Best ISA Rates UK 2026: What the Tables Miss
Quick answer
In mid-2026 the best easy-access cash ISA rates reach about 4.6% AER, with the top one-year fixed ISAs similar. But a headline rate is only worth chasing once your savings interest breaches your Personal Savings Allowance - GBP 1,000 for a basic-rate taxpayer. Below that, a taxable account can beat a cash ISA.
UK ISA rates and allowances at a glance (2026/27)
| Item | Figure / rule |
|---|---|
| ISA allowance 2026/27 | GBP 20,000 across all ISA types combined |
| Best easy-access cash ISA (representative, Jul 2026) | Around 4.5% to 4.6% AER, often including a bonus that drops after 12 months |
| Best one-year fixed cash ISA (representative, Jul 2026) | Around 4.4% to 4.6% AER, fixed for the term, early-exit penalty |
| Personal Savings Allowance | GBP 1,000 basic rate, GBP 500 higher rate, GBP 0 additional rate |
| Starting rate for savings | Up to GBP 5,000 of interest tax-free for low earners, tapered by other income |
| FSCS protection | GBP 120,000 per person per banking licence (since 1 December 2025) |
| Multiple cash ISAs | Allowed in the same tax year since 6 April 2024 |
| AER | Annual equivalent rate - the true yearly rate including compounding; always compare on AER |
The comparison tables all answer the same question - which cash ISA pays the highest headline rate - because that is the click they earn on. This guide gives you the current rates too, but adds the part the leaderboards leave out: whether the best rate is even the best home for your money. The figures above are representative for July 2026; rates change weekly, so treat a live table as the source of truth before you commit.
The catch is the Personal Savings Allowance. A basic-rate taxpayer can earn GBP 1,000 of savings interest a year with no tax to pay, so at around 4.6% you would need roughly GBP 22,000 of savings outside an ISA before HMRC takes a penny. Below that line an ordinary savings account paying the same rate leaves you exactly as well off, and cash ISAs sometimes pay slightly less than the best non-ISA accounts. The ISA wrapper earns its keep once you breach the allowance, once you hold enough that it will compound for years, or for money you plan to invest rather than save.
For the deeper dives, see our guide to the best fixed cash ISA rates, the best savings accounts for the non-ISA comparison that the Personal Savings Allowance makes relevant, and our cash ISA comparison for the current product table. If your horizon is five years or more, weigh a stocks and shares ISA against cash - the potential to beat inflation comes with the risk that the value can fall as well as rise.
This is general information, not financial advice, and tax rules and allowances can change. Rates are representative for July 2026; check a live table before you open an account.
Frequently asked questions
What is the highest paying ISA at the moment?
In July 2026 the top easy-access and one-year fixed cash ISAs pay around 4.6% AER. Rates move constantly, so check a live table such as Moneyfacts before you commit, and read past the headline rate for any introductory bonus that later drops.
Is 4.25% a good ISA rate?
In mid-2026 that is slightly below the top of the market (around 4.6%), but a fraction of a percent on typical savings is a few pounds a year. The bigger question is whether you owe tax on savings interest at all - if you are within your Personal Savings Allowance, a higher-paying taxable account may beat any ISA.
Can I pay into more than one cash ISA in a year?
Yes. Since 6 April 2024 you can pay into more than one cash ISA of the same type in a single tax year, as long as your total across all ISAs stays within the GBP 20,000 allowance. That makes it easier to split money to chase two rates.
Is a cash ISA worth it if I am a basic-rate taxpayer?
Only once your savings interest exceeds your Personal Savings Allowance of GBP 1,000. At around 4.6% you would need roughly GBP 22,000 of non-ISA savings before a basic-rate taxpayer pays any tax. Below that, an equal or higher-paying taxable account leaves you no worse off.
Are cash ISA rates keeping up with inflation?
Sometimes narrowly, sometimes not. When a cash ISA pays less than inflation your money loses spending power in real terms, which is why cash suits short-term goals and an emergency fund, while money you will not touch for five years or more is often better in a stocks and shares ISA (where the value can fall as well as rise).
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General information, not financial advice. Tax rules and figures can change; check the current position on gov.uk before acting.