Who pays taxes on a UTMA?

The kid does, in their own name and under their own SSN — but the kiddie tax pulls a portion of unearned income up to the parent's marginal rate above the threshold. The 1099-DIV / 1099-B from the broker arrives under the kid's SSN, and the kid (or the parent on the kid's behalf) files the return. Below the threshold, the rate is the kid's rate (typically 0% or 10%). Above the threshold, anything excess is taxed at the parent's rate.

What's the kiddie tax in 2025?

For 2025: the first $1,300 of unearned income is tax-free under the standard deduction for unearned income. The next $1,300 is taxed at the kid's tax rate. Everything above $2,600 is taxed at the parent's marginal tax rate. The thresholds adjust for inflation annually — 2024 was $1,300 / $2,600; 2026 will likely shift slightly upward.

Does the kiddie tax apply to all kids?

It applies to unearned income for kids who are: (a) under 18, OR (b) under 24 and a full-time student whose earned income covers less than half their support. The "still a student dependent" branch catches college kids who would otherwise dodge the kiddie tax by aging out at 18.

How is earned income taxed in a UTMA?

Earned income — wages from a job, self-employment income — is taxed at the kid's regular rate with its own standard deduction (the higher of $1,300 or earned income + $450, capped at the regular standard deduction). The kiddie tax structure only hits unearned income (interest, dividends, capital gains). A kid earning $5,000 from a summer job pays the same way an adult earning $5,000 would, minus the standard deduction.

Do I have to file a tax return for my kid's UTMA?

A return is required if unearned income exceeds $1,300 (2025), or if total gross income exceeds the kid's standard deduction. Many parents elect to report the kid's unearned income on their own return via Form 8814 if it's below $13,000 (2025) — that avoids filing a separate return. Above $13,000, the kid must file their own return.

How much can a UTMA hold before triggering the kiddie tax?

Depends on the dividend / interest yield. At a 2% dividend yield and zero realized gains, a UTMA balance of about $65,000 throws off $1,300/year — exactly the tax-free floor. At 3%, the breakeven is about $43,000. Capital gains depend on what you sell, so this is a moving target. Most families stay under the kiddie tax simply by holding tax-efficient broad-market index funds (low yield) and not realizing gains until the kid takes control.

UTMA tax rules and the kiddie tax, explained

A UTMA is a real brokerage account in your kid's name, and that means the IRS treats every dividend, every interest payment, and every realized capital gain as income — taxed each year. Most explainers stop there and leave parents wondering whether they should bother. The actual answer: at the balances most families hold, the tax bill is modest and easy to plan around. Here's the worked-example version.

How UTMA earnings actually get taxed

A UTMA is a custodial account holding investments for a minor^[1]. The kid is the legal owner, the SSN on the 1099 is the kid's, and the income reports under the kid's name. But the IRS has a catch: a kiddie-tax structure that prevents parents from shifting investment income to a kid's low tax rate just to dodge the parent's higher rate^[2].

The 2025 structure for a kid's unearned income (dividends, interest, realized capital gains, distributions):

First $1,300: tax-free, covered by the standard deduction for unearned income.
Next $1,300 (so income from $1,301 to $2,600): taxed at the kid's ordinary rate (typically 10% — the kid's lowest bracket).
Anything above $2,600: taxed at the parent's marginal rate^[3].

The thresholds shift for inflation each year. 2024 was $1,300 / $2,600. 2025 is $1,300 / $2,600 (no change). 2026 will likely tick upward by a small amount with inflation.

A worked example

Say a UTMA holds $50,000 in a broad-market index fund yielding 1.5% in dividends. The kid is 8 years old.

Annual dividend income: $50,000 × 1.5% = $750.
That falls entirely under the $1,300 floor.
Federal tax owed: $0.

Now scale up. Same fund, same yield, but the UTMA holds $120,000.

Annual dividend income: $120,000 × 1.5% = $1,800.
First $1,300 is tax-free.
Next $500 (the amount between $1,301 and $1,800) is taxed at the kid's 10% rate.
Federal tax owed: $50.

Now scale further. UTMA holds $250,000, same fund, same yield.

Annual dividend income: $250,000 × 1.5% = $3,750.
First $1,300 tax-free.
Next $1,300 at the kid's 10% rate = $130.
Remaining $1,150 taxed at the parent's marginal rate. Assuming the parent is in the 24% bracket: $1,150 × 24% = $276.
Federal tax owed: $406 (1.6% effective rate on the $3,750 of income).

The takeaway: under $50,000 — common UTMA size — the kiddie tax basically doesn't bite. Past that, the bill grows but stays manageable. The tax inefficiency vs. a 529 or custodial Roth IRA is real but small at typical balances. Custodial account vs. 529 plan walks the wrapper-comparison side of this trade.

Earned vs. unearned income — they're taxed differently

The kiddie tax only hits unearned income — investment income passively generated by holding assets. Earned income from a job (W-2 wages, self-employment) is taxed under the kid's regular rules.

For 2025, a kid's standard deduction on earned income is the greater of:

$1,300, or
earned income + $450, up to the regular standard deduction ($14,600 for 2024 / projected $15,000+ for 2025).

