What Is Schedule C for 1099 Self-Employed Workers?

If you got a 1099 for freelance, contract, or gig work, Schedule C is where that money gets reported. You enter your gross receipts near the top, subtract your business expenses below, and the net profit or loss flows to your Form 1040 for income tax and to Schedule SE for self-employment tax. Schedule C for 1099 income is filed as part of your regular individual return, not as a separate filing, and you use it whether you received one 1099 or a dozen.

Which 1099s Belong on Schedule C

Three 1099 forms commonly report income that goes on Schedule C:

Form 1099-NEC reports nonemployee compensation. Box 1 is your starting point. For payments made in 2026, a payer only has to send a 1099-NEC if they paid you $2,000 or more, up from $600 in earlier years, and the threshold will adjust for inflation going forward.¹
Form 1099-MISC reports other business payments such as rents or prizes that don’t count as nonemployee compensation.
Form 1099-K reports payments run through third-party networks like credit card processors and payment apps. For 2026, a network files this form when your transactions exceed both $20,000 and 200 individual transactions in the year.

The higher 1099-NEC threshold does not change what you owe tax on. If a client paid you $1,500 in 2026 you won’t get a 1099-NEC, but that $1,500 still goes on Schedule C. Cash, personal checks, direct deposits from clients who didn’t send a form, and anything else you earned in the business all belong on Line 1.²

Who Files Schedule C

You file Schedule C if you operated a business or practiced a profession as a sole proprietor. That’s the default for anyone working for themselves who hasn’t formed an LLC taxed as a corporation, an S-corp, or a partnership.³ Freelancers, gig workers, and independent contractors are all in this group. Spouses running a business together can file as a qualified joint venture on Schedule C instead of filing a separate partnership return.²

Statutory employees — a narrow IRS classification that includes full-time life insurance salespeople and traveling salespeople — also use Schedule C. Their W-2 has the “Statutory employee” box checked, and their employers withhold Social Security and Medicare but not federal income tax.⁴

One boundary matters here. Schedule C is only for activities that qualify as a business, meaning your primary purpose is earning income or profit and you pursue it with some regularity.³ A hobby doesn’t qualify. Hobby income is still taxable, but you can’t deduct hobby expenses against it, so a 1099 for occasional side income you don’t treat as a business won’t produce the same result on your return.⁵

Your Social Security Number, or an Employer Identification Number if you have one. The EIN goes on Line D; don’t put your SSN there.

A six-digit business activity code from the North American Industry Classification System. The full list is in the Schedule C instructions.

Every 1099-NEC, 1099-MISC, and 1099-K you received, cross-checked against your own records.

Records of income no 1099 captured: cash, checks, and deposits from smaller clients.

Receipts, invoices, mileage logs, and bank statements supporting your deductions.

Keep these records at least three years after filing. Thorough recordkeeping also protects you from the 20 percent accuracy-related penalty under 26 U.S.C. § 6662 that applies to a substantial understatement of income.⁷

Filling Out the Form

Part I: Income

On Line 1, enter your gross receipts. That’s the total of everything the business earned before any expenses. Add your 1099 amounts and your untracked income together; the total should match what you actually collected. If you sell physical products, Part III on the second page calculates your cost of goods sold (materials, inventory, shipping), and that number reduces gross receipts to give you gross profit. Service-based businesses without inventory usually skip Part III.⁶

Part II: Expenses

Part II lists specific categories: advertising, insurance, office supplies, legal and professional services, travel, car and truck expenses, contract labor, rent, utilities, software, and more. To be deductible, an expense must be ordinary (common in your field) and necessary (helpful to the business).

For vehicle costs, you pick one of two methods: actual costs (gas, insurance, repairs, depreciation) or the IRS standard mileage rate. The 2026 business standard mileage rate is 72.5 cents per mile.⁸ Whichever method you use, keep a log showing the date, destination, business purpose, and miles for each trip.

Net Profit or Loss

Line 31 subtracts your total expenses from gross income and produces your net profit or loss. That number goes two places: Schedule 1 (Form 1040), Line 3, which feeds your adjusted gross income; and Schedule SE, Line 2, which feeds self-employment tax.² A loss may offset other income on your return.

Deductions That Sit Off Schedule C

Several deductions available to sole proprietors don’t appear on Schedule C itself but affect what you ultimately owe.

Home office. If part of your home is used regularly and exclusively for business, the simplified method lets you deduct $5 per square foot up to 300 square feet, a maximum of $1,500.⁹ The regular method uses actual expenses prorated by the share of your home devoted to business and often produces a larger deduction, with more paperwork.

