Whether you have to pay taxes under 18 depends on how much you earned and what kind of income it was, not on your age. For the 2026 tax year, a dependent minor generally has to file a federal return once wages top $16,100, investment income tops $1,350, or self-employment earnings reach $400. Filing is required at those points; actually owing tax is a separate question, and many working teens get every withheld dollar back when they file.
Income Amounts That Force a Minor to File
The IRS treats earned income (wages, tips, self-employment pay) differently from unearned income (interest, dividends, capital gains). For 2026, a dependent must file if any of these apply:
- Unearned income over $1,350
- Earned income over $16,100
- Gross income exceeding the greater of $1,350 or earned income (up to $15,650) plus $450
- Net self-employment earnings of $400 or more
The combined rule is the one families miss. Say a 17-year-old earns $4,000 at a summer job and picks up $500 in savings interest. Gross income is $4,500. The threshold is the greater of $1,350 or $4,450 ($4,000 + $450), so $4,450. Because $4,500 clears $4,450, a return is required.1Internal Revenue Service. Rev. Proc. 2025-32
How Much a Working Teen Can Earn Tax-Free
Having to file is not the same as having to pay. A dependent’s standard deduction for 2026 equals the greater of $1,350 or earned income plus $450, capped at the full single-filer deduction of $16,100.1Internal Revenue Service. Rev. Proc. 2025-32
The deduction grows with earnings. A teen making $8,000 gets a $8,450 standard deduction and owes zero income tax. A teen earning $20,000 claims the full $16,100 and pays income tax only on the remaining $3,900.2Internal Revenue Service. Topic No. 551, Standard Deduction
Unearned income is treated far less generously. A dependent with no job but $5,000 in dividends gets only the $1,350 minimum deduction and owes tax on $3,650.
The Kiddie Tax on Investment Income
The kiddie tax stops families from parking investments in a child’s name to use the child’s lower bracket. For 2026 it works in three tiers:
- First $1,350 of unearned income: tax-free
- Next $1,350: taxed at the child’s rate
- Above $2,700: taxed at the parent’s marginal rate
That top tier is the point. A parent in the 32% bracket who shifts $10,000 of dividend-paying investments to a child’s account saves nothing on anything above $2,700, because the IRS taxes it as if the parent still earned it.3Internal Revenue Service. Topic No. 553, Tax on a Childs Investment and Other Unearned Income
The rule reaches further than most people realize. It applies to children under 18, to 18-year-olds who don’t earn more than half their own support, and to full-time students ages 19 through 23 in the same situation.4Internal Revenue Service. Instructions for Form 8615
When unearned income tops $2,700, the child normally files a return with Form 8615 attached. If the child’s only income is interest, dividends, and capital gain distributions, and 2026 gross income falls between $1,350 and $13,500, a parent can instead report the child’s income on their own return using Form 8814 and skip a separate child return. The election can raise the total tax, though, so run it both ways before choosing.5Internal Revenue Service. Instructions for Form 8814
The $400 Self-Employment Trap
Self-employment is where young earners get surprised. A minor who nets $400 or more from freelancing, gig work, selling online, or any small side business must file a return, even if total income is far below the standard deduction.6Internal Revenue Service. Self-Employed Individuals Tax Center
The reason is self-employment tax: 15.3% to fund Social Security and Medicare, with no age exemption.7Social Security Administration. Contribution and Benefit Base A teen who clears $600 from a lawn-mowing business owes no income tax, but will still owe roughly $85 in self-employment tax.
If the Minor Works for a Parent’s Business
One exemption helps families: when a child under 18 works for a parent’s sole proprietorship, or for a partnership where both partners are the child’s parents, the wages are not subject to Social Security or Medicare tax.8Internal Revenue Service. Family Employees Income tax still applies if earnings exceed the standard deduction, but skipping the 7.65% FICA withholding adds up. The exemption does not apply if the parent’s business is a corporation or S-corp, and it ends when the child turns 18.9Office of the Law Revision Counsel. 26 U.S. Code 3121 – Definitions
Money That Doesn’t Count as Income
Plenty of what a minor receives isn’t income at all. Cash gifts from relatives, birthday money, and allowances aren’t taxable to the child and never create a filing requirement. In 2026, a giver can hand over up to $19,000 per recipient without gift tax consequences, and the recipient owes no income tax on the gift regardless of amount.10Internal Revenue Service. Whats New – Estate and Gift Tax
Personal Venmo or Cash App transfers between friends and family aren’t income either. Those platforms issue Form 1099-K for business transactions above $20,000 across more than 200 transactions, so a teen running a real sales operation through an app could get one.11Internal Revenue Service. Understanding Your Form 1099-K Getting a 1099-K doesn’t automatically mean tax is owed; it means the IRS has been told about the payments, and the income and expenses need to go on a return.
Who Signs the Return
When a minor is required to file but too young to handle it, the parent or guardian is responsible. If the child can’t sign, the parent signs the child’s name in the signature space and writes “By [parent’s signature], parent for minor child.”12Internal Revenue Service. Return Signature Older teens sign their own returns; parents don’t need to co-sign, but reviewing a first-time filer’s return is worthwhile.
Deadline and What Happens If You Miss It
A minor’s return follows the normal individual deadline. For the 2025 tax year, returns are due April 15, 2026.13Internal Revenue Service. IRS Opens 2026 Filing Season
Missing the deadline when tax is owed triggers two penalties. The failure-to-file penalty is 5% of unpaid tax per month (or partial month), up to 25%.14Internal Revenue Service. Topic No. 653, IRS Notices and Bills, Penalties and Interest Charges A failure-to-pay penalty adds 0.5% per month on the unpaid balance, also capped at 25%.15Internal Revenue Service. Failure to Pay Penalty For returns more than 60 days late, there’s a minimum late-filing penalty: $525 or 100% of the tax owed, whichever is less.
If no tax is owed, there is no penalty for filing late. That matters, because most working teens are in refund territory, not balance-due territory.
Why Filing Can Pay Even When It Isn’t Required
A minor whose income falls below every threshold can still benefit from filing. If an employer withheld federal income tax from paychecks, the only way to get that money back is to file a return and claim it.16Internal Revenue Service. Check if You Need to File a Tax Return For a teen earning under $16,100 at a part-time job, every withheld dollar should come back once the standard deduction wipes out the tax liability.
Filing also creates a documented record of earned income, which is what unlocks a custodial Roth IRA. A minor with earned income can contribute up to $7,500 for 2026, or the full amount earned that year, whichever is less. A 16-year-old who earned $3,000 can put up to $3,000 in. A parent or guardian opens and manages the account until the child reaches the age of majority under state law, when control transfers to the child. Contributions (not earnings) can come out at any time without penalty, which makes the long time horizon feel less like a lock-up.
Most working minors can file a straightforward Form 1040 with no itemizing, often through IRS Free File at no cost.