Custodial accounts (UTMA / UGMA)

Children under 18 cannot enter binding contracts in U.S. law, which means they cannot directly open a bank account on their own behalf. The state legislatures addressed this in two waves: the Uniform Gifts to Minors Act (UGMA, originally promulgated 1956) and the broader Uniform Transfers to Minors Act (UTMA, 1986). Most states have adopted UTMA in some form, though a small number retain the older UGMA framework. The two statutes establish a custodial form of account in which an adult manages assets in the minor's name and, at the age of majority, the minor takes outright control.

This article describes what a custodial account is, the custodian's legal duties, the transfer at the age of majority, and a brief summary of tax treatment. Because the tax rules involve elections, thresholds, and the so-called "kiddie tax," any consumer using a custodial account for tax-planning purposes should consult a qualified tax professional; this article does not give tax advice.

The legal structure

A custodial account is held by a custodian "for the benefit of" a named minor. The assets in the account belong, legally and beneficially, to the minor; the custodian manages them under a fiduciary duty to act in the minor's interest. The custodian is typically the parent or another adult relative, but UTMA permits any adult to serve and a number of states permit a trust company or other professional fiduciary.

The custodian's powers are broad — they can deposit, withdraw, invest, and disburse the funds — but each transaction must be for the minor's benefit, not the custodian's. The custodian cannot use the funds to discharge their own legal obligations of support (so a parent-custodian cannot use the account to pay for groceries or basic clothing, items the parent is legally obligated to provide regardless of the account). Disbursements for the minor's benefit — education expenses, music lessons, summer camp, a first car — are permitted within the broad meaning of "benefit."

Once funds are contributed to the custodial account, the gift is irrevocable. The contributor cannot reclaim the funds, change the beneficiary, or revoke the gift. This is a defining feature: the custodial account is the minor's property from the moment of contribution.

Transfer at the age of majority

At the age of majority specified by state law — typically 18, 21, or in a few states up to 25 — the custodianship terminates and the minor (now an adult) takes outright control of the account. The custodian must transfer the assets, the records, and (where applicable) the account itself into the now-adult beneficiary's name. The transfer is automatic in legal effect; the operational mechanics (signing new signature cards, retitling investment positions) are handled by the institution.

This is the principal feature that makes custodial accounts unsuitable for some family-planning purposes. The contributor cannot prevent the beneficiary from receiving the funds at the age of majority, and cannot impose conditions (such as "if you go to college") on the transfer. Families who want more control over the timing or conditions of asset transfer typically use a trust rather than a custodial account; a trust permits the grantor to specify conditions, distribution timing, and a successor structure, at the cost of materially higher administrative complexity.

At a bank versus at a brokerage

A custodial account at a bank typically holds a deposit (a savings account, a CD, or sometimes a checking account) and is FDIC-insured up to the standard maximum of $250,000 in the minor's ownership category. A custodial account at a brokerage typically holds securities — stocks, mutual funds, ETFs — and is not FDIC-insured; SIPC coverage applies to the brokerage component, with different limits and structures. The two forms have the same UTMA/UGMA legal structure but very different asset characteristics.

For a small balance intended for short-horizon use, a bank custodial account is operationally simple and federally insured. For a larger balance intended for long-horizon growth (e.g., a college fund), the brokerage form gives access to a wider asset universe but at the cost of investment risk. The choice is independent of the UTMA/UGMA framework; the legal structure is the same in both cases.

Tax treatment, in summary

Because the funds in a custodial account belong to the minor, interest, dividends, and capital gains on the account are the minor's income for tax purposes. Two specific federal-tax rules apply.

First, the so-called kiddie tax: under current law (as of 2026, subject to confirmation against the IRS's most recent guidance), a child's unearned income above a defined threshold is taxed at the parents' marginal rate rather than at the child's. The threshold is adjusted for inflation annually; for 2025, unearned income above approximately $2,600 was subject to the kiddie-tax treatment, with the first portion taxed at the child's rate. Custodial accounts that generate substantial unearned income lose much of their tax advantage compared to assets held in the parent's own name.

Second, gift tax: contributions to a custodial account are completed gifts to the minor, subject to the federal gift-tax annual exclusion (for 2025, $19,000 per donor per donee, with verification recommended against current IRS figures). Contributions above the exclusion require a gift-tax return; whether actual gift tax is owed depends on the donor's lifetime unified credit, which interacts with the estate-tax framework.

These tax features are summarized here for orientation; the specific treatment for any contributor and minor depends on circumstances and on current law, both of which change. A qualified tax professional should be consulted before relying on any specific treatment.

Operational details

Opening a custodial account requires the same Customer Identification Program verification as any other account — for both the minor (typically by Social Security number and birth certificate or other documentary evidence) and the custodian. The bank or brokerage will require the custodian to acknowledge the UTMA/UGMA framework and the fiduciary duties it imposes. Statements are issued to the custodian on the minor's behalf; the minor cannot transact on the account directly until the age of majority.

If the custodian dies, becomes incapacitated, or resigns, the account agreement (or, failing that, state law) specifies a successor-custodian procedure. A well-organized custodial-account opening will name a successor custodian to avoid a court-appointed substitute later.

Comparison with §529 plans and trusts

Two principal alternatives to a custodial account for funding a child's future use are state-sponsored Section 529 education-savings plans and trusts.

A §529 plan is a state-sponsored, tax-advantaged investment plan for qualified education expenses. Contributions grow tax-free if used for education; non-qualified withdrawals are taxed and (subject to exceptions) penalized. The account owner — typically the parent — retains control regardless of the beneficiary's age, can change the beneficiary, and can withdraw funds (paying tax and penalty on earnings). The 529 framework is materially different from the UTMA/UGMA framework: the parent retains control, but the funds are restricted in their use.

A trust gives the grantor maximum flexibility in setting conditions, distribution timing, and successor arrangements. The cost is administrative: a trust requires drafting (typically by an attorney), funding, ongoing administration, separate tax filings in many cases, and often a professional trustee. Trusts make sense for substantial balances or specific family situations; for the smaller balances most parents use to teach a child about banking, the operational cost of a trust outweighs the flexibility benefit, and a custodial account or 529 is typically preferred.

Limits and uncertainty

The UTMA/UGMA framework is state law and varies in specifics across states. The federal-tax treatment (the kiddie tax and gift-tax exclusion) is set by the Internal Revenue Code and adjusted by the IRS annually for inflation; current thresholds should be verified against the most recent IRS publications. The custodial-account product itself has been stable for decades; the choice between UTMA, 529, and trust depends on the specific family's circumstances and goals, neither of which this article can address. A qualified tax or estate-planning professional is the right source for advice on individual situations.