Who Claims the Income on a Custodial Account, and Who Pays the Tax?

The minor child claims the income on a custodial account, the child is the legal beneficial owner of all UGMA/UTMA assets and the taxpayer of record. In 2026, the first $1,350 of unearned income is tax-free, the next $1,350 is taxed at the child's rate, and amounts above $2,700 are taxed at the parent's marginal rate under the kiddie tax (Investopedia, 2026).

The child claims the income on a custodial account. Under UGMA and UTMA rules, the minor is the beneficial owner of every asset in the account, and of every dollar those assets generate. But claiming and paying are two different things. The IRS kiddie tax can shift the actual tax bill to the parent's marginal rate once unearned income crosses $1,350 in 2026 (Investopedia). What follows explains exactly who files what, when, and why the most common mistake triggers an IRS mismatch notice.

The Short Answer: The Child Owns the Income

A UGMA or UTMA custodial account belongs to the minor. The adult who opens it acts as custodian, a manager with fiduciary duties, but never as an owner. This distinction, rooted in the Uniform Gifts to Minors Act and Uniform Transfers to Minors Act, determines everything at tax time.

Investopedia states the rule plainly: “The minor or beneficiary is considered the owner of all assets in a UGMA account and the income they generate for tax purposes” (Investopedia). The custodian's name may appear on the account, but the child's Social Security number is the one attached to it. Every 1099-DIV, 1099-INT, or 1099-B issued for that account carries the child's SSN, not the parent's.

This ownership structure is irrevocable. Once an adult transfers assets into a custodial account, the gift is complete and belongs to the minor. The custodian cannot take the money back to cover household expenses, nor can they redirect the assets to another child. The funds must be used for the minor's benefit, and at the age of majority, control transfers fully and automatically.

Custodian vs. Beneficial Owner: What the Difference Means at Tax Time

At tax time, the practical consequence is simple: the child's Social Security number on the 1099 forms dictates who the IRS expects to report that income. The custodian manages investments, reinvests dividends, or sells assets, but the IRS does not look to the custodian for the tax. The child is the taxpayer of record.

A parent who receives a 1099-DIV in the mail addressed to their child should not interpret that as permission to enter the amount on their own Schedule B. The IRS computer-matching system cross-references Social Security numbers on information returns with tax return filings. A mismatch triggers an automated notice.

When Ownership Transfers Fully to the Child

The age at which the minor gains full control varies by state and by account type. Under UGMA, the age of majority is typically 18 or 21. Several UTMA states allow the custodian to delay transfer until age 25 if the transfer document specifies it (NerdWallet, May 2026).

At that point, the custodian's role ends. The now-adult beneficiary can withdraw funds, continue investing, or close the account. The tax treatment does not change at majority, the income was always the child's, but the filing logistics shift from a parent-managed process to the young adult's direct responsibility.

How Custodial Account Income Is Taxed in 2026: The Three-Tier System

Ownership answers who claims the income. The three-tier kiddie tax framework answers who actually pays. Congress designed the kiddie tax to close a loophole: wealthy parents shifting investment assets to their children to exploit the child's lower tax bracket. The result is a stair-step system where income below certain thresholds stays at the child's rate, and income above jumps to the parent's.

For more depth, see who has tax liability in a custodial account? 2026 irs rules.

Comprendre les règles fiscales est essentiel, notamment pour savoir si les prêts de crypto-monnaie sont imposables selon les directives de l'IRS pour 2026.

For 2026, the tiers work as follows (Investopedia, 2026):

• Tier 1, Tax-free: The first $1,350 of unearned income is exempt from federal income tax. This functions as the child's standard deduction for investment income.
• Tier 2, Child's rate: Unearned income falling between $1,350 and $2,700 is taxed at the child's own marginal rate. For most children with no other income, this means the lowest bracket.
• Tier 3, Parent's rate: Unearned income above $2,700 is taxed at the parent's marginal federal rate, not the child's.

Earned income, wages from a part-time job, for example, follows separate rules and does not mix with these unearned-income thresholds. A teenager with both a summer job and a dividend-paying UTMA account may need to navigate two parallel tax calculations.

To understand exactly who actually pays the kiddie tax, the distinction between the child as taxpayer of record and the parent's rate as the effective tax burden is central.

The $1,350 Tax-Free Threshold (2026)

The $1,350 figure represents the standard deduction equivalent for a child's unearned income. If the custodial account generates dividends, interest, or short-term capital gains of $1,200 in a calendar year, the entire amount is tax-free, no return required for that income.

This threshold applies only to unearned income. A minor with earned income from employment gets the regular standard deduction for that portion ($14,600 for single filers in 2026), separate from the unearned-income limit. The two do not combine into a larger single exemption.

