Do You Have to Pay Taxes on Custodial Accounts? Your 2026 Answer

Yes, custodial account earnings are taxable every year. The IRS treats the minor child as the account owner, and the kiddie tax (IRC Section 1(g)) governs the rates. For 2026, the first $1,350 of unearned income is tax-free, the next $1,350 is taxed at the child's rate (typically 10%), and any amount above $2,700 is taxed at the parent's marginal rate (IRS Topic 553, June 2026).

Yes, custodial account earnings are taxable, every year. The IRS treats the minor child as the account owner, and the kiddie tax (Internal Revenue Code Section 1(g)) controls how those dividends, interest, and capital gains are taxed. For 2026, the first $1,350 of 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 (IRS Topic 553, June 2026). The real planning question is not whether you owe taxes, you do, but who files the return and whether electing Form 8814 to report the child's income on your own return quietly costs you more than filing a separate child return would.

In brief

• Custodial accounts (UGMA/UTMA) are NOT tax-sheltered: all interest, dividends, and realized capital gains are taxable every year.
• The 2026 kiddie tax brackets: $1,350 tax-free, next $1,350 at child's rate, above $2,700 at parent's marginal rate (IRS Topic 553, June 2026).
• Contributions to a custodial account are NOT taxed as income, they fall under gift tax rules and the annual exclusion typically shields them.
• Form 8814 lets parents report a child's income on their own return, but it adds that income to the parent's AGI, potentially triggering bracket creep, deduction phase-outs, and lost credits.
• A 529 plan is strictly better for tax purposes if the money is earmarked for education; a UGMA/UTMA offers unrestricted use at the cost of annual kiddie tax liability.

The Short Answer: Yes, Custodial Accounts Are Taxable

Custodial accounts, UGMA (Uniform Gifts to Minors Act) and UTMA (Uniform Transfers to Minors Act), are not tax shelters. The IRS considers the minor child the legal owner of the account, so every dollar of interest, dividend income, and realized capital gain is taxable in the year it is received (Investopedia, 2026).

There is no deferral, no tax-free withdrawal window, and no deduction for contributions. The only tax mechanism that softens the blow is the kiddie tax, which creates a small tax-free floor before the parent's marginal rate kicks in.

This distinguishes custodial accounts sharply from 529 plans, Coverdell ESAs, and custodial Roth IRAs. A UGMA has no tax benefits compared to a 529 plan (Investopedia, 2026). The account's purpose is legal simplicity, transferring assets to a minor without establishing a trust, not tax minimization.

If you opened a custodial brokerage account for your child and the portfolio generated dividends or the custodian sold shares at a gain, tax is owed that year. Unrealized gains sitting in the account are not taxed until sold, the trigger is realization, not account existence.

Comprendre les règles fiscales est essentiel pour quiconque se demande qui paie les impôts sur un compte de garde.

What makes a custodial account taxable?

Three things trigger tax in a custodial account:

• Dividends: both qualified and ordinary dividends are reportable income. Qualified dividends may be taxed at 0% at the child's rate if the child's total income stays low.
• Interest: bond interest, money market fund yields, and savings account interest inside the custodial account are ordinary income, taxed at the child's marginal rate (typically 10% for the second tier).
• Realized capital gains: when the custodian sells a stock, ETF, mutual fund, or digital asset held in the account, the gain is taxable. The holding period determines whether it is short-term (taxed as ordinary income) or long-term (potentially 0% at the child's bracket).

Unrealized appreciation, paper gains on assets still held, does not create a tax event. That is worth knowing: a custodial account invested in a buy-and-hold growth strategy can compound for years with minimal annual tax drag if the custodian avoids frequent trading.

Income from digital assets held in a custodial account is also taxable. The IRS treats digital assets as property, not currency (IRS Digital Assets guidance, June 2026). If the custodian sells Bitcoin or a crypto ETF at a gain, that gain flows into the kiddie tax calculation the same way a stock sale would.

UGMA vs. UTMA: does the account type change the tax treatment?

No. The tax rules are identical for UGMA and UTMA accounts. Both are governed by the kiddie tax under IRC Section 1(g), and both treat the minor as the account owner for IRS purposes.

The difference between UGMA and UTMA is purely legal, not tax-related. A UGMA account can hold financial assets only: stocks, bonds, mutual funds, cash. A UTMA account can also hold physical assets, real estate, art, a car, but in practice, nearly all custodial brokerage accounts today are UTMA accounts because the UTMA has been adopted by every state except South Carolina.

For tax filing purposes, the acronym on the account statement does not change the calculation. The 2026 kiddie tax thresholds apply equally to both.

