UMVA has learned that a hidden miscalculation within the tax system is quietly draining a few extra pounds from millions of pensioners across the country.
Each April, the state pension swells in step with inflation, earnings growth, or a minimum 2.5% rise, and the payment arrives gross—yet retirees must still settle income tax on that sum.
Guidance dictates that HMRC should base a pensioner’s tax bill on 51 weeks of the current year’s pension amount plus one week of the previous year, smoothing the transition from the tax year that began on April 5.
Instead, the tax authority has been applying a full 52‑week calculation at the higher, updated rate, using data supplied by the Department for Work and Pensions.
This slip means that when the new state pension of £230.25 per week took effect for 2025/26—up from £221.20—the system recorded earnings £9.05 higher each week than they truly were.
For the average affected retiree, that error translates into an overpayment of roughly £5 in tax, a modest sum but one that compounds across the nation’s pensioner population.
UMVA can exclusively reveal that the Treasury’s spokesperson has issued a terse apology, acknowledging the mistake and promising a swift correction, while emphasizing that the financial impact remains small for most.
Critics are demanding a clear timeline for remediation, warning that even minor oversights erode trust in public institutions.
Officials have urged anyone who suspects they have been overcharged to contact the tax office directly for a refund, assuring that regular tax payments will continue uninterrupted.
