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Junior ISA Guide 2026/27: £9,000 Tax-Free for Under-18s

339days until the JISA deadline (5 April 2027)

A Junior ISA is the closest thing UK tax law offers to a tax-free trust for your child. The rules are simple: anyone can contribute up to £9,000 per tax year, every penny grows free of income tax and Capital Gains Tax, and the child cannot touch the money until they turn 18. Used well, a JISA can hand an 18-year-old a six-figure sum without ever paying HMRC.

The JISA allowance is separate from the adult £20,000 ISA limit, so funding both is genuinely additive. JISAs replaced Child Trust Funds in 2011, and existing CTFs can be rolled in. The choice that matters most is the wrapper: a Cash JISA pays interest, while a Stocks & Shares JISA invests in funds and ETFs. Over an 18-year horizon, the difference is usually decisive.

This page explains the rules, compares the two JISA flavours side-by-side, lists every UK platform that currently offers a JISA, and links to our deeper guides on contribution strategy, platform selection, and the JISA-vs-Junior-SIPP debate.

£9,000Annual JISA allowance (2026/27)
0–17Eligibility age (UK resident under 18)
Age 18Child gains full access to funds
Tax-freeNo income tax or CGT, ever

The Two Types of Junior ISA

A child can hold one Cash JISA and one Stocks & Shares JISA at the same time. The combined contributions across both must stay within the £9,000 annual cap. Choose by time horizon, not by gut feel.

Cash Junior ISA

Tax-free savings account in the child's name. Pays a fixed or variable interest rate, capital is never at risk, and FSCS-protected up to £85,000 per provider. Best when the child is close to 18 and the funds are likely to be spent on a near-term goal — university fees, a deposit, a first car. Over an 18-year horizon, however, cash interest typically lags inflation and equity returns by a wide margin.

Stocks & Shares Junior ISA

Tax-free investing in funds, ETFs, and shares chosen by the parent or guardian. Capital is at risk in the short term, but a long-running global equity index fund has historically delivered around 6–8% real annualised returns — meaningfully more than cash. With the maximum 18-year time horizon, a Stocks & Shares JISA gives the child compounding the best chance to do its job.

Eligibility & the Rules That Trip People Up

Who Qualifies

Any UK-resident child under 18 who does not already hold a Child Trust Fund. CTF holders can transfer the CTF into a JISA but cannot hold both at once. A parent or legal guardian opens the account; older children (16+) can sometimes open their own Cash JISA depending on provider rules.

The £9,000 Cap

Total contributions from all sources cannot exceed £9,000 in a tax year. Birthday payments from grandparents, godparent contributions, and parent payments all count toward the same cap. Unused allowance is lost on 6 April — there is no carry-forward.

The Money Belongs to the Child

Once paid in, a JISA contribution is legally a gift to the child. Parents cannot reclaim it. The child gains the right to manage the account at age 16 but cannot withdraw funds until age 18. At 18, the JISA converts to an adult ISA and the now-adult can do whatever they like with it — including spending the lot.

One of Each Type, Anytime

A child can hold one Cash JISA and one Stocks & Shares JISA simultaneously. They can be at different providers. You can transfer either type to a new provider, or convert from Cash to Stocks & Shares (or vice versa) without using the annual allowance — provided you use the formal transfer process.

What £9,000 a Year Could Become

The Junior ISA's real superpower is the time horizon. Eighteen years of compounding inside a tax wrapper is structurally rare — most adult savers never get the chance to deploy it. The numbers below assume contributions on the child's birthday each year and a single annualised return.

Annual contributionWrapper choiceAssumed returnValue at age 18 (illustrative)
£100/month (£1,200/year)Cash JISA3.5% AER~£30,000
£100/month (£1,200/year)Stocks & Shares JISA6% real~£40,000
£375/month (£4,500/year)Stocks & Shares JISA6% real~£150,000
£750/month (£9,000/year, max)Stocks & Shares JISA6% real~£300,000

Returns are illustrative and not guaranteed. Real-world fees, contribution timing, and market sequence affect outcomes materially. See the ISA growth calculator to model your own assumptions.

UK Junior ISA Platforms Compared

Every UK platform that offers a Junior ISA, sorted alphabetically. Fees shown are the headline platform and dealing charges — full per-account terms vary.

