The state pension tax trap is the squeeze created by a State Pension that keeps rising under the Triple Lock while the income tax Personal Allowance stays frozen at £12,570. In 2026/27, the full New State Pension pays £12,547.60 a year, leaving just £22.40 of tax-free room before any other income becomes taxable. From April 2027, forecasts suggest the pension itself will overtake the allowance, so even a pensioner with no other income would technically owe tax.
Why the Gap Has Closed
Two policies are pulling in opposite directions. The Triple Lock guarantees the State Pension rises each year by the highest of average earnings growth, inflation, or 2.5%. The Personal Allowance has been frozen at £12,570 since April 2021.1UK Parliament. Fiscal Drag: An Explainer The pension climbs; the threshold doesn’t.
This is fiscal drag. The government doesn’t raise tax rates; the fixed threshold does the work by pulling more people into the tax system each April. The number of pensioners paying income tax has risen from around 6.7 million in 2021/22 to an estimated 8.8 million in 2025/26.
The 2026/27 Numbers
The full New State Pension rose by 4.8% in April 2026, from £230.25 to £241.30 per week.2GOV.UK. Over 12 Million Pensioners to Receive £575 State Pension Boost Annualised, that’s £12,547.60. Set against a Personal Allowance of £12,570, the tax-free buffer is £22.40 for the whole year.3GOV.UK. Income Tax Rates and Personal Allowances
In practice, any additional income tips you over. A small amount of savings interest, a modest workplace pension, or a bit of part-time earnings will all generate an income tax bill. This applies most directly to people who reached State Pension age after 5 April 2016 and receive the New State Pension. Those on the older Basic State Pension have more headroom on the state payment alone but often close the gap through SERPS, State Second Pension, or workplace pensions.
How Long the Freeze Runs
The Personal Allowance freeze was originally set to run to April 2026. It was extended to April 2028 in the 2022 Autumn Statement, and the October 2025 Budget extended it again to April 2031.1UK Parliament. Fiscal Drag: An Explainer By the time it lifts, the threshold will have stayed fixed for a decade.
Analysis by pensions consultancy LCP projects the New State Pension will reach approximately £12,578 by April 2027, exceeding the Personal Allowance for the first time. At that point a pensioner with no other income at all would owe tax on the excess. It would only be a few pounds, but the mechanics are what matter: the state itself will start withholding tax on income it has just paid out.
How HMRC Actually Collects the Tax
The Department for Work and Pensions pays your State Pension gross, with no tax deducted.4UK Parliament. Taxation of State Pension HMRC collects any tax owed through one of two routes.
If you also receive a private or workplace pension, HMRC adjusts your PAYE tax code so that your pension provider deducts enough extra tax to cover the liability on both incomes combined. You’ll see a smaller net payment from the private pension, and a coding notice explaining why.5GOV.UK. Tax Overpayments and Underpayments
If the State Pension is your only income and it exceeds the threshold, HMRC uses Simple Assessment. After the tax year ends, you’ll receive a letter showing what you owe. If it arrives before 31 October, payment is due by the following 31 January; if it arrives on or after 31 October, you have three months from the date on the letter.6GOV.UK. Pay Your Simple Assessment Tax Bill You have 60 days from the date of the letter to challenge the calculation. Ignoring the bill leads to interest charges and eventual debt collection.
Ways to Reduce What You Pay
You can’t refuse the State Pension increase, but several reliefs and choices can keep more of your income out of tax.
Marriage Allowance
If you’re married or in a civil partnership, one of you earns below £12,570, and the other pays basic rate tax, the lower earner can transfer £1,260 of unused Personal Allowance to their partner. That saves the couple up to £252 a year.7GOV.UK. Marriage Allowance: How It Works Claims can be backdated up to four years, potentially recovering up to £1,008. It’s widely underclaimed and free to apply for.
Move Savings Into an ISA
Interest from ordinary savings accounts counts toward your taxable income, which is exactly the sort of small addition that tips pensioners over the threshold. Interest inside an ISA is tax-free and doesn’t count as income. The annual ISA subscription limit is £20,000, and there’s no cap on the total held across years. For someone sitting on the edge of the allowance, this is often the single most effective move.
Personal Savings Allowance
Basic rate taxpayers can earn up to £1,000 of savings interest a year tax-free under the Personal Savings Allowance, on top of the Personal Allowance.8GOV.UK. Tax on Savings Interest It drops to £500 for higher rate taxpayers. It won’t stop you becoming a taxpayer in the first place, but it protects modest savings income once you’re over the threshold.
Time Private Pension Withdrawals
If you have a defined contribution pension and control when you draw from it, spreading withdrawals across tax years can keep each year’s total income inside a lower band. Taking a large lump sum in a year when you’re already near the threshold is where people get caught, sometimes pushed into the higher rate unnecessarily. The 25% tax-free lump sum from a private pension doesn’t count toward taxable income, so drawing that portion first in the early years of retirement can help.