529 vs. UTMA vs. Roth: where to put money for your kid

You want to set money aside for a child. Great instinct — but the account you choose matters as much as the amount. A 529, a UTMA custodial account, and a custodial Roth IRA are taxed differently, treated differently by college financial aid formulas, and hand over control at completely different times. Picking the wrong one can cost thousands in taxes or lost aid. The right choice depends on one question: what job do you want this money to do?

The 529: earmarked for education

• Money grows tax-free and comes out tax-free when spent on qualified education: college tuition, room and board, books, up to $10,000/year of K–12 tuition, and student loan repayment (lifetime cap applies).
• Over 30 states offer a state tax deduction or credit for contributions to their plan.
• You — not the child — stay in control forever. You can change the beneficiary to a sibling, cousin, or even yourself.
• Parent-owned 529s are treated gently by financial aid: assessed at a maximum of 5.64% in the federal aid formula, versus 20% for assets in the child's name.
• The catch: non-education withdrawals pay income tax plus a 10% penalty on the earnings portion. This is education money, full stop — though up to $35,000 of leftover funds can now be rolled into the beneficiary's Roth IRA over time, subject to annual limits and a 15-year account age requirement.

The UTMA: flexible, but it becomes theirs

A UTMA custodial brokerage account can hold anything and be spent on anything that benefits the child — no education requirement. The tradeoffs are real, though. The first $1,350 or so of annual investment income is tax-free and the next chunk is taxed at the child's rate, but beyond that the 'kiddie tax' kicks in at the parents' rate. UTMA assets count as the student's own in aid formulas, reducing aid eligibility by 20 cents per dollar. And at 18 or 21 (state-dependent), the account legally becomes the child's — to spend on grad school or a very questionable car, and you get no vote.

The custodial Roth IRA: the long game

If your kid has earned income — a real job, documented babysitting or lawn-mowing money — they can contribute to a Roth IRA up to what they earned. It's the most powerful option per dollar because of the time horizon, retirement accounts are ignored entirely by financial aid formulas, and contributions (not earnings) can be withdrawn anytime tax- and penalty-free, which makes it a stealth emergency fund. The limitation is the earned-income requirement: you can't fund it for a 7-year-old with no job.

The decision framework

1. College is the goal and you want control: 529, opened by a parent. Grab your state tax break if there is one.
2. The child has any earned income: custodial Roth IRA, up to their earnings, before anything else. The five-decade compounding window is unbeatable.
3. You want to give money with no strings and accept that it's theirs at 18–21: UTMA, kept small enough that kiddie tax and aid impact stay minor.
4. Grandparents helping out: contribute to the parent-owned 529. Grandparent-owned 529s work too, and under the current FAFSA, withdrawals no longer count against the student.
5. Unsure and the child is young: 529 first. The Roth rollover escape hatch and beneficiary flexibility have made 'what if they don't go to college' a much smaller risk than it used to be.

The three accounts at a glance

One practical note on getting started, because analysis paralysis is the real enemy here: the monthly numbers are smaller than most parents expect. At a 7% average return, $100/month from birth grows to roughly $43,000 by 18; $250/month reaches about $108,000. Starting at age 8 instead, $100/month gets to about $19,000 — still meaningful, but less than half. The account choice matters, and the paragraphs above should settle it in ten minutes. The start date matters more. Whichever account fits, the correct amount to begin with is whatever survives your budget this month, automated on the 1st.

And nothing forces a single choice. A common blended setup for a family with a working teen: the 529 receives the automated monthly contribution and any grandparent checks, the custodial Roth receives a parent match on every dollar the teen earns (up to their earned income), and a small UTMA holds the leftover birthday money that teaches investing. Each dollar lands in the account whose rules match its purpose — which is the entire discipline of family finance, taught by example.

The bottom line

Match the account to the job: 529 for education with control, Roth for any teen with a paycheck, UTMA for smaller no-strings gifts. Most families end up with a 529 as the workhorse and a custodial Roth the moment the first W-2 arrives. Start with whichever fits, automate a monthly contribution — even $50 — and let the calendar do the heavy lifting.