Guide to Investing for Kids

The four people who gave her four different answers

Nadia’s daughter is three, and there’s a check on the kitchen table — five thousand dollars from Nadia’s mother, “for the baby’s future,” with no instructions on what that’s supposed to mean. In the week since it arrived, Nadia has collected four confident recommendations. Her sister swears by a 529. A coworker opened a custodial brokerage account and loves that it can be spent on anything. Someone in a parenting group said the smart move is a Roth IRA in the kid’s name. And her mother keeps forwarding articles about a brand-new “Trump Account” the government is seeding with $1,000.

Four people, four accounts, four different answers — and Nadia, who is not bad with money, feels stuck. She’s read enough to know these accounts aren’t the same, but not enough to know which one the check belongs in. So it sits there, earning nothing, while she waits to feel sure.

Here’s the thing none of the four told her: they aren’t wrong. They’re answering different questions. The reason the advice conflicts is that there’s no single best account for a child — there are four accounts, each built for a different job, and the check belongs in whichever one matches what Nadia actually wants the money to do.

There’s no best account, only the right job

The mistake hiding inside “what’s the best account for my kids?” is that it treats the four as competing answers to one question. They’re not. Each was designed for a specific job, and once you name the job, the choice mostly makes itself.

So the better question — the one that turns four confident opinions into a clear decision — is really two questions: What is this money for? And when will my child actually touch it? “School” has a different answer than “a head start on retirement,” which has a different answer than “whatever they need at eighteen.” Answer those, and you’re no longer choosing between accounts. You’re matching an account to a job you’ve already named.

We’ll walk the four jobs in a moment. But first, the step that comes before any of them.

Your oxygen mask goes on first

There’s a beat before the account question that’s easy to skip, because skipping it feels generous. Before you fund anything for your child, your own footing comes first: high-interest debt gone, an emergency fund in place, your own retirement on track. In the site’s order of operations, saving for a child’s future is Step 7 — deliberately after Step 6, getting your own retirement savings to 15% of your income.

That ordering feels backwards to a lot of parents, and it can carry a quiet guilt. My parents saved for me. My mother is standing here with a check. And I’m going to put my own retirement first? But the logic is exactly the airline instruction to secure your own mask before helping the person beside you. A parent who reaches retirement with nothing becomes, however lovingly, a financial weight on the very child they were trying to help. The most generous thing you can do for your kid’s future is to not become a bill they have to pay. You can borrow for college; your child can borrow for college. Nobody can borrow for your retirement.

Two of the moves that protect a child aren’t accounts at all — a term life policy and a named guardian, both covered in the new-baby checklist and the estate-planning guide. Those come before any 529. If your own house is in order, though, read on — now the money can do its generational work.

Four jobs, four accounts

The figure lays out how the four differ. Read as jobs, they sort quickly.

The job is school → the 529. Most families’ money has the most common job, and for it the 529 plan is the default — the one account here with settled, generous rules. After-tax money goes in, grows tax-free, and comes out tax-free for tuition, books, room and board, and up to $20,000 a year of K–12 tuition. You stay the owner: you decide how it’s invested and, crucially, you can change the beneficiary to a sibling if plans change. And since 2024, leftover money isn’t trapped — it can roll into your child’s own Roth IRA, up to a lifetime cap. The 529 guide walks the whole thing, rollover included. If the job is college, this is where the check goes.

The job is “anything, whenever” → the UTMA/UGMA. The coworker’s account — a custodial brokerage account, named for the laws behind it, the Uniform Transfers (or Gifts) to Minors Acts — has the opposite personality. Its job is flexibility: it holds any investment, for any purpose that benefits the child, with no education strings. That flexibility is exactly the appeal. Its cost is the part most people opening one don’t see coming. A custodial account is an irrevocable gift. The money is legally your child’s the moment it goes in, and when they reach their state’s age of majority — 18 in many states, up to 21 in others — it becomes theirs outright, to do with entirely as they please. Picture the handoff: $200 a month for fifteen years, at a 7% real return, is roughly $63,000 in today’s dollars that lands in your eighteen-year-old’s lap, no conditions, the same year they’re choosing between a used car and a semester abroad. Sometimes that’s exactly what you intended. But it’s a control cliff, not a slope, and it arrives whether or not the kid is ready. And its gains are taxed every year, above a small amount at your rate rather than your child’s; that’s the “kiddie tax” the figure names. Fund a UTMA on purpose, not by default.

