Fixed Cash ISA Account

To be eligible to open a Fixed Cash ISA, you must be:

• at least 18 years old 
• a UK tax resident or work as a Crown employee serving overseas and paid out of the public revenue of the UK — typically a serving member of the armed forces or a diplomat, if they are not resident in the UK
• be married to, or in a civil partnership with, an eligible person, and
• be a member of Serve and Protect Credit Union

If you are not already a member, don’t worry! You can join for free here!

You can start with a minimum of £5 and save up to £20,000 within the annual allowance. Additional contributions must adhere to ISA regulations.

Yes, but early withdrawals will close your account and incur a 60-day interest penalty. This ensures that you remain committed to your goals while still offering flexibility.

Absolutely. Your savings are protected up to £85,000 under the FSCS.

Yes, we accept transfers up to the £20,000 allowance and subscription limit for the 2025/26 tax year. Transferring is simple and hassle-free.

To open a Fixed Cash ISA account, you’ll need to become a member of our credit union and save a minimum of £10 per month in our Regular Saver account.

Don’t worry if you’re not a member yet – you can become a member for free here.

You can split your annual ISA allowance across the different ISA types – Cash ISA, Stocks and Shares ISA, Innovative Finance ISA and Lifetime ISA – or save the whole allowance in one type of ISA (apart from the Lifetime ISA, which has a limit of £4,000).

Serve and Protect Credit Union offer a Fixed Cash ISA only. This will be classed as one Fixed Cash ISA for the purposes of tax-free allowances and HMRC reporting.

If you’ve got existing ISAs with other providers from previous tax years, these don’t count towards your £20,000 annual allowance.

When your 2025/26 Fixed Cash ISA matures, and after the interest is paid, the balance will remain in the Fixed Cash ISA and then revert to our standard annual Fixed Cash ISA rate thereafter.

Alternatively, you may wish to transfer your money to another available Serve and Protect Credit Union account or withdraw it to another account.

All our savings accounts include free life cover up to £25,000 (up to the age of 65). This means, should the worst happen, your savings could be doubled up to the first £25,000, allowing you to support your family when they need it most. 

The free life cover benefit is subject to the terms and conditions of Serve and Protect Loan Protection and Life Savings policies, arranged by CMGL and underwritten by Covea Life Ltd. Note that this protection is a benefit of membership provided at no extra cost to the member. The Credit Union is the policyholder for

• Interest is paid gross without the deduction of income tax and doesn’t count towards your Personal Savings Allowance.
• If you change your mind within 14 days of opening your account, we will cancel your account without penalty or notice.
• You can request to transfer in ISAs held with other providers at account opening stage only. 
• *AER stands for annual equivalent rates and illustrates the interest rates if it was paid and compounded once each year.
• Your annual ISA allowance for the 2025/2026 tax year is £20,000. You can split the allowance across the different ISA types – cash ISA, stocks and shares ISA, innovative finance ISA and Lifetime ISA – or save the whole allowance in one type of ISA (apart from the Lifetime ISA, which has a limit of £4,000). We only provide a Fixed Cash ISA.
• You can make deposits up to £20,000 from your nominated UK bank or building society account. You can also transfer existing ISAs from other providers into this account, up to the current ISA allowance limit for the tax year.
• We reserve the right to withdraw this account at any time.