Tax on Savings Interest 2026/27: The Personal Savings Allowance

For more than a decade, almost nobody paid tax on their savings - interest rates were too low to matter. That has changed. With accounts now paying real returns, ordinary savers are breaching the Personal Savings Allowance and getting tax bills on their interest. This guide explains the allowance, shows how much you can hold before tax bites, and sets out how to keep your interest tax-free.

Quick summary

• Personal Savings Allowance (PSA): £1,000 basic-rate, £500 higher-rate, £0 additional-rate
• Starting rate for savings: up to £5,000 at 0% if other income is low
• ISA interest: always tax-free and outside the PSA
• How tax is collected: usually via your tax code or Self Assessment

Worked example: when your savings become taxable

Sara is a basic-rate taxpayer with £25,000 in an ordinary account paying 4.5%. That earns £1,125 of interest - £125 above her £1,000 Personal Savings Allowance - so £125 is taxed at 20%, a £25 bill. Moving the money into a cash ISA would keep all of it tax-free.

How savings interest is taxed

Most people can earn some interest tax-free through the Personal Savings Allowance. Basic-rate taxpayers get £1,000, higher-rate taxpayers £500, and additional-rate taxpayers nothing. On top, people with low non-savings income may also benefit from the "starting rate for savings" of up to £5,000 at 0%. Interest above your allowances is taxed at your normal income tax rate.

Real-life examples

Example 1 - Linda, a basic-rate saver. Linda holds £30,000 in an account paying 4.5%, earning £1,350 of interest. Her £1,000 PSA covers most of it; the remaining £350 is taxed at 20% = £70. Run your own with the savings interest tax calculator.

Example 2 - Sam, a higher-rate saver. Sam earns £60,000 and has £20,000 saved at 4.5% = £900 interest. His PSA is only £500, so £400 is taxed at 40% = £160. Higher-rate savers hit the limit far sooner. Check your allowance with the personal savings allowance calculator.

Example 3 - bonds maturing together. If two fixed-rate bonds mature in the same tax year, all the interest can land at once and breach the allowance. Staggering maturity dates spreads interest across tax years and can keep each year within the PSA.

Who is affected

• Savers with larger balances held outside an ISA.
• Higher-rate taxpayers, whose PSA is only £500.
• Anyone with several fixed bonds maturing in one tax year.

How to keep your interest tax-free

• Use a cash ISA. Interest inside an ISA is always tax-free and doesn't count toward your PSA. You can pay in up to £20,000 a year across ISAs.
• Split balances between spouses to use two allowances.
• Stagger fixed-bond maturities so interest doesn't all fall in one year.
• Watch your tax band. Crossing into higher rate halves your PSA from £1,000 to £500.

Common mistakes to avoid

Don't forget that crossing into the higher-rate band cuts your PSA in half. Don't leave large balances in taxable accounts when an ISA is available. And remember that banks report interest to HMRC automatically - so unpaid tax usually catches up with you via a tax code change.

Why so many savers are newly affected

For more than a decade after the financial crisis, savings rates hovered near zero. At 0.5% interest, you would need £200,000 in the bank before a basic-rate taxpayer's £1,000 allowance was even threatened - so almost nobody paid tax on savings, and most people forgot the allowance existed. Now that accounts pay 4% to 5%, the maths has flipped. A basic-rate taxpayer breaches the £1,000 allowance at around £22,000 of savings, and a higher-rate taxpayer with only a £500 allowance reaches it at roughly £11,000. Millions of ordinary savers have crossed these thresholds for the first time, often without realising.

Because banks report the interest they pay directly to HMRC, the tax tends to catch up with you automatically - usually through a change to your tax code in a later year, or via Self Assessment if you already file. That can come as a surprise if you assumed savings interest was simply tax-free.

More real-life examples

Example 4 - a maturing fixed bond. Raj put £40,000 into a two-year fixed bond that pays all its interest at maturity. When it matures, two years' worth of interest - around £3,600 - lands in a single tax year, breaching his allowance in one go. Choosing accounts that pay interest annually, or laddering bonds so they mature in different years, spreads the interest and can keep each year within the allowance.

