Answers · UK 2025/26
What happens to a Child Trust Fund when it matures at 18?
A Child Trust Fund automatically matures on the child's 18th birthday, at which point they gain full legal control of the funds and can withdraw or reinvest them as they choose. If no action is taken, most providers automatically roll the funds into a protected, tax-free "matured CTF" account (or a standard ISA), preserving the tax-free status until the young person decides what to do with it.
Full answer
Child Trust Funds (CTFs) were long-term tax-free savings accounts opened by the government for every child born in the UK between 1 September 2002 and 2 January 2011, and understanding what happens as these accounts reach maturity matters both for the young adults now reaching 18 and for parents who set them up years ago. **What a Child Trust Fund is** CTFs were opened either by parents or, if parents didn't act, automatically by HMRC on the child's behalf, with an initial government contribution (the specific amount varied depending on when the account was opened and, for lower-income families, whether an additional top-up applied) -- family and friends could then contribute up to an annual limit, with all growth and returns entirely free of Income Tax and Capital Gains Tax, similar to a Junior ISA. **Automatic maturity at 18** A Child Trust Fund automatically matures on the account holder's 18th birthday -- at this point, legal ownership and control of the funds transfers entirely to the young person themselves (previously the account, though technically belonging to the child throughout, was managed by a registered "responsible person", usually a parent). No action is required to trigger maturity; it happens automatically based on the child's date of birth. **What happens if no action is taken** If the newly-18 account holder doesn't actively do anything with the matured funds, most CTF providers will automatically transfer the balance into a protected, tax-free account (sometimes marketed as a "matured CTF account" or automatically rolled into an adult ISA) that preserves the tax-free status of the funds -- this ensures the tax-free wrapper isn't lost purely due to inaction, though the specific default option and any associated fees or interest rates vary by provider, so it's worth checking rather than assuming the default arrangement is the best available option. **Options available to the young adult** Once a CTF matures, the account holder can choose to: leave the funds where they are (often in the provider's default matured account); transfer the balance into a Stocks & Shares ISA or Cash ISA with the same or a different provider (this can generally be done without losing the tax-free status, since a like-for-like transfer between tax-free wrappers is permitted); or withdraw some or all of the money to spend or use as they wish, since they have full legal control from age 18. **Finding a "lost" Child Trust Fund** A significant number of Child Trust Funds, particularly those opened automatically by HMRC for families who didn't engage with the scheme at the time, have effectively been "lost" or forgotten by families over the years -- young adults (or their parents, to help them) who aren't sure whether they have a CTF, or who don't know which provider holds it, can use the free HMRC online tool to trace it, which is well worth doing given even small initial government contributions will have grown, tax-free, for up to 18 years. **No obligation to move the money into an ISA immediately** There's no strict deadline forcing the young adult to actively transfer the funds elsewhere immediately at 18 -- since most providers roll matured CTFs into a protected tax-free account automatically, there's no immediate loss of the tax-free status simply from taking time to decide what to do with the money, though comparing the default account's interest rate or investment approach against alternatives is worthwhile before deciding to leave money there long-term. **Why comparing providers still matters** The default "matured CTF" account interest rate or investment charges offered automatically by the original provider aren't always competitive compared with what's available by actively transferring into a modern Stocks & Shares ISA or a competitive Cash ISA elsewhere -- young adults inheriting a matured CTF balance should treat the decision similarly to any other significant savings decision, comparing available options rather than assuming the default is necessarily the best choice. **Practical tip** If you turned 18 (or know someone who did) after 2020 and aren't sure whether a Child Trust Fund exists, use HMRC's free CTF tracing tool to check, since many families with young adults born in the relevant window (2002-2011) may be unaware of an account that has been quietly growing tax-free for up to 18 years.
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This answer is informational only and does not constitute financial, tax or legal advice. Figures are for the 2025/26 UK tax year. See our methodology and sources.