HM Revenue & Customs (HMRC) has issued a reminder to pensioners who receive income from savings and investments. Many retirees believe their tax affairs are handled automatically after they stop working. While HMRC often collects tax on smaller amounts of savings interest by adjusting a person's tax code, this automatic system does not apply to higher amounts. Once investment income exceeds the £10,000 threshold, it becomes the individual's responsibility to report it.
According to official guidance, individuals who receive more than £10,000 a year in interest, dividends, or investment income must complete a Self Assessment tax return. This £10,000 figure refers to the actual interest or returns generated within the tax year, rather than the total value of the savings pot or investment portfolio.
Pensioners who exceed this limit must register for Self Assessment to declare the income, as HMRC cannot simply adjust their pension payments to cover the tax owed. Failing to submit a return when required can result in financial penalties.
The HMRC website states: "Self Assessment is a way we collect any tax you owe that can't be collected through your employer. Each year, you'll need to let us know your income by filling in a tax return. You may need to do one if you are self-employed, are in a business partnership, or have to pay Capital Gains Tax on something you sold for a profit."
The guidance adds: "You may also need to do one if you have untaxed income from things like renting out a property, tips and commissions, savings, investments and dividends, or money coming in from another country."
"If you use Making Tax Digital for Income Tax, things work differently from Self Assessment. You should check if the different rules apply to you on GOV.UK," the tax authority notes.
HMRC also advises: "You can send us your online tax return any time between 6 April 2026 and 31 January 2027, but the sooner you do it, the better. If your income from savings and investments is less than £10,000, you don't need to send us a tax return."
Separately, millions of pensioners have been overcharged by HMRC following a system error linked to the annual State Pension increase. When the State Pension rose under the government's triple-lock guarantee, HMRC's systems failed to accurately account for the change. As a result, up to 8.7 million retirees have been overcharged by roughly £5 each on their tax bills, meaning the tax office may have wrongly collected up to £43.5 million over the past year.
HMRC has acknowledged the miscalculation, which affects both those paying via self-assessment and those still working through PAYE. The tax authority says it is working urgently to resolve the issue and expects to implement a fix later this summer.
