Grow your savings, tax free
A savings account built for larger balances. A flexible ISA with up to £360,000 FSCS protection across three partner banks.
- Earn 3.23% AER variable on your savings.
- Transfer an existing ISA and earn a cash bonus of up to £500, paid after 12 months and earn 3.23% AER variable on top.
One rate. Triple FSCS Protection. One account.
- Your ISA savings are managed across three partner banks, offering up to £360,000 FSCS protection, all through a single Sidekick account.
- Plus, because this is a flexible ISA, any money you withdraw can be put back in the same tax year - so you never lose the allowance you've already used.
Move your ISA. Pick up a bonus.
Transfer your existing Cash ISA to Sidekick and receive a cash bonus of up to £500 after 12 months. The more you bring, the more you earn.
- Transfer £10,000–£24,999, receive a £100 cash bonus
- Transfer £25,000–£74,999, receive a £250 cash bonus
- Transfer £75,000–£120,000, receive a £500 cash bonus
Why choose Cash ISA for your savings?
Our dedicated team is focused on maximising your wealth.
A competitive rate
Earn 3.23% AER variable on your savings, plus a cash bonus of up to £500 when you transfer an existing ISA.
Secure and protected
Your savings are split across three Sidekick partner banks, each FSCS-protected up to £120,000. That gives you total coverage of up to £360,000 - three times the standard limit.
Easy access
The Sidekick Cash ISA is a fully flexible ISA. That means you can withdraw money whenever you need it - and re-deposit it later in the same tax year - without losing your annual ISA allowance. Not all Cash ISAs offer this. Ours does.
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Any questions on Cash ISA?
Quick answers to your top questions
All deposits earn 3.23% AER variable. If you transfer an existing ISA to Sidekick, you also earn a cash bonus of up to £500 maximum bonus per customer, paid after 12 months based on the remaining value of your qualifying ISA transfers at the 12-month mark. Terms apply.
When you transfer an existing Cash ISA to Sidekick, you earn a cash bonus based on the remaining value of your qualifying ISA transfers at the end of the 12-month mark: £100 for £10,000-£24,999 / £250 for £25,000-£74,999 / £500 for £75,000-£120,000. The bonus is paid into your Sidekick wallet after 12 months. Terms apply.
Your deposits are spread across three Sidekick partner banks. Each bank is FSCS-protected up to £120,000 per depositor - giving you total coverage of up to £360,000. This is calculated per depositor per bank, so the protection applies independently at each institution.
Yes. The Sidekick Cash ISA is a flexible ISA, which means you can withdraw money and re-deposit it within the same tax year without it counting against your annual ISA allowance of £20,000.