Best Cash ISA Rates Right Now — And How to Switch Before the Rules Change

Cash ISA rates are still attractive enough to beat inflation right now — but the account you opened years ago is probably not paying anywhere near the best available rate. Here's how to find and switch to a better one without losing your tax-free wrapper.

What's on offer today

As of late July 2026, the highest fixed cash ISA rate is 4.80% AER from Vida Savings on a five-year fix, with the best one-year fixed rate at 4.70% AER from AlRayan Bank via Meteor Savings, according to Moneyfacts. For easy access, this month's top headline rate is 4.44% AER from Plum — though that figure includes a 1.90 percentage point bonus for the first 12 months, so check what it reverts to. Atom Bank's easy-access cash ISA pays a more straightforward 4.25% AER with no bonus trick, per Which?'s cash ISA comparison.

With CPI inflation at 2.6% in the year to June, every one of these rates currently beats inflation before you even factor in the tax-free advantage over a standard savings account.

Why switching is worth the ten minutes it takes

Banks routinely launch new "best buy" ISAs to attract fresh deposits while quietly letting older accounts' rates drift down. If you haven't checked your cash ISA rate in the last year, there's a good chance you're earning meaningfully less than the top-paying accounts above — with zero extra risk to move.

Step-by-step: switching your cash ISA without losing tax-free status

1. Never withdraw and re-deposit the money yourself. Doing so uses up your annual ISA allowance and loses the tax-free status on that cash permanently.
2. Open the new ISA first, then use its official "ISA transfer" process — most providers have a dedicated transfer form or online journey for this.
3. Ask your new provider to request the transfer directly from your old provider. This keeps the money's tax-free wrapper intact throughout.
4. Check if your existing ISA has an exit penalty — many fixed-rate ISAs charge lost interest for early transfers, so compare the penalty against the extra interest you'd earn elsewhere.
5. Confirm whether you're transferring "current year" or "previous years'" money — some providers restrict transfers of the current tax year's contributions to same-type ISAs only.
6. Keep an eye on the transfer deadline — cash ISA transfers should complete within 15 working days by industry standard; anything slower is worth chasing.

Why the timing matters this year

From April 2027, savers under 65 will only be able to put £12,000 a year into cash ISAs, down from the current £20,000 overall ISA allowance, per Which?. Until then, the full £20,000 allowance can still go into cash if you want it to — so this tax year is one of the last chances to use a larger cash ISA allocation before the cap bites.

International comparison

The UK's ISA system has no exact equivalent elsewhere, but the closest comparisons are the US Roth IRA (tax-free growth, but with income limits and a retirement-focused withdrawal structure) and Australia's tax-free savings accounts, which are far more limited in scope than the ISA's broad, unrestricted tax-free wrapper. The EU has no bloc-wide equivalent; individual member states run their own tax-advantaged savings schemes, none of which match the ISA's flexibility for UK savers.

Key Numbers

• 4.80% AER — top fixed cash ISA rate, Vida Savings 5-year fix
• 4.70% AER — top 1-year fixed cash ISA, AlRayan Bank via Meteor Savings
• 4.44% AER — top easy-access headline rate (Plum, bonus included)
• 4.25% AER — Atom Bank easy access, no bonus
• £20,000 — current annual ISA allowance, dropping to £12,000 for cash from April 2027

Sources

• Which? — how to find the best cash ISA
• Moneyfacts — highest fixed-rate ISAs
• ONS — Consumer price inflation, UK: June 2026

Educational content only — not financial advice.