Protection
FSCS£120,000
Min balance
£1,000
Max balance
£1,000,000
Access
Until 24.05.2028
Interest paid
Yearly
Transfers in
Accepted
How It Stacks Up
Ranks 1st of 4
18-month cash ISAs we track
This account 4.70%
- UK CPI (Aug 2026)
- 3.10%
- Pays 1.60% more
- Average 18-month cash ISA
- 4.41%
- Pays 0.29% more
- Best 18-month cash ISA
- 4.70%
- About the same
Inflation: ONS. Averages and best rates: accounts on DepositScout.
A Good Fit For
- Pro: New and existing savers
Worth Weighing Up
- Con: You need at least £1,000 to open it
- Con: Not flexible: money you withdraw can't be replaced without using more allowance
Good to Know
A minimum £1,000 deposit must be made within 30 days of opening the account, and each deposit into the account must be a minimum of £1,000. Deposits into the Cash ISA must be from your Nominated Account by electronic payment; cheques are only accepted from an existing Cash ISA provider as part of a transfer.
Please verify all details with the provider – see our Disclaimer
See all Secure Trust Bank accounts