Self-employed health insurance. If you pay your own premiums and aren’t eligible for coverage through a spouse’s employer plan, you can deduct premiums for yourself, your spouse, and your dependents. The deduction appears on Schedule 1 and is capped at your net profit from the business the plan is established under.¹⁰ Any month you were eligible for an employer-subsidized plan disqualifies that month’s premiums.

Half of self-employment tax. You can deduct 50 percent of your self-employment tax when computing adjusted gross income. It goes on Schedule 1 and reduces income tax, though not the self-employment tax itself.¹¹

Qualified business income. The QBI deduction under Section 199A lets eligible sole proprietors deduct up to 20 percent of their net business income.¹² The One Big Beautiful Bill Act made the deduction permanent and, starting in 2026, added a minimum deduction of $400 for taxpayers with at least $1,000 in qualifying business income. The full 20 percent is available without restriction if your total taxable income falls below roughly $201,750 for single filers and $403,500 for married couples filing jointly in 2026. Above those thresholds, wage and property limits may apply, and specified service businesses such as law, accounting, health care, consulting, athletics, and financial services face further restrictions that can eliminate the deduction at higher incomes.¹³

Self-Employment Tax on Your Net Profit

If your net earnings from self-employment are $400 or more, you owe self-employment tax on top of income tax. The rate is 15.3 percent: 12.4 percent for Social Security and 2.9 percent for Medicare.¹⁴ You calculate it on Schedule SE using the net profit from Schedule C.

The 12.4 percent Social Security portion only applies to earnings up to $184,500 in 2026.¹⁵ Earnings above that cap are still subject to the 2.9 percent Medicare portion, which has no upper limit. If your self-employment income exceeds $200,000 (or $250,000 for married couples filing jointly), an additional 0.9 percent Medicare tax applies to the amount above the threshold.

Quarterly Estimated Payments

No one is withholding tax from a 1099 payment, so you generally have to pay during the year in quarterly installments. You’re required to make estimated payments if you expect to owe $1,000 or more for the year after withholding and refundable credits.¹⁶

The 2026 quarterly due dates:

April 15, 2026, for income earned January through March
June 15, 2026, for income earned April through May
September 15, 2026, for income earned June through August
January 15, 2027, for income earned September through December

If a due date falls on a weekend or holiday, the deadline shifts to the next business day.¹⁷ You pay using Form 1040-ES through IRS Direct Pay or by mailing a voucher with a check.

To avoid an underpayment penalty, you generally need to pay at least 90 percent of the current year’s tax or 100 percent of the prior year’s tax, whichever is less. If your adjusted gross income exceeded $150,000 in the prior year ($75,000 if married filing separately), the prior-year safe harbor rises to 110 percent.¹⁸

Filing Deadline and Late Penalties

Schedule C is filed with your Form 1040. For the 2026 tax year, filed in 2027, the deadline is April 15, moving to the next business day if it falls on a weekend or holiday.¹⁹ You can request an automatic six-month extension with Form 4868, but that only extends the time to file. You still owe any tax by the original April deadline.

Filing late triggers a penalty of 5 percent of unpaid tax per month or partial month, up to 25 percent, plus a separate failure-to-pay penalty of 0.5 percent per month on the unpaid balance.²⁰ Missed quarterly payments are penalized using the IRS’s prevailing interest rate applied to the shortfall for the period it went unpaid.²¹

1
Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide
2
Internal Revenue Service. Instructions for Schedule C (Form 1040) (2025)
3
Internal Revenue Service. About Schedule C (Form 1040), Profit or Loss from Business (Sole Proprietorship)
4
Internal Revenue Service. Statutory Employees
5
Internal Revenue Service. 2025 Instructions for Schedule C (Form 1040) – Profit or Loss From Business
7
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
8
Internal Revenue Service. IRS Sets 2026 Business Standard Mileage Rate at 72.5 Cents Per Mile, Up 2.5 Cents
9
Internal Revenue Service. Simplified Option for Home Office Deduction
10
Internal Revenue Service. Self-Employed Health Insurance Deduction
11
Internal Revenue Service. Topic No. 554, Self-Employment Tax
12
Internal Revenue Service. Qualified Business Income Deduction
13
eCFR. 26 CFR 1.199A-5 – Specified Service Trades or Businesses and the Trade or Business of Performing Services as an Employee
14
Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes)
15
Social Security Administration. 2026 Cost-of-Living Adjustment (COLA) Fact Sheet
16
Internal Revenue Service. Form 1040-ES
17
Internal Revenue Service. Estimated Tax – Frequently Asked Questions
18
Internal Revenue Service. Underpayment of Estimated Tax by Individuals Penalty
19
Internal Revenue Service. When to File
20
Office of the Law Revision Counsel. 26 USC 6651 – Failure to File Tax Return or to Pay Tax
21
Office of the Law Revision Counsel. 26 USC 6654 – Failure by Individual to Pay Estimated Income Tax