ISA vs Standard Savings Account
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
Higher-rate taxpayers, savings above your Personal Savings Allowance, long-term wealth building, anyone wanting tax-free interest indefinitely.
Smaller balances where you'll never exceed the Personal Savings Allowance, when ISA rates are noticeably lower than standard savings.
| Aspect | ISA | Standard Savings Account |
|---|---|---|
| Annual deposit limit | £20,000 (2025-26) | Unlimited |
| Tax on interest | None | Counts toward Personal Savings Allowance |
| Interest typical | Variable, often slightly lower | Variable, often slightly higher headline rate |
| Account types | Cash, Stocks & Shares, Lifetime, Innovative Finance | Easy access, fixed term, regular saver |
| Withdrawals | Easy access for cash ISAs | Easy access typically |
Frequently asked
Should I always use my ISA allowance?
For higher-rate (40%) or additional-rate (45%) taxpayers, usually yes — the tax saving is meaningful. For basic-rate taxpayers with savings under £20k earning typical rates, you'd struggle to use your £1,000 Personal Savings Allowance anyway, so a higher-rate non-ISA may earn more.
Can I have multiple ISAs?
Yes — since April 2024 you can pay into multiple ISAs of the same type in the same tax year. But the total across all ISAs of all types still can't exceed £20,000.