UTMA and UGMA Custodial Accounts: How They Work and What Parents Should Know

Many parents and grandparents want to set aside money for a child but do not want the cost or complexity of setting up a formal trust. The Uniform Gifts to Minors Act (UGMA) and its successor, the Uniform Transfers to Minors Act (UTMA), give them a simpler option. Nearly every US state has adopted one of these laws, which create a standardized way to hold property for a minor's benefit inside a custodial account at a bank or brokerage.

How the Account Is Structured

A custodial account has three parties: the donor who contributes assets, the custodian who manages the account, and the minor who ultimately owns the assets. The donor and custodian can be the same person, such as a parent who opens the account and also oversees it. The custodian has a fiduciary duty to manage the account for the minor's benefit, similar to a trustee, but with far less paperwork and no need for a formal trust document or attorney.

Contributions to a UTMA or UGMA account are irrevocable. Once the donor deposits cash or transfers securities into the account, that gift legally belongs to the minor, even though the custodian controls how it is invested and spent until the child reaches the applicable age. This distinguishes custodial accounts from a parent simply holding assets in their own name for a child's future use.

UGMA vs. UTMA: The Practical Difference

• UGMA accounts are generally limited to financial assets such as cash, stocks, bonds, and mutual funds.
• UTMA accounts, adopted later and now used in most states, can also hold real estate, intellectual property, and other non-financial assets.
• Some states still use the older UGMA framework or have specific variations, so the exact rules depend on state law.
• Both account types transfer full ownership to the beneficiary at the state-specified age of majority, commonly 18 or 21, and in some states as late as 25 depending on how the account was established.

Tax Treatment and the Kiddie Tax

Because the assets legally belong to the minor, investment income generated in a custodial account is generally taxed to the child, not the parent. However, the IRS applies what is commonly called the kiddie tax to a child's unearned income above certain thresholds, taxing it at the parent's marginal rate rather than the child's typically lower rate. The IRS publishes the current thresholds and rules each year, and Form 8615 is used to calculate the tax when it applies. Families should check the latest IRS guidance before assuming a custodial account will produce meaningful tax savings.

Financial Aid and College Planning Considerations

Custodial accounts are sometimes used informally as a college savings vehicle, but they carry a specific drawback for financial aid. Under the federal need-analysis formula used for the FAFSA, assets held in the student's own name, including UTMA/UGMA accounts, are assessed at a significantly higher rate than assets held in a parent's name. A 529 college savings plan owned by a parent, by contrast, is treated more favorably. Families weighing a custodial account against a 529 plan should consider this difference alongside their broader savings goals, since a custodial account offers more investment flexibility but less control and a potentially larger impact on aid eligibility.

Loss of Control at the Age of Majority

The most important feature to understand is what happens when the child reaches the age set by state law. At that point, the custodian's authority ends automatically, and the now-adult beneficiary gains full legal control of the account. The funds do not have to be used for education, a home, or any purpose the donor originally intended. This is a key difference from a trust, where a grantor can impose conditions on distributions. Anyone funding a custodial account should treat the contribution as a completed, unconditional gift to the child's future adult self.

Key Takeaways for Donors and Custodians

• Confirm your state's age of majority for custodial accounts before assuming the funds will be available for a specific purpose like college tuition.
• Remember that contributions are irrevocable gifts that count toward annual gift tax exclusion limits set by the IRS.
• Compare a custodial account against a 529 plan or a trust if your primary goal is funding education, given the differing financial aid and control implications.
• Keep records of contributions and account activity, since the custodian remains legally accountable for managing the assets prudently until termination.