Savings
Featured Account
4.20%
AER* interest
paid at maturity
1 year Fixed Rate e-Saver
Important information about your ISA allowance
Have you used your £20,000 tax free ISA allowance for the 2025/2026 tax year?
If you’d like to make a deposit into an ISA for the current 2025/2026 tax year, we must receive your funds by 5pm on Sunday 5 April 2026. Any funds received from Monday 6 April 2026 onwards will count towards your 2026/2027 ISA allowance. Please note, the tax year your funds are applied to is based on when we receive the money, not when the account is opened. Deposits will not appear in your savings account until Tuesday 7 April 2026, when they will be allocated to the relevant tax year. Interest will be backdated to the day we received your deposit.
If you’re unable to see the funds by Wednesday 8 April 2026, please contact us.
To avoid delays, please ensure your payment is made from the registered nominated bank account linked to your ISA. Payments from any other account will be returned.
Our award-winning
range of accounts
It’s no wonder our savings accounts are award-winning:
- Consistently competitive rates
- Easy to apply for online
- Manage your accounts using our mobile app or online portal
- FSCS Protection up to £120,000
ISA Accounts
You can make the most of this year's ISA Allowance with our range of online e-Cash ISAs. You can transfer existing ISAs to us as well.
Fixed Rate Accounts
If you've used this year's ISA Allowance, or want to save outside of an ISA, our Fixed Rate Accounts give a guaranteed rate over a fixed term.
Notice Accounts
If you want to add to your account at any time, make withdrawals, but don't need immediate access, our range of Notice Accounts could be the answer.
Our Fixed Rate e-Cash ISAs or Fixed Rate Cash ISAs might be right for you if you:
- Have a lump sum to deposit
- Are looking for a guaranteed interest rate
- Can leave your savings untouched for a fixed term
- Haven't used all of this year's tax-free ISA allowance yet and/or have an ISA elsewhere that you'd like to transfer
Our Fixed Rate e-Savers or Fixed Rate Savers might be right for you if you:
- Have a lump sum to deposit
- Are looking for a guaranteed interest rate
- Can leave your savings untouched for a fixed term
Our Notice e-Savers might be right for you if you:
- Are happy for your interest rate to be variable
- Want to be able to make withdrawals
- Don't need instant access
- Want to be able to make additional deposits
Your Money’s Safe
Your eligible deposits with Castle Trust Bank are protected up to a total of £120,000 by the Financial Services Compensation Scheme, the UK’s deposit guarantee scheme. Any deposits you hold above the limit are unlikely to be covered.
Our Savings Accounts
Would you like some help identifying which account might be right for you?
Our latest Savings awards
It's easy to apply for a
new Savings account
It’s no wonder Moneyfacts has awarded us a ‘5 Star Easy to Open’ rating! Applying online for one of our e-Accounts couldn’t be easier. Read on for helpful information about applying.
Apply
online
(new and existing customers)
Take a look at the accounts we have on offer, choose the account that works for you, and apply online.
Apply with the Self Service Portal
(existing customers)
Existing customers can log into the Self Service Portal and apply for a new account in minutes. Click the link under ‘Apply Online’ to take you through to the list of available accounts.
Apply using
the app
(existing customers)
If you’re registered for the Self Service Portal, why not download our mobile app? You can use your fingerprint or face ID to log in, and apply for new accounts from there.
ISA Transfers
You can transfer money from an ISA with another provider to us:
- Complete the ISA Transfer In section during your application
- We will receive this the next working day, and once your account is opened we will contact your existing ISA provider to arrange the transfer to your Castle Trust Bank account
- If your current ISA provider doesn't accept electronic signatures and requires an original signature, we will send a form to you via email and you'll need to return this back to us in the post
- ISA Transfers can take anything from 5-15 working days to complete
For more information on how the process works, take a look at our ISA Transfer Guide.
Funding your account
These tips should help you get started with funding your account:
- When transferring from your nominated account, use Sort Code 60-84-08, your Castle Trust Bank account number, your full name as the payee, and choose the 'Personal account' option rather than 'Paying a company', as the account is held by you. You can also fund your account from an eligible Castle Trust Bank account, using our Self-Service Portal or mobile app.
- In addition, you can also transfer existing Cash ISAs from other providers to fund your Fixed Rate e-Cash ISA.
