Many savers are being hit with unjust tax bills running into thousands of pounds due to errors by HM Revenue & Customs (HMRC). Recent reports reveal that HMRC is mistakenly clawing back tax on savings interest that either doesn’t exist or is protected within tax-free Individual Savings Accounts (ISAs).
Richard Fuller, the Shadow Chief Secretary to the Treasury, criticised the tax authority’s actions, stating, “At a time when many are already struggling with rising taxes and the cost of living, HMRC is wrongly taking money from hardworking people, adding unnecessary financial pressure.”
Financial advisers have uncovered multiple errors, including inflated interest estimates, duplicate charges, and taxation on interest held inside ISAs—accounts specifically designed to shelter savers from such levies. In one striking example, HMRC estimated a saver’s untaxed interest at £3,847, despite the actual figure being just £94.
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Sir Iain Duncan Smith, former Conservative Party leader, condemned HMRC’s approach, saying, “HMRC has operated without sufficient oversight for too long. Their mistakes and intrusive methods have unfairly burdened taxpayers, making them cover the costs of HMRC’s failings. This kind of surveillance isn’t how a public service should function.”
Sarah Weston of the Low Incomes Tax Reform Group added, “Some taxpayers are receiving tax calculations and coding notices showing savings interest figures that don’t align with their own records. These inaccuracies can lead to unexpected tax bills or unwarranted PAYE deductions.”
HMRC responded by assuring the public: “We don’t want anyone to overpay or underpay tax. We update tax codes using the latest data from financial institutions, aiming to receive this information as close to real time as possible. Our processes are continually being improved to correct payments when errors occur. Anyone who believes our records are incorrect should contact us immediately so we can rectify the issue.”