Opening a Junior ISA for your child is one of the most tax-efficient ways UK parents can save up to £9,000 per year for their children’s future.

This guide explains exactly how to open a Junior ISA, who can open one, which providers offer the best rates in 2026, and whether junior ISAs are worth it compared to other children’s savings options.

With cash Junior ISA rates around 4% as of June 2026 and the potential for long-term growth through stocks and shares options, parents need clear information to make informed choices for their child’s future.

What is a Junior ISA?

A Junior ISA (Individual Savings Account) is an effective, long-term, tax-free way to save for a child’s future.

It is sometimes called a child ISA, children’s ISA or kids’ ISA, but they all mean the same thing.

This versatile account, available through various providers, is designed with the child’s financial growth in mind.

Open to contributions from anyone (parents, grandparents, aunts, uncles and family friends), it maintains an annual deposit limit for tax-free growth.

Mia Wealth founder Sophia Jarvis explains how £120 a month could make your child a millionaire, including how family and friends can gift straight into a child’s account.

Significantly, Junior ISAs are protected by the Financial Services Compensation Scheme if the provider fails: up to £120,000 per person, per banking licence for cash Junior ISAs, and up to £85,000 per person, per firm for stocks and shares Junior ISAs (this doesn’t cover investments falling in value).

Additionally, children with a Child Trust Fund (CTF), particularly those born between 2002 and 2011, can seamlessly transfer their funds to a Junior ISA, consolidating their savings into this modern, flexible savings vehicle.

What are the benefits of a Junior ISA?

Tax-free growth: no income tax or capital gains tax on the interest or investment returns.
A £9,000 allowance each tax year (2026/27), separate from your own £20,000 adult ISA allowance.
Anyone can pay in: parents, grandparents, family and friends can all contribute.
Long-term compounding: the money is locked away until 18, so it has years to grow.
FSCS protected: cash Junior ISAs are covered up to £120,000 per person, per banking licence.
A head start for your child: a tax-free pot for university, a first car or a house deposit.

How to open a Junior ISA?

When looking at how to open a Junior ISA, you need to first look at the different types of Junior ISA – cash or stocks and shares – both covered in more detail below.

Then you can find the provider who has that account that you are happy with.

Once you have figured that out, you need to get an application form and fill it in.

You can usually do this online. However, you can also apply at a branch if it’s a traditional provider, although many are online only these days.

You’ll need proof of identification for both you and the child you are opening it for. This is usually a full birth certificate or passport.

When you apply online, you will usually have to go through the identification checks digitally.

If you are opening with a lump sum, you’ll need your debit card details.

If you want to set up a direct debit for a regular deposit, you’ll need your bank details.

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What types of Junior ISA are there?

It’s important to decide which type of junior ISA you want to open. There are two choices to consider.

Cash Junior ISA

This is similar to a basic saving account with the bank.

The key difference being you save money for your child’s future tax-free.

Cash Junior ISAs are offered by most banks and building societies.

Stocks & Shares Junior ISA

Also known as an investment junior ISA, a junior stocks & shares ISA invests the money in a range of assets. This can include funds, property, funds and stocks and shares. It grows free of tax.

It is important to remember that your child can have one of each of these junior ISAs. Really though, you just need to ensure that the money put into the accounts stays within the annual savings and investments limits.

Investing into a junior ISA is a great way to grow the money long term and outpace the average rate you will receive from a cash ISA or savings accounts.

See here for our full comparison of the best Junior Stocks & Shares ISA providers.

How much interest can the money in a junior ISA make?

Depending on the type of junior ISA you open will change how much interest can be made.

As of June 2026, the best rates for a cash Junior ISA are around 4%. This means if you invested £1,000 you’d have £1,040 at the end of the first year.

If you paid in £1,000 at the start of every year from birth until they turned 18 (18 payments), they’d have about £26,671, of which £8,671 is interest, assuming the rate stayed at 4% the whole time, which isn’t guaranteed.

Stocks and shares junior ISAs are different. Because the money is invested in different areas, you aren’t 100% sure how your money will grow.

However, due to the long-term idea of junior stocks and shares ISAs, they have got the potential to deliver greater growth. It’s worth looking at how different providers have performed over the last few years.

Many of them are award-winning. Of course, investments can go up and down, so you might not make as much as you think.

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Junior ISA alternatives

There are some children’s savings accounts that offer a higher interest rate, but usually on smaller amounts of cash.

For example, as of June 2026 you can get around 5% on up to £5,000.

Easy access accounts are great if you think you’ll need the money.

However, you might be able to get higher interest rates if you are willing to lock the money away for a number of years.

Helping your child with financial education

Money habits form early, so the sooner children learn to spend, save and manage cash, the better. There is more help than ever, from books to YouTube channels and apps like GoHenry, that teach children and teenagers about money.

Pair that with a Junior ISA and you give them both a financial head start and the knowledge to use it wisely. Getting them earning and saving early, even from odd jobs, sets the foundation for adult money decisions like tuition, a first car or a mortgage.

Who can open a Junior ISA, and who can pay in?

A parent or legal guardian opens the account for a UK-resident child under 18. Once it is open, anyone can pay in (grandparents, aunts, uncles, family and friends), as long as the total stays within the annual limit.

What age can you open a Junior ISA?

There is no minimum age. You can open one from the day a child is born, right up until the day before they turn 18. From 16, the child can manage the account themselves, but no money can be taken out until they turn 18.

How much can you pay into a Junior ISA?

Up to £9,000 in the 2026/27 tax year. That limit covers a cash and a stocks and shares Junior ISA combined, and it is separate from your own £20,000 adult ISA allowance.

Can you withdraw money from a Junior ISA before 18?

No. The money is locked away until the child turns 18, other than in exceptional cases such as terminal illness. At 18 the child can withdraw it or leave it invested.

What happens to a Junior ISA when the child turns 18?

It automatically becomes an adult ISA. The child can take the money out or keep it invested and carry on contributing. It is worth talking to them about your plans for it before their 18th birthday.

Do you pay tax on a Junior ISA?

There is no income tax or capital gains tax on the interest or investment growth. Money you pay in counts as a gift, so it can have inheritance tax implications for you. Smaller amounts are usually covered by the £3,000 annual gift allowance.

Can you transfer a Junior ISA to another provider?

Yes. You can move a Junior ISA between providers, or switch between cash and stocks and shares, at any time. Always use the provider’s official transfer process so the money keeps its tax-free status.

Conclusion

Are Junior ISAs worth it?

In short, the answer is yes. If you want to provide some financial future for your children and put cash away now, which can gain interest and grow, it is a great idea.

You need to remember that any money you put away won’t be withdrawable for a number of years. So having a separate accessible account might be an idea.

FSCS protection will help put our minds at rest that the money we put aside for our children is safe. If you want to save a little something for your children, it is worth looking at how to open a Junior ISA and add cash to that account today.

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Disclaimer: Content on this page is for informational purposes and does not constitute financial advice. Always do your own research before making a financially related decision.