Your teen's first tax return: when kids have to file, and why they often should anyway

A teenager with a summer job usually doesn't have to file a tax return. But 'doesn't have to' and 'shouldn't' are different things: if any federal income tax was withheld from their paychecks — and it almost always is — the only way to get that money back is to file. A first tax return at 16 or 17 is typically a 20-minute exercise on free software that ends with a refund check. It's also one of the best low-stakes financial lessons available.

When a teen actually has to file

• Earned income (wages from a job) above the standard deduction for dependents — $14,600 for 2024 — triggers a filing requirement. Most teens with part-time jobs come nowhere near this.
• Unearned income (interest, dividends, investment gains) above $1,300 triggers a requirement even at low levels — this catches kids with custodial investment accounts.
• Self-employment earnings of $400 or more — babysitting, mowing lawns, reselling sneakers, Twitch revenue — require a return regardless of how small the total looks. More on this below.
• If none of those apply, filing is optional. But optional isn't the same as pointless.

The standard deduction: why most teens owe nothing

A dependent's standard deduction covers their earned income up to the regular standard deduction amount ($14,600 for 2024). In plain English: a teen can earn up to that much in wages and owe exactly zero federal income tax. Social Security and Medicare taxes still come out of every paycheck and are never refunded — but the federal income tax line is where the recoverable money hides.

The $400 self-employment trap

Gig money plays by harsher rules. Wages have Social Security and Medicare taken out automatically, but a kid earning cash or app-based income is self-employed — and once net self-employment earnings hit $400, they must file and pay self-employment tax of about 15.3% on those earnings. A teen who nets $2,000 mowing lawns owes roughly $280 in self-employment tax even though they owe zero income tax. This surprises families every spring. Track expenses (mower gas, equipment, supplies) because they reduce the net number the tax is calculated on.

Stopping the over-withholding next year

If a teen is certain they'll earn under the standard deduction and had no tax liability last year, they can write 'Exempt' on their W-4, and the employer will stop withholding federal income tax entirely — no over-withholding, no waiting for a refund. It must be renewed each year, and it only applies to federal income tax; Social Security and Medicare still come out no matter what. If there's any chance their income will climb past the threshold (a big promotion to full-time summer hours, say), skip the exempt claim and just file for the refund instead.

The Roth IRA paper trail

There's a quieter reason to file: documentation. Roth IRA contributions require earned income, and for W-2 teens the proof is automatic. But for babysitting, lawn care, and other cash work, a filed tax return reporting that income is the gold-standard record that the earnings were real. A teen who reports $2,500 of self-employment income can have $2,500 contributed to a custodial Roth IRA — by them or by a generous parent — with a clean paper trail if the IRS ever asks. Unreported cash income, by contrast, technically can't back a Roth contribution at all.

A checklist for the first filing

1. Collect every W-2 (employers must send them by January 31) and any 1099s from gig platforms or banks.
2. Confirm whether the teen is claimed as a dependent on the parents' return — they almost certainly are, and they must check the 'someone can claim me' box.
3. Use free filing software; a teen return is the simplest return that exists.
4. Report all self-employment income of $400+ on Schedule C, with expenses.
5. Set the refund to direct deposit into the teen's own account — and have a conversation about where it goes (a Roth contribution is a strong answer).
6. Save a PDF copy of the return. It's the earned-income record for Roth purposes.

Does your teen need to file? The quick reference

Print the table, or at least remember its shape: wages under the standard deduction mean filing is voluntary but usually profitable, gig income past $400 makes filing mandatory whatever the income tax math says, and investment income has its own separate trapdoor. Ten seconds against this grid answers the question that stalls most families every February — and either way, the 20-minute return is worth doing for the refund, the practice, or the Roth paper trail.

The bottom line

Most working teens owe nothing, many are owed a refund, and gig earners past $400 owe a little whether they realize it or not. File the simple return, claim the withheld money, keep the paper trail for the Roth, and let a 16-year-old learn on a two-form return what most people first confront at 25 with a shoebox of documents and a deadline.