The £12,000 Cash ISA Cut Is Coming: What UK Savers Must Do Before April 2027

If you have a cash ISA, a change is coming that could quietly shrink how much you can shelter from tax each year. In the Autumn Budget, Chancellor Rachel Reeves announced that the yearly cash ISA allowance will drop from £20,000 to £12,000 for people under 65. That new lower limit starts in April 2027. If you are over 65, nothing changes for you: your allowance stays at the full £20,000.

That is a big cut, and it has left a lot of savers confused and a little worried. The good news is you have time to prepare, and there are sensible moves you can make before the rules change. This guide explains what is happening in plain words, who it affects, why the government is doing it, and what you might want to do next.

First, what actually is an ISA?

An ISA stands for Individual Savings Account. Think of it as a special wrapper you put around your money. Inside that wrapper, the interest or growth you earn is completely free of tax. Outside it, you might have to hand some of that money to the taxman.

A cash ISA is the simplest type. It works like an ordinary savings account, but the interest is tax-free. Every tax year (which runs from 6 April to 5 April the following year) the government tells you the most you are allowed to pay in. Right now that limit is £20,000. From April 2027, if you are under 65, that limit for cash ISAs falls to £12,000.

What exactly is changing in April 2027?

Two things are worth knowing about.

• The cash ISA cut. From April 2027 the yearly cash ISA allowance drops to £12,000 for the under-65s. That is £8,000 less than today. For over-65s the allowance stays at £20,000.
• A rise in savings tax. From April 2027 the tax on savings and property income goes up by 2 percentage points. Basic-rate savers will pay 22%, higher-rate savers 42%, and additional-rate savers 47%. This matters because it makes tax-free wrappers like ISAs more valuable, not less.

So while your cash ISA room is shrinking, the reason to use whatever room you have is actually growing.

The overall ISA allowance is not being cut

This is the part people miss, and it really matters. Your total ISA allowance across all types of ISA stays at £20,000 a year. It is only the slice you can put into cash that drops to £12,000 for the under-65s. So if you are under 65 from April 2027, you could still pay £12,000 into a cash ISA and the remaining £8,000 into a stocks and shares ISA in the same year, using your full £20,000. You are not losing ISA room overall. You are being pushed to use a different type of ISA for part of it.

That is a much less scary picture than "the allowance is being cut in half", which is how some people have read the headlines. The room is still there. The government is simply steering where you can put it.

Who is affected by the cash ISA cut?

The cut only touches people under 65. If you are 65 or older, your £20,000 cash ISA allowance stays exactly as it is.

But even among the under-65s, most people will not feel the change straight away. To hit a £12,000 cash ISA limit, you would need to be saving a fair chunk of money into cash each year. Plenty of savers never get close to £12,000, let alone £20,000. If you put a few thousand pounds a year into a cash ISA, the new limit may never bother you.

The people who will notice are bigger savers: those who like to keep a large cash cushion, or who have received an inheritance, a bonus, or the proceeds of a house sale and want to protect it from tax.

Why is the government doing this?

The aim is to nudge people away from holding so much in cash and towards investing instead. The government would prefer more savers to use a stocks and shares ISA, where money is invested in things like company shares and funds.

The thinking is that money sitting in cash does not do much for the wider economy, while money invested in businesses helps them grow. Whether that logic suits your own situation is a separate question, and one only you can answer. Cash and investing do very different jobs, and we will come back to that.

Smart moves to make before April 2027

You have until April 2027 before the lower limit kicks in. That gives you at least one full tax year, 2026/27, where the £20,000 cash ISA allowance still applies to everyone. Here is how to make the most of the time.

1. Use your full allowance while you still can

If you have the spare cash and you want to keep it in a tax-free cash account, consider filling as much of your £20,000 cash ISA allowance as you can in the 2026/27 tax year. Money that is already inside an ISA wrapper stays protected. The lower £12,000 limit only affects new money you pay in from April 2027 onwards, not the money you have already sheltered.

2. Understand the £8,000 gap

From April 2027, an under-65 saver loses £8,000 of yearly cash ISA room. If you are used to filling the full £20,000, think about where that extra £8,000 will go. It could go into a stocks and shares ISA (the overall £20,000 ISA allowance across all ISA types is not being cut, only the cash portion). Or it could sit in a taxable savings account, where the new higher savings tax may take a bite.

3. Ask whether a stocks and shares ISA suits you

A stocks and shares ISA can grow faster than cash over the long run, but its value can also fall. It is not a like-for-like swap for a savings account. Investing usually only makes sense for money you will not need for at least five years. If you want to weigh this up properly, read our guide on cash ISA vs stocks and shares ISA before you decide.

4. Think about who holds the savings

If you are married or in a civil partnership, remember you each have your own £20,000 ISA allowance and your own cash portion. Between a couple, that is a lot of tax-free room. Making sure both partners use their allowances, rather than piling everything into one person's name, can shelter far more money from tax over the years.

5. Do not panic or rush

This change is more than a year away. You do not need to make sudden decisions today. The worst thing you can do is move money you might soon need into investments just to dodge a tax that may never affect you. Investments can fall in value, and money you need within a few years usually belongs in cash. Take your time and match your choices to your real goals.

What if you are over 65?

If you are 65 or older, you can breathe easy on this one. Your cash ISA allowance stays at the full £20,000. The government has deliberately protected older savers, who are more likely to rely on cash and less likely to want the ups and downs of investing so late on. If you are approaching 65, it is worth knowing your allowance will not shrink once you cross that age line, which may affect how you plan the years just before and after your 65th birthday.

Where could the extra £8,000 go?

If you are a big enough saver to feel the cut, the practical question is where to park the £8,000 that no longer fits in a cash ISA. There are a few sensible homes for it.

• A stocks and shares ISA. Since the overall £20,000 ISA allowance is unchanged, the neatest move for long-term money is to invest the extra inside a stocks and shares ISA. The growth stays tax-free, just as it would in a cash ISA.
• A pension. Money paid into a pension grows tax-free and usually comes with tax relief on the way in. It suits money you will not need until later life.
• Premium Bonds or NS&I. Prizes from Premium Bonds are tax-free, which can appeal if you want to keep money in cash-like form without the tax.
• A partner's allowance. As mentioned, a spouse or civil partner has their own £20,000 room, so shifting some savings across can keep more of it sheltered.

The right choice depends on when you will need the money. Short-term cash generally stays as cash. Long-term money is where investing starts to make sense.

A common worry, answered

Many savers ask whether money already in a cash ISA is at risk when the rules change. It is not. The new £12,000 limit only applies to fresh money you add from April 2027 onwards. Everything you have already sheltered stays sheltered, and it keeps earning tax-free interest for as long as it sits inside the wrapper. You will never be forced to take money out or move it into investments. The change is only about how much new cash you can add each year, not about the pot you have already built.

The takeaway

The cash ISA cut to £12,000 for under-65s is real, but it is not the disaster some headlines suggest. Most modest savers will barely notice. Bigger savers have a clear job to do: use the full £20,000 cash allowance while it lasts, plan for the £8,000 gap, and decide calmly whether some of that money belongs in investments instead. With a rise in savings tax landing at the same time, keeping money inside any ISA wrapper is more useful than ever.

This article is general information, not personal financial advice. Your own circumstances matter, so always do your own research or speak to a qualified adviser before making big money decisions.