Custodial accounts vs. 529 plans: Comparing ways to save and invest for kids

Welcoming a child into the world – as a parent, grandparent or other loved one – is a magical thing. Soon enough, though, reality sets in and you realize that bundle of joy must be provided for. Fortunately, you have ample options when it comes to saving for a child’s future. Two of the most popular are 529 plans and custodial accounts (UTMA and UGMA accounts).

Both 529 plans and custodial accounts have distinct advantages. The former offer more tax perks, while the latter are typically more flexible with investment options and what the money can be used for. Both accounts have their downsides, too, however. 529 plans can trigger tax bills if the funds are used for anything other than qualified expenses. Custodial accounts have a bigger impact on federal financial aid eligibility, and the child must be given control of the funds when they legally become an adult. In this article, we’ll compare what each kind of account offers and how to choose between them or use both for a child.

How does a custodial account work?

There are two types of custodial accounts, though one is offered more than the other in the majority of states. Uniform Gifts to Minors Act (UGMA) and Uniform Transfers to Minors Act (UTMA) accounts let you gift money and assets to a child. The main differences between UGMA and UTMA are where the accounts are available to open and what types of assets you can transfer to a minor within the account (UTMA allows for more options).

The funds in the account are considered an irrevocable gift and are the legal property of the beneficiary, though an adult custodian is responsible for managing the funds in the child's best interest until they reach the age of majority – typically age 18 or 21, but it depends on the state. At that point, the beneficiary assumes control of the account.

This ownership structure has consequences for federal financial aid eligibility. Because the assets in a custodial account technically belong to the child, they count significantly more than parent assets in financial aid calculations.

You and other individuals can contribute as much as you'd like to the custodial account – though contributions are subject to gift tax rules. This means that anyone can contribute up to $19,000 per year (in 2026) with no gift tax consequences and no forms to file. If you plan to contribute more than that, consider consulting with a legal or tax professional.

In addition, if the child has enough unearned income, "kiddie tax" rules may apply, meaning part of the child's unearned income is taxed at the parents' higher marginal rate.

How does a 529 plan work?

A 529 plan offers a tax-advantaged way to save for education expenses. While saving for college is arguably the most popular option, you can also save for certain training programs and K–12 tuition or for post-graduate education. This article focuses exclusively on 529 college savings plans, which are the vast majority of overall 529 plans. Section 529 of the Internal Revenue Code also allows you to buy prepaid tuition credits at today’s prices for future college expenses; this article does not apply to prepaid tuition programs.

Funds saved in a 529 plan generally have less of an impact on federal financial aid eligibility because they are typically treated as a parental asset on the Free Application for Federal Student Aid (FAFSA). And if you’re a grandparent saving in a 529 plan for your grandchild, assets in a 529 account that you own don’t count at all when calculating the student’s financial aid on the FAFSA (although they might count for aid from some private schools).

While there are no federal annual contribution limits, contributions above the annual gift tax exclusion ($19,000 in 2026) may require filing a gift tax return, and each state sets its own lifetime maximum it allows to be accumulated for any beneficiary. For federal gift tax purposes, 529 plans allow you to use up to five years’ worth of annual gift exclusions up front – that means in 2026 you could potentially contribute up to $95,000 ($190,000 for married couples filing jointly) for a child and still not pay any gift tax, though you will have to file a gift tax return.

There are also federal income tax perks: Earnings grow tax-deferred, and withdrawals for qualified education expenses are tax-free. Some states also offer their own benefit – contributions to that state’s 529 plan can be deductible (up to limits) for state income tax purposes. Note, though, that some states don’t allow certain expenses to be “qualified” for tax-free withdrawals (such as tuition for K–12 schools) and the earnings portion of those withdrawals could be subject to state income tax and a portion of a deduction you got for contributions may be clawed back.

How custodial and 529 accounts are taxed

A 529 plan comes with distinct tax advantages. A 529 plan offers tax-deferred growth, and withdrawals for qualified education expenses are tax-free. However, ordinary income taxes and a 10% withdrawal tax may apply to the earnings portion of non-qualified withdrawals.

Higher education expenses (including vocational school) are considered qualified for the purposes of federal and state income taxes. However, not all states conform to the expanded federal definition of qualified expenses (e.g. K–12 and certain other expenses), so state tax treatment may differ.

