An 18th birthday changes who can instruct providers. Preparing identity checks and account access early helps avoid delays.
At 18, ownership and access are not the same
A Junior ISA belongs to the child from the day it opens. Accounts held only in a parent’s name may remain the parent’s property.
Rights matrix for common child savings
| Savings product | Legal owner | Who acts before 18? | What changes at 18? | Best first action |
|---|
| Junior Cash ISA | Child | Registered contact | Becomes adult Cash ISA; child takes control | Compare rate and transfer options |
| Junior Stocks and Shares ISA | Child | Registered contact | Becomes adult ISA; child takes control | Check risk and charges before selling |
| Child Premium Bonds | Child | Parent or guardian, then child from 16 under NS&I rules | Adult manages bonds directly | Update details with NS&I |
| Children’s bank account | Usually child | Depends on bank terms and age | Adult child normally controls it | Check account terms and access |
| Bare trust | Child has beneficial ownership | Trustees manage it | Beneficiary can usually call for assets at 18 in England | Read the trust documents |
| Parent’s sole-name account | Parent, unless a trust was created | Parent | No automatic change | Establish the intended gift and ownership |
The registered contact manages a Junior ISA before 18. They do not own the money or retain authority after adulthood.
Premium Bonds follow a different route
Child Premium Bonds belong to the child. At 18, they remain Premium Bonds rather than becoming an adult ISA.
Not every long-term product follows the Junior ISA maturity route. A Child Trust Fund belongs to the young person.
At 18, its value can normally be withdrawn or moved into an adult ISA. The provider’s maturity process may not create an adult ISA automatically.
The holder should check the available instructions. A Junior SIPP is different again.
A Junior SIPP holds pension money. You cannot normally access it at 18.
The normal minimum pension age should rise to 57 on 6 April 2028. A protected pension age may change this.
For Child Premium Bonds, update NS&I access with the adult holder’s own details. Do not treat this as an ISA transfer.
A bare trust beneficiary has a fixed beneficial entitlement. The handover age depends on the jurisdiction.
In England and Wales, a beneficiary can usually ask trustees for trust property at 18. The same age generally applies in Northern Ireland.
In Scotland, legal capacity is generally reached at 16. The trust deed and the assets still matter in practice.
Trustees should not assume that a bank’s process determines the outcome. Read the deed and check where the trust is governed.
Get legal advice if entitlement or capacity is unclear.
For parent-held savings, the account title is a key starting point. It is not always the full answer.
Money in a parent’s sole-name account is usually under that parent’s legal control. This remains true even when it was earmarked for a child.
A completed gift or clear trust can give the child beneficial rights. This can apply even where the parent runs the account.
Labels such as “for Jamie” do not alone prove a trust.
Before moving a large balance at 18, keep records of the money’s source. Keep any written gift or trust intention too.
Keep account statements. This helps avoid confusing ownership of child savings with an adult child’s control of an account.
Prepare access before the 18th birthday
Contact each provider one to three months before the birthday. Ask about identity, address and online registration needs.
A practical timeline from 16 to 18
At 18, log in personally and change any inherited passwords. Check the nominated bank account and read the maturity message.
Then choose between withdrawal and transfer.
From 16 to after 18:
16: consider becoming Junior ISA registered contact and check Premium Bonds access.
17: gather photo ID, proof of address and account references.
18: complete verification, take online control and compare keeping, transferring or withdrawing.
After 18: review the savings plan after the first month, once urgent spending decisions have passed.
Keep these documents ready
Keep account references and photo ID ready. Keep recent proof of address too.
Have any requested National Insurance details ready. Keep personal bank account details ready for the handover.
Fraud checks can pause withdrawals
Changing your address, phone number and bank details together can trigger checks. Use only official provider contact details.
Never share security codes you did not expect.
Keep the tax wrapper before moving money
A matured Junior ISA can stay an adult ISA. It can also move through a formal ISA transfer.
A formal ISA transfer keeps the tax wrapper. It does not use your annual allowance.
Compare the next five years, not one day
Cash may suit money needed within 12 months. Stocks and shares may suit money invested for at least five years.
| Choice after Junior ISA maturity | Best when money is needed | Value can fall? | Keeps tax shelter? |
|---|
| Leave it in adult Cash ISA | Soon or uncertain | No market fall | Yes |
| Transfer to another Cash ISA | Soon, but a better rate is available | No market fall | Yes, if provider transfer is used |
| Transfer to Stocks and Shares ISA | Five years or more | Yes | Yes, if provider transfer is used |
| Withdraw to bank account | A known immediate purpose | No market fall after withdrawal | No, unless later resaved within allowance |
Premium Bonds are a separate choice
Premium Bonds offer tax-free prizes instead of guaranteed interest. Keeping them or moving proceeds into an ISA depends on the young adult’s goals.
Parents can support without controlling
Parents can help compare options and discuss risk. The adult account holder must make the decision.
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This Junior ISA handover does not apply to savings only in a parent’s name. It also does not apply where a trust deed sets different terms. It may not apply if the young adult lacks mental capacity. In England and Wales, managing an adult’s money may need Court of Protection deputyship or other legal authority. Scotland and Northern Ireland have different legal rules. Get specialist advice before moving money.
Frequently asked questions
Can my parent withdraw my Junior ISA money after I turn 18?
No, a parent normally cannot instruct a Junior ISA provider once you are 18. The account becomes your adult ISA. The provider will usually need your identity checks and instructions.
Should I withdraw a Junior ISA at 18 or transfer it?
Transfer it if you want to keep the money in an ISA. This keeps its tax-free status.
Withdrawing first may limit what you can put back. You can only resave up to your available annual ISA allowance.
Do child Premium Bonds become an ISA at 18?
No, child Premium Bonds remain Premium Bonds when the holder turns 18. You can keep them or cash them in.
You can pay the proceeds into an ISA. Your allowance must allow this.
Does the £100 parental tax rule apply to a Junior ISA?
No, the parental £100 rule does not apply to Junior ISA interest or gains. It can apply to taxable income from ordinary savings.
This rule concerns a parent’s gift to an unmarried minor.
The essentials:- A registered contact manages a Junior ISA before 18 but never owns the money.
- Complete identity, address and online-access checks before the birthday where possible.
- Use an ISA transfer, rather than a withdrawal, when keeping the tax-free wrapper matters.
- Check trust deeds and parent-held accounts separately because their ownership rules can differ.
Learn more
Here are some additional resources on this subject:
