What Happens When Your Child Turns 18: The Custodial Account Handoff
What transfers when — UTMA, Trump Account, Roth IRA, 529 — and how to make the handoff a milestone, not a surprise.
Key takeaways
- A UTMA transfers at the age of majority — 21 in most states, 18 in some, a few up to 25 — and on that day your child can withdraw the whole balance.
- There's no approval step and no clawback, which is the part parents most wish they'd prepared for when the balance is large.
- Several accounts change hands or change form at once, so it's worth knowing the order in advance.
For years you've been the one logging in, contributing, and keeping an eye on your kid's accounts. Around their 18th birthday, several of those accounts change hands or change form — some all at once. Knowing what shifts, and when, turns a potentially jarring moment into a milestone you can actually plan for.
The short answer: a UTMA or UGMA custodial account transfers to your child automatically at your state’s termination age, which is 18 or 21 in most states and up to 25 in some if you chose that when opening it. You can’t delay it or keep control past that date. The custodian asks the brokerage to retitle the account into the child’s name, and from then on it’s theirs. A custodial Roth IRA becomes a regular Roth IRA in their name, and a parent-owned 529 stays with you.
Account by account: what changes at 18
UTMA — it becomes their money
A custodial UTMA transfers to your child at the age of majority — 21 in most states, 18 in some, and a few let you specify up to 25. On that birthday, the account is legally theirs. They can log in, withdraw the balance, and do whatever they want with it. There's no approval step and no clawback. If the balance is large, this is the moment parents most wish they'd prepared for sooner.
Trump Account — it shifts into retirement-style treatment
The new federal Trump Account is designed to convert at 18 into a traditional-IRA-style account. The growth that built up tax-deferred keeps compounding, but the rules that govern it (and the tax on eventual withdrawals) start to look like a retirement account. The specifics live in our Trump Accounts guide — the headline for this milestone is simply that the account doesn't disappear — it graduates.
Custodial Roth IRA — it was always theirs
A custodial Roth IRA simply converts to a regular Roth IRA in your child's name. The money was always earmarked for them; now they're the account holder. Decades of tax-free compounding continue, and they take over the login. This is usually the smoothest handoff of the bunch.
529 — nothing forced changes
Unlike the others, a parent-owned 529 stays with you. Turning 18 doesn't transfer control. You decide when and how to use it for qualified education expenses, and you can still change the beneficiary. It's the one account on this list that doesn't flip.
The quick reference
| Account | What happens at 18 | Who controls it after |
|---|---|---|
| UTMA | Transfers to the child (or at 21/25 by state) | Your child, fully |
| Trump Account | Converts to retirement-style treatment | Your child, under retirement rules |
| Custodial Roth IRA | Becomes a regular Roth IRA in their name | Your child |
| 529 (parent-owned) | No change | You |
What to prepare before the birthday
- Know your state's majority age. 18 or 21 changes the timeline for the UTMA handoff entirely — confirm it so you're not caught off guard.
- Get the logins and paperwork in order. Your child will need access to the accounts that become theirs. Sort out usernames, two-factor, and any custodian forms ahead of time, not in a scramble.
- Have the conversation early — ideally years early. A teen who's watched the account grow and understands what's in it inherits context, not a surprise windfall. That difference is everything.
- Right-size expectations on the UTMA. If a large balance transferring at 18 worries you, that's a planning conversation to have with a tax or financial professional before the date, not after.
Make it a milestone, not a surprise
The families who navigate this well all do the same thing: they make the money visible for years beforehand. When an 18-year-old has spent a decade glancing at their own account — seeing it grow, asking questions, connecting the balance to real decisions — the handoff is a graduation, not a shock. That long runway is exactly what MemoryBank is built to give them — starting with seeing all your kid’s investment accounts in one place.
What to do this week
- Look up the age of majority in your state and mark the real handoff date — the kids’ accounts by state explorer shows it (plus your state’s 529 tax treatment) in one place.
- Make a short list of which accounts transfer and what each one needs.
- If your kid is a teen, start showing them the accounts now — give them runway.
- Keep everything in one view in MemoryBank so the handoff is a continuation, not a cold start.
MemoryBank is not a brokerage. It cannot receive, keep or transfer securities. Every purchase, transfer and withdrawal described here happens at the financial institution holding the account.
18 is also when credit starts to matter, so it helps to help your teen build credit before then. If family is planning a gift for the milestone, see these graduation money gift ideas.
Frequently asked questions
What happens to a UTMA when my child turns 18?
It transfers to the child at the age of majority — 21 in most states, 18 in some, and a few states let you specify up to 25. They can log in, withdraw the balance, and use it for anything, with no approval step and no clawback.
What happens to a Trump Account at 18?
It converts into a traditional-IRA-style account. The tax-deferred growth keeps compounding under retirement-account rules — the account graduates, it doesn't disappear.
Does a custodial Roth IRA change at 18?
It simply becomes a regular Roth in the child's name — the smoothest handoff of the bunch, since the money was always theirs.
Does a 529 transfer to the child at 18?
No. A parent-owned 529 doesn't change at 18 — you keep control and can still change the beneficiary. It's the one account that doesn't flip.
How do I prepare for the custodial account handoff?
Confirm your state's age of majority, get logins and any custodian paperwork in order ahead of time, and have the conversation early so a teen inherits context, not a shock.
Written by Josh Ackerman
Founder of MemoryBank. A computer scientist and M.B.A. with 20+ years of investing and technology experience, Josh built the first MemoryBank in his basement so his three kids could watch their own accounts grow. More about Josh →
See it in one place
MemoryBank shows your kid's UTMA, 529, Roth IRA, brokerage, and savings in one place — across every institution — and explains their accounts and how investing works in age-appropriate terms they actually understand. It runs in any browser and as an app on iPhone and Android.
Or get the app
Related guides
If Something Happens to You: Who Takes Over Your Kid’s Accounts
The UTMA, the 529 and the Roth each have a different answer. Three forms at the institution decide it, and most families haven’t filled them in.
Step-Up in Basis, Explained: What Your Kids Actually Inherit (and What They Don't)
Inherited stock resets to market value at death. Which of your kid’s accounts get that reset, which don’t, and what the viral version leaves out.
UTMA & UGMA Age of Majority by State: Full 50-State Table (2026)
The full state-by-state table — UGMA age of majority and UTMA trust-termination age — plus the states that let you extend to 25.
MemoryBank is a display and education tool, not a financial advisor. Nothing here is investment, tax, or legal advice. Verify program details with the IRS, your tax advisor, or a licensed financial professional before making decisions.