This month’s savings news mixes two very different things: genuine policy movement from HMRC on the future of ISAs, and a fresh crop of tempting-looking savings offers that come with catches. Let’s take them one at a time.
What’s actually confirmed about the ISA changes
Back at the Autumn Budget, the government floated the idea of cutting the Cash ISA allowance for under-65s from £20,000 to £12,000, starting in April 2027. That part has been public for a while. What’s new is that HMRC has now confirmed the "anti-circumvention" rules designed to stop people getting around that lower cash limit.
Here’s the practical shape of it. From 6 April 2027:
- Any interest earned on cash sitting inside a Stocks & Shares ISA or Innovative Finance ISA (so-called "non-cash ISAs") will face a flat 22% charge, no matter your income tax band.
- Money market funds — a cash-like, low-risk investment — won’t be allowed to make up 100% of a non-cash ISA. A small holding of shares, funds or bonds alongside it will still be fine.
- People under 65 won’t be able to transfer money from a Stocks & Shares ISA into a Cash ISA anymore.
- The £12,000 Cash ISA limit only applies once you turn 65; before that birthday’s tax year begins, over-65s keep the full £20,000 allowance, and the transfer restriction drops away too.
It’s worth pausing on why this exists at all. The government’s stated aim is to nudge people toward investing rather than parking large sums in cash, since holding pure cash inside an investment wrapper was becoming a workaround for the lower Cash ISA cap. A flat 22% charge is actually gentler than what higher and additional-rate taxpayers pay on ordinary savings interest outside an ISA — up to 42% or 47% — which is one reason the source behind this update suggests the real winners may end up being people who deliberately keep a small sliver of their non-cash ISA invested to legally sidestep the charge entirely. That’s a nuance worth knowing, not a call to action for everyone.
It’s also worth being precise about what this charge does and doesn’t cover. It applies specifically to cash and money-market-fund holdings inside non-cash ISAs — it is not a general 22% tax on savings interest everywhere, and ordinary savings accounts outside ISAs continue to be taxed under the normal rules and personal savings allowance.
None of this is finished. HMRC says fuller details will follow in a future Tax Free Savings newsletter, and a technical consultation with industry still has to run before legislation is finalised. So while the direction of travel looks settled, the small print — including exactly how ISA managers will calculate and report the charge — isn’t locked in yet.
Who actually needs to pay attention
Given the £12,000 Cash ISA allowance won’t bite until April 2027, and even then only affects the portion of savings people hold specifically in a Cash ISA above that limit, this mostly matters to two groups: people who deliberately keep large cash balances inside a Stocks & Shares ISA rather than a genuine Cash ISA, and people nearing or planning around their 65th birthday, since the rules treat that milestone differently. If you’re someone with a modest emergency fund and a regular Cash ISA or standard savings account, there’s little reason to act on this news today — it’s a "know it’s coming" item, not a "do something this week" item.
The other piece: a First Time Buyer ISA is coming, but details are thin
Alongside the ISA reform, the government has also outlined early plans for a First Time Buyer ISA to eventually replace the Lifetime ISA from around April next year. Unlike the LISA, it’s aimed purely at buying a first home rather than retirement saving, the government bonus would only be paid out when you actually complete on a property, and — because of that — the bonus itself wouldn’t earn any further interest or growth while it sits there. Existing LISA holders would be able to keep using their LISA alongside the new account, and Help to Buy ISA balances could transfer across. But the maximum you’d be able to save, the property price cap, and the size of the bonus are all still unknown, with a formal consultation on the design only closing in mid-August 2026. If you’re saving for a first home, this is one to watch rather than plan around just yet.
Reading a "top rate" headline without getting distracted
The second half of this month’s news is a reminder that a big percentage sign rarely tells the whole story. A few examples from July illustrate the pattern nicely:
| Account type | Access to your money | Typical limits | How long the boost lasts | What happens after |
|---|---|---|---|---|
| Easy access savings | Withdraw anytime | Usually no deposit cap | Rate is variable, no fixed boost | Rate can drop at any time |
| Regular saver (e.g. Santander’s 8%) | Some withdrawals allowed, but used allowance isn’t restored | Capped monthly deposit (e.g. £200/month) | Bonus portion often time-limited (e.g. 12 months) | Rate usually falls; account may keep running at a lower level |
| Short-term boosted rate (e.g. Revolut, Oxbury) | Varies by provider | Often capped balance (e.g. £25,000) | Very short window (a few months) | Rate drops sharply once the boost period ends |
| Fixed-term bond with welcome bonus (e.g. Raisin) | Locked away for the term | Minimum deposit required (e.g. £25,000) | Bonus is a one-off, term is fixed | Money is tied up until maturity |
None of this means boosted rates are a bad idea — a short-term top rate can genuinely be worth having if you’re happy to move your money again once it ends, and the cap or term fits what you needed anyway. The point is simply to check four things before you’re won over by the headline number: how much you can actually deposit, whether the top rate is permanent or a temporary bonus layered on a lower base rate, what the account does after the introductory period, and whether accessing your money early costs you anything.
Matching the account to the job
A calmer way to approach all of this is to start with what the money is for, not with which rate looks highest this month.
flowchart LR
A[What's this money for?] --> B{Need access anytime?}
B -->|Yes| C[Easy access account]
B -->|No| D{Saving toward a fixed goal or date?}
D -->|Yes| E[Regular saver or fixed-term]
D -->|No - long-term surplus| F[Check your ISA allowance first]
An emergency fund belongs somewhere you can reach without penalty, even if the rate is unremarkable. A short-term goal — a holiday, a car, a house deposit within a year or two — often suits a regular saver or a short fixed term, provided the deposit cap and lock-in match your plan. Longer-term surplus money, the kind you won’t need for years, is usually where a Cash ISA earns its keep, since interest grows free of UK income tax and, for many people, that £20,000 allowance (until 2027, at least) is more than enough room.
The takeaway
Nothing in July’s news demands an urgent account switch. The ISA reforms are real but not finished, they mainly reshape decisions for people holding large cash balances inside investment wrappers, and the flashy savings rates making headlines almost always come with a catch worth reading before you move a penny. The steadier habit — checking access, tax treatment, bonus length, deposit caps, and what happens once the introductory period ends — will serve you better than chasing whichever number is loudest this month. This article explains general savings concepts and recent policy updates; it isn’t personalised financial advice, and given the rules are still being finalised, it’s worth checking official guidance before making any decisions based on the ISA changes.
