A custodial account for minors is a bank or brokerage account an adult manages on behalf of a child, with the child as the legal owner of every asset in it from the moment of deposit. These accounts are created under one of two state-adopted laws, the Uniform Gifts to Minors Act (UGMA) or the Uniform Transfers to Minors Act (UTMA), and they offer more flexibility than education-only savings plans because the money can eventually be spent on anything. That flexibility carries real trade-offs on taxes, financial aid, and the age at which the child gains full control.
UGMA and UTMA: Which One You’re Actually Opening
Every state has adopted a version of either UGMA or UTMA, both drafted by the Uniform Law Commission as model legislation.1FINRA. FINRA Regulatory Notice 20-07 The practical difference comes down to what you can put in and how long the custodian stays in charge.
UGMA accounts hold financial assets only: cash and securities like stocks, bonds, and mutual funds.2Social Security Administration. SI 01120.205 Uniform Transfers to Minors Act UTMA permits a much broader range of property, including real estate and intellectual property, which is why it has largely replaced UGMA in most states.
Termination age differs too. UGMA accounts typically transfer to the child at 18 or 21 depending on the state. UTMA often allows a later handoff, and many states let the donor specify an age up to 25 at the time the account is opened. The custodianship ends automatically once the child reaches the state’s set age, and the child receives unrestricted control of everything.2Social Security Administration. SI 01120.205 Uniform Transfers to Minors Act
Who Owns the Money
The child owns everything in the account. Not the custodian, not the donor. Property belongs to the minor from the moment it enters the account.3Cornell Law Institute. Uniform Gifts to Minors Act (UGMA) Every deposit is an irrevocable gift. Once the money goes in, the donor cannot pull it back, redirect it to a different child, or demand a refund, and the custodian cannot close the account and return the funds to whoever contributed them.
The custodian’s role is to manage the account with the care a reasonable person would use in handling someone else’s property. Every spending and investment decision must benefit the child. Using custodial funds for expenses a parent or guardian is already legally required to cover, such as basic food and housing, crosses the line, and so does dipping into the account for personal expenses. A custodian who misuses funds owes a debt to the child that can survive bankruptcy.
Naming a successor custodian when the account opens matters. If the original custodian becomes incapacitated or dies, the successor takes over management until the child reaches the termination age. Most brokerage applications include a field for this, and skipping it creates an avoidable problem later.
How Income in the Account Is Taxed
Because the child owns the account, the IRS taxes the income under the child’s Social Security number. But Congress did not want families sheltering unlimited investment income in children’s names at low rates, so the “kiddie tax” applies a tiered structure to unearned income from interest, dividends, and capital gains.
For the 2026 tax year, the tiers work like this:
- The first $1,350 is covered by the child’s standard deduction and not taxed.
- The next $1,351 to $2,700 is taxed at the child’s own rate, usually the lowest bracket.
- Anything over $2,700 is taxed at the parent’s marginal rate, which is often significantly higher.4Internal Revenue Service. Topic No. 553, Tax on a Childs Investment and Other Unearned Income (Kiddie Tax)
When a child’s unearned income exceeds $2,700, the custodian files Form 8615 with the child’s tax return to calculate the portion taxed at the parent’s rate.5Internal Revenue Service. Instructions for Form 8615, Tax for Certain Children Who Have Unearned Income Even below that threshold, a dependent child with more than $1,350 in unearned income is generally required to file a return.6Internal Revenue Service. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information Parents can instead report a child’s investment income on their own return using Form 8814, but only if the child’s total income is under $13,500 and consists entirely of interest and dividends.4Internal Revenue Service. Topic No. 553, Tax on a Childs Investment and Other Unearned Income (Kiddie Tax)
The kiddie tax reaches further than most people assume. It applies to children under 18, to 18-year-olds whose earned income does not exceed half their support, and to full-time students aged 19 through 23 who meet the same earned-income test. A 22-year-old college student with a custodial account throwing off dividends can still be taxed at the parent’s rate.
