Form 8615: Kiddie Tax for H-1B Visa Holders
The "kiddie tax" rules require certain unearned income of children under 19 (or full-time students under 24) to be taxed at the parent's marginal tax rate. Form 8615 computes this tax. This guide explains when the kiddie tax applies to H-1B families and how it affects investment accounts held in children's names.
What Is the Kiddie Tax?
The kiddie tax under IRC Section 1(g) was enacted to prevent parents from shifting investment income to their children to take advantage of lower tax brackets. Under the kiddie tax rules, a child's unearned income above a threshold ($2,600 for TY2025) is taxed at the parent's marginal rate rather than the child's rate.
"Unearned income" includes interest, dividends, capital gains, rents, and royalties. Earned income (wages from a job) is not subject to the kiddie tax.
Who Is Subject to the Kiddie Tax?
The kiddie tax applies to a child who:
- Is under age 19 at the end of the tax year, OR under age 24 and a full-time student.
- Has unearned income exceeding $2,600 (TY2025).
- Does not file a joint return with a spouse.
- Has at least one living parent at the end of the tax year.
- Did not provide more than half of their own support from earned income.
H-1B family scenario
How the Kiddie Tax Is Calculated
| Unearned Income Tier | Tax Treatment |
|---|---|
| First $1,300 | Tax-free (offset by standard deduction) |
| Next $1,300 ($1,301-$2,600) | Taxed at child's rate (10%) |
| Above $2,600 | Taxed at parent's marginal rate |
Form 8615 performs the calculation by adding the child's unearned income above $2,600 to the parent's taxable income, computing the incremental tax, and allocating that tax back to the child's return.
Key Lines on Form 8615
- Line 1: Child's unearned income.
- Line 2: $2,600 threshold (TY2025).
- Line 3: Excess unearned income subject to kiddie tax (line 1 minus line 2).
- Line 5: Parent's taxable income (from the parent's Form 1040).
- Line 7: Tax on combined income at parent's rates.
- Line 9: Kiddie tax amount — the incremental tax from adding the child's income to the parent's return.
Alternatives to Avoid the Kiddie Tax
- 529 plans: Investment growth in 529 education savings plans is tax-free when used for qualified education expenses — not subject to kiddie tax.
- Roth IRA for the child: If the child has earned income (from a part-time job), they can contribute to a Roth IRA where growth is tax-free.
- Keep UTMA investments in growth stocks: Unrealized capital gains are not taxed, so keeping investments in growth-oriented (low-dividend) stocks can delay triggering the kiddie tax.
Related Resources
- Child Tax Credit vs ODC for ITIN Dependents
- Kiddie Tax Overview for H-1B Families
- Form 1040 for H-1B Visa Holders
Frequently Asked Questions
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H1B TaxFile Team
Written by the H1B TaxFile editorial team — tax professionals and software engineers who specialize in U.S. federal tax filing for H-1B visa holders, F-1 students, and nonresident aliens.
Reviewed by a licensed CPA with international tax experience.
Disclaimer: This guide is for educational purposes only and does not constitute tax or legal advice. Tax laws are complex and change frequently. Consult a qualified tax professional for advice specific to your situation.