Custodial Account vs. 529 Plan: How to Choose the Right Account for Your Kids

If you’re deciding between a custodial account and a 529 plan for your kid, you actually may not have to choose just one. Many families can open and fund both for different purposes: a 529 plan for education and a custodial account for anything else. This guide walks through the key differences, when each account makes sense, and how the 2024 SECURE 2.0 Act affects the 529 plans. If you’re still early in your research, start with our pillar guide on investing for kids.

Custodial account vs. 529 plan: a side-by-side comparison

Here’s how the two account types stack up:

How custodial accounts work

A custodial account is an investment account an adult opens and manages on behalf of a kid. There are two types: UGMA (Uniform Gifts to Minors Act), which holds financial assets like stocks and bonds, and UTMA (Uniform Transfers to Minors Act), which holds those plus other assets like real estate.

Today, UTMA is the standard custodial account in every state except South Carolina.

The assets belong to the kid the moment they’re contributed. You, as the custodian, can choose investments and withdraw funds for anything that directly benefits the kid. Once the kid reaches the age of transfer in your state (typically 18 or 21), they take over full control. For a deeper dive, including a state-by-state age of transfer table and kiddie tax mechanics, see our guide on custodial accounts.

How 529 plans work

A 529 plan is a state-sponsored, tax-advantaged account primarily designed to save for education. The account owner (usually a parent or grandparent) manages the money, chooses investments, and can change the beneficiary to another eligible family member if circumstances change. Most 529s are college savings plans. They are market-invested accounts where earnings grow tax-free and qualified withdrawals are also tax-free. A smaller number are prepaid tuition plans, available in about nine states, which let you lock in today’s tuition rates at in-state public institutions.

Every state and the District of Columbia sponsors at least one 529 plan, and you’re not required to use your home state’s plan, though doing so often unlocks a state income tax deduction.

Individual 529 vs. custodial 529

Most readers asking about 529 plans want an individual 529, which is owned by an adult (usually a parent) with the kid as the beneficiary. This is the common case and what this guide refers to when discussing 529 plans.

A custodial 529 is a 529 funded from an existing UGMA or UTMA account. Because the source was a custodial account, the 529 keeps custodial rules. That means the kid is the legal owner and the beneficiary can’t be changed. At the age of transfer, the account transfers over to them. If you’re opening a new 529 for your kid, you likely consider the individual version.

How each account is taxed

Both accounts are taxed differently. Investment income from custodial accounts is subject to kiddie tax rules, and contributions are not tax-deductible. 529 plan earnings grow federally tax-free, and qualified withdrawals are also tax-free. Here’s how each works in practice.

Custodial account taxes

Because the kid owns the account, investment income is the kid’s income for tax purposes. The IRS uses kiddie tax rules: for 2026, the first $1,350 of a kid’s unearned income is tax-free, the next $1,350 is taxed at the kid’s rate, and anything above $2,700 is taxed at the parent’s marginal rate. Contributions are not deductible on federal or state taxes.

529 plan taxes

Earnings inside a 529 grow federally tax-free, and withdrawals used for qualified education expenses are also tax-free. Non-qualified withdrawals are subject to income tax on the earnings portion plus a 10% federal penalty.

Is a 529 plan tax deductible?

529 contributions are not deductible on federal taxes. Many states may offer a state income tax deduction or credit for contributions, usually when the contributor uses the state’s own plan. A handful of states allow the deduction for contributions to any state’s plan, and states without income tax don’t offer one. Deduction amounts vary widely. For your state’s specific rules, check your state’s 529 plan documentation or consult a qualified tax professional.

What can a 529 plan be used for?

529 funds can be used for a broader range of education expenses than most families realize:

• Tuition and fees at accredited colleges and universities
• Room and board within the school’s published cost of attendance
• Books, required supplies, and computers used primarily for school
   

The list has expanded significantly since 2017 to include:

• K-12 tuition (up to $10,000 per year per beneficiary)
• Registered apprenticeship program costs
• Student loan repayment (up to $10,000 lifetime per beneficiary)
   

Using 529 funds for anything not on the qualified list triggers income tax on the earnings portion plus a 10% federal penalty.

