If your side hustle clears $400 in profit this year, you generally owe self-employment tax on it, even if no app ever sends you a tax form. That is the rule in plain English. The IRS requires self-employment tax when net earnings reach $400, at a rate of 15.3%. Many first-timers assume that no 1099 means no tax, and they find out otherwise in April.
The timing matters. It is November, the final 2026 estimated payment is due January 15, 2027, and you still have two months to buy deductible equipment or start tracking expenses properly. Here is what to do with the time left.
This is educational content, not financial advice. It covers US federal rules in general terms. State rules differ, so talk to a tax professional about your own situation.
What $3,000 of side income really costs in tax
Say you made $3,000 in profit after expenses, from freelancing or selling digital products. Self-employment tax is calculated on 92.35% of net earnings, as shown on Schedule SE:
- $3,000 × 92.35% = $2,770.50
- $2,770.50 × 15.3% = about $424 in self-employment tax
Then regular income tax applies on top. You do get to deduct the employer-equivalent part of the self-employment tax when figuring adjusted gross income, which softens the hit a little.
So how much should you set aside? Combining the two taxes before any state tax and before other deductions gives you a useful rough guide:
| Your federal income tax bracket | Approximate share of profit to set aside |
|---|---|
| 12% | About 25% |
| 22% | About 35% |
Those percentages are our own estimate, and other deductions may lower your actual bill. If your state has an income tax, add its rate. When in doubt, move 30% of every payment into a separate savings account the day it arrives. A high-yield savings or money market account will even pay you a little while the money waits.
Why “I didn’t get a 1099” is not a defense
The reporting rules loosened recently, which has confused many people. Those rules decide when a company has to file a form. They do not decide whether your income is taxable.
| Form | When it gets sent | Does it change what you owe? |
|---|---|---|
| 1099-K (apps and payment platforms) | Over $20,000 and more than 200 transactions | No |
| 1099-NEC (clients paying you directly) | $2,000 threshold for tax years after 2025, up from $600 | No |
Some states set lower 1099-K thresholds, and payment card transactions can follow different rules, so you may still get a form below those numbers. Either way, the IRS is explicit: gig income must be reported on your return even if it does not appear on a 1099 or any other information form. Our advice is simple: track every dollar as if the form were coming.
Do you have to pay before April?
Possibly. You generally must make estimated tax payments if you expect to owe $1,000 or more when you file. You usually avoid the underpayment penalty by paying at least 90% of this year’s tax or 100% of the tax shown on last year’s return, whichever is smaller. High earners face a higher prior-year figure, so check the IRS rules if your income is well into six figures.
The final payment for 2026 covers September through December and is due January 15, 2027.
If you also have a W-2 job, there is often an easier route. Giving your employer an updated Form W-4 with extra withholding can cover your side income without quarterly payments. It is a form you fill in once, and it suits people who hate tracking deadlines.
Five deductions to check before December 31
Because the $400 test applies to net earnings, every legitimate expense lowers both the income tax and the self-employment tax. Keep receipts for all of them.
- Platform fees. Fiverr’s 20%, Upwork’s service fee and Connects are costs of doing business. If you are choosing between them, see our Upwork vs Fiverr fee comparison.
- Software and AI subscriptions. If you pay for a chatbot or design tool for the business, the business-use share is generally deductible. Used half for personal things? Deduct only the business portion. Our guide to whether ChatGPT Plus is worth it can help you decide whether to keep paying.
- Mileage. The IRS rate for 2026 is 72.5 cents a mile before July 1 and 76 cents from July 1 to December 31. Personal commuting does not count, and you need a contemporaneous log, so start one today if you drive for work.
- Equipment. A laptop or microphone you use for the business can qualify, in proportion to business use. Do not buy something just for the write-off. A deduction returns only a fraction of what you spend.
- Home office. It requires space used regularly and exclusively for the business. The kitchen table does not qualify.
Can AI handle this for you?
Partly. A chatbot is useful for sorting a year’s expenses into categories, drafting a mileage log template, or explaining a line on Schedule C. We walk through a similar setup in our AI budget planner guide.
It should not be your tax advisor. Chatbots can state old thresholds with confidence, and these numbers changed recently. Check anything important on IRS.gov, and never paste your Social Security number or full bank statements into a public chat tool.
Who needs to act now, and who can relax
Act this month if:
- You have already cleared several thousand dollars and have not set anything aside.
- You expect to owe $1,000 or more and have no withholding to cover it.
- You have no record of your 2026 expenses.
You can relax a bit if:
- Your net profit is under $400. Note that you may still have to report the income and pay income tax on it, so keep records anyway.
- You already adjusted your W-4, or you have been saving 25% to 30% of each payment.
Our take
Taxes do not make a side hustle a bad idea, but they do change which ones are worth doing. A gig that pays $25 an hour is closer to $17 or $18 after setting aside for tax. Run that number before you say yes to a client or sign up for your next side hustle. The cheapest fix takes ten minutes: open a separate savings account today and send 30% of the next payment there.