Savings interest does not always require a Self Assessment return. Add the relevant interest across accounts and check the allowance and reporting route for your circumstances. If you already file, give the accountant the required interest details even where a bank also reports them.
Add up the relevant interest
Gather annual interest statements from the accounts concerned, including accounts you closed. Use the tax year, not an arbitrary twelve-month period. Tell the accountant about joint accounts and different types of savings rather than assuming every payment has the same treatment.
HMRC’s current guidance explains the allowances and reporting routes. If you already complete Self Assessment, savings interest should be included in the return as required. People outside Self Assessment may have tax collected another way.
Do not infer the position from one bank
Several small amounts can add up, while income and tax bands can affect the calculation. An account being described as a savings account does not mean all interest is exempt. Explain any tax-free account status to the accountant.
Check before buying
Use HMRC’s guidance or ask for the filing requirement to be confirmed. If the only issue can be dealt with without a return, do not assume a full SA engagement is necessary.
Example: several accounts
If interest comes from three banks, prepare one schedule showing each institution and the relevant annual amount. Include closed accounts. Do not use only the balance shown in your main banking app.
Is all interest tax-free because I have an allowance?
Not necessarily. Allowances depend on the person’s wider position and the type of income or account. A return may need the information even where the resulting tax on some interest is nil.
If the bank reports interest, why tell the accountant?
The return still needs to be complete. Give the accountant the statements and explain any joint-account share. A change in a PAYE tax code should also be checked rather than assumed to match the correct year’s final liability.
Next step: Share the relevant interest statements and other income details with TaxSimba if you need a return or want the position reviewed within an agreed service.
Check the allowance and the reporting route separately
The Personal Savings Allowance is £1,000 for basic-rate, £500 for higher-rate and £0 for additional-rate taxpayers. Unused Personal Allowance and the starting rate for savings can also matter. Interest above an allowance can be taxable without automatically requiring a new tax return.
HMRC says savings interest over £10,000 must be reported on Self Assessment. For smaller amounts, tax can often be collected through a code or Simple Assessment; someone already filing includes the required interest on the return. Follow HMRC’s current instructions and any notice, especially where the bank information is wrong or incomplete.
Savings interest and where you live
The UK savings-income rules apply in Scotland and Wales too. Tell the accountant your taxpayer status and wider income so the correct allowance and reporting position can be checked.
Add the interest across relevant accounts
Illustrative preparation example.
Collect annual interest statements for each relevant account, including accounts outside the main bank. Keep the account type and gross interest identifiable. A bank reporting information to HMRC does not ensure the accountant has the complete figures for your return.
Check: Which accounts are included, and which interest belongs in the reporting calculation?
| Check | Practical action |
|---|---|
| Do the figures cover the UK tax year? | Use annual statements and include closed accounts. |
| Are any accounts joint or tax-free? | Record the account type and relevant ownership share. |
| Is Self Assessment actually required? | Check current HMRC reporting rules alongside other income and any notice to file. |
Does every interest-tax bill require Self Assessment?
No. HMRC may collect tax another way depending on the facts. Check before purchasing an annual-return service solely for interest.
Can I ignore interest below an allowance when I already file?
Give the accountant the relevant statements so the return and allowance calculation can be completed correctly.
Download a checklist for this guide
- List all accounts, including closed ones.
- Collect interest certificates for the tax year.
- Identify joint-account shares and ISAs.
- List other income affecting allowance calculations.
- Check HMRC's required reporting or collection route.