The best cash ISAs – April 2025
The best cash ISAs can help you make the most of your tax-free savings. Here are the top rates to grow your money – take advantage before they disappear


As the new tax year of 2025-26 begins, everyone in the UK aged 18 or more gets a £20,000 tax-free ISA allowance.
Despite falling rates on savings accounts after the Bank of England's interest rate cut in February, the best cash ISAs are returning inflation-busting rates of up to 5.71%.
Unsure which ISA is best for you? A stocks and shares ISA is a good option for long-term savings, but a cash ISA may make good sense in the short term.
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For those who want to lock in their cash for a set time, a fixed rate cash ISA is a good place to start.
To help you, we have rounded up the best cash ISA rates 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.
Account | AER | Minimum investment | Flexible ISA? | Notes |
---|---|---|---|---|
Moneybox Moneybox Cash ISA | 5.71% - includes a 1.51% bonus for 3 months | £500 | No | Interest must be compounded. |
Plum Plum Cash ISA | 5.06% - includes a 1.50% bonus for 3 months | £1 (2.50% rate, 5.06% rate paid at £100) | No | Open via mobile. Interest must be compounded. |
Tembo Money Tembo Cash ISA | 4.80% | £10 | No | Open via mobile. Interest must be compounded. |
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 that return for one year until your fixed term ends.
Account | AER | Minimum investment | Notes |
---|---|---|---|
Gatehouse Bank 1 Year Fixed Term Woodland Cash ISA | 4.35% | £1,000 | Open online. Interest can be paid away or compounded. |
Chetwood Bank HL Active Savings - 1 Year Fixed Rate Cash ISA | 4.30% | £1,000 | Open online. Interest must be compounded. |
Charter Savings Bank 1 Year Fixed Rate Cash ISA | 4.27% | £5,000 | Open online. Interest can be paid away or compounded. |
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 4.30%.
Account | AER | Minimum investment | Notes |
---|---|---|---|
Progressive BS 2 Year Fixed Rate ISA Bond | 4.30% | £500 | Open in person or via post. Interest can be paid away or compounded. |
Charter Savings Bank 2 Year Fixed Rate Cash ISA | 4.20% | £5,000 | Open online. Interest can be paid away or compounded. |
Hinckley & Rugby BS Fixed Rate Cash ISA | 4.20% | £500 | Open in person or via post. Interest can be paid away or compounded. |
The best cash ISAs: three-year fixed rate
Account | AER | Minimum investment | Notes |
---|---|---|---|
Ford Money Fixed Cash ISA 3 Year | 4.20% | £500 | Open online. Interest can be paid away or compounded. |
Castle Trust Bank Fixed Rate e-Cash ISA | 4.15% | £1,000 | Open online or over the phone. Interest must be compounded. |
Aldermore 3 Year Fixed Rate Cash ISA | 4.10% | £1,000 | Open online. Interest can be paid away or compounded. |
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.
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Oojal has a background in consumer journalism and is interested in helping people make the most of their money.Oojal has an MA in international journalism from Cardiff University, and before joining MoneyWeek, she worked for Look After My Bills, a personal finance website, where she covered guides on household bills and money-saving deals.Her bylines can be found on Newsquest, Voice Wales, DIVA and Sony Music, and she has explored subjects ranging from politics and LGBTQIA+ issues to food and entertainment.Outside of work, Oojal enjoys travelling, going to the movies and learning Spanish with a little green owl.
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