ISAs are tax-efficient UK savings or investment accounts that allow you to earn interest or investment returns without paying Income Tax or Capital Gains Tax (CGT).
In last year’s Autumn Budget, Rachel Reeves announced changes to ISA limits that are set to come into effect in April 2027.
While the proposed reforms are still a few months away, understanding what’s changing now can help you plan ahead and make the most of your tax-efficient savings options.
Read on to discover what the new rules entail and what they could mean for you.
You can currently save £20,000 a year across your ISAs
In the 2026/2027 tax year, the annual ISA allowance is £20,000, which you can split across different types of ISAs. These include:
- Cash ISAs – A savings account where any interest earned is not subject to tax. These can be particularly useful for short-term goals.
- Stocks and Shares ISAs – An investment account used to buy stocks and shares, with no tax on profits. These offer the potential for higher returns but also come with risk.
- Innovative Finance ISAs – Peer-to-peer lending accounts for investing in loans to businesses or individuals, often offering higher interest rates but higher risk.
You can also transfer your ISA holdings between accounts if you want to rebalance your savings and investments or if you find a stronger interest rate.
Other types of ISAs have different limits:
- Lifetime ISAs (LISA) – These are for saving for your first property or for retirement and have an annual limit of £4,000, which counts towards your total £20,000 allowance. Every contribution is boosted by a 20% top-up from the government.
- Junior ISAs (JISA) – These are ISAs held on behalf of a child and have an annual limit of £9,000 per child. Any contributions you make to a JISA do not count towards your £20,000 ISA allowance.
The new rules will limit how much most people can save in Cash ISAs
From 6 April 2027, the annual Cash ISA contribution limit will drop from £20,000 to £12,000, while the overall £20,000 ISA allowance remains the same. The remaining £8,000 must be used in investment ISAs.
This limit only applies to people aged under 65, as it recognises that those in retirement may have more of a need for cash.
Moreover, under the new rules, it will no longer be possible to transfer funds from a Stocks and Shares or Innovative Finance ISA into a Cash ISA.
The changes aim to encourage more investment
The proposed changes come as the government looks to boost participation in investment.
A government report notes that around 29 million UK adults keep money in cash accounts with interest at around 1%. It also found that the UK has the lowest level of retail investing among the G7 countries.
Meanwhile, the report notes that the average annual return from investments over the past decade has been around 9%.
Over time, such differences can add up.
If you invested £2,000 and achieved a 9% annual return, it could grow to around £12,000 over 20 years. Meanwhile, the same £2,000 in a cash account paying 1.5% interest would rise to only about £2,700, leaving you more than £9,000 worse off. Moreover, the rate of return on cash is unlikely to keep pace with inflation, meaning that your savings could lose value in real terms.
Of course, investing always comes with a degree of risk, but markets typically deliver stronger returns over the long term, and the new rules are designed to encourage this type of investment.
So, while Cash ISAs can be good for short-term goals as they offer guaranteed interest, the rates are often considerably lower than market returns over the long term.
It’s important to factor the new rules into your financial plan
The new rules could affect your financial plan if you’re under 65 and tend to favour cash savings.
If you fall into this group, it may be worth reviewing how your savings and investments are balanced. You can read more about how to do this in our previous article on the topic.
While cash can play an important role in meeting short-term needs and maintaining an emergency fund, relying too heavily on it over the long term could limit your potential for growth and leave your savings more vulnerable to inflation. Depending on your goals, investing at least part of your money in investment ISAs may offer greater long-term growth potential.
If you are planning a major purchase in the next few years and want to keep your money accessible and tax-efficient, there is still time to make full use of your current Cash ISA allowances. You may also want to consider transferring funds from existing ISAs into Cash ISAs while the current rules remain in place.
As with any financial planning decision, the right approach will depend on your individual circumstances, timescales, and attitude to risk.
Get in touch
Our team of independent financial advisers in Lewes is here to help ensure your savings and investments are balanced to support your goals.
To find out more, please get in touch by emailing us at financial@barwells-wealth.co.uk or by phone on 01273 086 311.
Please note
This article is for general information only and does not constitute advice. The information is aimed at individuals only.
All information is correct at the time of writing and is subject to change in the future.
Please do not act based on anything you might read in this article. All contents are based on our understanding of HMRC legislation, which is subject to change.
The value of your investments (and any income from them) can go down as well as up and you may not get back the full amount you invested. Past performance is not a reliable indicator of future performance.
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