New Isa rules 2024 explained

Isa rules have undergone a big change which could affect the way you save and invest in these tax- efficient products. Below we explain how Isas work now and what’s going to be different about them in future.

Savers put £11.7 billion into Cash Isas in April 2024  – the highest inflow since the products were launched in 1999  – according to official data from the Bank of England.

In total, nearly £750 billion is held in Isas in the UK, of which approximately £456 billion is invested in stocks and shares Isas, and £285 billion in cash Isas. A further £9 billion is held in Junior Isas for children.

New rules that came into effect this April have changed how Isas operate and what you can do with them. And now there is the new British Isa, giving a £5,000 boost to your annual allowance.

In this article, we cover:

• What changes have been introduced to Isas this tax year?
• How do Isas work?
• Isa rules and the £20,000 allowance
• Isa deadline 2024/2025
• Which Isa is best for me?

Read more: Best cash Isas

What changes have been introduced to Isas this tax year?

Previously you could only open one of each type of Isa every tax year. For example, you could have one cash Isa and one stocks and shares Isa, but not two cash Isas or two stocks and shares Isas.

So, suppose you invested £10,000 into an easy access cash Isa last tax year, you wouldn’t be able to save your remaining balance in a fixed rate cash Isa. Instead, you’d need to use it in a stocks and shares Isa or a Lifetime Isa, if you qualify.

This rule has been abolished this tax year and you can now invest in as many Isas as you see fit.

Secondly, you can now make partial transfers if you’re moving funds from one provider to another.

In previous years there were restrictions on what you could transfer. For instance, if you wanted to move money from your cash Isa to a stocks and shares alternative, and you had contributed towards that cash Isa in that tax year, your entire contribution for that year needed to be transferred across.

This rule has since been removed and you can now decide the sum you wish to transfer. However, provider rules may yet apply, so always check the terms and conditions before opening an account.

How do Isas work?

An Isa is a tax efficient home for your investments or savings. Any dividends, profits and interest you make on the money inside this account is exempt from capital gains and income tax.

This allows you to maximise the money you earn from your savings or investments. But there’s a limit on the amount you can deposit into your Isas each tax year, which runs from April 6 to April 5, rather than January to December.

Our video also explains:

Different types of Isas

There are four of different types of Isa you can open as a UK adult, with the British Isa planned to come in next year.

Which ones are right for you depends on your financial goals, be they looking to save for your kids’ future, buying a house, or saving for retirement. The different types of Isas are:

• Cash Isas
• Stocks and shares Isas
• Lifetime Isas (age restricted)
• Innovative finance Isas
• Junior Isas (for children)
• British Isas (coming next year)

Isa rules: How much can I contribute?

While an Isa can be a tax efficient home for your money, there are some rules you’ll need to consider before opening your account.

The £20,000 limit

This tax year, you can put up to £20,000 across your chosen Isas. This limit is known as your Isa allowance, and it must be used before the end of the tax year. If you have some of your allowance remaining, you won’t be able to carry it forward into the next year.

However, there are exceptions for certain Isa types:

• The maximum you can save into a Lifetime Isa each year is £4,000
• The maximum you can save into a Junior Isa every year is £9,000 (although this is for your child and does not affect your own £20,000 allowance)

The allowances are pooled across the different Isa types. So if you contribute the full £4,000 limit in a Lifetime Isa, you’ll be left with with £16,000 to invest in other Isa types.

Can I transfer old Isas to a new provider?

You can move any money you have in an old account across to the new provider as long as it accepts transfers in.

There are no limits on the amount you can transfer. So the money you’re switching could exceed your £20,000 allowance. A transfer also won’t use any of your allowance.

It could make sense to transfer different pots into one place to simplify your finances, pay less in fees, or get a better interest rate.

In the past, if you want to transfer to a new Isa you had to transfer all of the money you had already deposited in that tax year. So, consider this example:

Sam had an Isa balance of £100,000 which has built up over several years. Over this tax year she’s deposited £15,000 into her fund but wanted to switch providers. Under previous legislation she had to transfer her entire £15,000 balance to her new provider.

Now, since the start of the new tax year, it is possible to make partial transfers.

The Isa deadline 2024/2025

The Isa deadline for 2024/25 tax year is at midnight on Saturday, April 5, 2025.

Do I have to fill in a tax return for my Isas?

The good news is that you do not have to declare any interest or capital gains on your savings or investments via a self assessment tax return. Remember any gains in your Isa are tax-free.

However, keep in mind this could change in the future.

Do I pay tax on Isa withdrawals?

You will still enjoy the tax-free benefits of saving or investing in these accounts when you withdraw any profits, interest or dividend income. 

If you hold shares in companies outside an Isa, you have a tax-free dividend allowance of £500; earn more than this and take the cash and you would pay tax on the payouts. This won’t happen if they are held within an Isa.