How the Kiddie Tax Works: 2026 Thresholds You Need to Know

The kiddie tax splits a child's unearned income into three tiers. For tax year 2026 (the return you file in early 2027), the thresholds are:

• Tier 1, $0 to $1,350: completely tax-free. No tax return is required if the child's unearned income stays below this ceiling and there is no other income.
• Tier 2, $1,351 to $2,700: taxed at the child's own marginal rate. For most children with no earned income, this means 10% on ordinary income (interest, non-qualified dividends, short-term gains) and potentially 0% on qualified dividends and long-term capital gains.
• Tier 3, above $2,700: taxed at the parent's marginal tax rate. This is the core of the kiddie tax, it prevents parents from shifting large investment portfolios into their child's name to exploit the child's low bracket.

These figures come from IRS Topic 553 (June 2026) and are confirmed by NerdWallet (October 2025, updated for 2026).

Tier 1, the $1,350 tax-free floor

The first $1,350 of a child's unearned income in 2026 is shielded from all federal income tax (IRS Topic 553, June 2026). This is an absolute zero, no tax liability, no filing requirement triggered by unearned income alone.

If a custodial account generates $900 in dividends and $300 in interest during the year, total unearned income is $1,200. That stays below the $1,350 threshold. The child owes nothing and, assuming no earned income, no return is required.

This floor also means that modest custodial accounts, a few thousand dollars invested in dividend-paying ETFs, often produce annual tax bills of zero. The tax problem only materializes when the account grows larger, the portfolio generates significant income, or the custodian realizes capital gains by actively trading.

Tier 2, taxed at the child's rate (next $1,350)

Unearned income between $1,351 and $2,700 falls into the child's own tax brackets. For 2026, the standard deduction for a dependent child with only unearned income is $1,350 (the Tier 1 floor). The next $1,350 is taxable but at the child's rate.

What is the child's rate? For ordinary income like bank interest and non-qualified dividends, the lowest federal bracket is 10%. For qualified dividends and long-term capital gains, the rate is 0% as long as the child's total taxable income stays below $48,350 (the 2026 threshold for the 0% long-term capital gains bracket for single filers).

In practice, a custodial account holding stocks for more than one year and generating qualified dividends can produce Tier 2 income that is still taxed at 0%. The real bite comes in Tier 3.

Tier 3, taxed at the parent's rate (above $2,700)

Every dollar of unearned income above $2,700 in 2026 is taxed at the parent's marginal federal rate (IRS Topic 553, June 2026). This is the anti-abuse mechanism: Congress does not want a parent in the 32% bracket to transfer a six-figure portfolio to a toddler and pay 10% on the dividends.

The parent's marginal rate for 2026 could be 10%, 12%, 22%, 24%, 32%, 35%, or 37%, depending on their taxable income. For a typical two-earner household with $120,000–$200,000 in taxable income, the parent's marginal rate is 22% or 24%. That means Tier 3 kiddie tax for those families costs 22 to 24 cents per dollar of unearned income above the $2,700 line.

The child's unearned income is not actually combined with the parent's return for this calculation unless the parent elects Form 8814. The rate is applied on the child's separate return using a special computation.

Worked Example: What a $4,000 Earnings Year Actually Costs

Take a concrete case: a 12-year-old's UTMA brokerage account, funded years ago by grandparents, generates $4,000 in unearned income during 2026, a mix of qualified dividends ($2,200), ordinary interest ($800), and a long-term capital gain ($1,000) from the custodian rebalancing the portfolio. The parent's marginal federal rate is 22%.

Here is how the 2026 kiddie tax applies, dollar by dollar.

• First $1,350: tax-free. Zero.
• Next $1,350 (Tier 2): taxed at the child's rate. The $800 of ordinary interest falls here first and is taxed at 10% = $80. The remaining $550 is qualified dividends, taxed at 0% at the child's level. Tier 2 total: $80.
• Above $2,700 (Tier 3): $4,000 minus $2,700 = $1,300 remaining. This entire slice is taxed at the parent's 22% marginal rate. $1,300 × 22% = $286.

Total federal tax: $80 + $286 = $366.

A parent who assumed "kids don't pay taxes" would be blindsided by this bill. And $366 is the mild scenario, the parent is in the 22% bracket. At 32% or 35%, the Tier 3 charge jumps sharply.

Step-by-step tax calculation on $4,000 of unearned income

To replicate this calculation for your own situation:

1. Add up all unearned income: interest (1099-INT), dividends (1099-DIV), and realized capital gains (1099-B from the custodian's sales).
2. Subtract the $1,350 tax-free floor to find the taxable unearned income.
3. Subtract another $1,350 to isolate the Tier 3 amount, the portion taxed at your marginal rate.
4. Apply the child's rate (10% for ordinary income, 0% or 15% for capital gains depending on amount) to the Tier 2 slice.
5. Apply your own marginal rate to the Tier 3 slice.
6. Sum the two tax amounts.

