A junior SIPP is a personal pension opened for a child, run by an adult until the child turns eighteen and then owned outright by them. It attracts tax relief in the same way an adult pension does. The catch, and it is the whole point of the product rather than a flaw in it, is that the money cannot be reached for decades.
How it works and who can pay in
A parent or guardian opens the account and controls the investments while the child is a minor. Anyone can contribute: grandparents and other relatives commonly do, and the contributions are treated as the child's own for tax relief purposes regardless of who wrote the cheque. At eighteen the child becomes the legal owner and takes over the investment decisions, though they still cannot withdraw anything. The account simply carries on as an ordinary personal pension from that point, with the same rules as any other.
The lock is the feature
HMRC's guidance on GOV.UK states that when you can take money from a pension pot depends on the scheme's rules but is usually after you are 55, and that minimum age is legislated to rise. A child starting one today will be waiting more than half a century. That is why a junior SIPP is not a way to save for a deposit or university and should never be chosen for a goal with a date attached. What it buys is time, which is the one input in compound growth that cannot be bought later at any price.
Junior SIPP or Junior ISA
They answer different questions. A Junior ISA is available to the child at eighteen and can be spent on anything, which makes it the right vehicle for education, a car or a deposit, and also means it can be spent on anything. A junior SIPP cannot be reached for decades, which removes that risk and creates a different one, that the money is locked away from a family that later needs it. Many people use both rather than choosing, and the split is a judgement about the family's own circumstances rather than about which product is better.
What this page does not decide
Whether a junior SIPP suits your family depends on your other savings, whether you can afford to lock money away for that long, and what you are actually saving for, none of which this site knows. A personal recommendation about it is a regulated activity and this site does not make one. It explains the mechanics and passes an enquiry to an authorised firm where somebody wants advice on their own facts.
Questions people ask about junior SIPP
Who can open a junior SIPP?
A parent or legal guardian opens and runs it while the child is under eighteen. Anyone can contribute into it, including grandparents and other relatives, and the contributions count as the child's own for tax relief purposes whoever actually pays them.
When can the child access the money?
Not for a very long time. HMRC's guidance on GOV.UK says access usually begins after age 55, and that minimum age is set to rise, so a child starting one now would expect to wait more than fifty years. At eighteen they own and control the account but still cannot withdraw from it.
Is a junior SIPP better than a Junior ISA?
Neither is better in the abstract because they solve different problems. A Junior ISA is spendable at eighteen and suits goals with a date. A junior SIPP cannot be spent for decades, which protects the money from being spent and also from being available if the family needs it.
Does a child get tax relief with no earnings?
Contributions to a child's pension are made net and relief is claimed by the provider in the normal way, within the limits that apply to a non earner. The exact allowance for someone with no relevant earnings is set by HMRC and a provider will confirm the current figure before an account is opened.