The best cash ISAs – July 2025

The best cash ISAs are currently returning inflation-busting rates of up to 4.98%, while a stocks and shares ISA is a good option for long-term savings.

For those who want to lock in their cash for a set time, fixed-rate cash ISAs are a good place to start.

Everyone adult in the UK gets a £20,000 tax-free Individual Savings Account (ISA) allowance each fiscal year. But that could change, with cash ISA reforms on the cards.

We have rounded up the best cash ISAs on the market today.

The best cash ISAs: easy access

Easy access cash ISAs do what they say on the tin, letting you access your savings without penalty.

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The best cash ISAs: one-year fixed rate

If you’re happy to lock your cash away without any withdrawals for a year, then you're guaranteed returns of up to 4.35% until your fixed term ends.

The best cash ISAs: two-year fixed rate

If you have savings you’re happy to lock away for at least two years, you’ll find rates on cash ISAs of up to 4.2%.

The best cash ISAs: three-year fixed rate

What you need to know about the best cash ISAs

When choosing a cash ISA, there are two main factors to look out for: how long you are comfortable locking your cash up for and the interest rate.

• Easy access ISA accounts allow you to withdraw funds without incurring a penalty.
• Fixed-rate cash ISAs offer a fixed rate of return – usually higher the longer you are prepared to lock your money away. Note: if you withdraw money before the end of the term, then you are likely to be penalised, usually with a reduction in the rate of interest.

Generally speaking, the longer you leave the money untouched, the more interest you can earn. Many ISAs are classed as ‘flexible’, meaning you can replace any funds you withdraw in the same tax year without affecting your annual ISA allowance – which is currently £20,000.