How a Cash ISA works and whether it's right for you
How a Cash ISA works:
- You pay money in regularly or as a lump sum.
- Your savings earn interest over time.
- You don’t pay tax on the interest.
- Withdrawals depend on the ISA type.
A Cash ISA could be right if you want:
- Tax-free savings.
- A simple way to earn interest.
- Predictable interest where you choose a fixed rate ISA.
- Fixed or flexible options for short to medium-term savings.
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A Cash ISA works very much like a regular savings account, with one key difference: the interest you earn is tax-free.
Types of Cash ISA?
Different types of Cash ISAs suit different goals. Here's a quick overview:
| Feature | Easy Access Cash ISA | Fixed Rate ISA | Lifetime ISA |
|---|---|---|---|
| Access to money | Withdraw anytime | Limited access | Restrictions apply |
| Interest type | Variable rate | Fixed rate | Variable + bonus |
| Best for | Short-term / emergencies | 1 + year savings | First home / later life |
| Government bonus | - | - | 25% bonus |
| Annual limit | Up to £20,000 | Up to £20,000 | £4,000 (Part of £20,000) |
Ready to choose an account?
Frequently asked questions
You save money, earn interest, and keep every penny of it tax-free - within your annual ISA limit.
Yes. Interest is usually free from UK income tax.
That means:
- No tax on your interest.
- Usually nothing to declare on a tax return.
- It doesn't count towards your Personal Savings Allowance.
For many people, that's the biggest win.
Yes, but it depends on the type:
- Easy Access: flexible withdrawals.
- Fixed Rate: restrictions or penalties may apply.
It pays a guaranteed interest rate for a set period. In return, access to your money is usually limited.
Your savings earn interest at a fixed or variable rate. And because it's inside an ISA, you won't pay UK income tax on it.
Yes. Eligible deposits are protected by the Financial Services Compensation Scheme (FSCS).
- FSCS protection up to £120,000.
- Covers Cash ISAs.
It depends on how soon you might need the money.
- Need flexibility? An easy access ISA may be worth considering.
- Happy to leave it untouched? A fixed rate may give more certainty over the interest you’ll earn.
You can save up to £20,000 each tax year across all your ISAs combined.