PlatformPlatform FeeDealing FeeJISA Type
AJ Bell0£5
Junior ISA
BestinvestReady-made Portfolios & US shares: 0£4
Junior ISA
Charles Stanley Direct0£10 per UK share/ETF/investment-trust trade, £4 per fund tra…
Junior ISA
Fidelity Personal Investing0Funds: free to buy, sell and switch
Junior ISA
FreetradeBasic: £0/month£0 — commission-free on all plans
Junior Stocks & Shares ISA
Hargreaves Lansdown0Funds from £1
Junior ISA
interactive investorFlat monthly fee: Core £5Funds: £3
Junior ISA
J.P. Morgan Personal Investing (formerly Nutmeg)0None — no per-trade dealing charges
Junior ISA
Moneybox0No dealing fees
Junior ISA
Moneyfarm0£3
Junior ISA
Vanguard InvestorUnder £32,000: £4/month£7
Junior ISA
Wealthify0None
Junior ISA

Most JISA providers shown are Stocks & Shares JISAs. For a Cash JISA, building societies (Coventry, Yorkshire, Skipton) typically offer the best AERs — see our savings hub and cash ISA comparison tool.

JISA Tools

Junior ISA Guides

Junior ISA (JISA) UK 2025/26: £9,000 Tax-Free Allowance, Rules and Best Providers for Your Child's Future

Three days. That is how long remains before the 2025/26 Junior ISA allowance expires on 5 April 2026. Every UK child under 18 has a separate £9,000 annual JISA limit — completely independent of the adult £20,000 ISA allowance — and unused allowance vanishes at midnight on 5 April. It does not roll over. A family maximising the JISA from birth could hand their child a six-figure sum at 18, entirely free of income tax, capital gains tax, and dividend tax. The maths is straightforward but the window is closing fast. With the Bank of England base rate at 3.75% since December 2025, cash JISAs pay up to 3.85% AER and stocks & shares JISAs charge as little as zero in platform fees. The case for acting before 5 April has never been simpler. This guide covers how JISAs work, who can open one, cash versus stocks & shares, how to transfer a Child Trust Fund, and which providers offer the best value right now. If you have already opened a JISA, skip straight to the platform comparison or deadline checklist.

Your Child's £9,000 Junior ISA Allowance Is Frozen Until 2030 — Here's How to Make Every Penny Count

The Junior ISA allowance has been frozen at £9,000 since 2020, and the Chancellor has confirmed it won't increase until at least 2030. Six years of inflation have eroded its real value by roughly 25%. A parent maxing out the JISA in 2020 was saving the equivalent of £12,000 in today's money. Now they're saving £9,000. That makes choosing the right account more important than ever. The gap between the best and worst children's savings rates is enormous — over 3 percentage points in some cases. A child with £9,000 in a top Junior Cash ISA at 3.85% earns £346.50 tax-free per year. The same amount in a high-street children's savings account at 1% earns £90. Over 18 years, that difference compounds into thousands of pounds. This guide breaks down every option for under-18 savings in 2026 — Junior ISAs, children's savings accounts, and current accounts for teens — with the exact rates and the tax rules parents actually need to understand.

Junior ISAs Explained: The £9,000 Tax-Free Head Start Most Parents Ignore

A child born today could have over £150,000 waiting for them at 18 — tax-free — if their parents maxed out a Junior Stocks and Shares ISA every year. At a 7% average annual return, £9,000 deposited annually for 18 years grows to roughly £152,000, of which £90,000 is pure investment gain. Zero capital gains tax. Zero income tax. Zero dividend tax. Yet most parents either don't know Junior ISAs exist, confuse them with the defunct Child Trust Fund, or default to a cash JISA paying 3.85% when their child won't touch the money for a decade. With 19 days until this year's £9,000 allowance expires on 5 April, here's what you need to know — and what to actually do about it.

