Student side income: a tax return is required at $400 of profit

The number that decides whether a side business becomes a tax filing obligation is $400. The IRS page on managing taxes for gig work puts it plainly: "You must file a tax return if you have net earnings from self-employment of $400 or more from gig work, even if it's a side job, part-time or temporary." That sits well below the $2,000 and $20,000 reporting thresholds that decide whether any tax form arrives, and it covers tutoring, resale, freelance design, lawn care and anything else done for money outside a payroll job.

The filing trigger is $400 of profit, not total sales

"Net earnings" means what is left after business expenses, so the test runs on profit rather than on total money received. For example, a student paid for a season of photo shoots who spends most of that money on lens rentals, prints and travel can end up under the line, while the same bookings with almost no expenses end up over it. Track expenses as carefully as income, because the expense side is what moves the activity across the threshold.

Whether the activity counts as a business is a separate question. IRS Tax Tip 2026-45, published on June 2, 2026, lists the factors for deciding between a hobby and a business. Among them: "Is there an intent to make a profit?", "Is the activity carried out like a business with complete and accurate books and records kept?" and "Are operations adjusted to improve profitability?" It adds that "No single thing is the deciding factor." Keeping real books is one of the few factors a student fully controls, so start a ledger in month one.

Fewer 1099 forms in 2026 does not mean less tax is owed

Two reporting thresholds changed, and both cut the odds a student receives any form. The IRS instructions for Forms 1099-MISC and 1099-NEC, in the December 2026 revision used for 2026 payments, say to file Form 1099-NEC "for each person in the course of your business during the year to whom you have paid at least $2,000 in" categories that begin with "Services performed by someone who is not your employee." A client who pays a freelancer less than that over the year sends nothing.

Payment apps work on a different threshold. The IRS page on understanding your Form 1099-K says third party settlement organizations such as payment apps and online marketplaces must report "when the total amount of payments you receive for goods or services through the platform exceeds $20,000 in more than 200 transactions." Almost no student business clears that.

None of that changes what is taxable. The same page states: "No matter the amount of reported payments, if you receive payments for selling goods or services, you must report all income on your tax return." The gig work page says the same about cash: "You must report all income on your tax return, even if you don't receive Forms 1099 from the businesses that pay you." The forms let the IRS cross-check returns; they do not define income, so your own records are the only complete source.

Income tax and self-employment tax are two separate bills

The first bill is ordinary income tax, and many student founders owe none of it. The IRS announced on October 9, 2025 that the standard deduction for single filers rises to "$16,100 for tax year 2026," and a side business plus a campus job often totals less than that.

Students claimed as a dependent on a parent's return get a smaller deduction. The IRS page on the standard deduction, last updated on September 24, 2026, still states the limit in 2025 terms: a dependent's standard deduction for 2025 "is limited to the greater of: (1) $1,350, or (2) your earned income plus $450 (but the total can't be more than the basic standard deduction for your filing status)." That floor is adjusted annually, so check the current figure.

The second bill has no standard deduction behind it. The IRS puts the self-employment tax rate at 15.3%, and Topic 554 breaks it down: "This rate consists of 12.4% for Social Security and 2.9% for Medicare taxes." It starts at the same threshold: "You usually must pay self-employment tax if you had net earnings from self-employment of $400 or more." There is one offset: when figuring adjusted gross income, "you can deduct one-half of the self-employment tax." Setting aside 15.3% of every dollar of profit as it comes in covers the self-employment piece, with income tax on top if total income clears your standard deduction.

What to track from the first dollar

The IRS instruction for gig and side workers is short: "Collect and keep your records and receipts during the year. Recordkeeping can help you track your income, deduct expenses and complete your tax return." In practice that means four running lists:

• every payment received, with the date, who paid, the amount and the platform
• every expense, with a receipt and a one-line note on the business reason
• miles driven for the business, with the date and purpose of each trip
• a bank account used only for the business, which is not legally required of a sole proprietor but makes the other three lists almost automatic

Mileage needs dates, not just a yearly total, because the rate moved mid-year. The IRS standard mileage rates page lists the 2026 business rate as 72.5 cents per mile from January 1 through June 30 and 76 cents from July 1 through December 31, after 70 cents for all of 2025.

When the money is due during the year

Side income has no employer withholding, so the IRS expects payments as the year goes. Its estimated taxes page says that "Individuals, including sole proprietors, partners, and S corporation shareholders, generally have to make estimated tax payments if they expect to owe tax of $1,000 or more when their return is filed," and that the amount is figured on "Form 1040-ES, Estimated Tax for Individuals."

The Taxpayer Advocate Service, an independent office inside the IRS, lists the 2026 payment dates as April 15, June 15, September 15 and January 15, 2027. The IRS page says taxes "must be paid as you earn or receive income during the year, either through withholding or estimated tax payments," so a student who also has a W-2 campus job can often raise withholding there instead of sending quarterly payments.

Structure, free help, and the financial aid effect

With no paperwork filed, a one-person business is a sole proprietorship by default. The SBA's page on choosing a business structure warns that in that form "your business assets and liabilities are not separate from your personal assets and liabilities. You can be held personally liable for the debts and obligations of the business." The SBA calls it a fit for "low-risk businesses and owners who want to test their business idea before forming a more formal business." An LLC, by contrast: "LLCs protect you from personal liability in most instances," though "members of an LLC are considered self-employed and must pay self-employment tax contributions towards Medicare and Social Security," so forming one does not reduce the 15.3%.

Do not pay for an employer identification number. The IRS page on getting an EIN says "You never have to pay a fee for an EIN" and that an approved online application is issued immediately. The page lists the situations that call for one: hiring employees, operating a partnership or corporation, paying sales and excise taxes, changing business structure or ownership, or administering certain trusts, retirement plans and estates. None describe a typical one-person side business. SBA resource partners including Small Business Development Centers, SCORE and Women's Business Centers offer what the agency calls "free or low-cost counseling and training."

One consequence reaches past taxes. The Federal Student Aid handbook for the 2026-2027 award year draws a student's "Net business profit or loss" from "IRS Form 1040 Schedule C: line 31," so aid calculations use profit after expenses rather than gross receipts.

All of the above is federal. State income tax, city or county business licenses, and sales tax on physical products are set separately, so a student selling goods across state lines has homework the federal rules do not cover. Once annual profit reaches a few thousand dollars, one paid session with a tax preparer or a free appointment at a local Small Business Development Center generally costs less than filing an amended return later.