Why a grandchild's pension is a favourite grandparent gift
Grandparents fund children's pensions for a blend of reasons the products were almost designed for: the money is guaranteed to reach adulthood intact (nobody can raid it), every £80 given becomes £100 invested thanks to the child's tax relief, and gifts made in the right way leave the grandparent's estate for inheritance tax purposes. A gift that grows for fifty years, can't be squandered at 18, and trims a future IHT bill is a rare combination.
One rule shapes everything else: a grandparent cannot open the pension. Only a parent or legal guardian can set up and manage a junior SIPP. The grandparent's role is funder — the account must exist first, so the practical first step is a conversation with the child's parents. How the account itself works is covered in child SIPPs explained.
The mechanics: three steps
- 1. Parent opens a junior SIPP with a provider of the family's choice — see our best junior SIPP comparison.
- 2. Grandparent contributes — direct debit or lump sums, up to £2,880 per tax year per grandchild for full relief. Most platforms accept third-party payments by bank transfer with a simple reference.
- 3. HMRC adds 25% — the provider claims £720 on a full £2,880, so the child receives £3,600. The relief belongs to the child; the grandparent gets no personal tax deduction, but also needed none for the uplift to happen.
The inheritance tax angle
Contributions to a grandchild's pension are gifts, and the normal IHT gift rules decide whether they leave your estate immediately or after seven years:
| Exemption | How much | How it applies to pension gifts |
|---|---|---|
| Annual exemption | £3,000 per tax year (per giver) | Covers a full £2,880 contribution with room to spare; one previous year's unused exemption can also be brought forward |
| Normal expenditure out of income | Unlimited, if conditions met | Regular contributions from genuinely surplus income — not capital — can be immediately exempt with no upper limit |
| Small gifts | £250 per person per year | Only for recipients not already covered by another exemption |
| Potentially exempt transfers | Anything above the exemptions | Falls out of your estate if you survive seven years |
The normal expenditure out of income exemption deserves special attention from wealthier grandparents: if you establish a regular pattern of contributions paid from surplus income (income left after maintaining your usual standard of living), those gifts can be immediately outside your estate with no seven-year clock and no cap. The conditions are strict — regularity, income not capital, no impact on your lifestyle — and record-keeping matters, because your executors will have to evidence the pattern. This is squarely the territory where an FCA-regulated adviser earns their fee, particularly with pensions themselves due to enter the IHT net from April 2027 — see pensions and IHT from April 2027.
What a decade of grandparent gifting could build
Suppose a grandparent contributes £2,880 each year from a grandchild's birth to age 18 — £51,840 given in total, grossed up to £3,600 a year by tax relief. Assuming 5% annual growth after charges (an assumption for illustration, not a promise), the pot would stand at roughly £101,000 at 18 and — left untouched with no further contributions — around £679,000 at the grandchild's 57th birthday. Meanwhile up to 18 years of £3,000 annual exemptions have moved value out of the grandparent's estate: potentially saving 40% IHT on those gifts. Full compounding tables are in our junior pensions guide.
Timing and paperwork practicalities
A few habits make the gifting cleaner:
- Contribute early in the tax year where possible — the relief is claimed sooner and the money is invested longer, and you avoid the April scramble. The £3,600 gross limit runs per tax year (6 April to 5 April), with no carry-over of unused headroom.
- Pay the pension provider directly, referencing the child's account, rather than routing money through the parents' bank account — it keeps the gift trail unambiguous for IHT records.
- Write a short letter of intent when starting a regular pattern you mean to qualify as normal expenditure out of income. It isn't legally required, but stating the intention to give regularly from income helps executors evidence the exemption years later. HMRC's form IHT403 shows the income-and-expenditure analysis they will eventually complete — keeping those numbers annually takes minutes.
- Tell the parents what you're doing. Contributions affect the family's overall plan — a parent already funding the full £2,880 leaves no relief headroom for yours.
If the pension doesn't fit: nearby alternatives
A junior SIPP is the most tax-advantaged gift but the least flexible. Grandparents wanting earlier impact often blend it with a Junior ISA contribution (accessible at 18, £9,000 annual allowance, opened by the parents), premium bonds, or simply gifts toward school costs — which can themselves qualify as normal expenditure out of income. For passing on your own pension wealth rather than making lifetime gifts, a different toolkit applies: see leaving a pension to grandchildren.
Points to settle before the first payment
- Access age. The grandchild cannot touch the pension until at least 57 under current rules — realistically later for today's children. If you want the gift usable for university or a house deposit, a Junior ISA fits better; the comparison is in Junior ISA vs Junior SIPP.
- Irrevocability. Contributions cannot be reclaimed, whatever changes in family circumstances.
- Control passes at 18 — to the grandchild, not to you or the parents. They choose the investments thereafter (though still can't withdraw).
- Multiple grandchildren. The £3,600 gross limit is per child, so gifts can be spread across several junior SIPPs; your £3,000 annual exemption, though, is a single allowance across all your gifting.
- Keep records. Note dates, amounts and which exemption each gift uses — your executors will thank you.
None of these caveats undoes the core appeal: few gifts combine an automatic 25% government top-up, half a century of tax-sheltered growth, immunity from teenage spending, and a smaller taxable estate. For grandparents whose own retirement is comfortably funded, it is hard to give a pound that works harder.