Castle Trust Bank operates as Castle Trust Capital plc, authorised and regulated by the FCA/PRA under Firm Reference Number 541910. This review covers its 1 and 2 and 3 and 5 year fixed rate e-saver and 1 and 2 and 3 and 5 year fixed rate e-cash isa range, its position under the Financial Services Compensation Scheme, eligibility, and the customers it tends to suit, using verified.
Castle Trust Bank in context
The current range covers 1, 2, 3 and 5 year fixed rate e-saver, 1, 2, 3 and 5 year fixed rate e-cash isa. These are the products a new customer would actually encounter, and each carries its own terms around access, notice periods and eligibility that are worth reading before any money moves.
The mechanics
Savings products like these are funded by the customer depositing money, with returns paid as interest or, for Sharia-compliant providers, as an expected profit rate. Access depends on the account type: instant or easy access allows withdrawals on demand, while fixed-term and notice accounts trade flexibility for a higher headline rate.
Money held in eligible deposits is covered by the Financial Services Compensation Scheme, which is the backstop that applies if an authorised deposit-taker fails. That cover is per eligible person and is worth checking against any other balances held with the same banking group.
The detail that changes the picture
The nuance with Castle Trust Bank is less about the headline rate and more about access and protection: how quickly money can be withdrawn, whether the rate is fixed or variable, and how the deposit sits under FSCS rules. Those three points usually matter more than a small difference in advertised rate.
Who should look closer
Regulation and protection
Castle Trust Bank is covered by UK financial regulation through Firm Reference Number 541910, which can be checked on the FCA register. That reference is the single most reliable way to confirm a firm is genuine before any money changes hands.
Eligible deposits are protected by the FSCS. The limit applies per eligible person per authorised firm, so anyone holding larger balances should check how cover spreads across the wider banking group.
Guides for Castle Trust Bank |
Compare Castle Trust Bank against the market
Important information This article is for general information only and is not financial advice. Kaeltripton is not authorised by the Financial Conduct Authority and does not provide regulated advice or recommendations. Rates, products and eligibility change; always confirm details with the provider and the relevant regulator before acting. Kaeltripton is registered with the Information Commissioner's Office (ICO registration ZC135439). |
Regulator check
| FCA register number | 541910 (check on the FCA register) |
| Deposit protection | Eligible deposits with an authorised UK deposit taker are protected by the FSCS up to £120,000 per person per banking licence (limit raised from £85,000 on 1 December 2025). Brands sharing one licence share one limit. |
| Complaints | Complain to the firm first; after eight weeks or a final response, the Financial Ombudsman Service can review it free of charge. |
| Checked | 20 September 2026 |
Frequently asked questions
What can I choose to do with my savings when my Fixed Rate account matures?
Is Castle Trust Bank FCA regulated?
Yes. The verified records show Castle Trust Capital plc authorised under Firm Reference Number 541910, which you can confirm on the FCA register.
Is my money with Castle Trust Bank FSCS protected?
Eligible deposits are protected by the FSCS. The limit applies per eligible person per authorised firm, so check it against any other balances you hold in the same group.
What does Castle Trust Bank offer?
The verified range includes 1, 2, 3 and 5 year fixed rate e-saver, 1, 2, 3 and 5 year fixed rate e-cash isa. Always confirm current availability and terms on the official site.
Who is Castle Trust Bank best for?
It is positioned for online uk retail savers. Whether it suits you depends on your own amount, time horizon and existing arrangements.
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