Atom Bank Cash ISA

Fast, simple, and consistently high rates.

4.5

Reliable

Rate: 4.25% AER

Trustpilot: 4.8/5

Interest Rate

4.25%

Variable

Access

Easy

Instant

Min Deposit

£1

Low barrier

Platform

App Only

Biometric

Pros

Consistently high easy access rate of 4.25%
Very fast and secure account opening
Face/Biometric ID security
No bonus teaser rates - simply good value

Cons

App only - no desktop access
No branch network

Full Verdict

Atom Bank was the first app-based bank in the UK and continues to offer a slick service. Their Instant Saver ISA is straightforward: a great rate of 4.25% AER with no catches, no bonus periods that expire, and no limit on withdrawals.

It is perfect for those who want a modern, hassle-free ISA on their phone. Opening an account takes minutes, and transfers in are handled efficiently.

Tax-Free Savings? Yes Please.

What is a Cash ISA?

A Cash ISA is just a savings account where the taxman can't touch the interest. You can put in up to £20,000 each tax year. It's the smartest place to keep your emergency fund or short-term savings.

Fixed vs Variable: "Fixed" means you lock your money away for a year (or more) for a guaranteed rate. "Variable" (or Easy Access) means the rate can change, but you can get your money out whenever you want.

Inflation Risk

Cash ISAs are generally low risk and covered by the FSCS (up to £85k). The main risk is inflation. If the interest rate is lower than inflation, the real buying power of your money will go down over time.