Best Cash ISAs Right Now: Why the Highest Rate Isn't Always the Best!

The 2026/27 tax year is underway, which means a fresh £20,000 ISA allowance for every eligible UK saver. The Cash ISA market is more competitive than it's been in years — but several of the most eye-catching rates come with conditions that materially change the picture.

Here's what's worth knowing before you move your money.

The top easy access rates right now

As of writing this article (14/04/2026) eToro is currently topping the easy access Cash ISA market at 4.78% AER. XTB is advertising 6% AER, which sounds even better — but that rate lasts just 90 days before dropping to 4% AER variable. Blended over 12 months, XTB's effective rate works out at around 4.5%. The offer is also available to new customers only and closes on 30 April 2026.

The practical implication is straightforward: if you open a bonus-rate ISA, set a calendar reminder for 11 months after opening. You want time to research alternatives before the rate drops, not after.

It's also worth checking whether the transfer-in rate matches the headline rate. With Plum, new money earns 4.61% but transferred funds earn 4.08% — a meaningful difference if you're consolidating old ISAs.

What makes eToro different

eToro's Cash ISA isn't a standard bank deposit. Your money is held in a Qualifying Money Market Fund — a tightly regulated, very low-risk fund that lends to governments and large financial institutions on short terms. The return tracks the Bank of England base rate closely, so it behaves like interest — but the structure means FSCS protection is capped at £85,000, not the £120,000 you'd receive with a standard bank deposit. Every other account in our table currently offers the higher limit.

The 4.78% is also made up of two parts: an underlying rate tracking the base rate of 3.75%, and a promotional top-up eToro is choosing to fund. That bonus element can change at any time independently of the Bank of England.

Transfers in — not all accounts accept them

Transferring an existing ISA into a new account doesn't use your annual allowance — but not all providers accept transfers in. XTB's Cash ISA does not currently support inbound ISA transfers, meaning it's new money only. Atom Bank also doesn't accept transfers in. eToro accepts transfers with a minimum of £10,000.

Always initiate a transfer through the new provider, never by withdrawing cash yourself. Withdrawing and re-depositing loses the tax-free wrapper and uses your annual allowance.

Rates correct as of 14 April 2026. Check our live Cash ISA table for the latest figures before opening any account.