What this guide covers
A Junior SIPP is a UK pension wrapper for a child. Pay in up to £2,880/yr net, HMRC adds £720 in basic-rate tax relief automatically — £3,600 lands in the pot for £2,880 out of pocket. Locked until age 57 (rising to 58 by 2028, and likely 58–60 by the time today's children retire). The most powerful long-horizon gift any grandparent can make.
How a Junior SIPP works
A Self-Invested Personal Pension (SIPP) is a tax-protected pension wrapper. The "Junior" version is identical legally — just opened in a child's name with a parent or legal guardian acting as the registered contact until the child turns 18.
The headline mechanic: pension tax relief. The government tops up every contribution at the basic rate of Income Tax (20%), even for a child with no income.
| You pay in | HMRC adds | Total in pot |
|---|---|---|
| £80 | £20 | £100 |
| £800 | £200 | £1,000 |
| £2,880 | £720 | £3,600 |
£3,600/yr is the maximum that can go into a Junior SIPP for someone with no earnings. The £2,880 net cap reflects that ceiling working backwards.
The tax relief lands automatically via the provider within 8–10 weeks of each contribution. No paperwork. No Self Assessment.
Why this matters more than a JISA over 55 years
The same £2,880/yr into a Junior SIPP — £3,600/yr after tax relief — compounded for 55 years at a 5% real return:
| Approach | Annual contribution | Tax uplift | Pot at age 57 (5% real) |
|---|---|---|---|
| JISA only, 0–18 then nothing | £2,880 | £0 | ~£195,000 |
| JISA 0–18 then the child contributes 18–57 | £2,880 | £0 in JISA | Variable, depends on adult contributions |
| Junior SIPP 0–18 then nothing | £2,880 | £720/yr | ~£245,000 |
| Maximum Junior SIPP 0–18 + standard adult pension after | £2,880 then more | £720/yr then 20-40% | £700k+ |
The 25% effective contribution uplift (£720 on £2,880 = 25% boost) is irreplaceable for the years your child has no earned income. Once they start earning, their own pension takes over with tax relief on their own contributions.
When the child can access it
The minimum pension access age in the UK is currently 55, rising to 57 in April 2028. For a child born in 2026, the realistic earliest access age will be 57 or 58.
This is the trade-off: the Junior SIPP is the longest-duration savings wrapper in UK law. Money put in for a newborn cannot be touched for 55+ years. That sounds extreme, but:
- The pot is fully owned by the child from age 18 onward, but they cannot withdraw early without a 55% penalty
- It cannot be assigned, gifted, used as collateral, or spent in any way before pension age
- This protects the pot from impulse decisions at 18, 25 or 30 — the JISA doesn't
Choosing a Junior SIPP provider
Fewer providers offer Junior SIPPs than JISAs. The main UK options in 2026:
| Provider | Account fee | Fund range |
|---|---|---|
| AJ Bell Youinvest Junior SIPP | 0.25% capped at £10/mo | Full UK / global funds |
| Hargreaves Lansdown Junior SIPP | 0.45% on funds | Vast fund range, easy app |
| Fidelity Junior SIPP | 0.35% | Solid range, lower fees on funds >£25k |
| Interactive Investor Junior SIPP | £5.99/mo flat | Flat fee cheapest for large pots |
For most accounts under £25,000, the percentage-fee providers (AJ Bell, Fidelity) are competitive. For larger gifts that grow over decades, the flat-fee model (Interactive Investor) wins.
Investment choice: a single low-cost global tracker (Vanguard FTSE Global All Cap, HSBC FTSE All-World, iShares MSCI ACWI) for the simplest 55-year strategy. No need to overcomplicate.
Who should consider one
- Grandparents. A £100/month direct debit from grandparent to grandchild's Junior SIPP costs ~£100 per month yet sees £125 land in the pot. For a newborn, 55 years of compounding can turn that contribution into a meaningful pension before the grandparent's 100th birthday.
- Parents with a JISA already maxed. If you're already putting £9,000/yr into a JISA and have more to give, the next £2,880 goes into a Junior SIPP for the tax relief alone.
- Parents wanting "untouchable" money. Where you're worried about the JISA being drained at 18, the SIPP locks the principal until the child is in their 50s.
- Estate planning. Pension contributions are usually exempt from Inheritance Tax. See the inheritance and trusts guide.
UK Tax Drag (2026). Junior SIPP — the £2,880 a year that becomes £3,600. Parent guide. Available at: https://kids.uktaxdrag.co.uk/parent-junior-sipp-explained.html
Curriculum mapping: see UK Financial Education Curriculum Map (Version 1.0). CC BY 4.0.