into higher tax bands year after year without a single policy announcement. Someone earning £48,000 this year, getting a 5% pay rise, suddenly has £490 of income taxed at 40% rather than 20%. They never voted for a higher marginal rate, but they're paying one.

Fiscal drag is especially painful for middle-income earners who sit just below the higher-rate threshold. Small pay rises that would normally feel like progress now push you into territory where HMRC takes an extra 20p in the pound on every additional pound earned.

What can you actually do about it?

You can't stop the freeze, but you can reduce the amount of income exposed to it. Pension contributions are the single biggest lever. Money paid into a workplace or personal pension comes off your taxable income, which can pull you back below higher-rate threshold territory or protect your personal allowance. For every £100 that a higher-rate taxpayer moves into their pension, they get £40 of tax relief back.

Salary sacrifice schemes (for pensions, cycle-to-work, electric vehicle leases) reduce your gross salary for income tax and National Insurance purposes. If your employer offers one, using it can be a very efficient way to blunt fiscal drag.

Where do ISAs fit in?

ISAs don't reduce your income tax directly, but they protect everything you earn inside them from dividend tax, savings interest tax and capital gains tax. If frozen thresholds are dragging more of your investment income into taxable territory outside an ISA, moving those investments inside an ISA removes the problem entirely. You can shelter £20,000 per tax year.

The dividend allowance is now just £500 and the capital gains tax allowance is just £3,000 outside an ISA. Both of these allowances have been cut hard in recent years. For anyone with a meaningful portfolio, using the full ISA allowance every year is one of the most effective ways to reduce your exposure to fiscal drag on investment returns.

Should you worry about marriage allowance and other small wins?

Yes, if they apply to you. Marriage Allowance lets one partner transfer £1,260 of their personal allowance to the other, worth £252 per year, if one partner earns below the personal allowance. It's underclaimed and easy to apply for on the HMRC website. Similarly, if you pay pension contributions through relief at source (most personal pensions and SIPPs), higher-rate taxpayers need to actively claim back the extra 20% relief via self-assessment. Many don't.

These small wins add up. If fiscal drag is going to cost you a few hundred pounds a year for the next five years, clawing back £252 from Marriage Allowance or a few hundred from unclaimed pension relief meaningfully offsets the damage.

Where Mona Fits

Mona helps you build an investment habit inside an ISA wrapper, which protects your returns from the worst of the fiscal drag effect. Because your investment growth, dividends and interest inside an ISA are all tax-free, frozen thresholds and shrinking allowances outside an ISA become much less of a problem. The more you use your ISA allowance each year, the less fiscal drag can quietly erode your long-term wealth.

The Bottom Line

Frozen tax thresholds are a stealth tax rise that will continue until 2031. The average basic-rate taxpayer is losing around £486 a year and higher-rate taxpayers around £972. You can't stop the freeze, but you can reduce its impact by maximising pension contributions, using salary sacrifice schemes and sheltering investments inside an ISA. Small allowances like Marriage Allowance and unclaimed pension tax relief are worth chasing. Fiscal drag works slowly, but it compounds, so action taken now saves real money over the remaining freeze years.

Stop letting frozen thresholds quietly shrink your income. Start protecting your wealth inside an ISA with Mona today.

For impartial information and guidance on UK tax, visit MoneyHelper.org.uk.

Join Mona’s early access waitlist

Join the waitlist

All articles