How is the starter rate for savings calculated in 2025/26?

The starter rate gives you up to £5,000 of savings interest at 0%, but only if your non-savings income (salary, self-employment, pension) is below £17,570. The band tapers: every £1 of non-savings income above £12,570 reduces the available starter band by £1, ending at £17,570 where it is fully exhausted.

Are gilts taxed the same as bank interest?

Yes — coupon (interest) on UK gilts is taxed as savings interest using the PSA and starter band. However, gilt capital gains are exempt from CGT, making low-coupon gilts attractive to higher-rate taxpayers who can hold them outside an ISA and harvest the capital appreciation tax-free.

Does cashback on a current account count as savings interest?

No — bank account cashback is generally treated as a discount on banking services and is not taxable income. However, the regular monthly 'rewards' paid by some accounts (e.g. £5/month for fulfilling conditions) may be classified as savings interest with PSA treatment, or as miscellaneous income, depending on the product wording. HMRC generally accepts the bank's classification.

Can I claim back overpaid savings tax from previous years?

Yes — you can claim a refund for the current and four previous tax years. Use form R40 (or the online equivalent) to claim refunds where bank interest was reported but you were within your PSA. Many pensioners are owed small refunds because their tax code overcollects.

How does the PSA interact with self-assessment?

If your savings interest is below £10,000 and within your PSA, you generally do not need to file. If interest exceeds £10,000 or you owe tax above the PSA, you must register for self-assessment by 5 October following the tax year (so 5 October 2026 for 2025/26).

Are NS&I products tax-free?

Some are — Premium Bonds (prizes are tax-free, no PSA used), the Direct Saver and Income Bonds are taxable using the PSA, fixed-rate Issue savings certificates are tax-free, and Index-Linked Certificates (closed to new) are tax-free. Always check the specific product's tax treatment on the NS&I website.

Does redundancy pay affect my savings tax band?

Redundancy pay above £30,000 is taxed as employment income and adds to your total income — potentially halving or eliminating your PSA in the year of redundancy. Spreading the redundancy across two tax years (where contractually possible) can preserve more of the PSA.

Why did my tax code change after I earned bank interest?

HMRC reads bank interest reports each year and adjusts the next year's tax code to collect any underpaid PSA tax. The adjustment shows as a deduction labelled 'untaxed interest' or 'savings interest'. You can opt to pay the lump sum instead by contacting HMRC.

Savings Interest Tax Calculator UK 2025/26

Savings interest tax method (UK 2025/26)

HMRC stacks UK savings interest after non-savings income (salary, pension, self-employment) and before dividend income. The order matters because each band fills up sequentially:

Personal Allowance (£12,570) covers non-savings income first.
Starter rate for savings band — 0% on up to £5,000, tapered down by £1 for each £1 of non-savings income above £12,570.
Personal Savings Allowance — £1,000 / £500 / £0 depending on which final tax band you end up in (after everything is stacked).
Remaining interest is taxed at 20% inside the basic rate band, 40% inside higher rate, and 45% above £125,140.

One subtle trap: your tax band is determined after stacking interest on top of other income. If a £700 interest bonus pushes you from £49,800 to £50,500, your PSA shrinks from £1,000 to £500 retrospectively — costing 40% × £200 = £80 of unexpected tax on the cusp.

Another trap is the £100,000 personal allowance taper. Each £2 of total income above £100k removes £1 of Personal Allowance. A high earner whose interest pushes them through this band faces an effective marginal rate of 60% — 40% income tax plus 40% on the lost £1 of PA which is now taxed.

Difference between PSA, starter rate, and ISA

The three savings tax shelters work in different ways and are commonly confused:

Personal Savings Allowance — a 0% slice within your normal tax bands. Only available on interest from non-ISA accounts. Halves at higher rate, disappears at additional rate.
Starter rate for savings — a 0% band of up to £5,000 for low non-savings earners. Tapered away £-for-£ between £12,570 and £17,570 of non-savings income. Almost always relevant only to retirees, students, and parents on parental leave.
ISA — a fully tax-exempt wrapper. Up to £20,000 per person per year can be paid in. Interest, dividends, and gains inside the ISA are permanently tax-free, do not appear on self-assessment, and never use your PSA, starter rate, or AEA.

