Key Takeaways
- Covered calls, mostly: most brokers cap custodial options at writing calls against shares the account already holds.
- The child owns it: a UGMA or UTMA transfer is irrevocable and vests in the minor immediately.
- No margin, no spreads: custodial accounts are cash accounts, which removes most multi-leg positions.
- The child's tax bill: premium and assignment gains are the minor's unearned income, not the parent's.
- They get the keys: at the state's termination age the former minor controls the account outright.
Trading options in a custodial account is possible at many large brokers, but the menu is far shorter than in an ordinary taxable account. Writing covered calls against stock the account already holds is the common ceiling, and Fidelity's options application says so in one line: custodial UGMA and UTMA accounts are eligible only for writing covered calls on equity options.
Three constraints stack up to produce that answer, and none of them is a broker being timid. The account is legally the child's property and the adult running it is a fiduciary. The options approval rules attach to the customer, and the customer is a minor with no income and no trading history. And custodial accounts are cash accounts, so the collateral that multi-leg and uncovered positions run on is simply not there.
What a Custodial Brokerage Account Actually Is
The ownership rule: the money belongs to the child from the moment it lands.
A custodial brokerage account is an account an adult opens and controls for a minor under a state's Uniform Gifts to Minors Act (UGMA) or Uniform Transfers to Minors Act (UTMA). The adult is the custodian, the child is the beneficial owner, and the account is reported under the child's Social Security number. Vanguard's description is typical of the industry: the minor owns the assets in the account.
The gift runs one way only. Texas's version of UTMA puts it in a single sentence: a transfer made under Section 141.010 is irrevocable, and the custodial property is indefeasibly vested in the minor. State statutes here are built on a uniform act, so the wording is close to identical from state to state. A parent who funds a custodial account cannot change their mind, cannot take the money back, and cannot redirect it to a sibling.
That ownership fact is what drives the custodian's legal duty. The same statute requires a custodian to observe the standard of care that would be observed by a prudent person dealing with property of another. Read the last four words again.
The custodian is not managing their own money, and the standard is not what they would tolerate in their own account.
The custodianship also ends on a schedule the custodian does not set. Texas requires the property to be delivered to the minor at 21 for gifts, and at the age of majority where the transfer came from a fiduciary or an obligor. Other states set 18 or let the donor pick, and Vanguard notes that state rules vary on both the age of majority and the age at which the custodianship must terminate.
Why Options in a Custodial Account Stop at Covered Calls
The approval rule: the firm must approve the account against the customer's own profile, and the customer is a child.
FINRA Rule 2360 governs options accounts. Before an account trades options the firm has to furnish the options disclosure document, exercise due diligence to learn the essential facts about the customer's financial situation and investment objectives, and have a Registered Options Principal or branch manager specifically approve the account in writing.
The information the rule tells firms to collect reads like an inventory of everything a minor does not have. It lists investment objectives, employment status and employer, estimated annual income from all sources, net worth and liquid net worth, marital status and number of dependents, age, and investment experience measured in years, size, and frequency of transactions. Age is on that list explicitly. A nine-year-old returns a blank or a zero on most of the others.
Firms turn that profile into an approval level, and the trading levels ladder is where the restriction becomes concrete. Fidelity's application runs A through E: A is covered call writing on equity options; B adds long calls and puts, cash-covered put writing, straddles and combinations, collars and conversions, and hedged puts; C adds equity and index spreads plus covered put writing; D adds uncovered equity writing; E extends further into uncovered index positions. Custodial accounts are held at A.
Then there is margin, which does most of the actual work. Interactive Brokers states the position for UGMA and UTMA accounts in four words: margin is not available. That is less a house preference than a consequence of the fiduciary posture, because borrowing against a child's property to enlarge a position sits awkwardly next to a prudent person dealing with the property of another.
Cash-account status is what removes the rest of the strategy list. FINRA's guide to brokerage accounts explains the split: a cash customer pays for a purchase in full, while under Federal Reserve Board Regulation T a firm can lend a margin customer up to 50 percent of the purchase price of a stock. Vertical spreads, naked puts, and short strangles all price their collateral off that credit relationship, so taking the credit line away leaves them nowhere to post. Our explainer on cash and margin accounts for options covers those trade-offs in an ordinary account.
A covered call is the one options position that needs no credit. The shares the account already owns are the collateral, so nothing has to be borrowed against a child's property.
Working Through a Covered Call in a Custodial Account
The multiplier: one standard equity contract covers 100 shares, and those 100 shares are the collateral.
Suppose a custodial account holds 100 shares of XYZ, bought years earlier at $40 and now trading at $50. The custodian writes one XYZ 55-strike call expiring in two months and collects $1.50 per share in premium. The premium credited is $1.50 times 100 shares, or $150, and it is in the account immediately.
Now take the two outcomes at expiration in turn.
If XYZ finishes below $55. In this scenario the call expires worthless, the account keeps the $150, and the 100 shares stay put.
If XYZ finishes at $60. In this scenario the call is in the money and the account is assigned, so the shares are sold at the $55 strike. Work the arithmetic through:
- Sale proceeds: $55 times 100 shares = $5,500
- Cost basis: $40 times 100 shares = $4,000
- Realized capital gain: $5,500 minus $4,000 = $1,500
- Plus the premium already collected: $150
- Total realized in the account: $1,650
- Upside given up above the strike in this scenario: ($60 minus $55) times 100 = $500
The $500 of forgone upside is the real cost of the position, and it is the part that gets glossed over when a covered call is described as income. What matters more in a custodial account is the line beneath it. That $1,650 is the child's, and it is unearned income. The IRS applies the tax on a child's unearned income once the total passes a threshold it indexes annually, which was $2,700 for the 2025 tax year, at which point Form 8615 can push the excess up to the parent's rate. A single assignment in a quiet year can move a custodial account across that line.
