When Should You Start a Junior ISA? Timing Matters More Than You Think

Junior ISAs (JISAs) have quickly become a much-loved way for parents to provide their children with the best possible start to adult life, but when is the best time to begin saving in a JISA?

According to government statistics released last year, the number of Junior ISA holders increased to 1.37 million in the 2023 to 2024 tax year, up from 1.25 million in the year prior. The number of young Britons who are earning substantial sums in their accounts is also rising at a rapid rate.

Despite JISAs only being introduced in 2011, the number of account holders with pots worth more than £100,000 more than doubled to 2,250 in the 2023-to-2024 tax year, up from 1,080 during the year prior.

One of the strongest qualities of Junior ISAs is that funds can’t be touched until the child turns 18, and this means that there’s a potentially far greater period of time for investments to grow within a Stocks and Shares JISA in a way that can generate substantial returns later in life.

Over a long enough time frame, parents can benefit from compounded returns, which can enter the fray to really bolster the amount of money your child will be able to access when they enter adulthood.

But when should you open a Junior ISA for your child? You might not be prioritising the future wealth of your loved ones when they’re born, but getting the timing right to begin investing on their behalf can be more important than you think.

No Time Like the Present

Another great thing about Junior ISAs is that you’re able to open an account for your child from the moment they’re born. This means that you can potentially save for 18 years to build a sizeable pot for when they become adults.

This far greater time frame means that your investments have longer to grow and become available to reinvest at scale.

Whether you plan to save with a Junior Cash ISA or invest using a Junior Stocks and Shares ISA, you’ll be able to contribute up to a £9,000 annual allowance each tax year.

While this can help to create a substantial amount of money, you don’t have to use all of your child’s annual allowance to build potentially massive returns once they become adults.

Because all ISAs are tax-efficient, your child won’t pay any tax when it comes to withdrawing their funds later down the line. All earnings and even dividends are exempt from taxation, making it far easier to really make your investments work for you.

Unlocking Compounding

The real reason why it pays to get started sooner rather than later in saving for your child’s future is because of compounding.

Compounding works by using your earnings to reinvest your money over time, creating a snowball effect that can help your child’s portfolio grow to far higher proportions.

If you would prefer to save rather than invest money for your child, the same process works with compound interest, which uses the interest you receive to grow their savings.

To see how compounding works, let’s imagine you’ve set up a JISA and are making £50 contributions each month, and your child’s investments are growing 10% each year. After five years, you will have contributed £3,000 in total, but you will have £3,871.85 in your account thanks to your compounded earnings.

Now imagine this level of growth over a full 18-year period, and you can really get to grips with how significant compounding is, even if you don’t plan on contributing the full £9,000 each year.

Family Support

One common concern when it comes to starting Junior ISAs is the fear that you won’t have enough money to keep up with your contributions. After all, it can be hard to budget when you’ve just welcomed a new arrival into your home.

But one of the great things about JISAs is that anyone can make contributions. This means that family and friends can all make deposits into Junior ISAs to boost your child’s account at a time when their contributions can make a big difference later on.

It’s Never Too Early (or Late)

If you’re able and comfortable with locking away funds for a significant amount of time, getting started as soon as possible can be a great way to grow your child’s wealth with a JISA. However, even if your youngster is growing up already, you can still make contributions in a way that can really provide them with the best start to their adult lives.

JISAs can be opened at any point before your child turns 18, and even if you don’t have time to build them a six-figure portfolio, they can still become a strong nest egg for the future. Another advantage is that they can teach your child some valuable hands-on skills about saving and investing.

With the help of compounding, your child can be handed the best start in life if you’re able to set them up with a JISA with the future in mind.