Investing for Children UK Guide 2026

Junior ISA Explained

A Junior ISA (JISA) is the primary tax-efficient savings vehicle for UK children under 18. The annual allowance for 2026/27 is £9,000 per child, completely separate from the adult £20,000 ISA allowance. Any UK resident child under 18 can have a JISA — you do not need to be their parent to open one; grandparents, other relatives, or friends can contribute. The JISA can be a Cash JISA or a Stocks and Shares JISA, or a combination of both, as long as total contributions stay within £9,000. Growth is completely tax-free — no income tax on interest or dividends, and no capital gains tax. The child gains control of the JISA at age 18, when it converts to an adult ISA. This is both a benefit (they have a tax-free savings pot) and a potential drawback (they can withdraw the money at 18 without restriction). If you are concerned about the age-18 access, consider a child SIPP or a bare trust as alternatives. Many parents open a Stocks and Shares JISA to invest in a diversified global tracker fund, taking advantage of 18 years of compounded tax-free growth. A £100 monthly contribution invested from birth to 18 at 6% annual growth would produce approximately £40,000 — entirely tax-free.

Child Pension (SIPP for Children)

A child can have a SIPP (Self-Invested Personal Pension) from birth, even with no earned income. Anyone — parents, grandparents, other relatives — can contribute up to £3,600 per year (£2,880 net, with the government adding 20% tax relief to make it £3,600). This is a powerful long-term saving vehicle. The money is locked away until age 57 (rising to 58 from 2028), meaning a child's SIPP has 50+ years of potential compound growth. A one-off contribution of £2,880 (£3,600 after relief) at birth, growing at 6% annually for 57 years, could become approximately £80,000 tax-free at retirement. The child can withdraw 25% tax-free at pension age, with the rest taxable as income. The main downside is the long lock-in — you cannot access the money before age 57 without significant penalties. For most families, a JISA is a higher priority than a child SIPP because the money is available at 18 for education, a first home, or starting a business. However, if you have already fully used the JISA allowance, a child SIPP is an excellent additional tax-efficient vehicle. Contributions from grandparents are also a way to reduce their estate for inheritance tax purposes while benefiting the child's long-term future.

Child Trust Fund Transfers

Child Trust Funds (CTFs) were the predecessor to Junior ISAs, issued to children born between 1 September 2002 and 2 January 2011. If your child has a CTF, you can transfer it to a JISA for potentially lower fees and better investment options. CTFs typically have higher charges than modern JISAs and offer fewer investment choices. The transfer process is straightforward: open a JISA with your chosen provider and request the CTF transfer. The provider handles the paperwork, and the transfer should complete within 30 days. You can also keep the CTF and continue contributing up to £9,000 per year combined across both accounts. However, you cannot pay into both a CTF and a JISA in the same tax year — the £9,000 allowance is shared. Many parents choose to transfer to a JISA to access a wider range of low-cost tracker funds and ETFs. Major platforms offering JISAs include Hargreaves Lansdown, AJ Bell, Fidelity, and Vanguard. Compare ongoing platform charges (typically 0.15–0.45%) and dealing costs before choosing. Some providers offer free regular investing in JISAs, which is ideal for building a diversified portfolio over time.

Tax-Efficient Investing for Children

Children have their own tax allowances, but there are important rules to understand. The £100 parental settlement rule means that investment income from money gifted by a parent that exceeds £100 per child per tax year is taxed as the parent's income at the parent's marginal rate. This applies to interest, dividends, and other investment income. Money from grandparents, other relatives, or friends is not caught by this rule — it is taxed as the child's income against their own allowances. For 2026/27, a child has a personal allowance of £12,570 (income tax), a personal savings allowance of £5,000 (for interest), and a dividend allowance of £500. This means children can earn significant investment income tax-free from non-parental gifts. To avoid the £100 rule, consider using a JISA where all growth is tax-free regardless of who contributes. Alternatively, use a bare trust or designated account where the money is clearly from grandparents. For capital gains, children have the same annual exempt amount as adults (£3,000 for 2026/27). A well-structured grandparent contribution plan can use each child's allowances fully without creating any tax liability. Always check the latest HMRC guidance on the parental settlement rules.

How Much to Save

How much you should save for a child depends on your wider financial priorities. Most advisers recommend securing your own retirement first — you cannot borrow for retirement, but children can access student loans and other support. After that, contributing to a JISA is a tax-efficient way to build a child's future wealth. A guideline: saving £50–£100 per month from birth to 18 at 6% annual growth produces approximately £20,000–£40,000. For a child SIPP, the £2,880 net annual maximum (£3,600 gross) is generous for most families. Consider splitting contributions: put most into a JISA (accessible at 18) and a smaller amount into a child SIPP (locked until 57). Avoid over-saving in a child's name if it risks affecting their entitlement to student finance or means-tested benefits. Student loans in England are not means-tested against parental savings for tuition fee loans, but maintenance loans are. If your child's JISA has £50,000 at 18, this is their asset and could affect their own benefit claims. Balance generosity with practicality — a JISA with £20,000–£30,000 at 18 gives a child a meaningful head start without creating unintended consequences.

Teaching Children About Money

Financial education is a valuable complement to investing for children. The UK national curriculum does not mandate personal finance as a standalone subject, so parents play a crucial role. Involve your child in the JISA journey: show them the quarterly statements, explain how compound growth works, and discuss the difference between saving and investing. The MoneyHelper website (backed by the UK government) offers age-appropriate resources for children. Consider giving a small monthly cash allowance alongside the JISA to teach budgeting. As children approach age 18 and gain control of their JISA, have open conversations about what the money is for — education, a first home deposit, or starting a business. Some families use a bare trust instead of a JISA to retain control beyond age 18, though this comes with different tax implications. Teaching children about FCA regulation, investment risk, and the difference between capital growth and income will prepare them to manage their own finances responsibly. The earlier you start these conversations, the more financially capable your child will be as an adult.

FAQs

Can I open a JISA for my grandchild?

Yes, anyone can open and contribute to a JISA for a child, not just parents. Grandparents, aunts, uncles, and family friends can all open a JISA as long as the child is under 18 and a UK resident. The £9,000 annual allowance is per child, not per contributor.

What happens to a JISA when the child turns 18?

The JISA automatically converts to an adult ISA at age 18. The child gains full control of the account and can withdraw the money or continue saving tax-free within the £20,000 adult ISA allowance. There is no restriction on how they use the funds.

Can I have both a JISA and a child SIPP?

Yes, you can have both. The JISA has a £9,000 allowance and is accessible at 18. The child SIPP allows up to £3,600 per year (£2,880 net) and is locked until age 57. They are completely independent with separate tax treatments and allowances.