Custodial Accounts (UGMA/UTMA): Investing for Minors
Direct answer: A custodial account (UGMA or UTMA) is a taxable brokerage account that an adult opens and manages on behalf of a minor, with the minor as the irrevocable beneficiary. Once assets are transferred into a custodial account, they permanently belong to the child and cannot be taken back. At the age of majority (18 in most states, 21 in some), the child gains full control. UGMA accounts hold only financial securities (stocks, bonds, mutual funds). UTMA accounts can also hold real property, artwork, and other assets. The kiddie tax applies unearned income above a threshold to the child's account at the parent's tax rate until age 19 (or 24 for full-time students).
UGMA vs UTMA: What's the Difference?
Both UGMA and UTMA accounts are custodial accounts created under state uniform acts, but they differ in the types of assets they can hold.
UGMA (Uniform Gifts to Minors Act): UGMA accounts are limited to financial assets. The custodian can hold stocks, bonds, mutual funds, ETFs, cash, and other financial securities in the account, but cannot hold physical property or non-financial assets.
UTMA (Uniform Transfers to Minors Act): UTMA accounts have a broader scope, permitting the transfer of nearly any type of property to the minor, including real estate, patents, royalties, and other non-financial assets in addition to the financial securities that UGMA accounts can hold. UTMA was enacted after UGMA and has been adopted by all states except South Carolina, which still uses only the UGMA framework.
Both account types are taxable accounts with no special federal tax advantages beyond the child's potentially lower income tax rate on the first portion of unearned income. They do not receive the tax-deferred or tax-free treatment that 529 plans and IRAs offer. Unlike a 529 plan, a custodial account has no restriction on how the funds are used once the minor reaches the age of majority.
The Irrevocability Rule: The Key Failure Mode
The single most important characteristic of a custodial account is that all transfers into it are irrevocable. The moment you transfer an asset into a UGMA or UTMA account, that asset legally belongs to the minor. There is no mechanism to take it back, regardless of circumstances.
As custodian, you manage the account in the minor's interest until they reach the age of majority. You can make investment decisions, reinvest dividends, and withdraw funds, but only for the benefit of the minor (school expenses, healthcare, and similar needs). You cannot withdraw assets for your own use.
When the child reaches the age of majority (typically 18 in most states, with some UTMA states allowing custodians to elect a later transfer age of 21 or 25), they gain full, unrestricted control. The now-adult account holder can use the funds for any purpose: education, a car, travel, or anything else. There is no requirement that the money be used for any particular purpose.
The planning risk: If you transfer $50,000 into a UGMA account for a child, and your financial circumstances change significantly (job loss, medical emergency, divorce), you cannot access those funds. They belong to the child. Similarly, if the child reaches adulthood and makes choices with the money that you would not have approved, you have no recourse. The irrevocable gift is complete from the moment of transfer.
The Kiddie Tax
Investment income earned inside a custodial account is subject to the "kiddie tax" rules, which were designed to prevent high-income parents from shifting investment income to a child's lower tax rate.
How the kiddie tax works (approximate 2026 thresholds):
- The first portion of unearned income (approximately $1,350 in 2026) is sheltered by the child's standard deduction and is tax-free.
- The next portion (approximately another $1,350) is taxed at the child's own income tax rate, which is typically low for a minor with little or no earned income.
- Unearned income above approximately $2,700 is taxed at the parent's marginal tax rate, not the child's rate. This is the kiddie tax.
These thresholds are subject to annual inflation adjustments, so verify current figures with IRS Publication 929 or a tax professional each year.
The kiddie tax applies until the child turns 19 (or 24 if the child is a full-time student who is dependent on the parent for support). After that age, the child's investment income is taxed at their own rate regardless of parental income.
For a young child in a high-income household, the kiddie tax substantially limits the tax benefit of shifting investments to a custodial account, since most of the investment income above a small threshold will be taxed at the parent's rate anyway.
Financial Aid Impact
Assets held in a custodial account are counted as the student's own assets on the Free Application for Federal Student Aid (FAFSA). This has significant implications for families expecting to qualify for need-based financial aid.
Student assets assessed at 20%: Under the FAFSA formula, a student's assets reduce financial aid eligibility by up to 20% of the asset value each year. A custodial account balance of $10,000 could reduce financial aid eligibility by $2,000 in the application year.