For the full qualified expenses breakdown, including a what-counts-what-doesn’t table and edge cases like studying abroad and graduate school, see our guide on what a 529 plan is or consult IRS Publication 970.

The 529-to-Roth IRA rollover: How the SECURE 2.0 Act changed everything

One of the biggest historical complaints about 529 plans was overfunding risk: if the kid didn’t go to college or used less than expected, you were stuck choosing between changing the beneficiary, waiting, or paying taxes and a 10% penalty on non-qualified withdrawals.

The SECURE 2.0 Act, effective January 2024, added a new option: you can now roll unused 529 funds into a Roth IRA in the beneficiary’s name, tax-free and penalty-free. It comes with five conditions:

• 15-year account age. The 529 must be open for at least 15 years. Changing the beneficiary may reset the clock (the IRS hasn’t issued final guidance).
• 5-year contribution hold. Contributions and earnings from the last 5 years aren’t eligible to roll over.
• Annual Roth limit applies. Each year’s rollover counts against the beneficiary’s annual Roth IRA contribution limit ($7,500 for 2026, $8,600 for age 50+).
• $35,000 lifetime cap per beneficiary. That’s the total amount that can be rolled over for any one person.
• Beneficiary earned income. The beneficiary must have earned income at least equal to the rollover amount that year. The Roth IRA must be in the beneficiary’s name.
   

One useful note for higher earners: the normal Roth IRA income limits (MAGI restrictions) don’t apply to 529 rollovers. Because the rules are specific and fact-dependent, talk with a qualified tax professional before initiating a rollover.

Contribution limits and 5-year gift averaging

Neither account has a federal contribution limit, but gift tax rules apply to both. For 2026, a single donor can give up to $19,000 per recipient ($38,000 for married couples) without filing a gift tax return. Most states cap total 529 contributions at around $235,000–$575,000+ per beneficiary, with the limit varying by state.

529 plans also have a unique “5-year gift averaging” option (sometimes called superfunding). A single donor can contribute up to $95,000 to one beneficiary’s 529 in a single year ($190,000 for married couples) and elect to treat it as spread over 5 years for gift tax purposes. This is a powerful tool for grandparents who want to jump-start a grandkid’s education fund while reducing their taxable estate. No additional gifts can be made to that beneficiary for the next five years without potentially triggering gift tax reporting.

What happens if your kid doesn’t use all the 529 funds?

Four options exist for unused 529 funds, each with different trade-offs:

• Change the beneficiary to another eligible family member: a sibling, cousin, parent, niece or nephew, or even yourself. The transfer is tax-free.
• Roll up to $35,000 into a Roth IRA for the beneficiary, following the SECURE 2.0 conditions above.
• Leave it invested and use it later. Most plans have no time limit on using the funds, so they can roll forward for graduate school, a future kid, or a grandkid.
• Withdraw non-qualified and pay income tax on the earnings portion plus the 10% federal penalty.
   

One important exception: if the beneficiary receives a scholarship, you can withdraw up to the scholarship amount from the 529 without the 10% penalty. You’ll still owe income tax on the earnings portion, but the penalty is waived. The same exception applies if the beneficiary attends a U.S. military academy or receives certain other education assistance.

How each account affects financial aid

With FAFSA, the two account types are treated very differently. A parent-owned 529 is assessed at up to 5.64% in the Student Aid Index calculation. A UGMA or UTMA custodial account is assessed at up to 20% as the student’s asset, a much bigger impact on need-based aid eligibility.

Under the simplified FAFSA that took effect for the 2024-25 academic year, distributions from grandparent-owned 529 plans are no longer reported as student income. This removed the old “financial aid trap” that used to discourage grandparents from contributing. Note that the CSS Profile, used by about 200 private colleges, may still consider these. For the full breakdown, see our deep-dive on custodial accounts.

Other education savings options to consider

• A Coverdell ESA offers similar tax-free growth potential for education with more investment flexibility, but has a $2,000 annual contribution limit and income caps on contributors, restrictive enough that most families don’t use them
• A Roth IRA can be used for qualified education expenses without the 10% penalty (though earnings are still taxed), but contribution limits are lower ($7,500 for 2026) and it’s generally a better fit for families already saving separately for retirement. For most families choosing between accounts specifically for a kid, the 529 vs. custodial account decision is the one that matters.
   

