What happens to a Trump Account when your child turns 18

Updated September 8, 2026

Turning 18 isn't just a birthday for a Trump Account — it's the single biggest structural change the account ever goes through. The tax mechanics are covered in detail in our withdrawal rules guide; this is the practical side: what actually changes, what your now-adult child needs to do, and in what order to think about it.

What changes automatically, no action needed

It becomes a traditional IRA. In the calendar year your child turns 18, the account converts to a traditional IRA in their name — same custodian, same balance, new legal status.
Investment restrictions lift. Before 18, the account can only hold a low-cost fund tracking a broad U.S. stock index. Once it's a traditional IRA, it can hold anything the brokerage offers — individual stocks, bonds, other index funds, target-date funds.
Control passes to the account owner. The child — now legally an adult — owns the account outright. A parent who opened it no longer has any special access or authority over it.

What doesn't change

The money's tax character (basis vs. taxable) carries over exactly as it was — turning 18 doesn't reset or launder anything. The pro-rata rule still applies to any future withdrawal, and the 10% early-withdrawal penalty (with its usual exceptions) still applies below age 59½, same as any traditional IRA.

The checklist

Get account access transferred to your child. Before or right at 18, contact the custodian to set your child up with their own login. They're now the legal owner; make sure they can actually see and manage the account.
Decide: leave invested, convert to Roth, or withdraw? This is the highest-leverage decision in the account's life. Because most 18-year-olds are in a very low tax bracket, converting the traditional IRA to a Roth IRA now — paying a small one-time tax bill in exchange for permanently tax-free future growth — is usually the strongest option if there's no near-term need for the money. Model the actual numbers in our Roth conversion calculator before deciding.
If college is next, check the kiddie tax angle first. If your child is still your dependent and under 19 (or under 24 as a full-time student), a Roth conversion's taxable income can be taxed at your marginal rate instead of theirs under the kiddie tax rules — which can turn a cheap conversion into an expensive one. Spreading a conversion across a couple of tax years, or timing it around when dependent status ends, is worth running by a tax professional before pulling the trigger.
If withdrawing for tuition, know the FAFSA timing. A Trump Account withdrawal used for qualified higher-education expenses avoids the 10% penalty (ordinary income tax on the taxable portion still applies), but a large withdrawal shows up as income on the FAFSA's prior-prior-year lookback and can reduce financial aid eligibility two years later. If aid matters, talk to a financial aid office about timing before withdrawing.
If nothing urgent is happening, do nothing — but don't forget it exists. An 18-year-old with no immediate need for the money can simply leave it invested. The account behaves like any traditional (or newly converted Roth) IRA from here — it doesn't need to be touched to keep growing.

A word on whose decision this is

Legally, it's the 18-year-old's account and their call — not the parent's. Practically, this is usually the first real financial decision many of them will make, often before they've filed a tax return on their own. Walking through the tax mechanics and the conversion math together, rather than making the call for them, tends to go better than either extreme — ignoring it, or taking it over.

See the full tax breakdown in our withdrawal rules guide, or run the conversion numbers in the Roth Conversion at 18 calculator.

Educational content, not financial, tax, or legal advice. Reflects IRC §530A, IRS Notice 2025-68, and proposed regulations available as of September 2026; final rules may differ. Consult a qualified tax professional about your specific situation, especially around kiddie tax and financial aid timing.