Fixed-rate Cash ISAs offer a guaranteed interest rate for a set period, in exchange for limited access to your funds. This type of account is best for savers who are confident they won’t need to access their money during the term.
What Are Fixed Rate Cash ISAs?
Individual Savings Accounts (ISAs) are tax-free savings products. A Cash ISA allows you to earn interest without paying tax on it.
Each year, you can save up to £20,000 across all ISAs. Lifetime ISAs are limited to £4,000 annually.
Key Features to Compare
- Headline rate: The stated interest rate, usually expressed as an Annual Equivalent Rate (AER).
- Transfer in option: Whether you can move money from an existing ISA into this one.
- Early access penalty: The cost of withdrawing before maturity, often 90 days’ interest or more.
- Interest payment timing: Monthly or at the end of the term, affecting when interest counts toward your Personal Savings Allowance.
Top Fixed Rate Cash ISA Options by Term
One-Year Fixed Rate ISAs
- Bonus applies to deposits of £20,000 or more. FSCS protected.
- FSCS protected. Allows transfer from existing ISAs.
- FSCB protected. Transfer in allowed.
- FSCS protected.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
Two-Year Fixed Rate ISAs
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
Three-Year Fixed Rate ISAs
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
Four-Year Fixed Rate ISAs
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
Five-Year Fixed Rate ISAs
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
- FSCS protected. Transfer in allowed.
Expert Advice on Fixed Rate ISAs
According to Be Clever With Your Cash, the biggest mistake is locking away money that may be needed before the term ends.
The early access penalty—often 90 days’ interest—can erase much of the benefit of a fixed rate.
One recommended strategy is laddering: spreading savings across multiple term lengths. This reduces risk and allows you to benefit from fixed rates without fully committing to one long-term option.
It’s also vital to set a calendar reminder before maturity. Most providers will notify you, but if you don’t respond, your money typically moves to a lower-paying variable account.
What to Watch Next
As interest rates fluctuate, rates in fixed-rate ISAs may change. Always check the maturity date and renewal options before committing.
For more on savings options, see our guide to the best easy-access Cash ISAs here.
Explore our full list of top savings accounts here.
Be Clever With Your Cash provides real, relatable financial content. All links are affiliate-based and do not affect pricing or editorial independence.
Sources & further reading
Featured image: HK Sheung Wan morning Des Voeux Road Central 富邦銀行 RMB… by Bomenlton, CC BY-SA 3.0, via Wikimedia Commons. Image source · License
