529 Plan vs. Custodial Brokerage Account: Which Is Better for a Child?

If the money is for school, a 529 plan usually wins. It grows tax-free for education, you stay in control, and it hurts financial aid less. A custodial account makes more sense when you want to give a child money they can use for anything, and you're fine with them taking control as a young adult.

1. What is a 529 plan?

A 529 plan is an investment account made for school. It's named after the section of the tax law that created it.

You put money in, invest it, and let it grow. When you take it out to pay for school, you don't pay federal tax on the growth. That's the big perk. You don't get a federal tax break when you put money in, but many states give one. New York's is covered in section 6.

Two roles matter. The account owner is the adult in charge, usually a parent or grandparent. The beneficiary is the student the money is for.

Dana puts $100 a month into a 529 for her son, Leo. Over 15 years she deposits $18,000. Say it grows to $26,000. When Leo starts college, Dana can use all $26,000 for tuition and owe no federal tax on the $8,000 of growth.

2. What is a custodial account?

A custodial account holds money or investments that legally belong to a child. An adult, called the custodian, runs it until the child is old enough to take over. A custodial brokerage account holds investments like stocks, funds and ETFs.

These accounts are set up under state laws called the Uniform Gifts to Minors Act (UGMA) or the Uniform Transfers to Minors Act (UTMA). Most new accounts are UTMA accounts, which can hold more kinds of property.

Once money goes into a custodial account, it's the child's. You can't take it back, even if plans change. The custodian must spend it only for the child's benefit, not for the family's general bills.

3. Ownership and control: the major difference

With a 529, you stay in charge. You pick the investments and decide when to take money out. You can even switch the beneficiary to another family member, like a sibling or cousin, with no tax.

With a custodial account, the money is locked to that one child. You manage it for now, but the child gets full control at the termination age set by state law. After that, the child can spend it on anything, and you can't stop them.

In New York, a UTMA account usually ends at 21. The person setting it up can choose 18 instead when the account is opened.

Ty's mom opens a UTMA account for him in Albany. At 21, the $30,000 is legally his. If he wants to spend it on a car instead of college, she can't stop him. With a 529, she'd still decide.

So start with one question: Are you saving for school, or giving your child money they'll control someday?

4. Side by side

Feature	529 plan	Custodial (UTMA/UGMA) account
Who owns it	The adult account owner	The child
Who controls it	The owner, for as long as the account exists	The custodian until 18 or 21, then the child
What it can pay for	School costs (see section 7)	Anything that benefits the child
Federal tax on growth	None when used for school	Taxed each year; kiddie tax can apply
New York tax deduction	Up to $5,000 a year ($10,000 married filing jointly) on NY's own plan	None
Can you change who it's for?	Yes, to another family member	No
FAFSA treatment	Parent asset (counts less)	Student asset (counts more)
If the child skips college	Change beneficiary, use for other training, roll some into a Roth IRA, or withdraw with tax and penalty	Child gets it at the termination age, no strings

5. How each account is taxed

529 taxes

Growth comes out tax-free when it pays for qualified education expenses, the school costs the IRS allows. Money taken out for anything else is a nonqualified withdrawal. Your own deposits come back tax-free, but the growth part is taxed as income, plus a 10% penalty.

The 10% penalty is waived if the student gets a tax-free scholarship (up to the scholarship amount), attends a U.S. military academy, becomes disabled, or dies. Income tax on the growth still applies in those cases.

Custodial account taxes

A custodial account isn't tax-free just because it's for a kid. Dividends, interest and gains from selling are taxed every year, on the child's tax return. This is the child's unearned income, meaning money from investments rather than a job.

The kiddie tax stops families from shifting large amounts of investment income to a child's lower tax rate. For 2026, it works like this:

Child's unearned income (2026)	How it's taxed
First $1,350	Tax-free
Next $1,350	At the child's rate, often 10%
Above $2,700	At the parents' rate

The kiddie tax applies to children under 18. It also applies to 18-year-olds, and full-time students aged 19 to 23, whose earned income is no more than half their support.

Noah, age 12, has $40,000 in a custodial account. This year it pays $1,800 in dividends. The first $1,350 is tax-free. The next $450 is taxed at Noah's 10% rate, so $45. Nothing reaches the $2,700 line, so his parents' rate doesn't apply. If the account grew to pay $4,000 a year, the $1,300 above $2,700 would be taxed at his parents' rate.

What the difference adds up to

Say a family saves $150 a month for 15 years. That's $27,000 in deposits. Imagine either account grows to $40,000, so $13,000 is growth. In the 529, that $13,000 can come out with no federal tax if it pays for school. In the custodial account, some of it was taxed along the way, and selling at the end can bring more tax.

You can try your own numbers with the investment growth calculator. It shows growth before taxes and fees.

6. If you live in New York

Two New York rules matter a lot here.

The deduction. If you pay New York income tax and put money in your own account in New York's 529 plan, you can deduct up to $5,000 a year ($10,000 if married filing jointly) on your state return. A custodial account gets nothing like this. See the full New York 529 guide.