Stacking order: starter rate first (uses any spare £5k), then PSA (free £1k/£500), then taxable at 20/40/45%. ISAs sit completely outside this stack.

Three worked examples (UK 2025/26)

Example 1: Basic-rate saver with £900 interest

Lewis earns £40,000 and has £25,000 in a 3.6% notice account producing £900 of interest. Total income £40,900, firmly in basic rate, so PSA = £1,000. Starter band: £0 (non-savings income too high).

Calculation: £900 interest is fully covered by the £1,000 PSA — £0 tax due. Lewis has £100 of unused PSA in 2025/26.

Example 2: Edge-of-bands trap at £50,270

Sandra earns £49,800 and receives £700 of bond interest. Stacking: £49,800 + £700 = £50,500 → tips into higher rate. PSA halves to £500.

Calculation: £700 − £500 PSA = £200 taxable. Of that, £470 falls in basic rate (up to £50,270) and £230 in higher rate. So: £470 × 0% (within PSA — wait, PSA already used). The taxable £200: £200 sits at the higher-rate threshold so it's taxed at 40% = £80. Compare to staying under £50,270: she'd have £1,000 PSA, taxable £0. The cliff edge cost £80 on £200 of taxable interest = effective 40% marginal rate at this boundary.

Example 3: Pensioner with starter rate + PSA

David, age 68, has State Pension of £11,973 and £4,000 of savings interest from £80k in a 5% bond. Non-savings income £11,973 — below £17,570 so starter band partially available.

Calculation: PA absorbs £11,973 of pension; £597 of PA remains. Starter band: £17,570 − £11,973 = £5,597, but capped at £5,000. PSA: £1,000. So tax-free: £597 (remaining PA) + £5,000 (starter) + £1,000 (PSA) = £6,597 against £4,000 interest. Tax due £0. David could comfortably take another £2,597 of interest before paying any tax.

Common mistakes to avoid

Forgetting that the PSA shrinks to £500 once your total income (including the interest itself) crosses £50,270 — high-rate banding.
Assuming peer-to-peer lending interest counts inside an ISA — only IF ISAs (Innovative Finance) qualify; ordinary P2P platforms do not.
Treating ISA interest as part of your PSA — ISA interest is fully exempt and never uses your £1,000/£500 allowance.
Believing children's savings interest is exempt — under the £100 parental settlement rule, interest above £100/parent is taxed on the parent.
Forgetting partner's savings — couples can split balances to use both PSAs (£1,000 + £1,000 = £2,000 tax-free at basic rate).
Missing the starter rate for savings — £5,000 at 0% if non-savings income is below £17,570, often overlooked by retirees.

When to use this calculator

Run this calculator before opening any new fixed-rate bond or notice account, because the interest is taxed in the year it pays out — long-term bonds can bunch interest into one tax year. Use it after any salary change, bonus, or pension drawdown that crosses a band boundary. Couples should compare two scenarios: holding all savings in one name vs splitting equally — the latter often saves £200–£400/year by using both PSAs and both starter bands.

Regional differences (Scotland, Wales, Northern Ireland)

Income tax bands differ in Scotland (Starter 19%, Basic 20%, Intermediate 21%, Higher 42%, Advanced 45%, Top 48%). However, savings interest, dividends, and capital gains are taxed at UK-wide rates regardless of where you live, because these are reserved (non-devolved) tax categories. Wales uses UK rates for income tax (the Welsh rate is currently 10p matched to UK basic rate). Northern Ireland uses UK rates throughout. Your Personal Savings Allowance, Dividend Allowance, and Annual Exempt Amount are identical across all UK nations.

Savings Interest Tax Calculator — UK 2025/26