Answers · UK 2025/26
Does HMRC automatically know about my savings interest in 2026/27?
Yes. UK banks and building societies report interest paid to HMRC automatically under the Common Reporting Standard. HMRC cross-checks this against your tax return or PAYE record. If untaxed interest exceeds your Personal Savings Allowance, HMRC may adjust your tax code or prompt a Self Assessment return.
Full answer
Under the Common Reporting Standard (CRS) and domestic UK rules, all UK financial institutions automatically report customer interest payments to HMRC each year. This means HMRC receives data on your savings interest without you needing to declare it -- but you are still legally responsible for ensuring the correct tax is paid. **Personal Savings Allowance (PSA) 2026/27** - Basic-rate taxpayer: first £1,000 of savings interest is tax-free. - Higher-rate taxpayer: first £500 of savings interest is tax-free. - Additional-rate taxpayer: no PSA (all interest taxable). **Starting Rate Band for Savings** If your non-savings income (employment, self-employment, pension) is below the personal allowance of £12,570, you may also be eligible for the 0% Starting Rate Band of up to £5,000. This band tapers by £1 for every £1 of non-savings income above £12,570, so it disappears once non-savings income reaches £17,570. **How HMRC collects the tax** For PAYE employees: HMRC adjusts your tax code to collect underpaid tax on excess savings interest in the following tax year. For Self Assessment filers: you must declare all savings interest on your return -- HMRC pre-populates this data from bank reports, but you should verify accuracy. For non-filers with large savings income: HMRC may issue a Simple Assessment bill. **Foreign savings accounts** Under the CRS (120+ countries), overseas banks report UK-resident account holders to HMRC. Do not assume foreign interest is invisible -- it must be declared on a Self Assessment return in the foreign income section. **Practical tip for 2026/27**: With interest rates still elevated, many people have breached the PSA for the first time. Check your annual interest statements from all providers, sum them, and compare against your allowance. If you owe tax and are not in Self Assessment, HMRC should adjust your code -- but verify this happens correctly.
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This answer is informational only and does not constitute financial, tax or legal advice. Figures are for the 2025/26 UK tax year. See our methodology and sources.