Gift Tax Rules for Contributions
There is no annual cap on how much can go into a custodial account itself, but the federal gift tax exclusion controls how much any one person can contribute without triggering gift tax reporting. For 2026, the exclusion is $19,000 per recipient.7Internal Revenue Service. Frequently Asked Questions on Gift Taxes A married couple who elects to split gifts can contribute up to $38,000 per child per year without filing a gift tax return.
Anyone can contribute, not just the parents. Grandparents, aunts, uncles, and family friends can all deposit money, and each donor gets their own $19,000 annual exclusion for that child. Contributions above the exclusion do not necessarily produce actual gift tax owed, but they do require filing Form 709 and count against the donor’s lifetime gift and estate tax exemption.
The Financial Aid Cost
This is where custodial accounts quietly cost families the most. Because the child legally owns the assets, the federal financial aid formula treats the balance as a student asset and assesses it at 20% when calculating the Student Aid Index.8Federal Student Aid. 2026-27 Student Aid Index (SAI) and Pell Grant Eligibility Guide The FAFSA assumes one-fifth of the account balance should go toward college costs each year. Parent-owned assets are assessed at a much lower rate, roughly 5.6% at most.3Cornell Law Institute. Uniform Gifts to Minors Act (UGMA)
A $50,000 custodial account could reduce financial aid eligibility by $10,000 per year, while the same $50,000 held in a parent’s name would reduce it by roughly $2,800. For families expecting to apply for need-based aid, this gap is worth weighing before funding a custodial account aggressively.
Effect on SSI and Medicaid
Families with a child who receives Supplemental Security Income need to be careful. SSI imposes a $2,000 resource limit for individuals, and countable resources include bank accounts, stocks, and mutual funds.9Social Security Administration. Understanding Supplemental Security Income (SSI) Resources Because the child legally owns everything in a custodial account, even a modest balance can push the child over that limit and end SSI eligibility. Medicaid can be affected for the same reason, since many states tie their Medicaid resource limits to SSI rules.
For a child on needs-based benefits, a properly structured special needs trust is usually a better fit than a custodial account, because it does not count as an available resource for benefit purposes.
The Estate Tax Trap for Donor-Custodians
If you fund a custodial account and name yourself as custodian, you keep the power to decide how the money is invested and spent. If you die before the account terminates, the IRS can pull the entire balance back into your taxable estate on the theory that you held a power to alter or direct enjoyment of the transferred property.10Office of the Law Revision Counsel. 26 U.S. Code 2038 – Revocable Transfers
The fix is straightforward. If you are funding the account, name someone else as custodian. A spouse, grandparent, or other trusted adult works. The same logic applies to the successor custodian slot: if the successor is also a donor, the estate inclusion risk simply transfers to them.
Opening and Funding the Account
Most brokerages and banks let you open a custodial account online in about 15 minutes. You’ll need the child’s full legal name, date of birth, and Social Security number for tax reporting. The custodian provides their own Social Security number, a government-issued photo ID, and a residential address. The application will ask you to designate a successor custodian.
Once the account is approved, you can fund it by linking an external bank account for electronic transfers, sending a wire, or mailing a check. Minimum initial deposits vary by institution, from nothing to a couple thousand dollars. After the deposit clears, the custodian can choose investments from the firm’s regular menu: index funds, individual stocks, bonds, and similar options.
Every contribution, whoever makes it, is an irrevocable gift to the child. Grandparents and other relatives can contribute directly, each using their own $19,000 annual gift tax exclusion for 2026.7Internal Revenue Service. Frequently Asked Questions on Gift Taxes Unlike a 529 education savings plan or an IRA, there is no overall annual contribution limit on the account itself.
What Happens When the Child Reaches the Termination Age
Transfer of control is automatic. Once the child hits the termination age set by state law, the custodianship ends and the money belongs to the child without restriction.2Social Security Administration. SI 01120.205 Uniform Transfers to Minors Act No approval process. No review of maturity. No way for the custodian to extend the arrangement. An 18-year-old or 21-year-old can withdraw every penny and spend it however they want.
This is the single biggest anxiety parents have about custodial accounts, and it is a legitimate one. You cannot claw the money back or convert the account into a trust at the last minute. If you are worried a young adult might spend through the funds, the better approach is to keep contributions modest or use a formal trust instead, where you can set conditions on distributions.