If you serve as custodian on a UGMA or UTMA account, you are a fiduciary. The fiduciary duties of a UGMA or UTMA custodian require you to manage the account solely for the benefit of the minor who owns it, invest the assets prudently, keep them strictly separate from your own money, spend them only on things that go beyond your own legal obligation to support the child, meet the account’s tax obligations, and turn over full control when the child reaches the age set by your state’s statute. The assets belong to the child from the moment of the gift, and every choice you make has to serve that child. Getting this wrong can cost you personally, through court-ordered reimbursement, removal, legal fees, and in serious cases criminal charges.
The Gift Belongs to the Child
A transfer into a UGMA or UTMA account is an irrevocable gift. The donor permanently gives up ownership and control of the property.1Social Security Administration. POMS SI 01120.205 – Uniform Transfers to Minors Act You manage the account, but nobody can redirect the money to anyone other than the named minor. Not the donor, not you, not a court. A grandparent who funded the account cannot later shift it to a different grandchild. A parent who set it up cannot pull the money back because circumstances changed.
This is the frame for every other duty. When a custodian “borrows” from the account intending to pay it back, that is still a breach. The money already has an owner, and it is not you.
Duty of Loyalty
The duty of loyalty requires you to act exclusively for the minor’s benefit in every transaction. There are no exceptions for financial hardship, family emergencies, or your own view that the money would do more good somewhere else.
Self-dealing is the clearest violation. Borrowing from the account, using its assets as collateral for a personal loan, or buying property from the account at a favorable price all create conflicts of interest that can lead a court to remove you.
The subtler and far more common violation involves parents who serve as custodian and use the funds to cover expenses they are already legally required to provide. Courts consistently hold that spending custodial money on the child’s basic food, clothing, and shelter benefits the parent, because it reduces the parent’s own support obligation. This is true even when no formal support order exists. Only when a parent genuinely lacks sufficient income to meet the child’s needs can custodial funds properly supplement basic support.
What You Can and Cannot Spend the Money On
State UTMA statutes generally allow a custodian to spend custodial property for the minor’s use and benefit without a court order and without regard to anyone else’s ability to support the child. That language sounds broad, but it is not unrestricted. The statutes also say custodial expenditures are in addition to, not in substitution for, the legal obligation to support the child.
Permissible spending generally goes beyond basic support. Private school tuition, summer programs, music lessons, a computer for schoolwork, a car for a teenager, medical expenses insurance does not cover. These are enrichment-type expenses that provide something above what a parent already owes.
Prohibited spending covers anything that primarily benefits the custodian or substitutes for the custodian’s own financial responsibilities. Household groceries, the electric bill, rent, ordinary clothing. A custodian who blurs this line may have to reimburse the account personally.
A useful test: would you be paying for this even if the custodial account did not exist? If yes, the expense should not come from the account.
Prudent Investment Standard
You must manage the account’s investments with the care a prudent person would use when handling someone else’s property. That is a higher bar than managing your own money, because the owner is a child with no voice in the decisions and no ability to recover losses on their own. A custodian who has professional investment experience is held to a still higher standard and expected to apply that expertise.
Most states follow the principles of the Uniform Prudent Investor Act, which looks at the portfolio as a whole rather than at individual picks. The core requirements are diversification and a risk-return balance appropriate to the minor’s situation. Concentrating the entire account in a single stock, loading up on speculative penny stocks, or holding everything in cryptocurrency would fail this standard in most circumstances. A diversified mix of index funds and bonds usually will not.
Courts evaluate investment decisions based on what was reasonable at the time, not with hindsight. You will not be held liable simply because an investment lost money. The question is whether your process was sound: whether you considered risk, diversification, and the minor’s time horizon before acting. An uncompensated custodian who acts in good faith and maintains a diversified portfolio typically will not face liability for ordinary market losses. Losses from gross negligence or intentional misconduct are a different matter.
What the Account Can Hold: UGMA vs. UTMA
The type of property you can manage depends on which act governs. UGMA accounts are limited to financial assets: cash, stocks, mutual funds, ETFs, bonds, and insurance policies. UTMA accounts can hold all of those plus real estate, fine art, collectibles, patents, and royalties. If you are holding real estate or physical property in a UTMA account, the prudent-person standard still applies, which means maintaining the property, paying its taxes, and keeping it adequately insured.
Keep Custodial Assets Separate
Commingling custodial funds with your personal money is one of the fastest ways to breach your duties. The account must be titled in a format that identifies the custodian, the minor, and the governing act. Something like “Jane Smith as custodian for John Smith under the [State] Uniform Transfers to Minors Act.” That titling tells the financial institution, the IRS, and any court that the child is the legal owner.