Parent assets assessed at 5.64%: Assets held in a parent's name (including a parent-owned 529 plan) are assessed at a maximum rate of 5.64%. The same $10,000 held as a parent asset would reduce financial aid eligibility by only $564.
The difference is dramatic: a family with $50,000 in a custodial account faces a potential $10,000 reduction in annual aid eligibility, compared to $2,820 if that same $50,000 were in a parent-owned 529 plan. Families who expect to apply for need-based aid should weigh this impact carefully before funding a custodial account heavily.
Note that a 529 plan owned by a grandparent or other non-parent was previously treated as student income on the FAFSA when distributions were taken, but FAFSA simplification changes have improved the treatment of grandparent-owned 529 plans in recent years. Check current FAFSA rules for the latest treatment.
Age of Majority by State
The age at which a custodial account transfers to the minor's full control varies by state and account type. Most states set the age of majority for custodial accounts at 18, but there are important exceptions.
- 18 in most states: The most common transfer age for both UGMA and UTMA accounts.
- 21 in some states: Some state UTMA laws allow the custodian to specify a transfer age of 21 instead of 18 in the account documentation.
- Up to 25 in California and a few others: California's UTMA law allows the custodian to delay transfer of the account until age 25, giving the custodian additional time to manage the assets before the beneficiary gains full control.
- South Carolina: UGMA only, age 18, since South Carolina has not adopted UTMA.
If delaying the transfer is a priority (for example, if you want to give the beneficiary more time to mature before controlling a large sum), check your state's specific law to understand your options. Some states offer more flexibility on transfer age than others.
When a Custodial Account Makes Sense
Despite the limitations of the kiddie tax, irrevocability, and financial aid impact, custodial accounts are genuinely useful in certain situations.
- Non-education purposes: If your goal is to give a child assets they can use for any purpose when they become an adult (not restricted to education like a 529), a custodial account is the right vehicle.
- Non-financial assets (UTMA): If you want to transfer real property, intellectual property rights, or other non-financial assets to a minor, only a UTMA account can hold them. A 529 plan cannot.
- Supplemental to a 529: After maximizing 529 contributions, a custodial account provides additional gifting capacity without restrictions on the type of investments held.
- Teaching investing: A custodial account can be a practical teaching tool. The child can observe how their portfolio grows, discuss investment decisions with the custodian, and build financial literacy before gaining full control at majority.
- Simpler administration: Custodial accounts are straightforward brokerage accounts with no special documentation or annual forms. For modest gift amounts, the administrative simplicity compared to a trust can be attractive.
See also: 529 Plan Investing for the education-savings alternative, and Investment Accounts & Brokerage Accounts hub for the full spectrum of account types.
Frequently Asked Questions
What is the difference between a UGMA and a UTMA account?
Both UGMA and UTMA are custodial accounts that allow an adult to hold and manage assets on behalf of a minor, with the minor as the irrevocable beneficiary. The key difference is the asset types each can hold: a UGMA (Uniform Gifts to Minors Act) account is limited to financial securities such as stocks, bonds, mutual funds, and ETFs. A UTMA (Uniform Transfers to Minors Act) account can also hold real property, artwork, patents, royalties, and other non-financial assets. UTMA is available in all states except South Carolina, which still uses only UGMA. Both account types are taxable, with no special tax advantages beyond the child's potentially lower income tax rate on the first portion of unearned income.
Can I take money out of a custodial account?
No. Once assets are transferred into a UGMA or UTMA custodial account, they irrevocably belong to the minor. You cannot withdraw assets for your own use; custodian withdrawals must be for the benefit of the minor. At the age of majority (18 in most states, though some UTMA states allow custodians to extend this to age 21 or 25), the minor gains full control of the account and can use the assets for any purpose, whether education, travel, or anything else. This irrevocability is the primary failure mode of custodial accounts: if your financial circumstances change, you cannot reclaim assets you transferred.
How does a UGMA or UTMA account affect college financial aid?
Custodial accounts are treated as student assets on the FAFSA, which reduces financial aid eligibility at a 20% assessment rate (meaning $10,000 in a custodial account reduces expected aid by $2,000). In contrast, a 529 plan owned by a parent is assessed as a parent asset at a rate of 5.64%, so the same $10,000 reduces expected aid by only $564. This difference makes custodial accounts significantly more impactful on financial aid calculations than parent-owned 529 plans for families who expect to qualify for need-based aid.