A custodial account is a bank or brokerage account an adult opens and manages on behalf of a child, with the assets legally belonging to the child from the moment they’re deposited. These accounts operate under one of two state laws — the Uniform Gifts to Minors Act (UGMA) or the Uniform Transfers to Minors Act (UTMA) — and they give families a simpler alternative to a formal trust when they want to set money aside for a minor. The catch that trips up most parents: the money is the child’s, permanently, and the child gets full control of it at the age of majority set by state law, which can fall anywhere from 18 to 30.
UGMA or UTMA: Which One to Open
The two account types differ in what they can hold. A UGMA account is limited to financial assets: cash, stocks, bonds, and mutual funds. A UTMA account accepts all of that plus real estate, artwork, patents, royalties, and other non-financial property. If you’re only transferring cash or securities, either one works. If you might contribute anything else, you need a UTMA.
Nearly every state has adopted the UTMA, with only South Carolina and Vermont historically operating under UGMA alone.1Social Security Administration. SI SEA01120.205 – The Legal Age of Majority for Uniform Transfer to Minors Act (UTMA) Most families end up with a UTMA by default, and when a brokerage offers both, UTMA is usually the better choice for its broader asset flexibility.
The Gift Is Irrevocable
Every dollar you contribute belongs to the child immediately and permanently. You cannot pull the money back. You cannot redirect it to a sibling. You cannot change the beneficiary. That’s fundamentally different from a 529 education savings plan, where the beneficiary can be swapped to another family member.
Because the child is the legal owner, the assets generally cannot be used to satisfy obligations that already belong to the parent. A custodian cannot spend the money on basic food, clothing, or shelter that a parent is legally required to provide. Funds must go toward expenses that specifically benefit the child beyond ordinary parental support — tutoring, summer programs, a first car, college costs, and similar things.
One more consequence of ownership: creditors. Once assets belong to the child, they can be reached by the child’s creditors later in life. A formal trust offers more shielding, which is worth thinking about for larger gifts.
What the Custodian Can and Can’t Do
The custodian is a fiduciary. Every investment decision and every withdrawal must serve the child’s interests, not the custodian’s. A custodian who dips into account funds for personal expenses or makes reckless investment choices can face a civil lawsuit from the beneficiary seeking restitution.
Day-to-day authority is broad. You can buy and sell securities, rebalance the portfolio, and make withdrawals for the child’s benefit without court approval. Document everything. Keep records of each expenditure and the reason behind it. Federal regulations governing fiduciary accounts require retaining those records for at least three years after the account terminates or any related litigation concludes, whichever comes later.2eCFR. 12 CFR 150.420 – How Long Must I Keep These Records? Holding onto receipts and transaction logs until a few years past the child’s age of majority is the safest approach.
How Account Earnings Are Taxed
Investment income inside a custodial account is subject to the “kiddie tax.” A small amount is sheltered, a middle band is taxed lightly, and anything above a set threshold is taxed at the parent’s rate so families can’t shift large portfolios into a child’s name to dodge higher brackets.
For 2026, the thresholds work like this:
- The first $1,350 of unearned income is tax-free, covered by the dependent’s standard deduction.3Internal Revenue Service. Rev. Proc. 2024-40
- The next $1,350 is taxed at the child’s own rate, usually the lowest bracket.
- Anything above $2,700 is taxed at the parent’s marginal rate, calculated on Form 8615.4Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income (Kiddie Tax)
The kiddie tax applies to children under 18 and, in some situations, to full-time students under 24 who don’t provide more than half their own support.5Internal Revenue Service. Instructions for Form 8615 – Tax for Certain Children Who Have Unearned Income Capital gains, dividends, and interest all count as unearned income here.
Reporting the Child’s Income on Your Return
If the child’s only income is interest and dividends totaling less than $13,500, parents can elect to report it on their own return using Form 8814 instead of filing a separate return for the child.6Internal Revenue Service. Instructions for Form 8814 This simplifies paperwork but doesn’t always save money. Your return absorbs the child’s income at your tax rate, which can produce a higher total tax bill than filing separately. Run the numbers both ways before choosing.
Financial Aid: The Hidden Cost
This is where custodial accounts can quietly cost a family thousands of dollars. Because the child legally owns the assets, the FAFSA treats a custodial account as a student asset rather than a parent asset. The federal formula assesses 20% of a dependent student’s assets when calculating the Student Aid Index, compared to a maximum of roughly 5.64% for parent-held assets.7Federal Student Aid. Student Aid Index (SAI) and Pell Grant Eligibility Private colleges using the CSS Profile often assess student assets at 25%.
Investment income from the account also counts as student income on the FAFSA and gets assessed at 50%. A $50,000 custodial account generating $2,000 in annual dividends reduces aid eligibility by roughly $11,000 over the course of college under the federal formula alone. Families planning to apply for need-based aid should weigh this trade-off carefully against alternatives like a parent-owned 529 plan.
Opening and Funding the Account
Most brokerages and banks let you open a custodial account online in about 15 minutes. You’ll need identifying information for yourself and the child: full legal names, Social Security numbers, dates of birth, and a permanent address. The child’s date of birth determines when the custodianship ends, so accuracy matters. Federal customer identification rules require the institution to verify this information before activating the account.8Financial Crimes Enforcement Network. Questions and Answers Regarding the Customer Identification Program Rule
During setup, you’ll choose between a UGMA or UTMA designation. Some institutions default to whichever your state has adopted. Once you submit the application, you can fund the account through an electronic bank transfer, a check deposit, or by re-registering assets like stock certificates in the custodian’s name for the benefit of the minor.
Gift Tax Limits
Contributions count as gifts for federal tax purposes. For 2026, you can give up to $19,000 per child without triggering any gift tax reporting requirement.9Internal Revenue Service. Frequently Asked Questions on Gift Taxes Two parents giving together can contribute up to $38,000 per child in the same year. If you exceed the annual exclusion, you’ll need to file Form 709 with your tax return for that year, though you won’t owe any actual gift tax until your cumulative lifetime gifts surpass the lifetime exemption.10Internal Revenue Service. Instructions for Form 709
Anyone can contribute, not just the custodian. Grandparents, aunts, uncles, and family friends can all make gifts up to the $19,000 annual limit per donor. Each contribution becomes irrevocable the moment it clears.
When the Custodianship Ends
The custodial relationship terminates when the minor reaches the age of majority defined by their state’s law. The most common ages are 18 and 21, but several states allow UTMA custodianships to extend to 25, and Wyoming permits extensions as late as age 30.1Social Security Administration. SI SEA01120.205 – The Legal Age of Majority for Uniform Transfer to Minors Act (UTMA) The specific age often depends on what the original transferor selected when creating the account, within the range their state allows.
Once that birthday arrives, the custodian loses all authority. The former minor gets unconditional control and can spend the money on anything: college, a car, a trip around the world, or nothing productive at all. The custodian’s fiduciary duty ends completely. To close things out, the custodian notifies the financial institution and submits a transfer form moving the assets into an individual account in the beneficiary’s name.
Name a Successor Custodian Now
If the custodian dies or becomes incapacitated without naming a successor, appointing a replacement gets complicated. State law governs this and the procedures vary, but the general framework runs like this: if the minor is old enough (typically 14 or older), they may be able to designate a successor themselves; otherwise the child’s legal guardian steps in; and if no guardian exists, the court appoints someone after a petition from a family member or other interested party. A notarized letter designating a successor, filed with the financial institution, costs almost nothing and prevents account assets from sitting frozen while a court sorts out who takes over. If you’re the custodian on a meaningful balance, do this now rather than assuming it will get handled automatically.