Individuals with £4,000 or more in savings accounts may be hit with an unexpected tax bill from HMRC due to automatic detection of interest earned, which can exceed the Personal Savings Allowance. Banks automatically report interest to HMRC, which may then adjust a person’s tax code or send a letter if tax is owed. Basic-rate taxpayers can earn up to £1,000 in interest tax-free, while higher-rate taxpayers can earn only £500 and those earning £125,140 or more get no allowance. Because interest from fixed-term accounts can be paid in one lump sum when the account matures, even savings as low as £4,000 at 5% over several years could exceed the £500 allowance in a single tax year, potentially triggering a tax charge.
