California UTMA Account: Custodian Duties, Taxes, and Payout Age

California’s Uniform Transfers to Minors Act, codified at Probate Code sections 3900 through 3925, lets any adult move cash, securities, real estate, or almost any other property to a child through a custodial account without creating a trust. The California UTMA account rules make every transfer irrevocable, hand control to a custodian bound by a prudent-person standard, and require the assets to be turned over to the child at 18 by default, or at an older age (up to 21 for lifetime gifts, up to 25 for transfers from a will or trust) if the account is titled that way from the start.¹

Opening the Account

A UTMA account is opened at a bank or brokerage in a specific registration format: the custodian’s name, followed by “as custodian for [child’s name] under the California Uniform Transfers to Minors Act.” Any adult other than the person making the transfer can serve as custodian, and so can a trust company.¹ From the moment of the transfer, the assets legally belong to the child even though the custodian controls them.

California’s UTMA is broader than many families realize. You can transfer cash, publicly traded securities, life insurance and annuity contracts, real estate, titled personal property like vehicles, and essentially any other type of property through a written instrument.² Each asset type has its own registration or documentation requirements, and the transfer language must follow the statutory format to be valid.

Transfers Are Irrevocable

Once you move assets into a California UTMA account, you cannot take them back. The transfer is irrevocable and the property is vested in the child.¹ If you put $50,000 of stock into a UTMA and later change your mind, there is no legal mechanism to reverse the gift. The child receives whatever is in the account at the termination age regardless of your wishes at that point. This is the single feature that most distinguishes a UTMA account from a savings account or revocable trust, and it is worth sitting with before any money moves.

What the Custodian Must Do

A custodian’s core obligations under California law are to take control of the property, invest and manage it, keep it clearly separated from personal assets, and maintain detailed records of every transaction, including the information needed to prepare the child’s tax returns.³ A parent or the child’s legal representative can inspect those records at reasonable intervals, and the child can inspect them after turning 14.

Investment decisions must meet a prudent-person standard: the custodian should manage the assets the way a careful person would handle someone else’s property. A custodian who serves without compensation (typical for a parent) is shielded from liability for investment losses unless those losses result from bad faith, intentional wrongdoing, gross negligence, or a failure to invest prudently.⁴ That protection does not extend to actively misusing funds.

Spending the Money

A custodian may spend UTMA money on anything that benefits the child, without a court order. The statute gives wide discretion: the custodian can pay out or spend as much of the custodial property as they consider “advisable for the use and benefit of the minor,” and does not need to consider whether anyone else has a duty to support the child or whether the child has other income.¹ Spending UTMA funds does not reduce anyone’s existing child support obligation.

There is a narrower option when the person making the gift is also the custodian. In that case, the transferor-custodian can elect a restricted standard: no funds may be spent before the termination date except by court order, and only for the child’s support, maintenance, or education.¹ This is worth considering when the point of the account is to preserve money for a specific future purpose like college.

Naming a Successor Custodian

A custodian can designate a successor at any time by signing and dating a written instrument before a witness. The designation takes effect only when the custodian resigns, dies, or becomes incapacitated, unless the instrument also includes the custodian’s resignation.¹ The original transferor can also name a successor in the transfer document itself, and that designation takes priority over one later made by the custodian.

If no successor is named and the custodian dies or becomes incapacitated, the fallback depends on the child’s age. A child who is at least 14 can designate a successor from among adult family members, their conservator, or a trust company. If the child is under 14 or does not act within 60 days, the child’s conservator automatically becomes successor. If there is no conservator, any interested person can petition the court to appoint one.¹ Court proceedings are slow and costly, which makes naming a successor at the outset the better path.

When the Child Gets the Money

By default, the custodian must turn over all remaining assets when the child turns 18.⁵ California allows a later age, but only within limits set by how the account was funded.

