A 529 plan can bring taxes and penalties if the money goes anywhere but education. A custodial brokerage account hands the child complete control the day they come of age, with no strings on how it gets spent.
Those two rules decide more about where a family puts money for a child than the fund lineup inside any of these accounts does.
The Four Account Types at a Glance
| Account | Who controls the money | What it can pay for | Contribution limits |
|---|---|---|---|
| Custodial brokerage (UGMA/UTMA) | Parent manages; child takes over at 18 or 21, depending on state | Anything, once the child owns it; before then, only for the child's benefit | None |
| 529 plan | Whoever opens the account | K-12 or post-secondary education; other uses can trigger taxes and penalties | Ranges from $235,000 to $575,000 |
| Custodial Roth IRA | Parent manages; ownership transfers at 18, or 21 in some states | Retirement, with some penalty-free exceptions | $7,000 a year in 2024 and 2025 |
| Teen brokerage | Teen gets more control than a custodial account allows | Anything | Not a set statutory cap |
529 Plans Trade Flexibility for Tax-Free Education Money
A 529 plan is built for one job. Earnings grow untaxed, and withdrawals used for qualified education expenses aren't taxed either.
Contributions generally aren't deductible on a federal return, though they may be on a state return depending on where you live. Contribution ceilings are high, from $235,000 to $575,000 depending on the plan.
Two details soften the "education only" restriction. The beneficiary can be changed to someone else, and starting in 2024, unused funds can be rolled into the beneficiary's Roth IRA. Money set aside for a child who skips college doesn't automatically become a penalty.
You aren't limited to your own state's plan, so it's worth comparing investment menus and fees across plans. Watch one catch, though: a state income tax break for contributions is usually tied to that state's own plan, and shopping elsewhere can mean giving up the deduction.
Investment choices inside a 529 are usually narrower than what a regular brokerage account offers.
Custodial Brokerage Accounts Have No Contribution Cap and No Spending Rules
A custodial account is the closest thing to a normal brokerage account opened on a child's behalf. It comes in two forms, a UGMA (Uniform Gifts to Minors Act) or a UTMA (Uniform Transfers to Minors Act), which differ slightly in the assets they can hold.
The child is the legal owner. An adult makes the investment decisions until the child comes of age, usually 18 or 21 depending on the state.
Anyone can fund it with after-tax dollars: parents, grandparents, a family friend.
There's no contribution limit and no requirement that the money go toward school. Withdrawals made while the child is still a minor have to be used for the child's benefit.
Once the child takes ownership, that restriction disappears along with the parent's control. A 21-year-old can put a college fund into a car, and there's no mechanism to undo it.
Some parents use a different route: a brokerage account in their own name, earmarked for the child. It gives up the child's more favorable tax treatment but keeps the money under the parent's control indefinitely.
Platforms differ most in the investment menu, the fees, and how easily relatives can chip in. Some limit you to a handful of prebuilt diversified baskets; others let you choose every holding.
Most large brokerages, including Fidelity and Charles Schwab, offer custodial accounts.
A Custodial Roth IRA Only Works If the Child Has Earned Income
The child needs earned income of their own before anything can go in. The annual limit is $7,000 in 2024 and 2025. There's no deduction going in, and no tax on qualified withdrawals coming out.
It's more flexible than its name suggests. Contributions can be pulled out at any time without penalty, since tax was already paid on that money.
Earnings can come out penalty-free for certain purposes, including higher education, buying a home, or having or adopting a child. Like other custodial accounts, ownership transfers at 18, or 21 in some states.
Custodial IRAs are less widely offered than custodial brokerage accounts, though Fidelity and Charles Schwab are among the brokerages that have them.
Teen Brokerage Accounts Give the Teenager More Say Before Adulthood
This is a newer category. A teen brokerage account carries much of what a custodial account offers while handing the teenager more direct say over the money before they turn 18. Availability is still limited across brokers; Fidelity is one place to open one.
Kiddie Tax Exemptions and Gift Tax Reporting
Custodial and teen brokerage accounts fall under the kiddie tax. As of 2024, the first $2,500 of a child's investment income is exempt from tax, and anything above that is taxed at the child's rate.
Earnings inside a 529 plan or a custodial Roth IRA aren't taxed at all.
Gift tax is the other piece. Money you put into an account the child owns can count as a gift. For 2025, the limit is $19,000 per gifter, per recipient, or $38,000 per child for a married couple giving together. Above that, a gift tax return is required.
Financial Aid Counts a Child's Assets Four Times Harder Than a Parent's
The FAFSA formula assumes parents will contribute up to 5.64% of their assets toward college, and that students will contribute 20% of theirs.
That gap matters. A 529 plan belongs to whoever opened it, so a parent-owned 529 is assessed as a parent asset.
A custodial account is the child's property and gets the heavier treatment. Retirement accounts, including a child's, are excluded until money is withdrawn.
Time in the Market Does More Than the Size of the Deposit
Two accounts funded with the same monthly amount can finish far apart, and the reason is usually how long each one ran.
More years mean more contributions going in, and they give compounding more to work with, since prior returns start earning returns of their own.
A long horizon also spreads market ups and downs out instead of packing them into a few years.The return gap is why many parents look past a savings account.
The Securities and Exchange Commission puts the stock market's average annual return at around 10%.
High-yield savings accounts were paying upwards of 5% as of November 2024, which is real money, but that rate follows interest rates and drops when they drop.
Market returns, of course, aren't fixed or guaranteed, and a short time horizon leaves less room to recover from a downturn.
Turning a $100,000 Target Into a Monthly Contribution
A goal is easier to fund when it's translated into a monthly figure. Say a parent wants $100,000 available for college in 18 years and assumes a 7% annual return.
Run those inputs through a compound interest calculator and the required monthly contribution comes out to roughly $250. Change the time frame or the assumed return and that number moves, which is the point of running the math before choosing an account.
Opening an Account: Paperwork, Transfers, and the Investment Step
Where the account is held decides the investment menu and the fees, and both vary widely, so that comparison happens before any forms get filled out. The mechanics after it are short.
- The application. Almost all of it happens online, and it asks for your details and the child's, plus bank routing and account numbers for funding.
- The transfers. Automatic contributions keep the balance growing without a monthly decision, and the amount can be changed later. Relatives who want to give need only the account details to contribute directly, though on an account with a contribution limit those gifts are worth tracking against it.
- The investment instruction. Cash that arrives in a brokerage account stays cash. It sits uninvested until something is actually purchased or a standing instruction does the purchasing.
What a Child Learns From Watching the Balance
A child who can watch a balance move picks up things a lecture won't convey: how automatic saving works, why leaving money alone matters, what a share of a company is. None of that requires the child to run the account. The statement does the explaining.
Where Each Account Fits
A 529 fits money earmarked for education, and it keeps the assets on the parent's side of the aid formula. A custodial brokerage account buys flexibility and unlimited contributions in exchange for handing over the keys at 18 or 21.
A custodial Roth IRA isn't available until a child has earned income, and it aims at a horizon measured in decades. So the account follows from what the money is for and who should control it once the child is grown, with financial aid narrowing the field where it applies.
Each of these accounts carries investment risk, and each one locks in a different answer to the control question long before the child is old enough to argue about it.
