1. Include accounts closed during the year
Create a list of banks, building societies and other savings providers, including accounts closed or transferred during 2025/26. Record the holder names, account reference, currency and whether the product is tax exempt. Keep full account details in your secure records, not an initial website enquiry.
Request annual interest certificates or statements covering the tax year. A current account balance or a quoted annual rate does not show the actual interest for the return.
2. Reconcile the certificate to the schedule
Use columns for provider, gross interest, any tax deducted, ownership share and evidence reference. Investigate differences between a calendar-year statement and a tax-year certificate. Flag fixed-term products, restricted access or unusual payment terms where the year of taxation needs review.
Illustration: three individually owned taxable accounts show £420, £310 and £270 interest. Their combined total is £1,000, not three separate allowance tests. This is a record-reconciliation example, not a client case or a final tax calculation.
3. Check joint accounts and exemptions
HMRC normally splits joint-account interest equally between account holders. If that does not reflect the correct treatment, obtain advice and raise the difference with HMRC rather than choosing an allocation for convenience. Retain ownership evidence.
Keep ISA interest and other exempt products separately identified. Not every product from a familiar provider is exempt. Overseas interest needs a separate residence, currency and relief review: see our foreign-income records guide.
4. Apply allowances after establishing the income
The Personal Savings Allowance depends on your Income Tax band: £1,000 for basic-rate taxpayers, £500 for higher-rate taxpayers and nil for additional-rate taxpayers. Interest itself is included when establishing the band. Unused Personal Allowance and the separate starting rate for savings may also be relevant, depending on other income.
Do not deduct an assumed allowance from each account certificate before giving the records to your adviser. Provide the full taxable interest figures so the calculation can apply the correct rules across your income.
5. Compare HMRC figures with actual records
Banks report interest to HMRC, but taxpayers already completing Self Assessment must report relevant savings interest on the return. Compare the actual annual figures with HMRC correspondence. A current tax-code estimate is a forecast, not necessarily the amount for the completed year.
Keep coding notices and tax calculations with the return papers. Ask for discrepancies to be reconciled rather than reducing the interest figure because extra PAYE has been deducted. If no return is currently required, check the reporting route separately; exceeding an allowance does not always mean Self Assessment is the only collection method.
Prepare a clear return enquiry
Tell us the approximate number of accounts, whether any are joint or overseas, and whether HMRC has issued a notice or calculation. We arrange a secure route for supporting evidence after agreeing the scope.
Personal tax services start from £400. UA Tax serves clients in London and across the UK. Get in touch for a scoped quote. Tax treatment depends on your full circumstances.
For advice on your own circumstances, see our savings interest return preparation service and agree the scope before acting.
Official sources and further reading
These primary sources support the framework above. Check the current version before acting because tax law and HMRC guidance can change.