Pensioners do not have a separate savings-tax regime. The same three layers apply to everyone: any unused Personal Allowance, the starting rate for savings, and the Personal Savings Allowance. What makes retirement different is that State Pension and private pension income can use most or all of the first two layers before bank interest is added.
Why State Pension changes the answer
The State Pension is taxable income, although DWP pays it without taking tax off. For 2026/27, the full new State Pension sits very close to the £12,570 standard Personal Allowance. That means a pensioner receiving the full amount may have very little unused Personal Allowance left for private pension income or savings interest.
Add all taxable pension income before testing the savings allowances. Use the pension tax calculator for State Pension, private pension and other recurring income, then use the tax on savings interest calculator for the separate savings layers.
The three tax-free layers for savings interest
1. Unused Personal Allowance
If pensions and other non-savings income do not use the full Personal Allowance, the remainder can cover savings interest. A person with a smaller State Pension and no private pension may therefore receive some interest tax-free before the savings-specific allowances are needed.
2. Starting rate for savings
The starting rate can cover up to £5,000 of interest at 0%. It is reduced by £1 for every £1 of non-savings income above the Personal Allowance and disappears once that other income reaches £17,570 under the standard allowance.
This layer is particularly relevant to lower-income retirees. It is often missed because higher pension income removes it entirely.
3. Personal Savings Allowance
The Personal Savings Allowance depends on the highest Income Tax band reached after interest is added:
| Tax band | Personal Savings Allowance |
|---|---|
| Basic rate | £1,000 |
| Higher rate | £500 |
| Additional rate | £0 |
Interest inside an ISA does not use any of these allowances and is not included in the calculation.
How HMRC collects the tax
Banks and building societies report interest to HMRC. If a pensioner has a private or workplace pension taxed through PAYE, HMRC will commonly adjust that pension’s tax code to collect tax due on both State Pension and savings interest. Someone already filing Self Assessment reports the interest there.
HMRC says people with more than £10,000 of savings and investment income need to register for Self Assessment. If tax is due and there is no PAYE pension or employment source, HMRC will tell the taxpayer how to pay after receiving the bank’s information.
A practical order for checking your position
- Add annual State Pension, private pension and other taxable income.
- Check how much Personal Allowance remains.
- Reduce the £5,000 starting-rate band by non-savings income above the allowance.
- Add interest to determine the correct Personal Savings Allowance tier.
- Exclude ISA interest and tax only the amount left above the available 0% layers.
For a one-off pension withdrawal, run the pension lump sum tax calculator first because the taxable portion can move interest into a different band.