FTAdviser recently reported on the “serious confusion” surrounding changes to ISA rules set to come into force from April 2027.
ISAs offer a tax-sheltered way to save or grow your wealth, but imminent changes will look to discourage Cash ISAs in favour of the potential returns of investing in a Stocks and Shares ISA.
But these changes to the Cash ISA subscription limits and tax on interest in Stocks and Shares ISA cash holdings will also add a layer of complexity.
Keep reading for more on the upcoming changes and what you might need to do now to prepare.
ISAs are tax-efficient, but limits apply, and not every type will be right for you
There are four main types of adult ISA:
- Cash ISA
- Stocks and Shares ISA
- Lifetime ISA (LISA)
- Innovative Finance ISA
Under current rules, you can split your annual £20,000 ISA Allowance across all types, up to this limit. The LISA, though, has its own individual £4,000 allowance.
A Junior ISA (JISA) is also available. This can be opened on a child’s behalf by their parent or legal guardian and has a £9,000 annual allowance.
Changes could impact where you place your money, but ISA tax-efficiencies remain
ISAs are tax-efficient, and for that reason they will likely form an important part of your long-term financial plan.
In 2026/27, you don’t pay tax on interest in a Cash ISA, while Stocks and Shares ISA gains are free of Income Tax and Capital Gains Tax (CGT). The LISA, meanwhile, provides a 25% government top-up on contributions up to the £4,000 allowance.
From April 2027, however, certain tax-efficiencies are set to change.
Cash ISA allowance
Your Cash ISA is, in effect, a tax-efficient savings account. Your money is relatively safe (and protected by the Financial Services Compensation Scheme), but you’re unlikely to see significant returns and, in fact, your money might not keep pace with inflation.
In her 2025 Autumn Budget, chancellor Rachel Reeves announced a change to the Cash ISA designed to encourage UK consumers to switch from cash holdings to investment to boost economic growth.
From April 2027, those under 65 will only be able to place £12,000 a year into a Cash ISA, with any subscriptions above that amount automatically earmarked for investment.
This rule doesn’t apply to over-65s who retain full control over their £20,000 allowance and can place the whole amount into a Cash ISA if they wish.
If you’re under 65 and have Cash ISA holdings, you might want to rethink how you split your subscriptions this year in preparation for the rule changes from April. We can help here, so be sure to get in touch if you have any questions.
Stocks and Shares ISA tax on some interest
Your Stocks and Shares ISA – as the name suggests – already invests in the markets. This exposes your money to increased risk but the chance of higher returns too.
You can invest across asset classes as a type of diversification to spread investment risk, and this includes holding uninvested amounts in cash.
From April 2027, however, interest earned on this cash element will be taxed at 22%.
You’ll need to think carefully about your asset allocation and consider making investment decisions before subscriptions are made so funds can be allocated immediately and not held in cash, even temporarily.
All other tax efficiencies remain untouched, which means a Stocks and Shares ISA is likely to remain an important part of your overall financial plan.
While the limit to the Cash ISA allowance will apply to over-65s only (and be removed at the start of the tax year in which you turn 65), the 22% charge will continue to apply post-65 for cash held in non-Cash ISAs.
Cash-like assets can be held in a non-Cash ISA from April 2027, but they must not comprise 100% of the investments held. The definition of “cash-like assets” will also be narrowed to include only Money Market Funds.
This is where additional complication arises, so be sure to speak to us before making any ISA decisions, as some subscriptions and transfers will no longer be permissible.
Professional financial advice can help you to build tax-efficient wealth despite rule changes
Tax rules and regulations change from time to time, but when the above ISA changes take effect in April 2027, ISAs will remain tax-efficient.
If you can afford to, maximising your ISA Allowance each year allows your money to grow in a tax-sheltered environment, which could see you make significant gains, and could see ISA income used to supplement your retirement.
JISAs remain untouched by the new rules, so saving for your children or grandchildren also remains a good option, both for building them a nest-egg to take into early adulthood, as well as helping to impart valuable financial lessons.
Get in touch
Globe IFA’s expert financial advisors are on hand to help you manage your long-term financial plans in a changing landscape, so if you have any questions, be sure to get in touch. Please email hello@globeifa.co.uk or call us on 020 8891 0711 to discuss how we can help you.
Please note
This article is for general information only and does not constitute advice. The information is aimed at retail clients only.