Investment income includes:

• Dividends from stocks or ETFs held in the custodial account
• Interest from bonds, CDs, or the cash sweep portion of the brokerage account
• Capital gain distributions from mutual funds
• Short-term capital gains from sales executed by the custodian
• Taxable portion of scholarship or fellowship grants (treated as unearned income in certain cases)

When the Kiddie Tax Kicks In and Shifts the Rate to Parents

The kiddie tax threshold for 2026 sits at $2,700 of unearned income, the point where the parent's marginal rate replaces the child's rate on every additional dollar above that line.

Take a parent in the 24% federal bracket. The child's UTMA account generates $3,500 in dividends. The first $1,350 is tax-free. The next $1,350 is taxed at the child's rate (likely 10%, resulting in $135). The remaining $800 is taxed at 24%, not 10%, yielding $192 instead of $80. The kiddie tax adds $112 to the family's total tax bill for that account.

This mechanism effectively prevents income splitting as a tax-avoidance strategy. The child remains the taxpayer of record, but Form 8615 applies the parent's rate to the upper tranche of investment earnings.

For a full breakdown of custodial account tax rules for 2026, the $2,700 trigger and the mechanics of Form 8615 are explored in more detail.

Which Children Are Subject to the Kiddie Tax?

The kiddie tax applies to three categories of children, per IRS Publication 929:

• Children under 18 at year-end
• 18-year-olds whose earned income does not exceed half of their own support
• Full-time students aged 19 to 23 whose earned income does not exceed half of their own support

A 20-year-old who works full-time and self-supports is exempt from the kiddie tax, their custodial account income is taxed entirely at their own rate, regardless of amount. But a 20-year-old full-time college student whose parents provide more than half their support remains subject to it.

The test is applied annually. A child who triggers the kiddie tax at 19 may escape it at 20 if their financial situation changes. The custodian should reassess each tax year.

The essentials

• The minor child is the legal owner and taxpayer of record for all income in a UGMA or UTMA custodial account.
• The first $1,350 of custodial account unearned income is exempt from federal tax in 2026; the next $1,350 is taxed at the child's rate.
• Above $2,700 in unearned income, the kiddie tax applies and the excess is taxed at the parent's marginal rate.
• A parent who claims custodial account income on their own return without filing Form 8615 or Form 8814 will likely receive an IRS CP2000 mismatch notice.
• Custodial Roth IRAs follow fundamentally different rules: the child must have earned income, and qualified distributions are tax-free.

Worked Example: A 14-Year-Old's UTMA Account Earns $3,200 in Dividends

Consider a 14-year-old named Alex whose UTMA brokerage account holds a diversified stock portfolio funded by gifts from grandparents over several years. In 2026, the account generates $3,200 in qualified dividends. Alex has no job, zero earned income for the year.

Here is how the three-tier system applies:

Total estimated federal tax: $255

Alex must file Form 8615 with a separate tax return. The parent's tax return does not include this income, but the parent must provide their filing status and taxable income to complete Form 8615, the form needs the parent's rate to calculate the Tier 3 tax.

If the same account generated only $1,100 in dividends, no return would be required. The entire amount falls within the $1,350 tax-free tier. The custodian should still retain the 1099-DIV for records, but no filing obligation exists.

This scenario assumes a single filing parent with $120,000 in taxable income (placing them in the 24% marginal bracket for 2026). Actual outcomes vary by the parent's specific bracket, state tax rules, and whether the dividends are qualified (taxed at long-term capital gain rates rather than ordinary income rates). A tax professional can model the precise outcome for a given situation.

Who Actually Files the Return? Parent, Child, or Both?

The child files their own return. A custodial account generates 1099 forms under the child's Social Security number, and the IRS matching program expects those amounts to appear on a return filed under that same SSN. The parent's return is not the designated destination for that income.

IRS Publication 929 lays out the filing requirements for dependents with investment income (IRS). A child must file Form 1040 if:

• Unearned income exceeds $1,350
• Earned income exceeds the standard deduction for single filers
• Gross income exceeds the larger of $1,350 or earned income plus $450

When the kiddie tax applies, unearned income above $2,700, Form 8615 (Tax for Certain Children Who Have Unearned Income) must accompany the child's 1040. This form imports the parent's taxable income and filing status to compute the tax on the upper tranche of investment earnings (IRS).

For children too young to sign a return, the parent or legal guardian signs on their behalf, noting the capacity ("parent for minor child") on the signature line.

Form 8615: When the Child Files It

Form 8615 is the mechanism that applies the parent's rate to a child's excess unearned income. It requires the parent's taxable income from their own return, information the child obviously cannot determine alone. The parent must supply this data.

The form calculates two hypothetical taxes: one on the child's income using the child's rate, and one using the parent's top marginal rate on the Tier 3 portion. The difference is the kiddie tax, payable by the child, not the parent.

Form 8615 must be attached to the child's own Form 1040. It is not filed with the parent's return. Many tax software packages handle Form 8615, but the workflow requires inputting the parent's return data first, then generating the child's return with the linked rate information.

