Trump Account vs. Roth IRA for Kids: The Age 18 Conversion Play

A Roth IRA beats a Trump Account on taxes, because qualified Roth growth is never taxed while Trump Account growth is taxed as ordinary income. But a Roth requires earned income, and a baby has none. The Trump Account’s real value is as a bridge: it grows from birth, then can be converted to a Roth IRA in the child’s first low-income adult years. Here’s how the 2 accounts compare, and how the conversion play works.

Key Takeaways:

• A Roth IRA requires earned income. A Trump Account can be funded from birth. They cover different years of childhood.

• Roth growth is tax free. Trump Account growth is tax deferred and taxed as ordinary income at withdrawal.

• Starting the year the owner turns 18, a Trump Account can be converted to a Roth IRA.

• The conversion is cheapest in the owner’s first independent, low-income years, after kiddie tax rules stop applying.

• Once a teenager has real earned income, new dollars generally do more in a custodial Roth IRA.

Why does a Roth IRA usually win on taxes?

Because of what happens on the way out. Qualified Roth withdrawals in retirement are 100% tax free: contributions, growth, everything. A Trump Account’s earnings, plus its federal seed and any employer or charity money, come out as ordinary income. Same investments, same decades of compounding, very different final tax bills.

A Roth has structural advantages beyond that: no required minimum distributions for the owner, no tax drag ever, and contributions (not earnings) can be withdrawn any time without tax or penalty, which makes it more forgiving than most people realize.

So why not just open a Roth IRA for your child?

Because your child needs earned income to contribute, and contributions are capped at the lesser of their earned income or the annual IRA limit. A newborn can’t fund a Roth. A 9-year-old usually can’t either. A teenager with a W-2 job or legitimate self-employment income can, and for that teenager, a custodial Roth IRA is one of the best accounts in the entire tax code.

The Trump Account exists precisely in the gap: it accepts up to $5,000 per year from birth with no earned income requirement, plus the $1,000 federal seed for eligible newborns. From birth to the first paycheck, it’s the only retirement-style account in the game. What Is a Trump Account ? 

How does the age 18 Roth conversion strategy work?

Starting the year the child turns 18, the Trump Account follows traditional IRA rules, which means it can be converted to a Roth IRA. The owner pays ordinary income tax on the taxable portion of the conversion (the growth, the seed, and any employer or charity contributions), and after that, all future growth is permanently tax free.

The reason this can be a bargain: a 19-year-old or a 22-year-old fresh out of school is often in the lowest tax bracket of their entire life. Converting during those years means paying tax on the account at the cheapest rates the owner may ever see, in exchange for never paying tax on it again. Skip the conversion, and the account remains tax deferred, building an ordinary income tax bill that follows the owner into retirement, with no step-up in basis for
heirs.

What can go wrong with the conversion?

2 main traps. The first is the kiddie tax. If the owner is under 19, or under 24 and a full-time student who isn’t self-supporting, unearned income above the annual threshold gets taxed at the parents’ marginal rate instead of the child’s. A conversion executed while the kiddie tax applies can be taxed at the parents’ top bracket, which defeats the entire strategy. The clean window is usually the first year or 2 after the child is genuinely independent: out of school, working, filing on their own.

The second trap is paying the conversion tax from the account itself, which shrinks the amount that gets the tax-free treatment. The strategy works best when the family can cover the tax bill from outside money, which makes this as much a parent planning decision as a child one.

Timing also interacts with financial aid if the child is in college, because conversion income is still income. [[LINK → TA-5: Do Trump Accounts Hurt Financial Aid?]]

Which account should a working teenager fund?

The Roth, generally. Once real earned income exists, each dollar does more in a Roth IRA than in a Trump Account, because it exits tax free instead of tax deferred. A reasonable family playbook by stage: claim the Trump Account seed at birth and add contributions in the no-income years, then shift new dollars toward a custodial Roth once the teenager earns wages, then evaluate the Trump Account conversion in the first independent low-bracket years. [[LINK → TA-7: The Best Account for Your Child at Every Age]]

One more note for parents funding a teen’s Roth: the money contributed must be backed by the child’s real earned income, but the cash itself can come from anyone. Some families match their teen’s summer earnings dollar for dollar into the Roth. It’s a habit-building machine.

The bottom line:

Think of the Trump Account and the Roth IRA as a relay, not a rivalry. The Trump Account runs the first leg, from birth until earned income exists. The Roth runs the anchor leg. And the conversion at the handoff is where a well-advised family turns a taxable account into a tax-free one at the lowest rates their child may ever see.

Common Mistakes:

1. Converting while the kiddie tax still applies, which can push the tax to the parents’ top rate.
2. Paying the conversion tax from the account itself, shrinking the amount that becomes tax free.
3. Skipping the conversion entirely and leaving the child a lifelong ordinary income tax bill with no step-up in basis.
4. Funding a Trump Account for a working teen when a Roth IRA would exit tax free.
5. Converting during college aid years without checking the FAFSA income impact.