A custodial account is a financial account an adult opens and manages for a minor, who is the legal owner of everything inside it. Custodial accounts operate under one of two state laws — the Uniform Gifts to Minors Act (UGMA) or the Uniform Transfers to Minors Act (UTMA) — and they let a family move money or property to a child without setting up a trust or a court-supervised guardianship. The adult runs the account; the child owns it; the tax bill follows the child.
UGMA and UTMA
Both statutes do the same basic job. UGMA came first, in the 1950s, and limits the account to financial assets: cash, stocks, bonds, mutual funds, and insurance policies. UTMA arrived in the 1980s and broadened the list to almost any property a person can own, including real estate, fine art, patents, and royalties. Nearly every state has adopted UTMA; Vermont and South Carolina still operate under UGMA only. If the gift is anything other than basic securities or cash, you need a UTMA account in a state that has adopted UTMA.
Donor, Custodian, and Beneficiary
Every custodial account has three roles. The donor contributes the money or property. The custodian manages the account. The beneficiary is the minor who legally owns the assets. One person can fill two roles, though combining donor and custodian creates an estate tax issue discussed below.
Once assets go in, the gift is irrevocable. The donor cannot pull the money back, redirect it, or change who the beneficiary is. The property belongs to the child from that moment, even though the child has no say in how it’s handled until reaching the age of majority.
The custodian makes investment decisions, handles paperwork, and approves withdrawals, but owns none of it personally. The law imposes a fiduciary duty: manage the assets with the care of a reasonably prudent person and act only in the child’s interest. Money can be spent for the child’s benefit — education, medical care, enrichment activities, travel — but not for what a parent is already legally obligated to provide, meaning basic food, clothing, and shelter. A custodian who misuses funds can be sued for breach of fiduciary duty and ordered to repay the account, surrender any profits from self-dealing, and in serious cases pay interest running back to when the money was taken.
There’s no receipt-submission process built into most custodial accounts, but a custodian should keep records of every withdrawal and what it paid for. If the beneficiary later challenges how the account was run, documentation is the custodian’s defense.
Gift Tax When You Contribute
Contributions are not tax-deductible. What the donor watches instead is the annual gift tax exclusion, which for 2026 is $19,000 per recipient.1Internal Revenue Service. Tax Inflation Adjustments for Tax Year 2026 A single donor can put up to $19,000 into one child’s account in 2026 with no gift tax reporting. A married couple can each give $19,000 to the same child, so $38,000 combined.
Going over the exclusion doesn’t automatically mean owing tax. Excess gifts count against the donor’s lifetime estate and gift tax exemption and require filing IRS Form 709. The underlying statute sets the base exclusion at $10,000 and adjusts it for inflation in $1,000 increments.2Office of the Law Revision Counsel. 26 USC 2503 – Taxable Gifts
How Earnings Are Taxed: The Kiddie Tax
Because the child owns the account, all investment income — dividends, interest, capital gains — is the child’s income. The IRS taxes it under a tiered system commonly called the kiddie tax, built to stop parents from parking high-yield investments in a child’s lower bracket.
For 2026, the tiers run like this:
- The first $1,350 of unearned income is tax-free.
- The next $1,350 is taxed at the child’s own rate, usually 10%.
- Anything above $2,700 is taxed at the parent’s marginal rate.3Internal Revenue Service. Topic No. 553, Tax on a Childs Investment and Other Unearned Income (Kiddie Tax)
The kiddie tax covers children under 18, 18-year-olds whose earned income is less than half their own support, and full-time students ages 19 through 23 who meet the same earned-income test. When a child’s unearned income exceeds $2,700, the custodian files Form 8615 with the child’s return.4Internal Revenue Service. Instructions for Form 8615 Parents can instead report the child’s income on their own return, but only if the child’s total interest, dividends, and capital gain distributions stay under $13,500 for the year.
A small account earning a few hundred dollars a year barely shows up on anyone’s return. A well-funded one throwing off significant dividends or gains can push unearned income past $2,700 quickly, and once the parent’s rate applies, the tax advantage largely disappears. This is the most common surprise for families who fund these accounts aggressively.
What Happens When the Child Reaches the Age of Majority
The custodian’s authority ends when the beneficiary hits the age of termination set by state law. In most states that’s 21 for standard irrevocable UTMA gifts and 18 for certain other transfers. Alaska, California, Nevada, Oregon, and Washington let a donor extend the age as far as 25 when the account is created.5Social Security Administration. POMS SI SEA01120.205 – The Legal Age of Majority for Uniform Transfer to Minors Act (UTMA) In UGMA-only states, the handoff typically happens at 18.
At that age, the custodian must transfer the assets into the beneficiary’s name. There’s no approval step, no conditions, no way to delay. The former minor gets full control and can spend the money on tuition, a car, a trip, or anything else. That is the trade-off families accept when they choose a custodial account over a trust: simple to open, no control at the end. A beneficiary who is refused the assets can sue to recover them.
Effect on College Financial Aid
Custodial accounts hurt aid eligibility more than most parents expect. On the FAFSA, they’re reported as student assets because the child owns them, and student assets are assessed at 20%. Every $10,000 in the account raises the expected family contribution by $2,000. The same money held in a parent’s name is assessed at roughly 5.6%. A $50,000 custodial account reduces aid by about $10,000; held by a parent, the reduction would be closer to $2,800.
One workaround is to liquidate the custodial account and move the proceeds into a custodial 529 plan, which stays in the child’s name as beneficiary but counts as a parent asset on the FAFSA. Selling the investments can trigger capital gains, and 529 funds must go to qualified education expenses or face a 10% federal penalty plus income tax on earnings. The child still becomes the legal owner of the 529 at the age of majority, so this fixes the aid math but not the control problem.
Custodial Account vs. 529 Plan
If the goal is college specifically, a 529 plan usually wins. A 529’s earnings grow tax-free and come out tax-free for qualified education expenses; custodial account earnings are taxable every year. A 529 owner keeps control indefinitely and can change the beneficiary to another family member; a custodial account transfers to the child at the age of majority and the beneficiary is permanently locked in. Non-education withdrawals from a 529 face a 10% penalty on earnings plus income tax; custodial funds, once transferred, can be spent on anything.
Custodial accounts fit better when the point is a general-purpose head start rather than tuition, or when the gift is property a 529 can’t hold, such as real estate, art, or intellectual property.
The Trap for Donors Who Also Serve as Custodian
If the person who funded the account is also the custodian and dies before the child reaches the age of majority, the entire balance may be pulled into the donor’s taxable estate. The IRS’s position is that a donor-custodian retained control over the assets — investment choices, distribution timing — so the gift wasn’t complete for estate tax purposes.
For most families, the federal estate tax exemption is high enough that this never matters. For high-net-worth donors, or in states with lower estate tax thresholds, it can create an unexpected bill. The fix is straightforward: name someone other than the donor as custodian. A spouse, grandparent, or trusted friend in that role breaks the retained-control argument and keeps the account outside the donor’s estate.