Trump Accounts become traditional IRAs at age 18, triggering tax complications that families often overlook. The account operates under standard IRA rules after that threshold, meaning withdrawals of government contributions and investment gains are taxed as ordinary income.
A Roth conversion looks appealing because young adults sit in low tax brackets. But the kiddie tax rule disrupts this strategy for many families. Children under 18, 18-year-olds whose earned income doesn't cover more than half their support, and full-time students ages 19 through 23 who don't meet that earned-income threshold all fall under kiddie tax rules. For 2026, unearned income above $2,700 is taxed at the parents' rate, not the child's rate.
The pro-rata rule adds another layer. Families cannot convert only the tax-free basis portions of their Trump Account. If 47% of the account balance is taxable (as in a typical example with $5,000 annual contributions for 18 years), then 47% of every conversion dollar triggers tax. The IRS calculates this pro-rata separately for Trump Accounts and other IRAs held by the same person.
Timing the conversion dramatically affects the final tax bill. Converting $170,000 at age 19 as a dependent full-time student costs roughly $18,700 in federal tax. The same conversion spread over two years after graduation on a $45,000 salary costs about $13,300. Waiting until the young adult is no longer a dependent and the kiddie tax no longer applies reduces the federal tax to roughly $5,200. The difference exceeds $13,000 on the same account.
Roth conversion income also affects financial aid. The conversion income lands on the student's tax return, and FAFSA uses tax information from two years earlier. Student available income above allowances is assessed at 50% for aid eligibility. Large conversions in tax years feeding into financial aid applications can reduce need-based aid.
Families should document all contributions, including those from grandparents. After-tax dollars become basis and require Form 8606. A 529 plan remains the better choice for college savings due to tax-free qualified withdrawals and favorable FAFSA treatment. The Trump Account works better for money families don't expect to need for decades.
Families should discuss the conversion strategy early, not when tax returns are being prepared. The young adult owns the account from the beginning, so the conversion decision ultimately becomes theirs.
Treasury and the IRS continue developing rules. Several regulatory provisions remain reserved for future guidance, and some regulations are still proposed rather than final.