The job is a head start on their retirement → the custodial Roth (later). The parenting-group tip — a Roth IRA in the child’s name — is a genuinely great account pointed at a job most three-year-olds can’t do yet. A custodial Roth IRA is the best tax deal on this whole list: money grows and comes out entirely tax-free, with decades to compound. But it has one hard requirement — the child needs earned income, actual wages from actual work — and a toddler has none. This isn’t the account for the check today. It’s the one you come back to the summer your kid lands a first real job, when some of their babysitting or lifeguarding pay can go in. The teen Roth guide and the first-summer-job Moment are where that move lives. File it under “not yet,” not “no.”

The job is a seeded, long-term nest egg → the new Trump Account. The account Nadia’s mother keeps forwarding is genuinely new, created by the 2025 tax law, and worth knowing about: the government will seed $1,000 into one for an eligible U.S.-citizen child born from 2025 through 2028, and families can add up to $5,000 a year. But read the fine print before routing a check here. It’s built as a retirement account for the child — think traditional IRA, taxed as ordinary income on the way out — not a college fund, and the money is locked until the year the child turns 18. More to the point, the IRS is still finalizing the rules as of mid-2026. It’s something to track, not a settled account to bet on today, and it doesn’t replace a 529 or jump ahead of your own retirement. Know it exists; don’t let it hold up the decision in front of you.

The quiet tiebreaker: financial aid

If college is anywhere in the picture, one more factor can break a tie between two accounts: how each one counts against financial aid. The federal aid formula treats money the parent owns far more gently than money the child owns. A parent-owned 529 is assessed at most about 5.6% of its value a year; a child’s UTMA is assessed at 20%. On a $50,000 balance, that’s the difference between roughly $2,800 and $10,000 counted against aid — about $7,000 a year more that a family with a UTMA is expected to cover. Same savings, very different treatment, entirely because of whose name is on the account.

There’s a wrinkle worth knowing if grandparents want to help: a grandparent can own a 529 too, and after a recent simplification of the FAFSA (the federal student-aid form), a grandparent-owned 529 no longer counts against federal aid the way it once did — often making it the most aid-friendly place of all. If Nadia’s mother wants to keep giving each birthday, opening her own 529 for her granddaughter is worth a look.

What to do this week

You don’t have to solve your child’s whole financial future this week. You have to move one check somewhere better than the kitchen table. So match the move to where your child is right now:

• A baby or young child, and the job is school: open a 529. It’s the settled, flexible, aid-friendly default, and the Roth rollover means a modest over-shoot isn’t trapped.
• You want pure flexibility and understand the age-18 handoff: a UTMA/UGMA does that — just fund it on purpose, knowing the control cliff is coming.
• A teenager with a summer job: open a custodial Roth and move some of their earnings in. It’s the best tax deal they’ll ever get, available now only because they’re finally earning.
• A child born 2025–2028: learn the Trump Account rules and claim the $1,000 seed once the process is clear — without letting it displace the 529 or your own retirement.

And if none of those fit yet, because your own footing isn’t set — that’s your move this week, and it’s the right one.

Back to Nadia

Nadia picks up the check and, before choosing an account, answers the two questions. What is this for? College, mostly — that’s what her mother meant by “the baby’s future.” When will her daughter touch it? Not for fifteen years, and then for tuition. Two answers, and the four-way tie collapses: the money’s job is school, so its home is a 529. The custodial account’s flexibility isn’t worth handing a college fund to an eighteen-year-old; the Roth is a conversation for a summer a decade off; the Trump Account is a thing to watch, not the place for this check.

She opens the 529 that afternoon. Her mother, it turns out, wants to keep adding a little each birthday — so Nadia sends her the note about opening her own grandparent 529, the most aid-friendly option of all. The paralysis was never a money problem. It was a menu problem, and the menu got a lot shorter the moment she asked what the money was for. That’s the whole move: name the job, keep your own mask on first, and let each dollar do the one thing you meant it to — for the next person in your family who’ll need it.