In our example: $4,000 − $1,350 = $2,650 taxable. $1,350 of that is Tier 2. The overflow into Tier 3 is $1,300 ($2,650 minus $1,350).

What the parent's 22% bracket means in dollars

A parent in the 22% bracket pays $220 in federal tax for every $1,000 of the child's Tier 3 unearned income. That is more than double what the same income would cost at the child's 10% rate.

This is why the kiddie tax exists and why the Form 8814 election can be costly. If the parent's bracket is 32% or 35%, the Tier 3 tax drag becomes a serious planning consideration. Some families deliberately keep custodial account income below $2,700 per year by favoring growth stocks that pay no dividends and minimizing realized gains, effectively managing the account to stay within Tiers 1 and 2.

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

The IRS considers the minor child the taxpayer, but a 10-year-old does not file their own 1040. The parent or legal guardian handles the mechanics. There are two filing paths, and choosing the wrong one can cost real money.

Path A: the child files their own return. If the child's unearned income exceeds $1,350 in 2026, they must file Form 1040. The parent prepares it, signs it on the child's behalf, and computes the kiddie tax on Form 8615 (Tax for Certain Children Who Have Unearned Income). The tax owed is paid from the child's assets, not the parent's pocket. This path keeps the child's income entirely off the parent's return, preserving the parent's adjusted gross income (AGI) for deduction and credit eligibility.

Path B: the parent elects Form 8814. IRS Form 8814 allows a parent to report a child's interest, dividends, and capital gains distributions directly on the parent's own return, so the child does not have to file (IRS, March 2026). The conditions: the child's income must be under $13,500 for 2026, it must consist only of interest, dividends, and capital gains distributions (not other types of income), and no estimated tax payments were made in the child's name.

When the child must file their own return

A child must file their own Form 1040 in 2026 if:

• Unearned income (interest, dividends, capital gains) exceeds $1,350, or
• Earned income (W-2 wages, self-employment) exceeds $15,000, or
• Gross income exceeds the larger of $1,350 or earned income plus $450, up to the $15,000 standard deduction limit.

For the typical custodial account scenario, a child with no job but a brokerage account generating dividends, the $1,350 threshold is the trigger. Below that, no return is required for the child. Between $1,350 and $13,500, the parent may choose between Path A (child files) and Path B (Form 8814). Above $13,500 in unearned income, Path A is mandatory.

Form 8814: the parent's election, and when it backfires

This is the trap that most "kiddie tax explained" articles skip.

Form 8814 appears convenient. It eliminates a separate child return and rolls the child's income into the parent's 1040. But the mechanics are blunt: the first $1,350 is excluded, the next $1,350 is taxed at 10% on the parent's return via a separate calculation, and everything above $2,700 is added directly to the parent's taxable income at their marginal rate.

Now consider a parent with $190,000 in taxable income, squarely in the 24% bracket and approaching the $200,000 threshold where the $2,000 Child Tax Credit begins to phase out ($50 per $1,000 of AGI above $200,000 for single filers, $400,000 for joint filers). Adding $3,000 of the child's Tier 3 income via Form 8814 could cost $720 in additional income tax (24% × $3,000) plus trigger a partial Child Tax Credit reduction. Filing the child separately avoids both hits.

The takeaway: Form 8814 is optimal only when the parent's marginal rate is low (10% or 12%) and the child's income is modest. For parents in the 22% bracket or above with more than a trivial amount of Tier 3 income, who is responsible for paying taxes in a custodial account often boils down to "the child files separately because it costs the family less."

Contributions vs. Earnings: What Is and Isn't Taxed

A frequent source of confusion: parents and grandparents worry that putting money into a custodial account triggers a tax bill. It does not.

Contributions to a UGMA or UTMA account are NOT taxed as income to either the donor or the child. These transfers fall under gift tax rules, not income tax rules (NerdWallet, May 2026). The annual gift tax exclusion for 2026 is $19,000 per donor per recipient ($38,000 for married couples splitting gifts). As long as contributions stay below that ceiling, no gift tax return (Form 709) is required and no tax is owed.

What IS taxed: the earnings generated inside the account. A contribution of $10,000 is invisible to the IRS. But if that $10,000 is invested and produces $400 in dividends, those $400 are unearned income subject to the kiddie tax tiers described above.

The distinction matters for planning. A grandparent can fund a custodial account generously up to the annual exclusion without creating a tax event for anyone. The tax conversation starts only when the assets begin producing income or the custodian sells at a gain.

Gift tax rules and the annual exclusion

Custodial accounts are governed by gift tax rules. Transfers to a UGMA/UTMA are irrevocable gifts to the minor, the donor cannot take the money back. This irrevocability is what makes the contribution a completed gift for tax purposes.

