Jasmine Birtles
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These new ISA changes could affect millions – here’s how to stay one step ahead
Vicky Parry
30th Jun 2026
For years, ISAs have been one of the simplest ways for ordinary savers to protect their money from tax. Whether you use yours for rainy-day savings, a house deposit, retirement planning or long-term investing, the rules have been fairly easy to understand: you get an annual allowance, and anything inside the ISA wrapper is sheltered from tax.
But that simplicity is about to change.
The Government has confirmed new ISA rules that will come in from 6 April 2027. The changes are aimed at encouraging more people to invest rather than keep large sums in cash. But for millions of savers, especially those who rely on Cash ISAs for peace of mind, the announcement may feel confusing — and even a little worrying.
The good news is that nothing changes immediately. Savers still have time to understand the new rules, review where their money is held and make a plan before the changes arrive.
📌 The key takeaway
Cash ISAs are not disappearing. But from April 2027, under-65s will only be able to put £12,000 a year into a Cash ISA. The full ISA allowance will remain £20,000, but the rest would need to go into another type of ISA, such as a Stocks and Shares ISA.
What is changing with Cash ISAs?
At the moment, most adults can put up to £20,000 a year into ISAs. That can be held in cash, invested, or split between different types of ISA.
From April 2027, the overall ISA allowance will still be £20,000. However, if you are under 65, only £12,000 of that can go into a Cash ISA.
People aged 65 and over will keep the full £20,000 Cash ISA allowance.
💷 Simple example
If you are under 65 and want to use your full ISA allowance from April 2027, you could put:
- £12,000 into a Cash ISA
- £8,000 into a Stocks and Shares ISA
You would still be using the full £20,000 allowance — but not all of it could sit in cash.
What is changing with Stocks and Shares ISAs?
The Stocks and Shares ISA limit is not being cut. You will still be able to invest up to the annual ISA allowance.
However, there is an important change for anyone who leaves cash sitting inside a Stocks and Shares ISA.
From April 2027, interest earned on cash held inside a Stocks and Shares ISA will face a new 22% charge. This is designed to stop people using an investment ISA as a workaround for the lower Cash ISA limit.
💬 Expert view
“A Stocks and Shares ISA is still one of the most powerful tax-efficient accounts available, but it is designed for investing — not for parking large sums of cash.”
“If you are holding cash in your investment ISA while deciding what to do next, don’t panic. But do make sure you have a plan. Cash can be useful in the short term, but over longer periods savers should think carefully about whether that money should be invested, kept in a Cash ISA, or held elsewhere depending on their goals and risk appetite.”
Ruby Layram, Investment Editor at MoneyMagpie
Should you rush into investing?
No. This is where savers need to be careful.
The Government may want more people to invest, but investing is not right for everyone. Investments can fall as well as rise, and you may get back less than you put in.
If you need your money soon — for example for bills, a house deposit, care costs or an emergency fund — cash may still be the right place for it.
⚠️ Don’t panic invest
- Keep emergency money in cash.
- Only invest money you can leave alone for the long term.
- Make sure you understand the risks before choosing investments.
The wrong investment decision can cost more than missing out on a tax perk.
What about ISA transfers?
There are also new transfer rules coming.
From April 2027, under-65s will no longer be able to transfer money from a non-cash ISA, such as a Stocks and Shares ISA, into a Cash ISA.
However, transfers from a Cash ISA into a Stocks and Shares ISA will still be allowed.
In plain English
If you are under 65, the Government wants to stop people moving investment ISA money back into cash to get around the new £12,000 Cash ISA limit.
Will existing ISA savings be affected?
The lower Cash ISA limit applies to new contributions from April 2027. Money already held inside ISAs should remain within the ISA wrapper.
However, the changes could affect what you do with future contributions and how you manage cash inside investment ISAs.
✅ What savers can do now
- Use your current ISA allowance if you can afford to.
- Review how much cash you hold in ISAs.
- Check whether you have uninvested cash sitting inside a Stocks and Shares ISA.
- Think carefully before moving money between ISA types.
- Consider advice if you are unsure what is right for you.
How to protect your savings
The best way to protect your savings is to give each pot of money a clear job.
Emergency money should usually be easy to access and low risk. Money for short-term goals may also be better kept in cash. But money you do not need for several years could potentially be suitable for investing, depending on your circumstances.
If you normally use your full Cash ISA allowance, the new rules may mean you need to rethink your approach before April 2027.
Quick saver checklist
- Do I need this money within five years?
- Is my emergency fund easy to access?
- Am I using my ISA allowance wisely?
- Do I understand investment risk?
- Am I leaving too much cash inside a Stocks and Shares ISA?
The bottom line
The ISA changes may sound alarming, but they do not mean ISAs are no longer worth using.
Cash ISAs will still be useful for short-term savings and emergency funds. Stocks and Shares ISAs will still be one of the most tax-efficient ways to invest for the long term.
The key is not to panic. The rules are not due to change until April 2027, so savers have time to review their money and make sensible decisions.
MoneyMagpie tip
If you are under 65 and regularly save large amounts into Cash ISAs, now is a good time to review your options.
The goal is not to move money in a rush. It is to make sure your savings are in the right place before the rules change.
FAQs
When are the ISA rules changing?
The changes are due to start from 6 April 2027.
What will the new Cash ISA limit be?
For under-65s, the Cash ISA limit will fall to £12,000 a year. The overall ISA allowance will remain £20,000.
Will over-65s still get the full Cash ISA allowance?
Yes. People aged 65 and over will still be able to put up to £20,000 a year into a Cash ISA.
What happens to cash inside a Stocks and Shares ISA?
From April 2027, interest earned on cash held inside a Stocks and Shares ISA will face a 22% charge.
Should I move my ISA money now?
There is no need to panic. The changes do not start until April 2027, but it is sensible to review your savings and investment plans ahead of time.
This article is for information only and does not constitute financial advice. Investments can go down as well as up, and you may get back less than you invest.
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