Labour has admitted to knowing about a significant income tax miscalculation that has resulted in 8.7 million retirees being overcharged on their state pensions. The error has accumulated a staggering £43.5 million over 12 months and remains unresolved. Pensioners have been overcharged by roughly £5 on average, but the revelation that Labour allegedly knew about the issue for at least a year has sparked outrage.
Pensions Minister Confirms Knowledge
Pensions minister Torsten Bell confirmed that the government had been aware of the issue since at least June last year. He stated: "We have become aware that for a small subset of customers in receipt of the state pension, [there has been] a calculation error." The controversy stems from a mismatch between official HMRC guidelines and the actual data used to determine tax burdens for millions of retirees.
How the Error Occurred
According to HMRC's own regulations, the taxable state pension amount should be based on a single week at the preceding year's reduced rate, followed by 51 weeks at the updated level. This calculation accounts for the brief gap between the launch of a new tax year and the first Monday when increased pension payments take effect. However, HMRC has been overtaxing pensioners by applying the top rate across all 52 weeks, relying on incorrect figures from the Department for Work and Pensions.
The miscalculation is estimated to have affected up to 8.7 million retirees. A former HMRC employee who identified the discrepancy believes the issue may have persisted since the 2023-24 tax year.
Expert Reactions
Tax expert Mike Warburton, who first highlighted the problem in May, described the situation as a serious government failing. He said: "We have two Government departments at odds with each other and potentially the whole pensioner population being overcharged. They've taxed pensioners more than they say the law requires, so it's to the taxpayer's disadvantage. I think HMRC has got itself into a big hole."
Robert Salter, a director at tax advisory firm Blick Rothenberg, noted that many affected individuals would unlikely notice the discrepancy. He commented: "You're going to assume it's correct. Let's be honest, almost nobody is going to double-check that. The bigger issue is that, especially for people on relatively low incomes, this tax matters. It's money you could have spent that HMRC haven't legally got the right to have."
Ongoing Issues and Government Response
Incorrect figures were still appearing on pre-populated tax returns for the 2025-26 tax year as recently as last month. When questioned in Parliament in September last year, exchequer secretary Dan Tomlinson said that "most pensioners pay the right amount of tax in real time" and suggested that "affected individuals can call HMRC to amend any incorrect figures of state pension."
A HMRC spokesman apologized, stating: "We apologise to those affected by this error and are working at pace to fix the issue, although the impact is small with the difference in tax owed being around £5 in most cases." Official sources indicate the problem is expected to be resolved later this summer.