Some states offer tax benefits, too, such as tax-deductible contributions (up to a certain amount). Contributors to Illinois’ 529 plan, for example, can deduct up to $10,000 ($20,000 for married filing jointly) per year.

UGMA and UTMA accounts are taxable bank or investment accounts, and they don’t offer the same tax advantages as 529s. This means dividends, interest and capital gains are taxed annually, though there is a small exclusion every year. In 2026, the first $1,350 of the child’s unearned income is tax-free. The next $1,350 is taxed at the child’s tax rate. Anything above $2,700 is taxed at the parents’ tax rate (the “kiddie tax”).

It’s also worth noting that contributions to custodial accounts aren't tax-deductible and gifts are irrevocable. In addition, if you contribute more than $19,000 (in 2026), you’ll need to fill out a form reporting the gift to the IRS. (You likely won't pay a gift tax, though; that applies only to donors who give millions of dollars over their lifetime.)

At some point, you may find yourself wondering if you can move funds from a custodial account into a 529 plan. Think through this carefully, as doing so can come with tax implications. Contributions to 529 plans can only be made with cash, so any investments in the custodial account would have to be sold and any capital gain would be recognized on the sale and treated as unearned income for the child. As noted above, if that amount is above $2,700, it will be taxed at the parents’ tax rate. And the custodial rules still apply – the child will become the owner of the 529 account at the age of majority. Additionally, in exchange for the tax advantages of a 529 plan, you may be giving up significant investment flexibility, since most 529 plans only allow you to invest in a few mutual funds, exchange-traded funds (ETFs) and age-based or risk-based portfolios.

Control and flexibility: Who can use the money, and for what?

You can use 529 plans for qualified education expenses. For higher education or vocational school, those might include tuition, fees, room and board, books and computers. K–12 expenses might include tuition, books, tutoring and test fees. Paying more than $20,000 (in 2026) of K-12 expenses is not a “qualified” expense and the earnings portion of the amount over $20,000 would be subject to ordinary income tax.

With a 529, the account owner retains control; usually it is possible to change the beneficiary (if, for example, one of your children doesn’t attend college or gets a scholarship), but plan rules vary.

You can use an UGMA or UTMA for essentially anything that benefits the child since these accounts are not limited to education expenses. At the age of majority – typically 18 or 21, though it can extend up to 25 in some states depending on state law – the beneficiary gains full legal control of the account. You cannot change the beneficiary of a custodial account.

In sum, a 529 may be worth considering if you're looking for an account that offers you more control and a tax-advantaged way to save for education expenses. A custodial account may be worth considering if you want more flexibility in how the funds can be invested and spent and are comfortable with your child assuming control once they reach the age of majority.

Impact on financial aid

When it comes to how most colleges calculate need-based financial aid, there are significant differences between 529 plans and custodial accounts.

In general, a student is expected to contribute up to 20% of assets they own versus 5.64% for assets owned by their parents.

The assets held in UGMA/UTMA accounts are considered the child’s property, whereas 529s owned by the parents are parental assets, so a custodial account (a student asset) is likely to reduce need-based aid more than a parent-owned 529 plan. And 529s owned by grandparents don’t count on the FAFSA at all (although they may count if your child’s school uses the CSS Profile, and withdrawals from a grandparent-owned 529 may count as the student’s income for CSS schools).

How to choose – and when using both may make sense

Consider a 529 if education is your primary goal, if you want tax advantages for qualified education expenses or if you want to maintain control over the account for a longer time. Consider a custodial account if you want more investment options, you want the funds to be able to cover expenses beyond education and if you’re comfortable with your child taking control once they reach the age of majority. You could also use both types if you want a dedicated education fund plus funds for essentially anything that benefits the child.

Whatever you choose, here are three things to consider: First, automating your contributions means you can invest for your child’s education consistently – it's easy, convenient and one less thing to think about. Second, keeping your investments simple and diversified helps manage risk, particularly for custodial accounts, which may require choosing and managing your own investments. And finally, if relatives want to contribute, it can be helpful to coordinate who is contributing to which account.

The bottom line

If you’re preparing to save for a child’s future, two popular options are 529 plans and custodial accounts. They differ considerably based on what investment options are available, what the money can be used for, how they’re taxed, how they impact financial aid, how much can be contributed and more.

When considering which account type is right for you and your family, evaluate your primary goal for the funds along with how such a vehicle might fit into your larger investing plan. You may also want to speak to a financial professional to go over specifics unique to your situation.

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