To prove a child’s earned income to the IRS, you need a contemporaneous record that shows real work was done, at a fair rate, for identifiable clients or an employer, with payments you can trace. For a W-2 job, the form itself does most of the work. For babysitting, lawn care, tutoring, or a job in a parent’s business, the burden shifts to you: a dated ledger of tasks and pay, bank deposits or payment-app records that match, and a filed tax return reporting the same numbers. That is what proving earned income for a child looks like in practice, and it is what the IRS expects to see if it ever asks.1Internal Revenue Service. Recordkeeping – Section: What Should Be Included in the Taxpayer’s Books and Records?
What Counts as Earned Income
Earned income means wages, salaries, tips, and other employee compensation included in gross income, plus net earnings from self-employment.2Office of the Law Revision Counsel. 26 USC 32 – Earned Income – Section: Definitions and Special Rules For a minor, that usually falls into three categories: a regular job that produces a W-2, self-employment through neighborhood gigs like babysitting or lawn mowing, or paid work in a parent’s business.
Allowance, gifts from relatives, interest, and dividends do not count. Only earned income qualifies as taxable compensation for a Roth IRA contribution, which is why the distinction matters so much when the point of the paperwork is to support a custodial account.3Internal Revenue Service. Topic No. 309, Roth IRA Contributions
The Records That Prove It
The IRS does not require a specific form for informal work. It looks for a consistent trail created at the time the work happened, not reconstructed later. A notebook or a spreadsheet both work, provided the entries are specific and kept up.1Internal Revenue Service. Recordkeeping – Section: What Should Be Included in the Taxpayer’s Books and Records?
The Income Ledger
Each entry should capture:
- The date the work was performed.
- The name of the person or family who paid.
- What the child actually did, described concretely (mowed front and back lawn; watched two children for four hours; walked the dog twice).
- How long the work took.
- The exact amount received and how it was paid — cash, Venmo, Zelle, or check.
“Babysitting — $50” is not a record. “June 14 — watched the Martinez kids (ages 4 and 7) from 5pm to 10pm — $75 cash” is. Specificity is what separates a credible log from something that looks assembled the weekend before tax day.
Bank and Payment Records
Deposits that line up with the ledger convert a self-reported log into something much harder to dispute. A dedicated account for the child’s earnings makes this easier: each deposit matches an entry, and the two together tell one story. For app-based payments, save screenshots or transaction receipts showing the payer, amount, and date. For cash, deposit it promptly and note the deposit against the ledger entry.
Payment apps and online marketplaces only issue Form 1099-K when payments exceed $20,000 and 200 transactions in a year, so most children will never receive one.4Internal Revenue Service. IRS Issues FAQs on Form 1099-K Threshold Under the One, Big, Beautiful Bill – Dollar Limit Reverts to $20,000 Do not wait for a form that will not come; your records carry the proof.
W-2s and 1099s When They Apply
A child working as a traditional employee gets Form W-2 after year’s end reporting wages and any taxes withheld. A business that pays the child for contract work must issue Form 1099-NEC once payments hit the reporting threshold, which is $2,000 for the 2026 tax year under the One, Big, Beautiful Bill Act, up from $600.5Internal Revenue Service. Form 1099 NEC and Independent Contractors Payments under that threshold are still taxable and still count as earned income; the child just relies on the ledger and bank records to prove them.
Expense Receipts
If the child has business expenses (fuel for a mower, craft supplies, cleaning products), keep those receipts separate from income records. Expenses reduce net self-employment income, which changes the tax owed and the maximum Roth IRA contribution. A monthly folder or envelope prevents having to reconstruct costs at filing time.
When the Child Works for a Family Business
Paying a child through a parent’s business is a legitimate way to generate documented earned income, and it is also the arrangement the IRS scrutinizes most closely. Two conditions have to hold up.
First, the pay has to reflect what you would pay a non-family employee for the same work. If a local teenager doing data entry earns $15 an hour, paying your child $25 for the same task invites the IRS to treat the excess as a gift. Save comparable rate information to support the number you chose.
Second, the work has to be real and age-appropriate. A six-year-old cannot credibly earn $5,000 doing bookkeeping. A 14-year-old sorting inventory, shredding documents, or managing social media can. Document specific tasks, hours, and pay for each work session, the same way you would for an outside employee.
Payroll Tax Treatment
When a child under 18 works for a parent’s sole proprietorship, or a partnership in which both partners are the child’s parents, the wages are exempt from Social Security and Medicare taxes. The FUTA exemption runs through age 20. Those exemptions disappear if the business is a corporation or has a non-parent partner. Income tax withholding still applies, but a child earning below the standard deduction typically owes no income tax and can claim exempt on Form W-4.6Internal Revenue Service. Family Employees
Child Labor Rules
Under federal law, children under 16 can work any hours in a parent’s solely owned non-agricultural business, as long as the work is not in manufacturing, mining, or an occupation the Department of Labor has declared hazardous.7U.S. Department of Labor. Exemptions from Child Labor Rules in Non-Agriculture State law may add restrictions on hours and job types, so confirm your state’s rules before setting a schedule.
File a Tax Return to Lock the Income In
Even when no return is technically required, filing one creates an official record of the income. That is exactly what you want if the goal is proving earnings for a Roth IRA or defending the income later.
For a dependent in 2026, the standard deduction is the greater of $1,350 or earned income plus $450, capped at the full single-filer standard deduction of $16,100.8Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 A child who earns $3,000 babysitting has a standard deduction of $3,450 and likely owes no income tax. But self-employment plays by a different rule: if net earnings from self-employment top $400, a return is required regardless of total income, because self-employment tax applies on top of any income tax.9Internal Revenue Service. Check If You Need to File a Tax Return That tax runs 15.3% on 92.35% of net earnings.10Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
The child files Form 1040 under their own Social Security number. Wages go on the wages line; self-employment income gets reported on Schedule C, with Schedule SE calculating the self-employment tax when net profit exceeds $400.11Internal Revenue Service. About Form 1040, U.S. Individual Income Tax Return If the child is too young to sign, a parent signs the child’s name followed by “By [parent’s signature], parent for minor child.”12Internal Revenue Service. Publication 501, Dependents, Standard Deduction, and Filing Information
E-filing generates a confirmation receipt, usually within 48 hours.13Internal Revenue Service. Form 9325, Acknowledgement and General Information for Taxpayers Who File Returns Electronically Paper returns work too; send them certified mail with a return receipt so you have proof of the filing date.
Red Flags and Penalties
The IRS can question a child’s reported income at any point within the standard three-year audit window. The patterns that draw attention are predictable: pay above market rates, vague job descriptions, no contemporaneous records, and suspiciously round numbers that look invented after the fact.
If the IRS finds the income was overstated or fabricated, an accuracy-related penalty adds 20% to the underpaid tax, and a finding of civil fraud raises that to 75% of the underpayment.14Internal Revenue Service. 20.1.5 Return Related Penalties Excess Roth IRA contributions that are not corrected in time incur a 6% excise tax each year the money remains in the account.
The defense is unglamorous: specific entries written down when the work happens, deposits that match, market-rate pay you can point to, and a filed return that ties to the records. Families who reconstruct paperwork months later are the ones who lose the argument.