Home › Best Junior ISA Providers
Best-ofNot every UK platform offers Junior ISA. This guide compares the platforms that do — HL, Vanguard Investor, AJ Bell — for parents wanting to open a JISA for a UK child.
Reviewed July 2026 · Reading time: ~10 minutes
Affiliate disclosure: approved partner links to Hargreaves Lansdown and InvestEngine may earn us a commission. See affiliate disclosure.
| Best for | Provider | Why | Action |
|---|---|---|---|
| Widest choice + support | Hargreaves Lansdown | Full JISA + adult wrapper range, research, phone team | Visit → |
| Vanguard-only JISA | Vanguard Investor UK | LifeStrategy access, low cost | Editorial mention |
| Balanced JISA choice | AJ Bell | Broad JISA fund range, lower fund fees than HL | Editorial mention |
A Junior ISA runs 18 years for a newborn. That's 18 years of compounding — small fee differences meaningfully change the terminal amount. But equally important: not every UK platform offers JISA. Fewer still offer both cash and stocks & shares JISA options in one place.
Full JISA offering including Stocks & Shares JISA with access to Vanguard LifeStrategy, mainstream ETFs, and individual shares. Parents can open at any time and manage contributions. Child takes over management at 16, full control at 18.
Fees: 0.45% custody on funds (tiered down at higher balances), capped £45/year on shares/ETFs. Fund dealing free.
Best for: parents who want everything under one login — adult ISA, SIPP, LISA, JISA, JISA — with research and phone support.
Full analysis in our HL review and our Junior ISA guide.
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Meaning: the natural comparison isn't HL vs InvestEngine for JISA — it's HL vs Vanguard vs AJ Bell.
0.15% platform fee capped at £375/year. Only Vanguard products but LifeStrategy is a genuinely reasonable JISA default. Cheapest UK JISA for pure-Vanguard portfolios.
0.25% custody on funds, £120/year cap on ETFs. Broader fund range than Vanguard, cheaper than HL. Solid middle-ground option.
For any child under about 10 years old (i.e. 8+ year horizon), Stocks & Shares typically wins by a wide margin. £9,000/year at 4% cash return over 18 years → ~£240,000. Same at 6% equity → ~£310,000. The gap is why most financial commentators recommend Stocks & Shares JISA for younger children.
Same principles as adult investing, but with 18-year horizon:
All-equity is defensible with an 18-year horizon.
For most UK parents wanting a JISA: Hargreaves Lansdown for widest choice, phone team, and single-login family wrapper management. Approved PennyWise partner.
Open account with Hargreaves Lansdown →
No — only parents or legal guardians can open. But grandparents can contribute up to the £9,000 annual allowance.
No. InvestEngine doesn't currently offer Junior ISA.
It automatically becomes an adult Stocks & Shares ISA in the child's name. Full control transfers to the child.
For children under 10, Stocks & Shares typically wins over the 8-18 year horizon. For older children, closer to 18, cash may reduce sequence risk.
Yes — a child can hold one of each. The £9,000 allowance splits between them.
UK's largest platform.
Read review →0% platform fee DIY ETFs.
Read review →Head-to-head.
Read comparison →Pension wrapper.
Open comparison →Tax-wrapped investing.
Open comparison →Full sector comparison.
Open comparison →Capital at risk. Investment returns are not guaranteed. Tax rules can change. Pennywise Finance is not authorised by the FCA. This is general information — not personalised advice.