How to choose a cash ISA that suits you
In this guide
A cash ISA lets you earn tax-free interest on your savings. Understanding when you pay tax on your savings can help you decide if an ISA is the right choice for you.
Not all cash ISAs work the same way. From easy access to fixed rate - choosing the right type for your needs can help you make the most of your 2026/2027 allowance.
This guide covers what you should consider, to find a cash ISA that fits your goals, whether you're saving for the short or long term.
The government is making some changes to ISAs in the 2027/2028 tax year.
While everyone still has a total ISA allowance of £20,000, the rules are changing. From April 6 2027, anyone under the age of 65 can only pay up to £12,000 of their total ISA allowance into cash ISAs.
To find out more, read our guide to cash ISA rule changes or stay up to date at GOV.UK.
Why choose an ISA?
An ISA is a tax-free savings account available to UK residents 18 or over. The interest you earn is tax-free and doesn't count towards your Personal Savings Allowance.
You can save up to £20,000 in ISAs each tax year. If you're new to ISAs, check out our beginners guide to cash ISA rules.
Types of cash ISA
With a range of cash ISAs to choose from, there's an option to suit different savings goals and lifestyles. The right one for you will depend on how often you need to access your money and whether you're happy to keep your funds untouched for a period of time.
| Type | Key feature | Best if... |
|---|---|---|
| Easy access cash ISA | Make withdrawals any time. Some cash ISA accounts are Flexible ISAs. This means you can replace money you've withdrawn within the same tax year. | You want flexibility to dip into your savings. |
| Fixed rate cash ISA | Money is locked in for a set term. If you want to access your money before the term ends you'll usually have to close the account. This could mean you lose out on interest or have to pay a fee. | You want a guaranteed rate and don't need to make any withdrawals. |
| Regular saver cash ISA | You're expected to add money on a regular basis. | You want to add to your savings over time. |
Before you choose a cash ISA, think about how often you'll want access to your money, and whether you're happy to lock it away.
You can transfer your cash ISA to another provider at any time. Just be aware that some accounts have conditions.
You might lose interest or need to pay a fee if you transfer early, especially with fixed rate cash ISAs.
Always check the terms before making a move.
How to compare cash ISAs
Before choosing a cash ISA compare these key features:
Interest rate: Is it fixed or variable? Choosing fixed means locking your money in for a set time.
Access rules: Can you make withdrawals or close the account early? Will you pay fees or lose interest if you do?
Deposit limits: How much do you need to open the account? Can you top it up later?
Term length: If it's a fixed cash ISA, how long is your money locked in for?
FSCS protection: For peace of mind, make sure your provider is regulated by the Financial Conduct Authority (FCA) and covered by the Financial Services Compensation Scheme (FSCS).
Always check terms and conditions before applying for any savings account.
Your savings are protected
Cash ISAs from UK regulated banks and building societies are covered by the Financial Services Compensation Scheme (FSCS). This protects eligible savings up to £120,000 per person, per provider.
If you have more than £120,000 in savings think about spreading it across different providers. This can help maximise your protection.
Ready to explore your options? See our latest cash ISAs and find one that fits your savings goals.
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Compare our cash ISAs and find one that fits your savings goals.