Investing for Children

Time is the most powerful force in investing, and children have more of it than anyone. Money invested for a newborn has eighteen years to grow before they can touch it, and far longer if it goes into a pension. That long runway turns even modest, regular contributions into meaningful sums, which is why investing for children is one of the most rewarding financial gifts a family can make.

This guide walks through the main ways to invest for a child in 2026, the Junior ISA, the junior SIPP, and bare trusts, along with the tax rules to know and the question every parent should think about: who controls the money, and when. If you are new to markets, our beginner’s guide to investing covers the fundamentals first.

Why invest for a child

The case for investing rather than simply saving comes down to two words: time and compounding. Over eighteen years, cash in a savings account is likely to be outpaced by inflation, whereas a diversified investment portfolio has historically grown well ahead of it, albeit with ups and downs along the way. The long time horizon is exactly what lets a child’s portfolio ride out market falls that would worry a short-term investor.

Compounding is the quiet engine behind all of this: the growth earns growth of its own, and given enough years the effect snowballs. A pound invested for a newborn has far longer to work than the same pound saved for someone in their forties, which is why starting early matters more than starting big. It is also why the choice of account, and keeping costs low, makes such a difference over so long a horizon; a single percentage point of extra charges, compounded over eighteen years, can quietly cost a meaningful slice of the final pot.

The Junior ISA

The Junior ISA (JISA) is the natural home for most children’s investing. You can pay in up to £9,000 per child in the 2025/26 tax year, and every penny of growth, interest and dividends is free of UK tax. There are two flavours, cash and stocks and shares, and a child can hold one of each, but the £9,000 limit covers both combined.

• A parent or guardian opens the account, but anyone can contribute, grandparents and family friends included.
• The money is legally the child’s and is locked away until they turn 18.
• At 18 the JISA automatically becomes an adult ISA, and the child gains full control.
• For an eighteen-year horizon, a stocks and shares JISA usually gives the best chance of real growth.

The one point that gives some parents pause is that the child gets unfettered access at 18. For most families that is fine (it is their money for university, a first car or a house deposit) but if you want more control, read on to bare trusts below.

One quirk worth knowing: a Junior ISA cannot be opened for a child who already has a Child Trust Fund, the account many children born between 2002 and 2011 were given. If that applies, you can transfer the Child Trust Fund into a Junior ISA to unlock the wider fund choice and often lower charges, well worth checking, as many of these old accounts sit forgotten in expensive default funds. Whichever wrapper you use, the £9,000 annual limit and the tax-free treatment are the same.

The junior SIPP

It sounds almost absurd to open a pension for a toddler, but a junior SIPP (self-invested personal pension) is one of the most tax-efficient gifts you can make. You can contribute up to £2,880 a year, and the government adds 20% basic-rate tax relief on top, grossing it up to £3,600, free money, even though the child pays no tax.

The catch is obvious: the money is locked away until the child reaches the minimum pension age, which is rising to 57 from 2028 and may climb further. But that six-decade time horizon is precisely what makes it so potent. A single £3,600 gross contribution at birth could, with long-term compounding, grow into a substantial five-figure sum by the time the child retires, long after you could have helped. Many families use a Junior ISA for the near term and a junior SIPP for the very long term.

There is a quiet inheritance-planning angle here too. Because pension contributions for a child count as gifts, funding a junior SIPP moves money out of your own estate while giving it the longest possible runway to grow, a double win for grandparents in particular. The trade-off is control and access: this is money the child truly cannot reach for decades, so it should be surplus to any funds the family might need sooner. Used alongside a Junior ISA rather than instead of one, it can be a remarkable long-term gift.

Bare trusts and other options

If you want to invest more than £9,000 a year, or keep some control past 18, a bare trust (sometimes offered as a “designated account”) is the usual route. The money legally belongs to the child, but you as trustee decide when to hand it over: there is no automatic release at 18. Bare trusts have no contribution limit, making them useful for larger gifts, though the tax treatment is less generous than a JISA.

For families thinking about passing on wealth more broadly, gifts into a child’s accounts also chip away at a future inheritance tax bill, a topic covered in our guide on reducing inheritance tax legally. Regular gifts made out of your normal income, and the £3,000 annual gift exemption, can move money to the next generation without ever entering the seven-year clock, and paying into a grandchild’s Junior ISA is a tidy way to use them.

Premium Bonds and ordinary children’s savings accounts have their place too (they are simple, capital-secure and easy for relatives to top up) but over an eighteen-year horizon their returns are very unlikely to match a diversified stock market investment. They suit money you might need at short notice or a cautious gift from a relative who dislikes any risk; for a child’s long-term nest egg, a stocks and shares Junior ISA usually does more of the heavy lifting. Remember that the value of investments can fall as well as rise, and your child could get back less than was paid in.

The tax rules to know

The Junior ISA and junior SIPP are refreshingly simple, everything inside them grows tax-free. The complication arises outside those wrappers, chiefly in bare trusts, because of the “£100 rule”.

For most families paying into a JISA or junior SIPP, none of this bites, the wrappers keep things clean. It is mainly larger bare-trust gifts that need a careful eye, and where a conversation with an adviser can pay for itself. Our personal tax planning guide puts the allowances in context. The neat consequence is that a grandparent, who is not caught by the £100 rule, can often invest more freely for a child than a parent can outside the wrappers, one reason gifts frequently flow down the generations rather than straight from mother or father.

How to get started

• 1

  Choose the right account

  A Junior ISA for money the child can use at 18; a junior SIPP for a very long-term gift; a bare trust for larger sums or more control.

• 2

  Pick a low-cost investment

  A globally diversified fund or a multi-asset fund keeps costs down and spreads risk, ideal for a long horizon.

• 3

  Set up a regular contribution

  Even £25 or £50 a month, invested consistently, harnesses pound-cost averaging and builds a real habit.

• 4

  Invite the wider family

  Grandparents can pay into the same Junior ISA: a birthday gift that could still be growing in eighteen years.

• 5

  Review it once a year

  Check the contributions, the allowance used and that the investment still suits the time horizon.

Investing for a child is one area where a little planning goes a very long way, and the accounts are simple enough for most parents to run themselves. If you would like help choosing investments or fitting a child’s pot into a wider family plan, Vetted Wealth can match you, free, with an independently vetted, FCA-regulated adviser through our investment management service. This is information, not personal advice, and investments can fall as well as rise.

Common questions on investing