K–12 withdrawals. New York treats a 529 withdrawal for K–12 tuition and related expenses as nonqualified for state tax. That means NY recaptures your deduction: you add the withdrawal back to your NY income, minus any contributions you never deducted. New York hasn't said clearly how it treats the newer K–12 costs in section 7, so plan for an add-back there too. Job-credential costs, on the other hand, count as qualified in New York for withdrawals made since July 4, 2025.

The Garcias in Troy use $8,000 from their NY 529 for private-school tuition. Federally, that's fine, but New York treats it as nonqualified. Since they've deducted more than $8,000 over the years, they add the full $8,000 back to their NY income.

7. What can a 529 pay for?

Under federal rules, a 529 can pay for:

College and grad school: tuition, fees, books, supplies, a computer and internet. Room and board counts for students enrolled at least half-time.
K–12 school: tuition up to $20,000 per student per year starting in 2026 (it was $10,000). Since July 2025, K–12 also covers curriculum and online materials, outside tutoring, test fees (like AP, SAT and ACT), dual-enrollment fees, and educational therapy for students with disabilities.
Trade and career training: registered apprenticeships, plus costs for job credentials, like a commercial driver's license or a trade license exam.
Student loans: up to $10,000 lifetime per borrower, for the beneficiary or each of their siblings.

One catch: you can't use the same dollars for a 529 withdrawal and for a federal education tax credit, like the American Opportunity Tax Credit. Plan which bills each one covers.

8. What if the child doesn't go to college?

A 529 gives you several choices:

Change the beneficiary to another family member, like a sibling, cousin, parent or even yourself. No tax is due.
Use it for other training, like trade school or an apprenticeship.
Roll some into a Roth IRA for the beneficiary.
Take the money out. You'll owe income tax and the 10% penalty on the growth only.

The Roth IRA rollover has strict rules:

The 529 must have been open at least 15 years.
Money put in during the last 5 years, plus its growth, can't be moved.
Each year's rollover is capped at that year's Roth IRA limit, minus any other IRA contributions the beneficiary made.
The beneficiary needs earned income at least equal to the rollover.
The lifetime cap is $35,000.
The usual Roth income limits don't apply.

Ella's grandparents opened a 529 for her in 2010. In 2026 she's 22, working, and skipped college. $8,000 is left, all put in before 2021. She can roll up to that year's Roth IRA limit into her own Roth each year, if her pay is at least that much. She can keep going until the 529 is empty or she hits $35,000 total.

A custodial account has no rules about school. The child simply gets the money at the termination age.

9. Financial aid

The FAFSA is the free federal form colleges use to decide need-based aid, meaning grants and loans based on what a family can afford. It counts the two accounts very differently:

A parent-owned 529 counts as a parent asset. At most about 5.64% of it is expected to go toward college each year.
A custodial account counts as the student's asset. About 20% of it is expected to go toward college each year.

Sam has $20,000 saved. In a parent-owned 529, it could cut his aid by up to about $1,128. In a custodial account, it could cut his aid by about $4,000.

Since the 2024–25 FAFSA, a 529 owned by a grandparent isn't reported at all. Some private colleges use a different form, the CSS Profile, which can count these accounts differently.

10. Other options worth knowing

Moving custodial money into a 529. Many 529 plans accept a "custodial 529" funded from a UTMA account. The investments must be sold first, which can create a taxable gain. The money still belongs to the child, and the child takes control at the termination age.

A Roth IRA for a child with a job. If your teen earns money from work, they can put up to the amount they earned (capped at the yearly IRA limit) in a Roth IRA. It can be a strong, flexible start.

Using both. Many families put school money in a 529 and keep a smaller custodial account for a general gift.

Common mistakes

Opening a custodial account for college without knowing the child gets it at 18 or 21. Your plans don't bind them.
Using a NY 529 for K–12 tuition without planning for the NY add-back.
Counting the same tuition for a 529 withdrawal and a tax credit. That makes part of the withdrawal taxable.
Investing aggressively right before college. Many 529s offer age-based portfolios, which get safer as the child nears school.
Forgetting the custodial account's yearly taxes. Dividends above $1,350 can mean filing a return for your child.
Putting large sums in a custodial account when aid matters. It can cut aid more than three times as much as a parent 529.

Frequently asked questions

Can I switch a custodial account back into my name?

No. The money is a completed gift to the child. You can move it into a custodial 529, but it still belongs to them.

Can grandparents contribute?

Yes. In 2026 anyone can give up to $19,000 per person ($38,000 for a married couple) with no gift-tax paperwork. A 529 also allows five years' worth at once: $95,000 ($190,000 for couples). In New York, only the account owner can take the state deduction, so a grandparent who wants it needs their own NY 529 account.

Is a 529 only for college?

No. It can also pay for K–12 tuition (up to $20,000 a year federally), apprenticeships, job credentials, and up to $10,000 of student loans. In New York, K–12 withdrawals trigger the state add-back.

Can either account lose money?

Yes. Both hold investments that can go down. Neither guarantees a return.

The bottom line

A 529 is built for school: you keep control, growth is tax-free for education, and aid takes a smaller hit. A custodial account is a gift the child will own and control, for any purpose. Decide what the money is for before you put in the first dollar. Want help balancing college savings with your other goals? Try the Financial Clarity Quiz.

Official sources

Convivial Wealth education guide · General education for U.S. readers, not personalized tax, legal or investment advice. Figures are for 2026 and are reviewed each year.

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