From April 2027, the Cash ISA allowance will be reduced to £12,000 for most savers, while those aged 65 and over will retain a higher limit of £20,000, according to HM Treasury. The changes, announced at Autumn Budget 2025 under former Chancellor Rachel Reeves, will now be overseen by new Chancellor John Healey and Prime Minister Andy Burnham.
Key changes to Cash ISA limits
HM Treasury confirmed: "Individuals aged 65 and over will benefit from a higher Cash ISA limit of £20,000, entitlement to which will apply from the start of the tax year in which an individual turns 65." This means that from the 2027/28 tax year, the standard Cash ISA allowance will be cut by 40% from the current £20,000, while the Stocks and Shares ISA and Innovative Finance ISA limits remain at £20,000.
Rationale behind the reforms
An HM Treasury spokesperson said: "These reforms are designed to encourage more people to benefit from the better long-term returns that investing can offer while continuing to support savers. We introduced an age carve-out for those aged 65 and over in recognition that people approaching retirement may need greater flexibility in how they manage their savings." The move aims to boost retail investment in the UK, potentially increasing capital available for businesses and infrastructure.
New rules to prevent circumvention
Government documentation outlines: "At Autumn Budget 2025, it was announced that from April 2027, the Cash ISA allowance would be reduced to £12,000 while the limit for Stocks and Shares and Innovative Finances ISA (non Cash ISAs) would remain at £20,000. The Cash ISA allowance for those aged 65 and over would remain at £20,000." To support this, several rules will be introduced:
- Transfers from non-Cash ISAs into Cash ISAs will not be permitted.
- Transfers from Cash ISAs to non-Cash ISAs will remain allowed.
- For those aged 65 and over, the transfer restriction will be lifted from the start of the tax year they turn 65.
- The charge on interest earned on cash held in non-Cash ISAs and the prohibition on 100% cash-like investments will continue.
Impact on savers
The new rules are designed to "minimise the opportunity for the lower Cash ISA limit to be circumvented, while preserving the flexibility needed for legitimate investment activity within non Cash ISAs." This means savers who previously moved money from Stocks and Shares ISAs to Cash ISAs will no longer be able to do so, potentially affecting their short-term cash management strategies.
Political context
The changes come as part of a broader financial strategy under the new leadership of Prime Minister Andy Burnham and Chancellor John Healey. The government aims to encourage more individuals to invest in stocks and shares, which historically offer higher returns over the long term compared to cash savings. However, critics argue that the reduction in Cash ISA flexibility may disadvantage those who prefer low-risk savings, particularly younger savers who may not yet have the confidence to invest in markets.
What savers should do
Savers are advised to review their ISA portfolios ahead of April 2027. Those under 65 who wish to maximise their Cash ISA contributions should consider doing so before the limit drops. For those nearing retirement, the age-based exemption could provide additional flexibility, but it is crucial to understand the transfer restrictions. Financial advisers recommend considering a diversified approach, balancing cash savings with investments to achieve better long-term returns.
