A person claimed as someone else’s dependent has to file a federal tax return once their income crosses one of three lines. For tax year 2026, the dependent filing requirements are $16,100 in earned income, $1,350 in unearned income, or $400 in net self-employment earnings. Below those numbers, most dependents owe nothing and can skip filing. Above them, the IRS expects a return, and a separate set of rules called the kiddie tax can push a child’s investment income into a parent’s higher tax bracket.
Income Thresholds That Trigger a Return
Federal law requires anyone whose gross income exceeds their allowable standard deduction to file.1Office of the Law Revision Counsel. 26 USC 6012 – Persons Required to Make Returns of Income Dependents can’t claim the full standard deduction other single filers get, so their filing triggers start at lower levels. The dependent’s standard deduction is capped at the greater of $1,350 or earned income plus $450, up to a maximum of $16,100 for 2026.2Office of the Law Revision Counsel. 26 USC 63 – Taxable Income Defined That formula produces three distinct thresholds, one for each type of income.
Earned Income
Earned income means wages, salary, and tips from a job. A dependent must file if earned income tops $16,100 for 2026, which matches the single standard deduction.3Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A teenager earning under that amount from a summer or part-time job usually doesn’t need to file. Filing anyway can still make sense if any federal income tax was withheld.
Unearned Income
Unearned income covers interest, dividends, capital gains, and other investment earnings. The trigger is much lower here: $1,350 for 2026.4Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information A savings account or custodial brokerage account that generates more than $1,350 in a year means the dependent owes a return, even with no job income at all.
Combined Earned and Unearned Income
When a dependent has both job income and investment income in the same year, a return is required if gross income exceeds the larger of $1,350 or earned income (up to $15,650) plus $450.4Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information Take a dependent who earned $4,000 from a job and $900 in dividends. Their gross income is $4,900. Their threshold is $4,000 plus $450, or $4,450. Because $4,900 exceeds $4,450, a return is required.
Blind or Elderly Dependents
Dependents who are 65 or older or legally blind get an additional standard deduction on top of the normal cap, which raises the filing threshold. For 2025, the additional amount was $1,600 for a married dependent and $2,000 for an unmarried dependent.5Internal Revenue Service. Topic No. 551, Standard Deduction The 2026 figure will be slightly higher after inflation adjustments. An unmarried blind dependent can earn roughly $2,000 more in unearned income than a sighted dependent of the same age before triggering a filing requirement.
Self-Employment Income Uses a Lower Threshold
A dependent who earns money through freelance work, gig apps, lawn care, tutoring, or any independent contractor arrangement runs into a separate and much lower threshold: $400 in net self-employment earnings.6Internal Revenue Service. Instructions for Schedule SE (Form 1040) This threshold applies because self-employment income triggers Social Security and Medicare taxes, not just income tax. The IRS applies this rule regardless of age or dependency status.
The self-employment tax rate is 15.3%, covering both halves of Social Security (12.4%) and Medicare (2.9%).7Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) A 16-year-old who makes $500 mowing lawns owes roughly $71 in self-employment tax even though the income is far too low to owe income tax. This catches many families off guard, especially when a teenager starts picking up freelance work and no one withholds anything from the payments. Self-employment income is reported on Schedule SE, filed alongside Form 1040.
How the Kiddie Tax Works
The kiddie tax is where families with investment accounts in a child’s name run into the biggest surprise. It applies to dependents under 19, or full-time students under 24, who don’t provide more than half of their own support. Congress created the rule to stop parents from shifting investment assets into a child’s name to exploit the child’s lower tax bracket.
For 2026, the kiddie tax splits a dependent’s unearned income into three tiers:
- First $1,350: tax-free, offset by the dependent’s standard deduction.
- Next $1,350: taxed at the child’s own rate, which for most dependents is the 10% bracket.
- Above $2,700: taxed at the parent’s marginal rate, as if the parent had earned it directly.8Internal Revenue Service. Topic No. 553, Tax on a Child’s Investment and Other Unearned Income
The third tier is where the real cost lands. A custodial account throwing off $10,000 in capital gains means $7,300 of it gets taxed at the parent’s rate. For a parent in the 32% bracket, the tax on that excess comes to about $2,336, compared to roughly $730 if the child’s own rate applied. The calculation runs on Form 8615, which adds the child’s net unearned income to the parent’s taxable income, computes the additional tax, and assigns it back to the child’s return.9Internal Revenue Service. Instructions for Form 8615
Net unearned income is total unearned income minus the $2,700 already covered by the first two tiers. The kiddie tax stops applying once the individual either ages out (turning 19, or 24 for full-time students) or starts providing more than half of their own financial support.
Reporting a Child’s Income on the Parent’s Return Instead
Parents can skip the child’s separate return by using Form 8814 to fold the child’s income into their own Form 1040. The child must meet every condition on a strict checklist: only interest and dividends (including capital gain distributions), gross income under $13,500, a filing requirement but no estimated tax payments made, and no federal income tax withheld.10Internal Revenue Service. Instructions for Form 8814 The child must also be under 19, or a full-time student under 24.
The election simplifies paperwork but usually raises the family’s total tax bill. When you roll the child’s income onto your return, the first $1,350 that would have been tax-free on the child’s own return gets taxed at your rate instead. The next $1,350 is taxed at a flat 10%, and everything above $2,700 at your marginal rate. Families with modest amounts in a child’s account often save more by filing a separate return for the child. Run the numbers both ways before choosing convenience over cost.
When Filing Pays Off Even If Not Required
Plenty of dependents fall below every threshold but should file anyway. The most common reason is a refund of federal income tax the employer withheld. If a teenager earned $3,000 from a part-time job and the employer withheld $200 in federal tax, that dependent owes nothing (well under the $16,100 line) and can get the full $200 back by filing. Skipping the return forfeits that money to the IRS permanently.
Filing is also required to claim any refundable credit. Most dependents won’t qualify for the Earned Income Tax Credit because a parent claims them, but certain education-related credits can still apply to dependents with enough earned income. If anything was withheld or a refundable credit might apply, file.
Estimated Tax Payments for Larger Accounts
Dependents with sizeable unearned income or a growing freelance income stream that isn’t subject to withholding may need to make quarterly estimated tax payments. The rule matches everyone else’s: if you expect to owe $1,000 or more in tax after withholding and refundable credits, quarterly payments are required.11Internal Revenue Service. 2026 Form 1040-ES, Estimated Tax for Individuals Missing these payments can trigger an underpayment penalty on top of the tax itself. The quarterly deadlines are April 15, June 15, September 15, and January 15 of the following year. Form 1040-ES handles the calculation and payment.
Late-Filing Penalties
Age doesn’t soften the consequences of missing a filing deadline. The failure-to-file penalty is 5% of unpaid tax for each month the return is late, capped at 25%.12Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax A separate failure-to-pay penalty adds 0.5% per month on any balance due, also capping at 25%. When both apply in the same month, the failure-to-file penalty drops to 4.5% so the combined monthly charge stays at 5%.
Interest compounds on top of the penalties. The IRS adjusts its underpayment interest rate quarterly; for 2026 it has ranged from 7% in the first quarter to 6% in the second.13Internal Revenue Service. Quarterly Interest Rates Small dependent returns don’t rack up enormous penalties, but the charges still accumulate if left unaddressed for years. Parents sometimes assume a child’s return doesn’t matter because the numbers are small. The IRS does not share that assumption.