Using both accounts together

If you’re funding both, a common pattern is to prioritize 529 contributions up to expected education costs (to capture the tax-free growth potential and any state deduction), then use a custodial account for additional investing beyond that. The custodial account gives your kid flexibility for non-education goals: a first car, a security deposit on an apartment, a wedding, a down payment, or seed money for starting a business.

One rule of thumb worth remembering: prioritize your own retirement savings before funding either account for your kid. Your kid can borrow for college, but you can’t borrow for retirement.

Which account is right for your family?

Choose a 529 plan if you’re confident the money will go towards education, you want tax-free growth on qualified withdrawals, you live in a state with a meaningful 529 tax deduction, or you’re a grandparent looking to move money out of your estate efficiently.

Choose a custodial account if you want maximum flexibility on how the money can be used, you want broader investment options, or you’re investing for goals beyond education (a car, a first home, business seed money, general wealth-building).

Consider both if you can afford to fund both accounts and want to cover education and non-education goals separately. Many families do exactly this.

Opening an account for your kid

If a custodial account fits your family’s goals, we offer an Acorns Early Invest at Acorns, a UTMA custodial investment account for kids, available on the Acorns Gold plan. You can open one for each of your kids, set up Recurring Investments, and invest in expert-built ETF portfolios, all in the same app you use for your own investing. Family and friends can chip in too. Pairing it with the Acorns Early kids’ debit card gives your kid hands-on experience with money alongside the long-term investing.

Investing involves risk, including loss of principal. Past performance does not guarantee future results. No level of diversification or asset allocation can ensure profits or guarantee against losses.

Open a custodial account with Acorns Early Invest.

Frequently asked questions

Can I have both a 529 plan and a custodial account for my kid?

Yes. You can open both account types for the same kid, and many families do: a 529 for education expenses and a custodial account for general investing or non-education goals. Using both lets you take advantage of the 529’s tax-free growth potential on education spending while keeping flexibility for everything else.

What happens to a 529 plan if my kid gets a scholarship?

If your kid receives a scholarship, you can withdraw an amount equal to the scholarship from the 529 penalty-free. You’ll still owe income tax on the earnings portion of that withdrawal, but the 10% federal penalty is waived. Alternative options include changing the beneficiary to another family member, rolling up to $35,000 into the beneficiary’s Roth IRA under SECURE 2.0 rules, or leaving the funds invested for future education needs like graduate school.

Can I change the beneficiary on a 529 plan?

Yes. You can change the beneficiary of a 529 plan to another eligible family member, including siblings, cousins, nieces and nephews, parents, and in some cases yourself, without tax consequences. The new beneficiary must be a “member of the family” as defined by the IRS, which is a broad category. Custodial accounts, by contrast, cannot have the beneficiary changed: contributions are irrevocable and legally belong to the original kid.

Can grandparents open a 529 or custodial account for a grandkid?

Yes. Grandparents commonly open both 529s and custodial accounts for grandkids, and 529s offer a unique benefit — 5-year gift tax averaging — that lets grandparents contribute up to $95,000 ($190,000 for married couples) in one year without triggering gift tax reporting. Under the simplified FAFSA, distributions from grandparent-owned 529s no longer count as student income for federal financial aid, which removed the old concern about hurting aid eligibility.

What’s the difference between a custodial 529 and an individual 529?

An individual 529 is owned by an adult (usually a parent) with the kid as beneficiary. This is the common case. A custodial 529 is a 529 funded from an existing UGMA or UTMA account. The minor is the legal owner and the account keeps custodial account rules, including the requirement that control transfers to the kid at the age of transfer.

Do 529 plans affect financial aid?

Yes, but less than a custodial account does. A parent-owned 529 is assessed at up to 5.64% of value with FAFSA, while a UGMA or UTMA custodial account is assessed at up to 20% as the student’s asset. Grandparent-owned 529 plans no longer count against federal financial aid eligibility under the simplified FAFSA that took effect for the 2024-25 academic year, though the CSS Profile (used by some private colleges) may still consider them.