How a Custodial Account Differs From a Regular Brokerage Account
The account people usually compare this to is an ordinary taxable brokerage account in the parent's name, and the two differ on every dimension that matters for options:
| Dimension | Regular brokerage account | Custodial UGMA or UTMA account |
|---|---|---|
| Ownership | Belongs to whoever opened it | Belongs to the minor; the custodian only administers it |
| Reversibility | Money moves in and out freely | The transfer is irrevocable and cannot be redirected |
| Standard of care | None owed to anyone else | Prudent person dealing with the property of another |
| Margin | Available once approved | Cash only at the firms that publish a policy |
| Options ceiling | The full ladder, if the profile supports it | The lowest tier, commonly covered calls only |
| Taxation | Taxed to the owner at the owner's rate | The child's unearned income; the kiddie tax can apply |
| Control | Stays yours indefinitely | Passes to the former minor on a statutory date |
The distinction matters most at the point where people assume the two behave alike. A parent comfortable running spreads in their own account often opens a custodial account expecting the same toolkit and a smaller balance, then discovers the approval is capped no matter how experienced the adult is. The approval attaches to the customer, and the adult is not the customer.
One more account gets confused with this one. A custodial Roth IRA is not a UGMA or UTMA account: it requires the child to have earned income, and its options permissions follow retirement-account rules rather than custodial ones. Fidelity's application treats the two categories separately and allows retirement accounts a wider strategy list than custodial accounts get.
Why It Matters to Traders and Parents
The practical consequence is that a custodial account is a poor vehicle for teaching options and a reasonable one for holding stock. Most of what an options education consists of, defining risk with spreads, adjusting a position, rolling a short strike out and up, is unavailable at level A. What remains is a single position type with a specific payoff shape and a real opportunity cost.
The second consequence is about suitability rather than permission. A covered call caps upside in exchange for premium, which is defensible over a short horizon and strange in an account whose whole purpose is a long compounding runway for a child. The prudent-person standard is the question to ask before the approval level is, and the risks of trading options matter more here than in an account where the downside lands on the person who chose it.
The third is that the exit is not yours. Whatever the account holds on the statutory termination date goes to the former minor, open short calls included. A position that made sense as a two-month trade can outlive the custodian's authority to manage it.
Edge Cases and Gotchas
Assignment does not wait for the custodian. Equity options are American-style, so a short call can be assigned any business day it is in the money, not only at expiration. The account delivers the shares whether or not the custodian is watching, and the gain lands in the child's tax year.
Selling the shares breaks the cover. The moment the underlying stock leaves the account, an open short call stops being covered and becomes an uncovered position the account is not approved to hold. Brokers generally block the sale or force a buy-to-close first, but the ordering trap catches people who treat the two legs as independent.
Broker policy is not uniform and it changes. Fidelity publishes a flat restriction to covered calls. Interactive Brokers publishes a flat margin prohibition. Others fold covered calls and cash-secured puts into one lowest tier. Confirm your own firm's rule in writing before planning around it, which is one more thing to weigh when choosing a broker.
Protective puts may or may not be available. Buying a put against stock the account already owns is a risk-reducing position, and some firms allow it at their lowest tier while Fidelity places protective puts in level B alongside long calls. Do not assume a hedge is permitted just because it lowers risk.
Withdrawals have to benefit the minor. Premium collected in a custodial account is not household money. It belongs to the child along with everything else in the account, and using it for anything other than the minor's benefit is a problem with the custodianship rather than with the trade.
FAQ
These answers are for the adult running the account, and they assume you know what a call option and an expiration date are. They cover what people ask once they have found the approval screen and been told no.
Can You Trade Options in a Custodial Account at All?
At many large brokers, yes, but only at the lowest approval tier. Fidelity's options application states that custodial UGMA and UTMA accounts are eligible only for writing covered calls on equity options. Other firms set their own policy and some decline options in custodial accounts entirely.
Can a Custodial Account Sell Cash-Secured Puts?
Not at every broker, and it is not safe to assume. Fidelity places cash-covered put writing at level B and holds custodial accounts at level A, which is covered calls only. Some firms group covered calls and cash-secured puts into a single lowest tier, which is why this is a question to put to your own broker directly.
Why Can't a Custodial Account Trade Spreads?
Spreads need a margin account and custodial accounts are cash accounts. Interactive Brokers states that margin is not available for UGMA and UTMA accounts, and FINRA describes the split as the difference between paying in full and borrowing against the position. Without that credit relationship the short leg of a spread has no collateral mechanism.
Who Pays the Tax on Options Gains in a Custodial Account?
The child does, because the account is the child's property. Premium collected and any capital gain on assigned shares are the minor's unearned income, and the IRS applies the tax on a child's unearned income once that income passes an annually indexed threshold, which was $2,700 for the 2025 tax year.
What Happens to Open Positions When the Child Reaches the Termination Age?
The account and everything in it becomes the former minor's outright. Texas requires transfer at 21 for gifts and at the age of majority where the transfer came from a fiduciary, while other states set 18 or let the donor choose. Any open short call transfers with it.
