ISA changes coming soon: What savers need to know

TLDR:

• The government has confirmed the Cash ISA allowance will fall from £20,000 to £12,000 for under-65s from April 2027. Savers aged 65+ will keep the full £20,000 Cash ISA allowance.
• The overall ISA allowance will remain £20,000, meaning the remaining allowance could still be used in Stocks & Shares ISAs or other investment ISAs.
• These changes only affect new contributions. 
• The Lifetime ISA will be replaced with a new first-time buyer ISA in April 2028. If you already have a Lifetime ISA, you can continue contributing to it indefinitely. 
• Main takeaway: Don’t let these changes stop you from saving into ISAs. ISAs remain one of the most tax-efficient ways to grow your money.

What are the new rules for Cash ISAs?

From April 2027, the maximum amount savers under the age of 65 can put into a Cash ISA each tax year will be reduced from £20,000 to £12,000. This change was announced by the government as part of the Autumn Budget and is aimed at encouraging savers to consider investing as well as saving.

The total annual ISA allowance -  the maximum you can put into all ISAs each tax year - remains £20,000. This means that under-65s can save up to £12,000 in a Cash ISA, and the remaining £8,000 (or more) can be used in other types of ISAs like a Stocks & Shares ISA, Innovative Finance ISA, etc. So you still have the same total tax‑free allowance, it’s just split differently for cash vs. investment ISAs

Importantly, the changes only affect new money you put into a Cash ISA from April 2027 onwards. That means:

• Money already in your ISA stays fully tax‑free and unaffected.
• You can still transfer existing ISA savings between providers.
• You can also make use of the current full £20,000 Cash ISA allowance in the 2026/27 tax year, before the new rules kick in.
  

Savers aged 65 and over will keep the full £20,000 Cash ISA allowance. 

What are the changes to Lifetime ISAs?

From April 2028, the Lifetime ISA will be replaced with a new ISA just for first-time buyer, not for retirement savers. If you already have a Lifetime ISA or you’re thinking of opening one this tax year, don’t worry, you can still open a Lifetime ISA and continue contributing to it indefinitely. That’s true whether you’re saving for your first home or building a pot for later life. 

The replacement Lifetime ISA won’t come in until April 2028, after a public consultation and legislative process.

In other words, existing Lifetime ISAs are safe, and you can still open one and receive the government bonus, as long as you meet the requirements.

The new first-time buyer ISA will have two major differences from the current Lifetime ISA. One, the new ISA will not have a withdrawal penalty, meaning first-time buyers can access their savings in full if their plans change. This is brilliant progress, as one of the biggest frustrations of current Lifetime ISAs is the withdrawal penalty.

Under the current model, if you take money out for anything other than buying an eligible first home (under £450,000) or funding retirement, you’re hit with a 25% withdrawal penalty is on everything you take out, not just your government bonuses. So you also lose some of your own savings - around 6%. 

The other major difference between Lifetime ISAs and the new first-time buyer ISA is how the bonus is paid. With a Lifetime ISA, the 25% free government bonus is paid monthly. With the new ISA, the bonus will be paid as a lump sum when you go to buy your first home instead. This means savers will no longer benefit from monthly bonuses adding up over time and earning interest or investment growth. That could reduce the overall value of your savings compared with the current setup.

Read our full take on the new Lifetime ISA here

Why is the government changing ISAs?

There are two reasons the government is changing ISAs. The reason the Cash ISA allowance is changing is that the government wants to encourage more people to invest, particularly in stocks and shares, rather than keeping large amounts in cash savings. Right now, cash savings dominate ISAs - billions of pounds are held in cash accounts rather than invested. Policymakers hope that nudging savers towards investing could support long-term economic growth.

However, the decision hasn’t been without criticism.

The Treasury Committee has warned that cutting the Cash ISA allowance may not actually persuade savers to move into investments. Right now, cash savings dominate ISAs - 14.4 million people have a Cash ISA, and it’s the most common type of ISA used by savers. Reducing the Cash ISA limit is unlikely to encourage people who’ve never invested before to do so without education on how investing works and its risks.

When it comes to Lifetime ISAs, there have been growing calls for change for some time. Lifetime ISAs (LISAs) have been a popular way for younger savers to build money tax‑free toward buying a first home or retirement, thanks to the 25% government bonus. 

However, it has come under criticism since being introduced in 2017. A frozen £450,000 property limit and a steep withdrawal penalty have left many careful savers either excluded or unfairly charged as housing costs and personal circumstances evolve.

At the same time, its dual role of supporting first‑time home purchases and retirement savings has made the product potentially confusing.

By introducing a replacement to the Lifetime ISA, the government wants to make it simpler and fairer for aspiring first-time buyers. However, it begs the question of why the existing LISA can’t just be reformed, instead of introducing a new one. Plus, there are some questions yet to be answered, like whether the new ISA will have a new property price limit in line with house price rises in recent years.

Why ISA savings still matter more than ever

Even with the upcoming changes, ISAs remain one of the most powerful savings tools available in the UK. That’s because ISAs allow you to save (or invest) completely tax-free, often benefitting from competitive interest rates if you save into a Cash model. Plus, with savings tax thresholds frozen, more people are expected to pay tax on interest outside an ISA, making tax-efficient savings even more valuable if you’re trying to build wealth for the long term.

What should you do now?

The best approach right now is simple: don’t panic, and keep saving. You’ll still be able to save tax-free, grow your money, and use ISAs as a key part of your long-term financial plan.

If you can, make the most of the current £20,000 allowance while it lasts, as under-65s can still save up to £20,000 into a Cash ISA until April 2027. The same goes for a Lifetime ISA - the replacement won’t come in until April 2028, and you can still contribute indefinitely into a Lifetime ISA if you’ve already got one, or open an account if you haven’t already.

Keep reviewing your savings rate to ensure you’re on the best deal. Switching providers or accounts can make a big difference to long-term returns.

And finally, think about how cash and investing fit into your long-term goals. Some people prefer the certainty of cash, while others may choose to invest part of their ISA allowance. There’s no one-size-fits-all approach, but if you think you’d like to explore investing, now is the time to start researching how it works and the risks involved. Start here with our essential guide.

*Fee-free mortgage advice is subject to eligibility, see terms & conditions here.