UK Junior ISA Guide (JISA Rules, £9,000 Allowance, 2026)

What Is a Junior ISA?

A Junior ISA is a long-term tax-advantaged savings account for children. Any child under 18 who is a UK resident and has a National Insurance number can have a JISA. The account is opened and managed by a parent or legal guardian (the registered contact), but the money belongs to the child irrevocably — you cannot take it back. This irrevocability is important — unlike a savings account in your own name, once money goes into a JISA, it legally belongs to the child and must be passed to them at age 18. The annual contribution limit for 2026/27 is £9,000, which is separate from your own adult ISA allowance. This means you (the parent) can still use your full £20,000 ISA allowance while also contributing to your child's JISA. The money grows tax-free within the JISA — no income tax on interest (Cash JISA) and no Capital Gains Tax or dividend tax on investments (Stocks and Shares JISA). Unlike a pension, there is no government top-up, but the power of compounding over 18 years is enormous: contributing the full £9,000 each year from birth to 18 with 5% annual growth would produce approximately £260,000 tax-free. Even at a more modest £100 per month, with 6% growth from birth, the pot would reach over £38,000 by age 18. The child gains control at age 18, when the JISA automatically becomes an adult ISA. This is a significant milestone that parents should prepare for well in advance. ISA allowance rules →

Cash JISA vs Stocks and Shares JISA

A Cash JISA works like a tax-free savings account for your child. Interest is paid tax-free, with current rates around 3–5% depending on the provider. Cash JISAs are straightforward and capital-secure (protected by FSCS up to £85,000). They suit shorter time horizons or parents who want certainty. A Stocks and Shares JISA invests in the stock market through funds, ETFs, or individual shares. With an 18-year time horizon from birth, the stock market has historically delivered 7–10% annualised returns, significantly outperforming cash after inflation. Contributing £100 per month to a Stocks and Shares JISA earning 7% could grow to over £40,000 by age 18 — versus approximately £25,000 in a Cash JISA at 4%. The downside is volatility — stock markets can fall, and the value of a Stocks and Shares JISA could be lower than contributions if the market drops just before the child turns 18 (known as sequencing risk). Many providers offer both types, and you can have both a Cash JISA and a Stocks and Shares JISA (combined £9,000 limit) or stick with one. Stocks and Shares ISA →

Opening a JISA

To open a Junior ISA, the child must have a UK address and a National Insurance number. The parent or guardian (registered contact) manages the account online. Popular providers include Fidelity, Hargreaves Lansdown, OneFamily, AJ Bell, Vanguard, and Monument Bank. You will need your own identification (passport or driving licence), your child's birth certificate or passport, and their National Insurance number. The application is done online — you choose the provider, select Cash or Stocks and Shares (or split), and set up funding. You can contribute lump sums or set up regular monthly direct debits. Anyone can contribute to a child's JISA — parents, grandparents, other family members, or friends — but the total cannot exceed £9,000 per year. The registered contact manages investment choices and withdrawals (though the money belongs to the child and can only be withdrawn in limited circumstances before age 18). The child can also have a separate Junior ISA for 16–17 year olds, which is an adult Cash ISA that 16–17 year olds can open with their own £20,000 allowance (on top of the JISA). Cash ISA guide →

Child Trust Fund Transfer

Child Trust Funds (CTFs) were introduced in 2005 for children born between 1 September 2002 and 2 January 2011. Parents received a £250–£500 government voucher to start the account. CTFs still exist, but you can now transfer a CTF to a Junior ISA, which typically offers lower fees and a wider investment choice. The process is a formal transfer between providers — your JISA provider handles the paperwork. You cannot hold both a CTF and a JISA for the same child, so transferring the CTF to a JISA effectively consolidates the accounts. Many older CTF accounts charge higher annual fees (1.5%+ versus 0.5% for some JISAs) and offer limited investment options. Transferring to a JISA can save hundreds of pounds in fees over the remaining years. To transfer, choose your preferred JISA provider, request a CTF transfer, and the provider will handle the rest. The transfer should complete within 30 days. Once transferred, the old CTF is closed and you manage everything through the JISA provider. ISA transfer guide →