So a kid who earns $4,000 lifeguarding gets a standard deduction of $4,450, has effective taxable income of $0, and owes nothing. A kid who earns $20,000 modeling pays tax on $20,000 minus $15,000 = $5,000, at the kid's 10% bracket = $500 federal.

The earned-income vs. unearned-income split matters because parents stacking a custodial Roth IRA on top of a UTMA are tapping the earned-income side. The custodial Roth IRA option covers that wrapper in detail.

Who files the kid's return

Two paths:

Path 1: Kid files her own return. Required if her gross income exceeds her standard deduction, or if her unearned income exceeds $1,300 (2025). The kid's return uses Form 1040 like any adult's. The custodian signs on the kid's behalf. The kid's SSN is on the return.

Path 2: Parent reports the kid's unearned income on the parent's return via Form 8814. Available if the kid's only income is unearned, total unearned income is under $13,000 (2025), and the kid is under 19 (or 24 if a full-time student). Convenient — no separate return — but the income gets taxed at the parent's rate above the kiddie threshold, same way as Path 1 above $2,600. Most families with small UTMAs use this election.

If you're unsure which applies, IRS Publication 929^[3] has the decision tree.

State taxes

State treatment varies. Some states (California, New York) follow the federal kiddie-tax structure. Others (Texas, Florida) have no state income tax at all, so it's federal-only. A handful of states tax all UTMA income at the kid's flat rate without the federal three-tier structure.

The state-by-state map is too detailed for a single section. The shortcut: check your state's Department of Revenue page for "kiddie tax" or "minor unearned income" and read the official language. Most state treatments are simpler than the federal structure, not more complex.

Capital gains and the realization question

Unrealized capital gains aren't taxed. A UTMA holding a fund that grows from $50,000 to $80,000 has $30,000 of unrealized gain — and zero tax owed until you sell.

This is the underrated tax-planning lever for UTMAs. If you hold tax-efficient index funds (low dividend yield, minimal turnover, no annual capital gain distributions) and don't sell, the kiddie tax barely touches the account. Realized gains only happen when you sell the position to:

Rebalance.
Pay an expense for the kid (camp, braces, car).
Transfer the account at the age of majority (the handoff itself isn't a taxable event — the kid keeps the cost basis).

Many parents intentionally hold low-turnover index funds in a UTMA precisely to push the realization to the kid's adult tax years, where the kid's rate is presumably their own (not the parent's).

Gift tax — the contributing side

Separate from the kiddie tax: when you (or anyone) deposits money into a UTMA, that's a gift to the kid. The federal annual gift-tax exclusion for 2025 is $19,000 per giver, per recipient^[4]. Below that, no gift tax filing is required. Married couples can split a gift to use both exclusions — $38,000 jointly to one kid in one year, no filing.

Above $19,000 single / $38,000 joint, you file IRS Form 709 to track the lifetime gift / estate exemption. You don't typically owe gift tax until lifetime gifts exceed about $13.99M (2025), so for almost all parents the filing is administrative rather than expensive.

Common misconceptions

"UTMA earnings are tax-free for the kid because she's a minor." No. The kiddie tax exists specifically to close that loophole. Below $1,300/year of unearned income, it's tax-free under the kid's standard deduction — but that's every taxpayer's standard deduction working, not a UTMA-specific shelter.

"The kid's tax bracket is always lower than the parent's, so a UTMA saves taxes." Below $2,600 of unearned income, this is true. Above $2,600, the parent's rate kicks in and the savings disappear.

"Realized gains in a UTMA push my kid into the 0% capital-gains bracket." Sometimes. The 0% long-term capital-gains rate applies up to about $48,350 of total taxable income (2024 figure, single filer). For an 8-year-old with no other income, you have a lot of room. But if the kiddie tax pulls the income up to the parent's rate, the parent's capital-gains rate (15% or 20%) is what applies — not the 0% rate the kid would qualify for in isolation.

"I should put high-yield investments in the UTMA to keep the dividend income on the kid's SSN." Backwards. Tax-efficient (low-yield) investments minimize the kiddie tax; high-yield investments throw off more taxable income each year. Standard tax-aware portfolio construction puts the high-yield positions in tax-deferred or tax-free wrappers (IRA, 529) and the low-yield positions in the taxable wrapper (UTMA).

Next steps

For the broader account-type comparison, the custodial account guide covers UTMA, 529, custodial Roth IRA, and Trump Accounts in one place. Custodial account vs. 529 plan walks the head-to-head specifically for the school-savings decision.

If your kid was born 2025–2028, the eligibility checker will tell you what the federal $1,000 Trump Account seed and any employer match adds on top of whatever taxable UTMA you're running.

UTMA tax rules and the kiddie tax, explained

How UTMA earnings actually get taxed

A worked example

Earned vs. unearned income — they're taxed differently

Who files the kid's return

State taxes

Capital gains and the realization question

Gift tax — the contributing side

Common misconceptions

Next steps

More on Trump Accounts

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Custodial Roth IRA: how to open one for your kid in 2026

Custodial accounts: a 2026 guide for parents

Trump Accounts: the complete guide

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