Quick Read
- HMRC fixed a nine-year-old error in its online state pension forecast tool on February 12, 2026.
- The flaw led to inflated forecasts for up to 800,000 Britons who had “contracted out” of the additional state pension.
- Individuals reaching pension age after April 2029 were particularly affected, risking retirement savings shortfalls.
- The UK tax authority apologized for the difficulties and advised users to wait until February 14, 2026, for accurate forecasts.
- Affected individuals can make lump sum payments of up to £907 per missing year to top up National Insurance contributions.
LONDON (Azat TV) – HM Revenue and Customs (HMRC) has announced the rectification of a significant nine-year-old flaw in its online state pension forecast tool, issuing an apology to approximately 800,000 Britons whose retirement planning was jeopardized by inaccurate estimates. The long-standing error, which provided inflated state pension forecasts, primarily affected individuals who had previously opted out of the additional state pension scheme, leaving many at risk of a substantial payment shortfall upon retirement.
The UK tax authority confirmed that the fix was implemented on February 12, 2026, following a system update designed to improve accuracy. This crucial development comes after government ministers were first alerted to the problem in 2017 and a detailed investigation into the service, notably spurred by coverage from publications like The Telegraph.
Understanding the HMRC State Pension Error
The core of the issue lay in how HMRC’s online forecast tool handled records for individuals who had ‘contracted out’ of the State Earnings-Related Pension Scheme (Serps), which was the additional state pension. This arrangement, now abolished, allowed millions of workers to redirect a portion of their National Insurance contributions into a private or workplace pension instead of the state scheme. Consequently, upon retirement, a deduction from their final state pension was applied to account for these contracted-out periods.
However, the online forecast tool, launched in February 2016, two months before the new state pension system began, failed to accurately reflect these deductions. This meant that up to 800,000 people, particularly those due to reach state pension age after April 2029, were incorrectly informed that they had accumulated sufficient National Insurance contributions to qualify for the maximum state pension payment. This misrepresentation could have led individuals to believe they did not need to make additional contributions, only to discover a lower actual payment later.
Impact and Rectification Efforts
The scale of the error is considerable, with approximately 360,000 incorrect estimates already having been issued within the tool’s first three years of operation by 2019. The delay in implementing a comprehensive fix for all affected groups, despite ministers being aware of the problem since 2017, has drawn criticism.
In response to the rectified flaw, an HMRC spokesman expressed apologies for the difficulties users had experienced. The update now correctly accounts for contracted-out periods, ensuring that forecasts are accurate. To qualify for the full new state pension, individuals must accumulate 35 complete years of National Insurance contributions, currently valued at £230.25 weekly.
For those affected by the historic inaccuracy, HMRC has outlined a path to address potential shortfalls. Individuals can make lump sum payments of up to £907 per missing year to top up their National Insurance records. This provision aims to mitigate the financial impact on those who relied on the previous, incorrect forecasts.
Expert Reaction and Future Implications for Pension Forecasts
Sir Steve Webb, a former pensions minister now affiliated with consultancy LCP, highlighted the gravity of the situation, warning that the error had placed people at risk of retirements ‘built on sand.’ He welcomed HMRC’s updates, emphasizing the importance of accurate state pension forecasts for sound financial planning.
The incident underscores the critical role of government bodies like HMRC in providing precise and reliable information, especially concerning vital public services and entitlements such as state pensions. The prolonged nature of the error, despite early warnings, points to challenges in system updates and communication within such large organizations. The fix, while belated for some, aims to restore confidence in the online tool and ensure that future retirees can plan their finances with greater certainty.
The resolution of this nine-year-old error by HMRC is a significant step towards restoring public trust in government financial tools, highlighting the imperative for accurate data management in critical public services.

