How Much Can You Save Before Paying Tax on Interest in the UK?

Quick Answer: UK Tax-Free Interest Savings

Most UK taxpayers can earn up to £1,000 of savings interest a year tax-free through the Personal Savings Allowance if they pay basic-rate tax, or £500 if they pay higher-rate tax. Additional-rate taxpayers, earning over £125,140, get no allowance and pay tax on all their savings interest. On top of this, anyone with total non-savings income under £17,570 may also benefit from the separate £5,000 starting rate for savings, taxed at 0%. Interest earned inside an ISA does not count towards any of these limits and remains completely tax-free, regardless of how much you hold. If your interest across all non-ISA accounts goes over your allowance, HMRC usually collects the tax automatically through your PAYE tax code the following year, rather than sending an immediate bill.

What This Means for UK Households in 2026

For years, low interest rates meant the Personal Savings Allowance was almost irrelevant to ordinary savers. Earning £1,000 in interest required a genuinely large deposit when rates were sitting at 0.5% or 1%. That calculation has changed. With the Bank of England base rate at 3.75%, held at that level on 30 July 2026, and top easy access savings rates running as high as 4.5% to 5% AER, a comparatively modest savings balance can now generate more interest in a year than the allowance covers.

This matters most for people who have built up a decent cash buffer, perhaps £15,000 to £40,000, in a standard savings account rather than an ISA, often without giving much thought to the tax position because it was never relevant before. It also affects anyone who has had a pay rise that pushed them from basic-rate into higher-rate tax, since that single change halves their tax-free interest allowance from £1,000 to £500 overnight.

The Current UK Rules in 2026/27

The amount of savings interest you can earn tax-free depends on three separate allowances working together. It is worth understanding each one, because most guides only explain the Personal Savings Allowance and miss the other two.

1. The Personal Allowance. Everyone gets £12,570 of total income, from any source, before paying any income tax at all. This has been frozen since 2021/22 and, following the Autumn Budget 2025, that freeze now runs all the way to 2030/31.

2. The starting rate for savings. This is a genuinely underused allowance. If your non-savings income, meaning wages, pension or self-employment income, is £12,570 or less, you get an additional £5,000 of savings interest taxed at 0%. For every £1 of non-savings income above £12,570, you lose £1 of this band, and it disappears entirely once your non-savings income reaches £17,570. This mostly benefits retirees and part-time workers with modest earned income but decent savings.

3. The Personal Savings Allowance (PSA). This sits on top of the above and depends on your tax band for 2026/27:

Crucially, the PSA applies to your total interest across every non-ISA savings and current account you hold, not per account. If you have three savings accounts each paying £400 of interest a year, that is £1,200 combined, not three separate allowances.

How Much Interest Can You Actually Earn Before Paying Tax?

The practical answer depends on your tax band and the interest rate you are earning. Using the top easy access rates available as of September 2026, here is roughly what that looks like in savings balance terms.

These figures are illustrative, based on a single flat interest rate applied to a whole balance for a full tax year. Real accounts often pay lower headline rates once introductory bonuses expire, and your actual tax position depends on your full income, not just savings interest.

Example for a Basic-Rate Taxpayer

Sarah earns £32,000 a year from her job, comfortably within the basic-rate band. She has built up £25,000 in an easy access savings account paying 4.55% AER.

Her gross interest for the year would be: £25,000 × 4.55% = £1,137.50

Her Personal Savings Allowance as a basic-rate taxpayer is £1,000, so £137.50 of her interest falls outside the allowance. That amount is taxed at her marginal rate of 20%, meaning she owes approximately £27.50 in tax on her savings interest for the year.

This assumes Sarah has no other savings accounts generating interest and that her salary and interest together do not push her into the higher-rate band. In practice, HMRC would typically collect this through a small adjustment to her tax code the following year rather than asking her to pay it directly.

Example for a Higher-Rate Taxpayer

Raj earns £58,000 a year, placing him in the higher-rate band. He holds £30,000 in a similar easy access account also paying 4.55% AER.

His gross interest for the year would be: £30,000 × 4.55% = £1,365

As a higher-rate taxpayer, Raj's PSA is only £500, so £865 of his interest is taxable. At his marginal rate of 40%, that works out to roughly £346 owed in tax on his savings interest, more than twelve times what Sarah owes despite Raj holding a similar balance at the same interest rate.

This example illustrates why the same savings strategy can produce very different tax outcomes depending purely on which side of the £50,270 threshold your income falls.

What Has Changed Recently?

What changed: Nothing about the Personal Savings Allowance itself has changed for 2026/27. The £1,000, £500 and £0 tiers remain exactly where they have been since the PSA was introduced in April 2016.

When it changed: The real shift is indirect. The Autumn Budget 2025 confirmed that the Personal Allowance and higher-rate threshold freeze, originally due to end in April 2028, has been extended to April 2030/31. At the same time, the Bank of England has kept its base rate at 3.75% since a hold on 30 July 2026, sustaining higher savings rates for longer than many savers expected.

