Schedule C Explained: Profit or Loss From Business
Line by line — gross receipts, cost of goods sold, the expense categories, and how the net flows to Schedule SE and Form 1040
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
Schedule C (Form 1040), Profit or Loss From Business, is the form sole proprietors and single-member LLC owners use to report a business's income and expenses. Gross receipts minus returns, cost of goods sold, and the Part II expenses produces net profit or loss, which flows to Form 1040 as income and to Schedule SE for self-employment tax.
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Who files Schedule C?
Anyone operating a business as a sole proprietor — including a single-member LLC that has not elected corporate treatment, an independent contractor, a freelancer, a gig worker, and a spouse-owned business that elected qualified-joint-venture status (two Schedule Cs, one per spouse). Partnerships file Form 1065 instead; S corporations Form 1120-S; and a hobby files nothing on Schedule C (income goes on Schedule 1 as other income, with no deductions — the hobby loss guide). Schedule C-EZ, the short form, was discontinued after 2018; everyone uses the full Schedule C.
The parts of Schedule C
| Part | Lines | What goes there |
|---|---|---|
| Header | A–J | Business name, principal activity code, EIN if any, accounting method (cash or accrual), material participation, whether 1099s were required and filed |
| Part I — Income | 1–7 | Gross receipts; returns and allowances; cost of goods sold (from Part III); other income (fuel tax credits, awards); gross income |
| Part II — Expenses | 8–27 | Advertising; car and truck; commissions; contract labor; depletion; depreciation (from Form 4562); employee benefits; insurance; interest (mortgage and other); legal and professional; office; pension plans; rent (vehicles/equipment and other); repairs; supplies; taxes and licenses; travel; meals (50 percent); utilities; wages; other (itemized in Part V) |
| Line 30 | — | Business use of home — simplified method computed here; regular method from Form 8829 |
| Line 31 | — | Net profit or loss — to Form 1040 Schedule 1 and Schedule SE |
| Line 32 | — | If a loss: at-risk investment check (Form 6198 if not all at risk) |
| Part III — Cost of goods sold | 33–42 | Inventory method; beginning inventory; purchases; labor; materials; other costs; ending inventory |
| Part IV — Vehicle information | 43–47 | Date placed in service; business, commuting, and other miles; evidence and written records |
| Part V — Other expenses | — | Itemized list for line 27b (software, bank fees, dues, education, de minimis items, etc.) |
What are the lines that cause trouble?
Line 1, gross receipts: every dollar of business income, whether or not a 1099 reported it; the 1099-K and 1099-NEC totals are reconciled to it, not copied into it. Line 9, car and truck: the standard mileage rate times business miles, or actual expenses at the business percentage — with Part IV's mileage figures supporting it and the standard mileage rate available in later years only if it was used in the vehicle's first year. Line 11, contract labor: payments to independent contractors, with the header's 1099 questions answered honestly (a "yes, required" and "no, filed" is an invitation to examine). Line 13, depreciation: from Form 4562 for assets above the de minimis threshold; small items expensed under the de minimis election go in Part V as other expenses (line 27b), not on any other line. Line 24b, meals: 50 percent of business meals; entertainment is zero. Line 26, wages: employees' gross pay (with the payroll forms behind it) — never the owner's own draw, which is not an expense. Line 30, home office: the simplified method's square-footage computation is done on the form; the regular method requires Form 8829.
What happens to a loss?
A Schedule C loss offsets other income on Form 1040 — wages, a spouse's income, investment income — subject to three checks: the at-risk rules (line 32 — you can deduct only what you have invested and are personally liable for), the excess business loss limitation (an indexed annual cap on business losses against non-business income; the excess becomes a net operating loss carryforward), and the hobby loss rules (a business that shows losses year after year with no profit motive is reclassified). A legitimate start-up loss is deductible; an activity that looks like a pastime and has not shown a profit in three of the last five years loses the presumption of a profit motive and draws the hobby analysis.
What flows where?
Net profit (line 31) goes to Schedule 1 as business income (and then to Form 1040), to Schedule SE for self-employment tax, and to Form 8995 as the starting point for qualified business income. Half the self-employment tax, the health insurance premiums, and retirement contributions are deducted on Schedule 1 — not on Schedule C — which is why the owner's own health insurance and SEP contribution never appear on the business form.
Worked example
A photographer's Schedule C: gross receipts US$96,000 (line 1, reconciled to two 1099-Ks and direct payments); cost of goods sold US$3,200 for prints and albums sold (Part III); advertising US$2,400; car and truck US$5,320 (7,600 business miles at 2025's 70-cent standard rate, with the vehicle details on Form 4562); contract labor US$6,000 (a second shooter — 1099-NEC filed, header boxes checked yes/yes); depreciation US$8,500 (a camera body and lenses above the de minimis threshold, Form 4562); insurance US$1,800; legal and professional US$900; meals US$600 (50 percent of US$1,200); other expenses US$5,800 (small equipment under the de minimis election, software, website, bank fees — itemized in Part V); business use of home US$1,500 (simplified method). Net profit, line 31: US$59,980 — to Schedule SE (self-employment tax about US$8,500), Schedule 1, and Form 8995.
Frequently asked questions
Who files Schedule C?
Sole proprietors, single-member LLC owners, independent contractors, freelancers, and gig workers — anyone operating a business without a partnership or corporation, one Schedule C per business.
What is the difference between Schedule C and Schedule C-EZ?
Schedule C-EZ was a simplified version for small businesses with minimal expenses; it was discontinued after 2018. All sole proprietors now file the full Schedule C.
Can I file Schedule C with a loss?
Yes. The loss offsets other income, subject to the at-risk rules, the excess business loss limitation, and — for repeated losses — the hobby loss analysis.
Does a single-member LLC file Schedule C?
Yes, unless it has elected to be taxed as a corporation. A single-member LLC is a disregarded entity, and its owner reports the business on Schedule C exactly as a sole proprietor would.
Official sources
The IRS states: “Use Schedule C (Form 1040) to report income or loss from a business you operated or a profession you practiced as a sole proprietor.” — Internal Revenue Service, About Schedule C (Form 1040), Profit or Loss from Business, https://www.irs.gov/forms-pubs/about-schedule-c-form-1040
Publication 334 states: “If you are self-employed as a sole proprietor or independent contractor, you generally use Schedule C (Form 1040) to figure your earnings subject to SE tax.” — Internal Revenue Service, Publication 334, Tax Guide for Small Business, https://www.irs.gov/publications/p334
Next step
Fairlight Accounting is a cross-border accounting and tax practice with a U.S. Tax Desk and a Canadian Tax Desk. Our U.S. Tax Desk handles Schedule C preparation with 1099 reconciliation, Form 4562 and Form 8829 coordination, loss-limitation review, and bookkeeping setup for sole proprietors. See pricing or book a call.
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