• Annual exclusion per donor per child: $19,000 in 2026.
• Lifetime gift and estate tax exemption: $13.99 million per individual in 2026 (IRS, adjusted annually for inflation).
• Contributions exceeding $19,000 from a single donor in a year require filing Form 709 but rarely trigger actual gift tax because the excess counts against the lifetime exemption.

The gift tax framework does not affect the child's income tax return. Contributions are invisible on Form 1040. Only earnings are reported.

Realized gains when the custodian sells assets

The custodian controls buying and selling inside the account until the child reaches the age of majority (typically 18 or 21, depending on state law). Every sale that produces a gain is a taxable event for the child in that tax year.

This creates a tension in custodial account management. The custodian may want to rebalance, take profits, or exit a concentrated position. Each trade generates a 1099-B and feeds the kiddie tax calculation. A custodial account churned aggressively can produce five-figure tax bills for a child with no other income, all taxed at the parent's marginal rate on the Tier 3 overflow.

Understanding custodial account tax rules means recognizing that the custodian's trading activity directly controls the annual tax drag. A buy-and-hold strategy minimizes it. Frequent rebalancing or tactical selling maximizes it.

Custodial Accounts vs. 529 Plans: The Tax Trade-Off

If the money is earmarked for education, a 529 plan beats a UGMA/UTMA on taxes by a wide margin. 529 account earnings are not taxable if the money is used for qualified education expenses (NerdWallet, October 2025). Contributions grow tax-free, and qualified withdrawals incur zero federal tax, no kiddie tax, no annual drag, nothing.

A UGMA/UTMA offers the opposite: no tax shelter, but no use restriction. When the child reaches the age of majority, the assets are theirs to spend on anything, a car, a down payment, starting a business, traveling. A 529 plan penalizes non-education use with a 10% penalty on earnings plus ordinary income tax on the earnings portion of the withdrawal (NerdWallet, October 2025).

This is not a "which is better" question. It is a "what are you saving for" question.

Some families use both vehicles: a 529 for dedicated college funding and a smaller UGMA/UTMA as a flexible future fund. The tax cost of the custodial account is the price of unrestricted optionality.

Below: the tax profiles side by side.

529 plan tax advantages at a glance

A 529 plan offers three structural tax advantages that a UGMA/UTMA cannot match:

1. Tax-free growth: dividends, interest, and capital gains compound inside the plan without annual tax liability.
2. Tax-free qualified withdrawals: tuition, fees, books, room and board, all withdrawn free of federal tax.
3. State tax benefits: over 30 states offer deductions or credits for 529 contributions (state-specific, verify with your state's plan).

The trade cost: if the beneficiary does not attend college or receives a scholarship, non-qualified withdrawals trigger the 10% penalty on the earnings portion only, not the contribution basis. The account can also be transferred to another family member (sibling, cousin, even the parent for their own education) without tax consequences.

Why some families still choose UGMA/UTMA despite the tax drag

Three reasons custodial accounts survive despite their tax disadvantages:

• No use restriction: funds can pay for a first car, study abroad not covered by 529 rules, gap-year travel, or a startup seed investment.
• No contribution limit: 529 plans have aggregate limits (often $300,000–$500,000 per beneficiary depending on the state). UGMA/UTMA accounts have none beyond the gift tax annual exclusion.
• Simplicity: opening a custodial brokerage account at Fidelity, Schwab, or Vanguard takes minutes. A 529 requires selecting a state plan and understanding its investment options.

Families in lower tax brackets (10% or 12% marginal rate) face a smaller kiddie tax penalty on Tier 3 income, sometimes small enough that the flexibility premium is worth it.

Key Steps to Stay Compliant in 2026

Staying compliant with custodial account taxes is straightforward if you track income during the year and make an informed filing choice before April 15, 2027. Here is a practical sequence:

1. Total up unearned income in January 2027: gather the 1099-INT, 1099-DIV, and 1099-B forms issued for the custodial account. Sum interest, ordinary dividends, qualified dividends, and realized capital gains.
2. Check against the $2,700 line: if total unearned income exceeds $2,700, the kiddie tax at the parent's rate applies to the excess. If it stays below $1,350, no return is required for unearned income alone.
3. Determine your marginal rate: pull your own taxable income from your draft 1040. Identify the bracket. This number drives the Tier 3 cost.
4. Model both filing paths: compute the tax under Path A (child files separately) and Path B (Form 8814 parent election). Compare. If Path B pushes your AGI into a phase-out zone for the Child Tax Credit, student loan interest deduction, or IRA deductibility, Path A likely wins.
5. File Form 8615 if the child files separately: this is the form that applies the kiddie tax computation on the child's own return. It references the parent's taxable income to determine the Tier 3 rate.

Sources

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

The information provided here is general in nature and is not a substitute for advice from a licensed financial advisor. Review your situation with a professional before committing.