Simple savings Income Tax calculation

An exact bounded annual-liability illustration combining ordinary non-savings and savings income.

Exact bounded savings-liability method

Reviewed · Current · Implementation rule · 6 April 2023 to 5 April 2027

For the reviewed bounded case, allocate the standard Personal Allowance, stack savings above non-savings income, apply the starting and nil rates in order, and preserve exact rational pence.

The calculation requires adjusted net income to equal the two supplied gross income amounts and excludes dividends, other income, reliefs, band extensions and tax deducted at source. It is not PAYE, a complete Self Assessment result or a filing value.

Exceptions and branches

• Dividends, gains, foreign income, trusts, estates and remittance-basis cases are not supported.
• No tax deducted, payment due or filing rounding is calculated.

Assumptions

• Taxpayer regime and statutory adjusted net income are established.
• Only the standard Personal Allowance applies.

Worked examples

• In 2026–27, £15,000 of non-savings income plus £5,000 of savings leaves £2,430 taxable non-savings income after the standard allowance. That leaves £2,570 at the starting rate, then £1,000 at the savings nil rate and £1,430 at 20%: £286 savings Income Tax and £772 total.

• £50,000 of non-savings income plus £1,000 of savings leaves £37,430 taxable non-savings income. The total crosses the main basic-rate limit, so the nil-rate amount is £500. The next £500 is charged at 40%: £200 savings Income Tax and £7,686 total for England and Northern Ireland or Wales.

• For a Scottish taxpayer with the same £50,000 plus £1,000 facts, non-savings tax uses Scottish bands while savings still uses the UK-wide classification and rates. Savings Income Tax remains £200; total Income Tax is £9,182.05.

Sterling preserves each band result as an exact rational number of pence. This bounded illustration is not PAYE, not a complete Self Assessment result, and never invents a filing value. It refuses dividends, other income, reliefs, tax deducted at source and unestablished taxpayer status.

Related concepts

• Savings Income Tax

• Starting rate for savings

• Personal Savings Allowance

• Personal Allowance

• Simple non-savings Income Tax calculation

Linked from

• Savings Income Tax

• Starting rate for savings

• Personal Savings Allowance

Sources

• Income Tax Act 2007, section 12 — Section 12. Primary authority.

• Income Tax Act 2007, section 12A — Section 12A. Primary authority.

• Income Tax Act 2007, section 12B — Section 12B. Primary authority.

• Income Tax Act 2007, section 16 — Section 16. Primary authority.

• Income Tax Act 2007, section 25 — Section 25. Primary authority.

• HMRC Savings and Investment Manual SAIM1090 — Savings and dividend income treated as the highest part of total income. Official guidance.

How sources are ranked

Knowledge version: sterling-knowledge@2026-09-11.7. Last checked 11 September 2026.