Contributions

The annual JISA contribution limit for 2026/27 is £9,000 per child. Anyone can contribute — parents, grandparents, godparents, aunts, uncles, family friends — but the total from all sources cannot exceed £9,000 per tax year. If you exceed the limit, HMRC may charge tax on the excess. Contributions do not affect the contributor's own ISA allowance — the £9,000 JISA allowance is completely separate. If you have multiple children, each child has their own £9,000 allowance. Using the full allowance from birth to age 18 would mean investing £162,000 in total (plus investment growth). This is a powerful way to give a child a significant financial head start. Some parents contribute child benefit or family gifts directly into the JISA. You can also set up regular monthly contributions — £750 per month would fill the full £9,000 annual allowance. Even smaller contributions add up: £50 per month at 7% growth from birth would produce over £20,000 by age 18. The JISA is a tax wrapper — the child pays no tax on income or gains within the account, even if the investments grow substantially. ISA allowance details →

Access at Age 18

When the child turns 18, the Junior ISA automatically converts to an adult ISA. The registered contact loses control, and the now-adult child gains full access. At this point, the new adult ISA holder can: withdraw all the money tax-free (and spend it on anything), keep the ISA and continue contributing as an adult ISA (using their own £20,000 annual allowance), or transfer the ISA to a different provider. Many providers default to a cash holding at age 18 if the child takes no action. The transition is a critical moment — an 18-year-old receiving a large sum may not make the best financial decisions. Parents should plan for this well in advance: discuss the responsibility, consider setting up a meeting with a financial advisor, and perhaps agree on a plan for the money (e.g., keep it invested for a house deposit, use for university, or start a business). Some parents save in their own ISAs or general investment accounts rather than a JISA specifically to maintain control beyond age 18, though this uses their own allowance and has tax implications. Adult Stocks and Shares ISA →

Tax Considerations for Junior ISAs

Junior ISAs are genuinely tax-free, but there are some important nuances to understand. The child pays no tax on any income or gains within the JISA — interest, dividends, and capital gains are all tax-free. This is different from a child's regular savings account, where interest over £100 per year is taxed at the parent's marginal rate. A JISA completely avoids this £100 rule. The JISA is also separate from the parent's ISA allowance — contributing to a JISA does not affect your own £20,000 ISA limit. However, there are inheritance tax (IHT) considerations. If you contribute more than the annual gift allowance (£3,000 per year under the normal expenditure out of income rules) to your child's JISA, the gift may be subject to IHT if you die within 7 years. Regular contributions that come from surplus income are generally exempt from IHT if you maintain a consistent standard of living. The JISA forms part of the child's estate when they die (before age 18), though this is uncommon. If the child dies after age 18 but before accessing the funds, the funds are part of their estate for IHT purposes. Parents should keep records of JISA contributions for IHT planning purposes. Despite these complexities, the JISA remains one of the most tax-efficient ways to save for a child's future. Choosing the right JISA provider involves comparing fees, investment choice, and features. Cash JISAs are offered by many high-street banks and building societies. Rates tend to be lower than adult Cash ISAs but the interest is tax-free. Stocks and Shares JISAs are offered by platforms like Hargreaves Lansdown, AJ Bell, Fidelity, and Vanguard. Look for low platform fees (0.15%–0.45%), a good range of investments appropriate for children, and no dealing charges on regular contributions. Some providers offer ready-made JISA portfolios tailored to a child's time horizon, which can be a good choice for parents who want a hands-off approach.

FAQs

Can I open a JISA for a child who is not my own?

Only a parent or legal guardian can open a JISA. However, once the account is open, anyone can contribute to it — grandparents, other family members, friends — as long as the total stays within the £9,000 annual limit.

What taxes apply to a Junior ISA?

None. Interest, dividends, and capital gains within a JISA are completely free of UK income tax and Capital Gains Tax. Unlike a child's regular savings account (where interest over £100 is taxed at the parent's rate), JISA growth is genuinely tax-free.

Can I withdraw money from my child's JISA before they turn 18?

In very limited circumstances, the registered contact can request a withdrawal: if the child is terminally ill or dies. Otherwise, the money is locked until age 18. This is by design — the JISA is intended as a long-term savings vehicle for the child's future.

What happens if my child moves abroad?

If your child moves abroad, they can keep an existing JISA but no further contributions can be made while they are non-UK resident (unless they remain UK resident for tax purposes). The account remains open and continues to grow tax-free until age 18.

Can I have both a JISA and a pension for my child?

Yes. You can also open a Junior SIPP (pension) for your child, which has its own £3,600 annual contribution limit. The JISA and Junior SIPP are completely separate — you can contribute up to £9,000 to the JISA and up to £3,600 to a Junior SIPP in the same tax year.