Before you apply
- No withdrawals until the end of the term.
- The term is 1 year.
- 90 days' interest.
What you'd earn in a year
If you save
- Interest at 4.88% AER
- £244.00
- About
- £244.00
Before tax: about £244 a year on £5,000. Information only, not a recommendation.
Is my money safe?
FSCS protected: up to £120,000 per person, per banking licence.
This account is on the Castle Trust Capital PLC licence.
Legal name: Castle Trust Capital PLC.
Check protection on the FSCS website ↗ (opens in a new tab)Key facts
Money in and out
- Minimum deposit
- £1,000
- Withdrawals
- No withdrawals until the end of the term
- Manage
- Online
Interest
- Rate
- 4.88% AER fixed
- Gross rate
- 4.88%
- Paid
- Not yet checked
- Term
- 12 months
Who can open it
- ISA
- Cash ISA
New money limited to your £20,000 yearly ISA allowance.
Source: castletrust.co.uk · Last verified 17 Oct 2026, 09:51 UK time
Rate history
We started tracking this account on 16 Oct 2026. Further changes will show here.
Similar accounts
1 Year Fixed Rate Plus Cash ISAShawbrook Bank4.97% AER1 Year Fixed Rate Cash ISAHodge Bank4.92% AER1 Year Fixed Cash ISAVanquis Bank4.90% AERSee all cash isa accounts →
Don't miss a better rate
We will email you if a higher comparable rate appears. Two separate choices. Neither is ticked for you.