The stealth tax on savers — and how to check if it's caught you

Let's answer the thing you probably typed into Google first, because it deserves a straight answer: yes, interest on an ordinary savings account is taxable — but most people don't actually pay anything on it, because three separate allowances usually soak it up before the taxman gets a look in.

So the honest headline isn't "savers are being taxed." It's that the allowances protecting savers have been standing still for years while interest rates — and the interest people earn — shot up. Same shelter, a lot more rain. And so the tax quietly arrives, for people who never used to pay it.

Why this is suddenly a live question

For most of the last decade, tax on savings interest was a non-issue for ordinary savers. Rates were on the floor — a £20,000 pot might earn you £100 a year — and the allowances were miles bigger than anything you could realistically earn. Two things changed that at the same time.

First, the Personal Savings Allowance has been frozen at £1,000 since it was introduced in 2016, and has never once been increased. Second, savings rates climbed off the floor: easy-access accounts now pay around 4–5%, and fixed bonds a touch more. So the interest you earn has multiplied, while the amount you're allowed to earn tax-free hasn't moved an inch. One line stood still; the other took off.

The number that tells the story: HMRC expects more than 2 million pensioners to pay tax on their savings interest in 2026/27. Not because they got richer — because the tax-free thresholds stopped moving while rates rose. The jargon is "fiscal drag." The plain version: you get pulled into paying tax on the same money, just because the threshold didn't keep up. It's a tax rise nobody has to vote for.

The three allowances that decide whether you pay

Savings interest gets stacked on top of your other income, and it's only taxed after three things have been used up. In order:

• Your personal allowance (£12,570). If your salary and pensions don't use all of it, the leftover covers savings interest at 0%.
• The starting rate for savings (up to £5,000 at 0%). This one's aimed at people with low non-savings income. It shrinks by £1 for every £1 you earn above the personal allowance, so it's gone by the time your other income reaches about £17,570.
• The Personal Savings Allowance. £1,000 if you're a basic-rate taxpayer, £500 if you're a higher-rate taxpayer, and — this catches people out — £0 if you're an additional-rate taxpayer. Anything above your allowance is taxed at your normal rate: 20%, 40% or 45%.

Stack those up and someone whose only income is savings interest can receive up to £18,570 a year completely tax-free (£12,570 + £5,000 + £1,000). That's the number that reassures a lot of retirees living off cash. But watch what happens as you add income: a full-time salary uses up the personal allowance and wipes out the starting rate entirely, leaving just the flat £1,000 — or £500 if you're a higher earner.

A frozen £1,000 allowance was generous when £1,000 of interest needed a £100,000 pot. At today's rates it needs about £22,000. That's the whole story.

What it actually looks like — two real examples

Say you've built up £30,000 in an easy-access account paying 4.5%. That's £1,350 of interest in a year — a perfectly ordinary amount for someone with a solid emergency fund.

• Basic-rate taxpayer (say a £35,000 salary): your £1,000 PSA covers most of it. The remaining £350 is taxed at 20% — a £70 bill.
• Higher-rate taxpayer (say £60,000): your PSA is only £500. So £850 is taxed at 40% — a £340 bill on the same pot.

Neither is going to change your life. But it's tax you didn't used to pay, on money you'd probably assumed was too small to bother HMRC — and if your balance or your rate is higher, it climbs quickly.

Want your own figure instead of an example? Our free Tax on Savings Interest Calculator works it out in about 20 seconds →

Who it quietly catches

This is really a tax on the sensible. The people getting pulled in aren't high-rollers — they're the ones who did the responsible thing:

• Retirees living off cash. A pensioner with the full State Pension is already using nearly all their personal allowance, so a chunk of savings interest on top is taxed with very little shelter left.
• Anyone who built an emergency fund during the rate boom. Three to six months of expenses in a 4.5% account is textbook — and now generates taxable interest.
• People who locked into fixed-rate bonds. A multi-year bond can dump a big lump of interest into a single tax year when it matures, spiking you past your allowance in one go.
• Higher earners with any cash at all. £500 doesn't stretch far at 4.5% — about £11,000 of savings and you're over it.

If you're the sort of person who tracks their money, you're almost by definition the sort of person this affects — because you've got savings worth tracking.

Scotland: your salary is Scottish, your savings are not

Quick one that trips up a lot of calculators. Scotland sets its own income tax bands, but they apply only to non-savings income — your salary, your pensions, your rent. Interest on savings is taxed at the UK rates and bands (20/40/45%) right across the UK, and your PSA tier is worked out on the UK thresholds too. So a saver in Glasgow and a saver in Manchester with the same income pay exactly the same tax on the same interest. Handy to know, and easy to get wrong.

The move that makes most of it disappear

Here's the bit worth acting on. Interest earned inside an ISA is completely tax-free, and it never touches your Personal Savings Allowance. So the single most effective thing most people can do is move taxable cash into a Cash ISA (or a Stocks & Shares ISA, if the money's for the long term) up to the annual limit. The interest simply stops being HMRC's business.

The other quiet lever, for couples, is whose name the money is in: savings held by the lower earner may sit under a bigger unused allowance. None of this is exotic — it's just the sort of thing that's easy to ignore until you realise a frozen threshold has been costing you.

The honest bottom line

Nobody's coming to raid your savings. On modest interest, most people still pay nothing. But the allowances that protect you are frozen — the £1,000 PSA for the foreseeable future, the personal allowance until 2031 — while rates have made "a bit of interest" into a real number. So more of us drift over the line every year without doing anything differently.

The useful move isn't to panic. It's to know your number: how much interest are you actually earning, how much of it is taxed, and would an ISA fix it? Those are answerable questions — and they beat finding out via a tax-code change a year later.

Frequently asked

This is general information for the 2026/27 tax year, not financial or tax advice. It covers the personal allowance, the £5,000 starting rate for savings and the Personal Savings Allowance, and treats "other income" as non-savings income; it doesn't model dividends, Gift Aid, the Marriage Allowance or the High Income Child Benefit Charge. Figures depend on rules and values that change over time. For decisions involving significant sums, please speak to a qualified, FCA-regulated adviser or a tax professional.