In April 2022, tax on dividend income increased by 1.25%. This means that if your investments are held outside an Isa, you would pay this tax at a rate of:

• 8.75% for basic rate taxpayers
• 33.75% for higher rate taxpayers
• 39.35% for additional rate taxpayers

We explain how shares are taxed.

Are Isas exempt from inheritance tax?

You can pass your Isa on to your spouse or civil partner should they outlive you without incurring inheritance tax.

However, at the time of death you must be:

• Living together
• Not separated by any court order

If you fulfil these criteria then your balance will be transferred free of inheritance tax to your spouse or civil partner. This is considered a one-off additional allowance and does not affect the surviving partner’s Isa allowance. 

If you leave your Isa to someone other than a spouse or civil partner it can be liable for inheritance tax.

We go into more detail on the inheritance tax rules including how to reduce your inheritance tax bill.

Which Isa is best for me?

Which ISA is right for me?

ISAs work best when you pick the right one for your savings goal. Take this short survey to find out which ISA might be right for you.

• It only takes a couple of minutes
• No personal details required

Get started

Cash Isa

There are some circumstances when a cash Isa might be best:

• If you want to earn a guaranteed return
• Easy-access cash Isas are ideal if you are setting money aside for any emergencies, such as a boiler breakdown or car repairs, because you can get access to your money quickly
• Cash Isas appeal to 45% additional-rate taxpayers and savers with bigger balances, especially if you want to make sure any interest stays tax-free

Here are the best cash Isas according to our ratings.

Stocks and shares Isa

There are some circumstances when a stocks and shares Isa might appeal:

• Can be better for those investing for the long term – five years or more – because returns from stock markets tend to outperform those on savings accounts over time
• Suitable for those who don’t mind taking on risk

We outline the best stocks and shares Isas here.

Junior Isa

If you have children, you might want to open a Junior Isa.

• These could be great for teaching kids about money and building up a pot of money for when they are older
• They come in cash and stocks and shares versions depending on your time frame

Lifetime Isa

If you’re saving for your first home or want to put money away for later life, Lifetime Isas offer a savings boost. You get 25% added to any money you pay in, up to £1,000 extra a year.

But there are a couple of major conditions.

• You can only open them between the ages of 18 and 40 – although you can keep paying in until you are 50
• There is a 25% penalty to any withdrawals you make unless they are to buy your first home or made after you’ve turned 60

Innovative finance Isa

Innovative Finance Isas work like other Isas, but let you take advantage of a few things that other Isas don’t, primarily peer-to-peer lending and certain property funds.

The key things to bear in mind with Innovative Finance Isas are:

• You won’t get FSCS protection on savings made in peer-to-peer loans
• Investment in the new asset types are illiquid, which means it might take longer than 30 days to access your funds

What about a Help to Buy Isa?

A Help to Buy Isa was the government’s first attempt at helping first-time buyers save. However, this product has now been replaced by the Lifetime Isa (Lisa).

Both types of Isa offer a 25% bonus on savings.

While you can no longer open a Help to Buy Isa, existing holders can keep saving in until November 2029. Any bonus will need to be claimed by November 2030.

Savers can contribute £200 a month and up to £12,000 in order to claim a maximum bonus of £3,000 to buy their first home.

Although it’s possible to have both a Lifetime Isa and a Help to Buy Isa, you can only use the bonus from one of them to buy a home.

The exception to the rule is if you’re buying with another first-time buyer, when one of you can use a Lifetime Isa and the other can use a Help to Buy Isa to purchase your home together. But bear in mind that the products have different restrictions on the value of the property you can purchase:

• Help to Buy Isas have a property value limit of £250,000 outside London and £450,000 within London.
• Lifetime Isas have a property value limit of £450,000 regardless of where you’re buying.

Check out our pick of the top Lifetime Isas.

British Isa

In his spring budget, the chancellor announced a reform to the current structure by introducing the British Isa.

It differs from the other Isas on offer because its £5,000 allowance is separate from your annual Isa limit. This means, if used correctly, your total Isa allowance could be boosted to £25,000 a year.

“This will ensure British savers can benefit from the growth of the most promising UK businesses as well as supporting those businesses with the capital to expand,” the chancellor said in his budget.

It’s a reform which was welcomed by UK Finance, the industry trade body, which said it should increase investment in the country.

“We welcome his focus on promoting ownership of UK stocks and helping more people save for the long term,” said David Postings, chief executive of UK Finance.

The government has been running a consultation for the British Isa to set out its objectives and implementation, which will now be on hold until after the election.

What is the new British Isa? Jeremy Hunt’s budget announcement explained

Can you lose money in an Isa?

While cash Isas benefit from FSCS protection, the value of your stocks & shares Isa or Innovative Finance Isa can go up or down.

If you have a Junior Isa or Lifetime Isa invested in stocks and shares, the value of your funds can also go up and down.

Investing in the financial markets always comes with a degree of risk – you could lose some or all of your money.

However, history shows us that if you diversify your investments and leave your money invested for at least five years, it is more likely to grow.