The Parental Election Option and Its Trade-offs

The IRS offers a shortcut. Under the parental election, a parent may report a child's interest and dividend income directly on their own return using Form 8814. This eliminates the need for a separate child return.

Several conditions must be met:

• The child's only income is interest and dividends (including capital gain distributions)
• Total gross income falls below a set threshold (consult Form 8814 instructions for the current year)
• No estimated tax payments were made in the child's name
• The child is not subject to backup withholding

This election comes with a trade-off. By reporting the income on the parent's return, the child's $1,350 tax-free tier and the lower-rate second tier are effectively forfeited. The first dollar above a small exemption is taxed at the parent's marginal rate immediately. For a child with income very close to the $1,350 threshold, the election may simplify filing without much cost. For a child with several thousand dollars in dividends, the extra tax can be substantial.

Parents should run both calculations, child files separately with Form 8615 vs. parental election on Form 8814, before choosing. The difference is often meaningful.

The Most Common Mistake: Parents Claiming the Income as Their Own

A parent receives a 1099-DIV showing $2,800 in dividends from their child's UTMA account. The 1099-DIV carries the child's Social Security number. The parent enters the $2,800 on their own Schedule B and files their joint return.

Six to eighteen months later, an IRS CP2000 notice arrives. The IRS automated underreporter program has matched the 1099-DIV under the child's SSN to the child's tax account, and found no corresponding return. The parent's return shows the income, but under a different SSN. Result: a proposed adjustment, interest on the underpayment, and potential accuracy-related penalties.

This is the single most common custodial-account tax mistake. The fix is procedural, not conceptual:

1. Do not amend the parent's return to remove the income. The child needs their own return.
2. File Form 1040 for the child with Form 8615 attached, reporting the 1099-DIV income correctly.
3. Respond to the CP2000 notice with the child's newly filed return and an explanation of the mismatch.

The cost of the mistake is a few hours of paperwork and possibly the IRS interest clock running during the delay. The IRS does not impose punitive penalties for a good-faith misreporting corrected upon notice, but the process is avoidable entirely by filing correctly the first time.

What about Form 8814 as a correction path? It is not retroactive. If the child's income qualifies for the parental election, using it from the start prevents the mismatch. Filing it after the fact to correct a misreported entry on the parent's Schedule B requires careful coordination, and may not be accepted without a corresponding amended return. A tax preparer can advise on the cleanest correction sequence.

Custodial Roth IRAs: A Special Case With Different Rules

A custodial Roth IRA looks similar on paper, an adult manages an investment account for a minor, but the tax logic is inverted. UGMA/UTMA accounts generate taxable income annually; a custodial Roth IRA generates no current-year tax obligation at all, provided distributions are qualified.

The catch is the funding mechanism. Contributions to any IRA, including a custodial Roth, require the account holder to have earned income. A minor who receives only investment income or gifts cannot contribute. The child needs W-2 wages or self-employment income.

This makes custodial Roth IRAs powerful for teenagers with part-time jobs. A 16-year-old earning $4,000 as a camp counselor can contribute up to that $4,000 into a custodial Roth IRA in 2026 (NerdWallet, April 2026). Those contributions grow tax-free, and qualified withdrawals in retirement face zero federal tax.

For readers interested in custody arrangements outside the traditional brokerage context, non-custodial bitcoin loans present a contrasting model where the borrower retains control of the collateral, a fundamentally different risk profile from the fiduciary custody discussed here.

Earned Income Requirement for the Minor

The IRS defines earned income for IRA contribution purposes as wages, salaries, tips, professional fees, and net earnings from self-employment. Allowance from parents, gift money, investment income, and scholarship stipends (in most cases) do not count.

Contributing without earned income triggers an excess-contribution penalty: 6% of the excess amount per year until corrected. The custodian should verify the child's earned income each year before funding the Roth IRA.

The earned income requirement makes custodial Roth IRAs unavailable for young children without jobs. A custodial UGMA/UTMA account remains the standard vehicle for investing gifts and transferring wealth to minors who have no employment income.

How the $7,500 Contribution Cap Works in 2026

For 2026, the custodial Roth IRA contribution limit follows the standard IRA cap: the lesser of $7,500 or the minor's total earned income for the year (NerdWallet, April 2026). Key points:

• A teenager earning $3,000 can contribute $3,000, not $7,500
• A teenager earning $9,000 can contribute the full $7,500
• The contribution deadline is the tax filing deadline (April 15, 2027, for 2026 contributions)
• The custodian controls the account until the child reaches the age of majority under state law

The $7,500 IRA limit applies to all IRA contributions combined. If the minor somehow holds both a traditional IRA and a Roth IRA, the $7,500 ceiling covers the total across both accounts.

Sources

• irs.gov
• investopedia.com
• nerdwallet.com
• nerdwallet.com

This content is educational and should not be read as an investment recommendation. Speak with a licensed advisor for guidance tailored to your circumstances.