For irrevocable lifetime gifts, the transfer can be delayed only until the child turns 21.⁶
For transfers that come from a will, a trust, or the exercise of a power of appointment, the transfer can be delayed until the child turns 25.⁶

To use a later age, the registration must say so in statutory form: “as custodian for [name] until age [age] under the California Uniform Transfers to Minors Act.”⁶ If the transfer document is silent on age, the default is 18, and the age cannot be added later. For families who want to control distribution past 21 on a straightforward gift, a UTMA will not do it; a trust is the tool for that.

Tax Rules

Because the assets belong to the child, investment income is reported on the child’s tax return. For 2026, the federal kiddie tax works in three tiers: the first $1,350 of a child’s unearned income is tax-free, the next $1,350 is taxed at the child’s rate, and anything above $2,700 is taxed at the parent’s marginal rate. It applies to children under 18, to 18-year-olds whose earned income does not exceed half their support, and to full-time students aged 19 through 23 under the same earned-income test. If the child’s investment income stays under $13,500 and consists only of interest, dividends, and capital gain distributions, a parent may elect to report it on their own return using Form 8814 instead of filing one for the child.⁷

The practical effect: meaningful tax savings run out at $2,700 of annual investment income. Above that, the parent’s rate applies anyway, so there is a case for holding tax-efficient index funds or growth positions that do not throw off large yearly distributions.

Gift Tax on Contributions

Every contribution to a UTMA account is a completed gift for federal tax purposes. In 2026 the annual gift tax exclusion is $19,000 per recipient.⁸ Spouses can each give up to that amount to the same child in the same year, for a combined $38,000, with no gift tax filing. Gifts over the exclusion count against your lifetime estate and gift tax exemption and require filing Form 709, though no tax is owed until the lifetime exemption is used up.

The Donor-Custodian Estate Trap

Families regularly trip up here. If you transfer assets to a UTMA and also serve as custodian, those assets may be pulled back into your taxable estate if you die before the child reaches the termination age. Federal law includes in a decedent’s gross estate any transferred property over which the decedent kept the power to direct how it is used or distributed.⁹ A custodian’s broad authority to spend UTMA funds for the child’s benefit can be treated as that kind of retained power. The fix is to name someone other than the donor as custodian. If a grandparent funds the account, a parent can serve. If a parent funds it, the other parent or another trusted adult can serve.

Effect on College Financial Aid

A UTMA account can meaningfully reduce the child’s financial aid eligibility, and this is the piece that surprises families most. Because the account legally belongs to the child, the FAFSA treats it as a student asset. The federal formula assesses student assets at 20% per year, so a fifth of the UTMA balance is counted toward college costs annually.¹⁰ Parent-owned assets like a 529 plan are assessed at a maximum rate of about 5.64%. Schools that use the CSS Profile for institutional aid also treat UTMA balances as student assets. If need-based aid is part of the plan, a 529 or an irrevocable trust may fit the goal with far less damage to eligibility.

If a Custodian Mismanages the Account

Custodians who misuse UTMA assets face real exposure. Courts have ordered custodians to return improperly spent funds with interest, pay any tax liability the child incurred, and cover the child’s attorney’s fees, which in some cases have exceeded the account’s total value. The protection for an uncompensated custodian covers ordinary investment losses; it does not cover bad faith, gross negligence, or spending the child’s money on yourself.⁴ Keeping clean records and a strictly separate account is the custodian’s best defense if the management is ever questioned.

1
Justia Law. California Probate Code 3900-3925 – California Uniform Transfers to Minors Act
2
California Legislative Information. California Probate Code 3909
3
California Legislative Information. California Probate Code Part 9 – California Uniform Transfers to Minors Act
4
California Legislative Information. California Probate Code 3912
5
California Legislative Information. California Probate Code 3920
6
California Legislative Information. California Probate Code 3920.5
7
Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income (Kiddie Tax)
8
Internal Revenue Service. What’s New – Estate and Gift Tax
9
Office of the Law Revision Counsel. 26 USC 2038 – Revocable Transfers
10
Federal Student Aid. 2025-2026 Student Aid Index (SAI) and Pell Grant Eligibility Guide