Chapter Three · Custodial Mechanics
UTMA vs UGMA: the complete custodial-account guide
Updated 27 April 2026
UTMA (Uniform Transfers to Minors Act) and UGMA (Uniform Gifts to Minors Act) are the two legal frameworks that govern custodial accounts in the United States. Both let an adult open and manage a financial account for a child. The money is an irrevocable gift to the child. The custodian manages until the age of majority, at which point the child gains full unrestricted access.
The practical difference is what the account can hold. UGMA is limited to financial assets: cash, stocks, bonds, mutual funds, insurance, certificates of deposit. UTMA can hold all of those plus real property, patents, fine art. For most families the distinction is academic. Nearly all states have adopted UTMA, making it the more common framework.
The legal foundation
What "irrevocable gift" actually means
When you contribute to a UTMA or UGMA account, you are making a legal gift. This cannot be undone. You cannot withdraw the money for your own use. You cannot redirect it to a sibling. You cannot close the account and reclaim funds. The custodian has a fiduciary duty to manage the account solely for the named minor.
Permissible uses include education expenses beyond what the parent is legally obligated to provide, extracurricular activities, summer camps, a first car, a computer for school, or saving for the child's future. The custodian cannot use custodial funds for basic necessities (food, housing, clothing) that are part of the parent's existing legal support obligation. Misuse can result in legal liability.
This irrevocability is the most important distinction between custodial and joint. With a joint account, the parent can withdraw funds at any time for any reason. With a custodial account, the money belongs to the child the moment of deposit, and the parent is a steward until the child comes of age.
By state
Age of majority and what changes at 18
Most states set the age of majority at 18, several use 21, and some let the custodian elect a higher age (up to 21 or 25, occasionally 30) at account opening. Once that age is reached, the child gains full unrestricted control and the transfer cannot be reversed.
| States | Age of majority for UTMA |
|---|---|
| Alabama, Nebraska | 21 (UTMA), 18 (UGMA) |
| Mississippi | 21 |
| Arizona, Colorado, Nevada | 21 (UTMA) |
| California | 18 default; up to 25 if elected |
| Alaska | 18 default; up to 25 if elected |
| Wyoming | 18 default; up to 30 if elected |
| Most other states (DC, FL, GA, HI, IL, IN, KS, KY, MA, MD, MI, MN, NJ, NY, OH, PA, TX, VA, WA, WI, etc.) | 18 (default; some allow up to 21) |
In states that allow election to a higher age, the choice is typically made at account opening and cannot be changed. If your state offers it, age 21 gives the child three additional years of maturity before receiving a potentially large sum.
The tax angle
Kiddie tax thresholds for 2026
Custodial accounts are subject to the kiddie tax. For 2026: the first $1,350 of unearned income is tax-free (covered by the dependent's standard deduction), the next $1,350 is taxed at the child's rate (typically 10%), anything above $2,700 is taxed at the parent's marginal rate.
For a custodial savings account at 3.10% APY, the $1,350 tax-free threshold is not reached until the balance exceeds approximately $43,500. Custodial brokerage accounts can hit it sooner because of dividends and capital gains. The kiddie tax applies to children under 19, or under 24 if they are full-time students who do not provide more than half their own support.
Read the dedicated kiddie-tax guide for Form 8615 vs Form 8814 mechanics, balance-by-APY tables, and strategies to stay below the threshold.
The financial aid angle
A 20% asset, not a 5.64% one
Custodial accounts are reported as the student's asset on FAFSA. Student assets are assessed at 20% per year. A custodial with $25,000 reduces the financial aid package by approximately $5,000 per year, $20,000 over four years. Parent-owned accounts (joint, parent-owned 529) are assessed at only 5.64%. The same $25,000 reduces aid by $1,410 per year, $5,640 over four years. The difference is $14,360 in aid eligibility.
For families expecting to qualify for need-based aid this is the strongest single argument for using a 529 or joint account instead of, or alongside, a custodial. Read the full FAFSA impact guide.
Beyond a savings rate
What custodial brokerage accounts can hold
Unlike a joint savings account (cash only), custodial brokerage accounts can hold a diversified portfolio. Common options: total stock market index funds (VTSAX, VTI), target-date funds, individual stocks, bonds, certificates of deposit, money market funds. For a child with a 15 to 18 year time horizon, a diversified stock index fund has historically produced 8 to 10% annual returns, far exceeding the 3 to 5% APY of a savings account.
The trade-off is volatility. A savings balance never goes down. An investment portfolio can lose 20 to 40% in a single year during a market downturn. For money needed at a specific age, a glide path from stocks to bonds and cash over the final 3 to 5 years (similar to target-date retirement funds) is a common strategy.
When not to use a custodial account
Four reasons to choose something else
- Flexibility: if you might want to redirect the money to another child or purpose, do not use custodial. The gift is irrevocable.
- Financial aid: if your family expects to apply for need-based aid, the 20% FAFSA hit is a strong argument for a 529 or joint account instead.
- Trust at 18: if you are not comfortable with your child having unrestricted access at the age of majority, a 529 keeps you in control.
- College earmark: if the money is specifically for college, a 529 plan offers similar tax advantages plus continued parental control over distributions.
Postbag
Three things readers ask most
Which is more common, UTMA or UGMA?
UTMA. Nearly every state has adopted UTMA, which can hold both financial assets and physical property. UGMA still exists in some states and is limited to financial assets (cash, stocks, bonds). For most parents the distinction does not matter because the assets they would hold (cash, index funds) are eligible under either framework.
Can the custodian be changed?
Yes. The original custodian can resign, designate a successor, or in some cases be replaced by court order. The account ownership does not change (the child still owns the money), only the manager.
Can I use custodial money for the child's private school tuition?
Yes, if the tuition is not part of the parent's existing legal support obligation. K-12 private school tuition is typically considered an extra rather than a basic support requirement, though state law varies. Always document the use as benefiting the child specifically.