If your dependent child worked this year, filing taxes for a dependent child who works means preparing a separate return in the child’s name — not adding their income to yours. For the 2025 tax year, a single dependent under 65 must file if earned income tops $15,750 or unearned income tops $1,350.1Internal Revenue Service. Check if You Need to File a Tax Return Below those numbers, filing is optional but often worth it to recover any federal tax the employer withheld.
Does Your Child Have to File?
The IRS splits a dependent’s income into earned (wages, salaries, tips) and unearned (interest, dividends, capital gains). For 2025, a single dependent under 65 must file if any of these apply:1Internal Revenue Service. Check if You Need to File a Tax Return
- Earned income was more than $15,750.
- Unearned income was more than $1,350.
- Gross income was more than the larger of $1,350 or earned income (up to $15,300) plus $450.
File anyway when the child is under the thresholds but had federal income tax withheld. A return is the only way to get that money back. A teenager who earned $3,000 over the summer and had $200 withheld leaves that $200 with the Treasury by not filing.
The Dependent Standard Deduction
A child claimed as someone else’s dependent does not get the full single-filer standard deduction. For 2025, the dependent’s standard deduction is the greater of $1,350 or earned income plus $450, capped at the regular single standard deduction of $15,750.2Internal Revenue Service. Topic No. 551, Standard Deduction
For most working teenagers this formula wipes the tax bill out. A child who earned $6,000 gets a $6,450 deduction ($6,000 + $450), which zeroes out taxable income. A child who earned only $800 still gets the $1,350 floor. The formula becomes limiting mainly when a dependent has significant unearned income, because interest and dividends do not add to the earned-income side of the calculation.
Preparing and Filing the Return
Gather every income document the child received before starting:
- Form W-2 from any employer, showing wages and tax withheld.3Internal Revenue Service. About Form W-2, Wage and Tax Statement
- Form 1099-INT or 1099-DIV from banks or brokerages for interest and dividends.
- Form 1099-NEC from any client who paid $600 or more for freelance work.
The child files Form 1040 using Single filing status. On the form, check the box indicating that someone else can claim the child as a dependent. That box tells the IRS to apply the limited dependent standard deduction rather than the full single amount. Enter the deduction using the formula above: earned income plus $450, or $1,350, whichever is larger.2Internal Revenue Service. Topic No. 551, Standard Deduction
If the child is too young to sign, a parent or guardian signs for them. Write the child’s name on the signature line, then “by,” your own name, and “parent” or “guardian.” E-filing processes refunds in a few weeks; paper returns take longer.
Set Up the Right Withholding on the W-4
When a child starts a job, the employer gives them a Form W-4. Many teenagers will owe no federal income tax because earnings fall below the standard deduction. A child who had no tax liability last year and expects none this year can check the “Exempt” box on the W-4 and skip federal income tax withholding altogether.4Internal Revenue Service. Form W-4, Employees Withholding Certificate
The exemption has to be renewed each year with a fresh W-4. If the child picks up a second job or starts earning investment income, update the form so they don’t get surprised with a balance due.
If Your Child Has Self-Employment Income
Babysitting, lawn care, freelance design, reselling online — all of it counts as self-employment. A client who paid $600 or more should send a Form 1099-NEC, but the income is reportable either way.
The child reports profit or loss on Schedule C attached to Form 1040. If net earnings after expenses come to $400 or more, the child owes self-employment tax at a combined Social Security and Medicare rate of 15.3%, calculated on Schedule SE.5Internal Revenue Service. Topic No. 554, Self-Employment Tax
This is where families get caught. A child with $2,000 in babysitting income may owe no income tax (the standard deduction covers it) yet still owe roughly $283 in self-employment tax. That amount is reported on the return separately from income tax.
A child expecting to owe $1,000 or more at filing should make quarterly estimated tax payments.6Internal Revenue Service. Estimated Taxes Payments are generally due April 15, June 15, and September 15 of the tax year, and January 15 of the following year. Missing an installment can trigger an underpayment penalty even when the full amount is paid at filing. Most teenagers with a modest gig won’t hit the $1,000 threshold; a profitable online business can.
Unearned Income and the Kiddie Tax
When a dependent child has unearned income above $2,700 for 2025, the excess is taxed at the parent’s marginal rate rather than the child’s.7Internal Revenue Service. Topic No. 553, Tax on a Childs Investment and Other Unearned Income (Kiddie Tax) The math has three tiers: the first $1,350 is sheltered by the standard deduction, the next $1,350 is taxed at the child’s own rate (typically 10%), and everything above $2,700 is taxed at the parent’s rate.
The Kiddie Tax reaches children under 18, 18-year-olds whose earned income doesn’t cover more than half of their own support, and full-time students aged 19 through 23 who meet that same support condition.8Internal Revenue Service. Instructions for Form 8615 (2025)
There are two ways to report it. The default is for the child to file Form 1040 with Form 8615 attached, which calculates the parent-rate portion.8Internal Revenue Service. Instructions for Form 8615 (2025) The shortcut: when the child’s only income is interest, dividends, and capital gain distributions, and gross income is under $13,500 for 2025, the parent can report it on their own return using Form 8814, and the child files nothing.9Internal Revenue Service. 2025 Instructions for Form 8814 – Parents Election to Report Childs Interest and Dividends The tradeoff is that the child’s income lands in the parent’s adjusted gross income, which can knock the parent off income-based credits or deductions. For a household near a phaseout, the child’s own return with Form 8615 often works out better.
Does the Child’s Return Affect Your Dependency Claim?
No — the two returns are independent, and the child filing does not disqualify you from claiming them. You keep the claim as long as four tests are met:10Internal Revenue Service. Dependents
- Relationship: your son, daughter, stepchild, foster child, sibling, or a descendant of any of these.
- Age: under 19 at year-end, or under 24 if a full-time student.
- Residency: lived with you more than half the year.
- Support: the child did not provide more than half of their own financial support.
The support test is where a working child creates real risk. Every dollar the child spends on their own clothing, car costs, entertainment, phone bill, and similar counts toward self-support. If the child earned $15,000 and spent most of it on themselves while your total contributions (housing, food, insurance, tuition) came in under that amount, you lose the claim. Tally both sides before filing. Publication 501 includes a support worksheet built for this.11Internal Revenue Service. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information
What Happens if the Return Is Late
When a dependent child is required to file and doesn’t, the IRS applies the same penalties as for any other missed return. The failure-to-file penalty is 5% of the unpaid tax for each month the return is late, up to 25%. Returns more than 60 days late carry a minimum penalty of $525 (for returns due after December 31, 2025) or 100% of the unpaid tax if that amount is smaller.12Internal Revenue Service. Failure to File Penalty A separate failure-to-pay penalty of 0.5% per month runs on any unpaid balance, with interest on top.13Internal Revenue Service. Failure to Pay Penalty
When the child is owed a refund — the most common situation — there is no late-filing penalty because no tax is owed. But the IRS won’t issue a refund on a return filed more than three years after the original due date. A child who had $300 withheld from a 2025 summer job has until April 2029 to claim it. After that, the money belongs to the Treasury. State rules are separate and may add their own filing requirements, deadlines, and penalties.