Junior ISA Strategy: £9,000 a Year Tax-Free Could Give Your Child £200,000 by 18

The Junior ISA allowance is £9,000 for the 2025/26 tax year. Contribute the maximum from birth, invest in a global tracker, and your child could have over £200,000 waiting for them at 18 — completely free of income tax and capital gains tax. That's not fantasy maths. It's compound returns at 7% annualised over 18 years on total contributions of £162,000. The extra £38,000+ is pure growth, sheltered entirely from HMRC. Most parents contributing to a Junior ISA put in £50 or £100 a month and leave it in cash. That works, but it leaves enormous value on the table. Here's how to optimise every pound.

Junior ISA Analysis & Commentary

Junior ISA Deadline: 15 Days to Save Up to £9,000 Tax-Free for Your Child Before 5 April

The Junior ISA allowance resets on 6 April 2026, and any unused portion vanishes. Every UK child under 18 gets a separate £9,000 annual limit — entirely independent of the adult £20,000 ISA allowance — and contributions from parents, grandparents, and family friends all count towards it. With just 15 days until the 2025/26 tax year deadline, this is the window to act. A Junior ISA locks money away until the child turns 18, which sounds restrictive but is precisely the point. It removes the temptation to dip in, and the tax-free wrapper means no income tax on interest and no capital gains tax on investment growth. At current rates, a cash Junior ISA from Leek Building Society pays 3.85% AER, while a stocks and shares JISA through Hargreaves Lansdown charges zero platform fees and zero dealing charges. Whether you have £9,000 or £9 to spare, here is what you need to know to make the most of the remaining days.

Frequently Asked Questions

What is the Junior ISA allowance for 2026/27?

The Junior ISA allowance for the 2026/27 tax year is £9,000. It sits alongside — not inside — your own £20,000 adult ISA limit, so funding both is genuinely additive. Unused allowance cannot be carried over to the next tax year. See the main ISA hub for the adult ISA rules.

Can a parent withdraw money from a Junior ISA?

No. The money inside a JISA legally belongs to the child. Parents or guardians can manage the account but cannot withdraw funds. The child can take over management at age 16 but cannot withdraw money until age 18. The only exceptions are terminal illness or death, both of which require evidence and a formal application to HMRC.

Who can contribute to a Junior ISA — parents only or anyone?

Anyone can contribute — parents, grandparents, godparents, friends — as long as the total across all sources stays within the £9,000annual cap. Only a parent or legal guardian (the “registered contact”) can open and manage the account, but third-party contributions are unrestricted.

What happens to a Junior ISA when the child turns 18?

On the child's 18th birthday the JISA automatically converts into an adult ISA — a Cash JISA becomes a Cash ISA, a Stocks & Shares JISA becomes a Stocks & Shares ISA. The full balance keeps its tax-free status indefinitely and now falls under the adult £20,000 annual subscription limit for any new contributions. The (now) adult can withdraw, transfer, or continue contributing within the standard ISA rules.

Junior ISA vs Junior SIPP — which is better for a child?

A Junior ISA is accessible at 18, suitable for university costs, a house deposit, or a first car. A Junior SIPP is locked until age 57+ but receives 20% government tax relief on contributions up to £2,880 a year (which becomes £3,600 with the relief). For most families, a JISA covers near-term goals and a Junior SIPP layers on for very long-horizon retirement saving — the two complement each other rather than competing.

Are Junior ISAs included in inheritance tax?

Contributions to a JISA are treated as a gift from the contributor and may fall within the £3,000 annual gift exemption or the “normal expenditure out of income” exemption. The JISA itself sits in the child's estate, not yours. If the contributor dies within seven years of making the gift, taper relief rules may apply — speak to a qualified tax adviser for estate planning involving large JISA contributions.

Can I transfer a Junior ISA between providers or types?

Yes. JISAs can be transferred between providers without using the annual allowance. You can also transfer between types — Cash JISA to Stocks & Shares JISA or vice versa — provided the full balance moves at once. Existing Child Trust Funds (CTF) can also be transferred into a Junior ISA. Always use the formal transfer process via the receiving provider to keep tax-free status intact.

Junior ISA rules and the £9,000 annual allowance are based on HMRC guidance for the 2026/27 tax year. Tax treatment depends on individual circumstances and may change. This article is for informational purposes only and does not constitute financial advice. You should seek independent financial advice before making any investment decisions. GiltEdge is not regulated by the Financial Conduct Authority (FCA).