Example 5 - couple sharing savings. A couple holds £40,000 jointly. If it all sat in one partner's name and that partner were a higher-rate taxpayer, much of the interest would be taxed. Splitting the savings so each uses their own allowance - and putting more in the name of the lower or non-taxpayer - can wipe out the tax.

Example 6 - the starting rate for savings. Grace has very low earnings of £10,000 plus savings interest. Because her non-savings income is below the personal allowance, she can use the starting rate for savings (up to £5,000 at 0%) on top of her Personal Savings Allowance, sheltering a large amount of interest tax-free. This valuable rule is often overlooked by people with low earnings but significant savings.

How to organise your savings tax-efficiently

The order of priority for most savers is simple. First, fill your cash ISA, where interest is always tax-free and never counts toward your allowance. Second, use the lower-earning partner's name for taxable savings to make the most of two allowances and lower tax bands. Third, watch your tax band - crossing into higher rate halves your Personal Savings Allowance from £1,000 to £500, so a pay rise can increase the tax on your existing savings. The personal savings allowance calculator and ISA calculator help you plan.

How HMRC knows about your interest

A common misunderstanding is that savings interest is somehow off HMRC's radar unless you declare it. In fact, UK banks and building societies report the interest they pay you directly to HMRC each year. If you owe tax on it and don't already complete a Self Assessment return, HMRC usually collects it by adjusting your tax code in a later year - which can make it feel like a surprise, because the tax on this year's interest may come out of next year's pay or pension. Understanding this helps you plan: if you know your interest will exceed your allowance, you can expect the adjustment rather than be caught off guard.

It also explains why moving savings into an ISA is so clean. ISA interest is not reported as taxable and never affects your tax code, so it simply stays out of the system. For anyone who dislikes the uncertainty of code adjustments, that simplicity is a benefit in itself.

A worked comparison: taxed account versus ISA

Imagine two higher-rate taxpayers, each with £25,000 to save at 4.5%. The first uses an ordinary savings account; the second uses a cash ISA. Both earn about £1,125 of interest. The ISA saver keeps all of it. The ordinary saver has only a £500 Personal Savings Allowance, so £625 is taxed at 40% - a £250 tax bill, leaving £875. Over several years, and across a couple with larger balances, that difference compounds into a meaningful sum. The lesson is straightforward: once your interest is likely to exceed your allowance, the ISA wrapper pays for itself. Compare scenarios with the savings interest tax calculator.

Building a tax-free savings habit

The most effective approach is to treat your ISA allowance as the default home for savings, not an afterthought. Each tax year, direct new savings into your cash ISA first, especially if you are a higher-rate taxpayer with only a £500 allowance. Use a partner's name and allowance for any overflow held in taxable accounts. And review where your savings sit before 5 April, because the ISA allowance resets and any unused part is lost. These habits keep your interest tax-free year after year without any complicated planning.

Key takeaways

• The Personal Savings Allowance is £1,000 (basic rate), £500 (higher rate) and £0 (additional rate).
• Higher interest rates mean far more savers now exceed their allowance and owe tax on interest.
• A basic-rate saver breaches £1,000 at roughly £22,000 of savings at 4.5%; a higher-rate saver at about £11,000.
• Cash ISA interest is always tax-free and does not count toward the allowance.
• Split savings between spouses and stagger fixed-bond maturities to use allowances efficiently.
• Banks report interest to HMRC, which usually collects any tax via your tax code.

The bottom line

Higher rates are good news, but they make the humble cash ISA valuable again. If your savings are near the point where interest exceeds your allowance, move them into an ISA and keep the interest out of the tax net. With rates likely to stay meaningful for a while, this is no longer a niche concern for the wealthy - it is something most savers with a few thousand pounds set aside should check each year. The good news is that the fix is entirely within your control: every pound you hold inside a cash ISA earns interest that is yours to keep, free of tax and free of the paperwork that comes with a tax-code adjustment. The official guidance is on GOV.UK.

General information only, not personal advice.