Cash ISA Rates Ranked: The Best Accounts for 2025/26 and What They Actually Pay After the Bonus Expires

Every comparison site ranks easy access cash ISAs by headline rate. Here's what that ranking looks like — and what it hides.

The chart tells the story. Trading 212 tops every league table at 4.68%, but strip away the 1.08% bonus and the underlying rate is 3.60% — below the 3.75% BoE base rate. Plum at 4.66% is worse: its underlying rate of 2.54% is catastrophic.

Moneybox deserves attention. Its headline rate of 4.51% includes a smaller bonus component, but the underlying rate of around 3.70% is competitive. More importantly, it accepts transfers from existing ISAs — a critical feature if you're consolidating old pots paying 1-2%.

Virgin Money at 4.15% and Bank of Ireland UK at 4.06% pay exactly what they advertise. No bonus, no time bomb. For savers who won't remember to switch providers in 12 months, these are the rational choices.

One caveat on Virgin Money: it limits withdrawals to two per year. If you need regular access, Bank of Ireland UK's unlimited withdrawals at 4.06% make it the better bet despite the lower rate.

Fixed rate cash ISAs remove the guesswork. You sacrifice flexibility for certainty — and right now, the premium for fixing is thin but real.

The top one-year fixed cash ISA is Bath Building Society at 4.40%, with a £1,000 minimum deposit. Furness Building Society pays 4.45% for a two-year fix. Both are FSCS-protected up to £85,000 per person per institution — rising to £120,000 from later in 2026.

Think about what fixing actually means at current rates. The BoE base rate has fallen from 5.25% in August 2023 to 3.75% today — six cuts in 28 months. If the MPC delivers two more 25bp cuts this year, the base rate hits 3.25% by December 2026. A one-year fix at 4.40% from Bath Building Society would then sit 115 basis points above base rate. That's a genuine premium.

For savers who want a recognised high-street name, Virgin Money pays 4.22% for one year. NatWest offers 4.30% for two years but requires a £25,000 minimum deposit — effectively excluding smaller savers.

The case against fixing: if the Iran-driven energy shock persists and the BoE pauses or reverses course, easy access rates could rise. But the market is pricing cuts, not hikes. Fixing a portion of your allowance locks in a rate that's likely to look generous by Christmas.

The <a href="/posts/your-savings-account-interest-gets-taxed-at-40-premium-bonds-dont">Personal Savings Allowance</a> gives basic-rate taxpayers £1,000 of tax-free savings interest, and higher-rate taxpayers £500. At current rates, that covers less than most people think.

A basic-rate taxpayer with £27,000 in a regular savings account at 3.75% earns £1,012.50 in interest — already breaching the PSA. A higher-rate taxpayer breaks through at just £13,400.

Here's the comparison that matters. Take Virgin Money's cash ISA at 4.15% and a regular savings account at 4.30% (the kind of rate Chase or Chip might offer). A higher-rate taxpayer keeping £20,000 in the regular account earns £860 but pays £144 in tax after the PSA, netting £716. The same £20,000 in the cash ISA earns £830 — all tax-free. The ISA wins by £114 per year.

For additional-rate taxpayers with zero PSA, the gap is wider. And every year you shelter money in an ISA, it compounds tax-free permanently. The cumulative <a href="/posts/isa-season-last-chance-to-use-your-20000-isa-allowance-before-5-april-2026">ISA allowance</a> since 1999 now exceeds £240,000 — savers who've maximised it every year hold a substantial tax-free buffer that no future government can retrospectively tax.

If you're weighing the options, our ISA hub breaks down every ISA type and how they interact.

The 2025/26 ISA allowance is £20,000 per person. April 5 is six days away. Any unused allowance disappears permanently.

This matters more than usual because of what happens next. From April 2027, the cash ISA allowance for under-65s drops to £12,000. That gives you exactly two tax years — 2025/26 and 2026/27 — to shelter £40,000 per person at the full £20,000 rate. A couple can protect £80,000 in cash ISAs before the rules change.

At 4.15% (Virgin Money's rate), £80,000 generates £3,320 per year in tax-free interest. A higher-rate taxpayer would need to earn £5,533 gross in a taxable account to match that — requiring a rate of 6.92% after the PSA is exhausted. No savings account pays that.

Don't have £20,000 to deposit? Put in what you can. Even £5,000 in a cash ISA at 4.15% earns £207.50 tax-free, and that wrapper space is locked in forever. You can transfer to a better rate later without losing the tax-free status.

If you're debating whether to rush, the data is clear: even an imperfect ISA opened before April 5 beats a perfect one opened on April 7. The wrapper matters more than the rate.

Not every saver needs the same account. Here's how to match your situation to the right cash ISA.

New money, happy to switch annually: Trading 212 at 4.68% is rational if you'll actually transfer out when the bonus expires. Set a calendar reminder for March 2027. If you won't switch, you'll end up on 3.60% while congratulating yourself on being clever.

Transfers from old ISAs: Moneybox at 4.51% accepts transfers and pays a strong rate. If you have ISAs from 2019-2023 paying 0.5-1.5%, consolidating into Moneybox adds hundreds in annual interest. Read our transfer guide — never withdraw and redeposit, or you lose the tax-free status.

Set-and-forget savers: Virgin Money at 4.15% or Bank of Ireland UK at 4.06%. No bonus to expire, no nasty surprises in year two. Virgin limits withdrawals to two per year; Bank of Ireland UK doesn't.

Locking in for certainty: Bath Building Society at 4.40% (1-year fix) or Furness Building Society at 4.45% (2-year fix). Both sit meaningfully above where the base rate is heading. The two-year fix from Furness is the best risk-adjusted return in the market right now — you're locking in 70 basis points above base rate with further cuts likely.

Large balances (£50,000+): Split across providers to stay within the FSCS £85,000 protection limit. Use one easy access ISA for the current year's allowance and transfer older ISA pots separately. If your total ISA savings exceed £85,000 with one provider, you're taking uncompensated risk.

Higher-rate taxpayers: The ISA is non-negotiable. With only a £500 PSA, every pound of savings interest above that threshold loses 40% to HMRC. At 4.15%, your first £12,000 in a taxable account is fine — everything above it should be in an ISA. See our tax planning hub for the full picture.

Every rate in this article is a snapshot. The BoE has cut from 5.25% to 3.75% in six moves since August 2023. Markets price in at least two more cuts in 2026, which would bring the base rate to 3.25% by year-end.

If that plays out, easy access cash ISA rates will fall. Trading 212's 4.68% might drop to 3.8-4.0% (headline, including a refreshed bonus). Virgin Money's 4.15% could slide to 3.5-3.7%. Fixed rates lock in today's level — which is why the Bath Building Society one-year fix at 4.40% and the Furness two-year at 4.45% look increasingly attractive.

The counterargument: geopolitical risk. If the Iran situation escalates further and energy prices spike, the BoE may pause cuts or even raise rates. In that scenario, easy access savers benefit from rising rates while fixed-rate holders are stuck. But the base case from the MPC's own forward guidance points to continued easing.

The practical takeaway: split your allowance. Put half in easy access (Moneybox or Virgin Money) for flexibility and half in a one-year fix (Bath Building Society) for protection against falling rates. If you have existing ISA pots, consolidate them into the best available transfer rate before April.

For the broader investing picture — including whether you should be in a <a href="/posts/isa-comparison-best-stocks-shares-isa-platforms-uk-202526-fees-features-and-who-each-one-is-best-for">stocks and shares ISA</a> instead — the answer depends entirely on your time horizon. Cash ISAs are for money you'll need within five years. Everything else belongs in equities.