New parents tend to have a lot on their plates, and saving for a newborn may come lower down the priority list, if it’s on the list at all. But if new parents are considering investing in their new child’s future, the question many will ask themselves is should I start a child’s savings account or invest in a Junior ISA (JISA)? In this piece, we’ll outline the facts in the hope of you being able to make a considered decision. 

What a Junior ISA is

A Junior ISA is a long-term investment vehicle that can only be opened by parents or guardians. There are two types of Junior ISA – Cash Junior ISAs, which are more akin to a savings account and typically come with a fixed interest rate, and Investment Junior ISAs. Here at the Children’s ISA, we offer an Investment Junior ISA and, as the name suggests, funds are invested in stocks and shares. The annual allowance for both kinds of Junior ISA (Cash and Investment) is £9,000. Anyone can contribute to a child’s Junior ISA account, but the funds are locked away on behalf of the child until they reach adulthood. 

What a children’s savings account is

A Child’s savings account is wholly different from a Junior ISA. Parents or guardians can access the funds in the child’s account at any time, and the parent has complete control. There is no lock-in period, and funds can be withdrawn at any time. A children’s savings account (like the adult equivalent) tends to come with a fixed interest rate. A children’s savings account tends to offer the parent more flexibility, but this makes the funds less ‘protected’ from being accessed. 

Comparison table

On the tax line: this isn’t automatic; it’s a specific rule worth knowing. If a parent gifts money into a child’s savings account and the interest earned exceeds £100 in a tax year, all of that interest is taxed as the parent’s income, not the child’s. The £100 limit applies per parent, so a couple gifting jointly has £200 of headroom before this kicks in. The rule only applies to money from parents. Gifts from grandparents, other relatives or friends are exempt; however much they give, the interest is always treated as the child’s. A Junior ISA sidesteps this entirely, since everything inside it grows completely tax-free regardless of who contributed it or how much interest it earns.

Which suits your family

There’s no single right answer here; it depends on what you’re trying to achieve and who’s doing the saving.

If a grandparent wants to put money away for a grandchild with no intention of it being touched for years, a Junior ISA could be a good option. The funds are protected from being dipped into, and grow tax-free for as long as they’re locked away.

If your family might need access to the money before your child turns 18, perhaps for school trips, equipment, or unexpected costs, a children’s savings account gives you that flexibility. The trade-off is that the money is more easily spent, precisely because it’s easier to reach.

If you’ve already used your own £20,000 ISA allowance and want another tax-free home for savings, a Junior ISA lets you shelter more money from tax on your child’s behalf, separate from your own allowance entirely.

If part of your goal is teaching your child how to manage money before they’re an adult, a savings account, or a mix of both, let them get hands-on experience with saving and spending decisions while a Junior ISA quietly builds in the background for later. And, rather than having a predictable interest rate, the funds in an Investment JISA can go up as well as down. 

None of this is financial advice; it’s worth thinking through which scenario matches your situation, and speaking to a financial adviser if you want guidance specific to your circumstances.

FAQ

Can you have both a Junior ISA and a savings account for the same child?
Yes. Nothing is stopping you from opening both. Many families use a savings account for shorter-term flexibility alongside a Junior ISA for long-term, tax-free growth.

Can you change your mind and switch later?
You can transfer a Junior ISA from one provider to another, and you can transfer a Child Trust Fund into a Junior ISA. What you can’t do is move money out of a Junior ISA and into a regular savings account before your child turns 18; the funds stay locked in until then. A children’s savings account, by contrast, can be moved or closed at any time.

What happens to a Junior ISA at 18?
The account automatically converts into an adult ISA, and your child gains full legal control of the money. They can leave it invested, withdraw it, or use it however they choose; there’s no way to restrict what they do with it once they turn 18.

We make opening a Junior ISA as easy as A, B and C and the Children’s ISA have been providing Junior ISAs since they were created in 2011.