Depositing custodial money into a personal checking account, even briefly, destroys that separation. If you later face a lawsuit, a divorce, or bankruptcy, commingled funds can become vulnerable to your own creditors. Proving which dollars belonged to the minor is expensive and sometimes impossible, and courts tend to resolve the ambiguity against the custodian. Keep a dedicated account, keep it properly titled, and never move custodial funds through personal accounts.
Record-Keeping and Accountings
Every transaction needs documentation. Deposits, withdrawals, dividends, trades, fees, expenditures. Custodians do not usually file annual reports with a court, but you have to be ready to produce a complete accounting if someone with standing asks for one. Under most state UTMA statutes, a minor who has reached age 14, a parent, a guardian, or any person with an interest in the child’s welfare can petition a court for a full accounting of how the funds have been managed.
This is where sloppy custodians get caught. If you cannot produce records showing what you spent and why, a court can presume the worst, and the burden shifts to you to prove otherwise. That is nearly impossible without documentation. Keep bank statements, brokerage confirmations, receipts, and short notes explaining why each withdrawal benefited the child.
Tax Obligations
The minor is the legal owner of the assets, so account income is taxed under the child’s Social Security number. You are responsible for making sure the tax obligations actually get met.
A dependent child must file a federal income tax return if their unearned income (interest, dividends, and capital gains from the custodial account) exceeds $1,350 in a tax year.2Internal Revenue Service. Check If You Need to File a Tax Return The first $1,350 of unearned income is tax-free. The next $1,350 is taxed at the child’s rate. Unearned income above $2,700 is taxed at the parent’s marginal rate under the kiddie tax rules, which apply to children under 18, 18-year-olds with earned income covering less than half their own support, and full-time students aged 19 through 23 in the same situation.3Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income (Kiddie Tax)
Parents can elect to report a child’s interest and dividend income on their own return using IRS Form 8814, but only if the child’s unearned income is under $13,500 and the child meets certain age requirements.4Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information
On the gift side, contributions to the account are completed gifts. The 2026 annual gift tax exclusion is $19,000 per recipient, and a married couple can combine exclusions to contribute up to $38,000 per child per year without triggering a gift tax return.5Internal Revenue Service. What’s New — Estate and Gift Tax Contributions above that threshold require Form 709, though they usually do not produce actual tax unless the donor has exceeded the lifetime exemption.
Name a Successor Custodian
The account does not disappear if you die or become incapacitated, but the transition can be messy without planning. Most state UTMA statutes let the current custodian designate a successor by signing a written instrument, typically notarized, that takes effect only when you actually die, resign, or become incapacitated.
Without a designated successor, a minor aged 14 or older can generally choose an adult family member, a conservator, or a trust company to take over. Younger minors or situations with no available adult often require a court petition, which costs time and money. Naming a successor while you can is the simple fix.
Handing Over Control at the Age of Majority
Your authority ends when the minor reaches the age specified by the state’s version of UGMA or UTMA.6Social Security Administration. POMS SI SEA01120.205 – The Legal Age of Majority for Uniform Transfer to Minors Act (UTMA) In most states that age is 18 or 21. About a dozen states allow the transferor to specify a later termination age, commonly 25 and in one state up to 30. Whichever age was set when the transfer was made is the one that controls.
When that birthday arrives, you have to transfer full control to the now-adult beneficiary. That means notifying the financial institution, completing whatever paperwork it requires, and removing your name from the account. You cannot legally withhold assets because you disapprove of how the young adult intends to spend the money. The fiduciary relationship is over, and the former minor has the same unrestricted ownership rights as any other adult account holder.
Delays are where this part of the job most often breaks down. A custodian who drags their feet, whether out of concern, control, or procrastination, risks a court ordering immediate release of the funds and awarding the beneficiary legal fees.
What Happens If You Breach These Duties
On the civil side, a court can order you to reimburse the account for any losses caused by the breach, including investment returns the account would have earned. This surcharge comes out of your personal assets. A court can also remove you and appoint a replacement, and you may be ordered to pay the legal fees generated by the proceedings.
Criminal exposure is possible when the conduct goes past negligence. Diverting account funds for personal use can support charges for theft, embezzlement, or misappropriation, depending on the state. The same charges apply to any person who takes property entrusted to their care. Being a parent or relative provides no immunity.
The simplest protection against all of this is to treat the account as belonging entirely to the child, because it does.