Who is affected: The combination of frozen tax thresholds and persistently higher savings rates means more people are being pulled into paying tax on interest for the first time, and more basic-rate taxpayers are being pushed into the higher-rate band by wage growth, a process often called fiscal drag. Analysis reported in industry coverage of the 2025/26 tax year put the number of savers newly facing a tax charge on their interest at an estimated 2.7 million, though this figure comes from independent financial commentary rather than an official HMRC release, and readers should treat it as an informed estimate rather than a confirmed statistic.

Why it matters: If your income has risen since your last payslip check, or if your savings balance has grown while sitting in the same account, it is worth re-checking your position for 2026/27 rather than assuming last year's numbers still apply.

Common Mistakes UK Savers Make

1. Assuming all savings interest is automatically tax-free. Many people confuse the Personal Savings Allowance with ISA-style tax-free saving. Outside an ISA, interest is only tax-free up to your specific allowance, not without limit.

2. Forgetting the PSA covers all accounts combined. It is easy to assume each savings account has its own £1,000 allowance. In reality, HMRC adds up interest from every non-ISA account you hold, including current accounts that pay interest, before applying a single combined allowance.

3. Not accounting for interest pushing total income into a higher band. Your savings interest counts as income to working out which tax band you are in. A large lump of interest can, in rare cases, tip someone from basic-rate into higher-rate tax, which then retroactively halves their PSA for that portion of income.

4. Ignoring joint account rules. For most joint accounts held by a married couple or civil partners, HMRC assumes the interest is split 50/50 between you for tax purposes, regardless of who actually deposited the money, unless you have made an official election otherwise.

5. Missing the starting rate for savings entirely. This allowance is genuinely obscure. Retirees and anyone with modest earned income but decent savings often qualify for it and never claim it, effectively leaving up to £5,000 of extra tax-free interest unused.

6. Not checking the tax code after HMRC adjusts it. When banks report your interest to HMRC each year and it exceeds your allowance, HMRC typically changes your PAYE tax code for the following year to collect the tax gradually. Many people never notice this happened and do not realise why their take-home pay changed slightly.

How to Improve Your Situation

Step 1: Check your current position

Add up the interest you are likely to earn this tax year across every non-ISA savings and current account you hold, using each account's actual rate and balance rather than guessing.

Step 2: Work out your tax band

Combine your salary, pension income and any other taxable income to see whether you are in the basic-rate, higher-rate or additional-rate band, since this determines your PSA.

Step 3: Compare your total interest to your allowance

If your total interest across all accounts is close to or above your PSA, you are likely to owe some tax, even if each individual account looks modest on its own.

Step 4: Consider moving spare savings into an ISA

The 2026/27 ISA allowance remains £20,000, and any interest earned inside a Cash ISA is completely tax-free regardless of amount. As of early September 2026, top easy access Cash ISA rates were running close to 4.7% to 4.8% AER, in some cases competitive with, or better than, standard easy access accounts once tax is accounted for.

Step 5: Review your position each tax year

Interest rates, your income and the allowances themselves can all change. What was tax-free last year may not be this year, particularly if you have had a pay rise or your savings balance has grown.

Final Thoughts on How Much Can You

The Personal Savings Allowance has quietly gone from an irrelevant technicality to something that genuinely affects a large number of ordinary UK savers, simply because interest rates have stayed higher for longer than the allowance itself has been updated. If you have not checked your own numbers since rates improved, it is worth five minutes with a calculator and your latest statements.

None of this means you should panic or rush to move every pound into an ISA overnight. For many savers with balances comfortably under their allowance threshold, no action is needed at all. But if your savings, income, or both, have grown over the past year or two, checking where you actually stand is a far better strategy than finding out from an unexpected tax code change months after the fact.

Sources & References

• GOV.UK, "Tax on savings interest"

• HMRC, guidance on the Personal Savings Allowance and starting rate for savings

• Bank of England, "What is happening with interest rates in the UK?" and Monetary Policy Committee decision, 30 July 2026

• GOV.UK, ISA allowance guidance for the 2026/27 tax year

• HM Treasury, Autumn Budget 2025 policy documents on personal tax threshold freezes

Financial Disclaimer

This article is for general informational purposes only and does not constitute personal financial, tax or investment advice. Individual circumstances vary, and the figures, thresholds and interest rates referenced here reflect the position as of 2 September 2026 and may change following future Budget announcements, Bank of England decisions or HMRC updates. Readers should verify current rules directly on GOV.UK or with HMRC, and consider seeking advice from a qualified, FCA-regulated financial adviser or tax professional before making decisions based on their own financial situation.

📊 Related Tool: To determine whether your cash balance will generate enough annual yield to breach your Personal Savings Allowance threshold, calculate your annual interest on our compound interest calculator.