What Is Schedule C?

Schedule C, Profit or Loss From Business, is a federal form attached to Form 1040 or 1040-SR. Sole proprietors and certain single-member LLC owners use it to report income and expenses from a trade or business and calculate the activity's net profit or loss.

Who files Schedule C?

An individual generally files Schedule C for a business operated as a sole proprietorship. An individual who owns a single-member LLC that is disregarded for federal income-tax purposes also commonly uses Schedule C for an active trade or business.

A statutory employee may use Schedule C when applicable. A qualifying spousal joint venture may use separate Schedules C instead of a partnership return.

A partnership does not generally report its business on Schedule C; it normally files Form 1065. An S corporation normally files Form 1120-S, and a C corporation Form 1120. Rental real estate commonly appears on Schedule E, while farming generally uses Schedule F.

Use a separate Schedule C for each distinct business. Multiple revenue streams within one integrated business do not automatically require separate forms, but genuinely different trades or businesses generally do.

How does Schedule C work?

Schedule C is organized into five parts:

1. Income: Gross receipts or sales, returns and allowances, cost of goods sold, and other business income.
2. Expenses: Categories such as advertising, vehicle costs, contract labor, insurance, legal fees, rent, repairs, supplies, taxes, travel, meals, utilities, and wages.
3. Cost of goods sold: Inventory and production or merchandise costs.
4. Information on your vehicle: Business-use and substantiation questions when vehicle expenses are claimed.
5. Other expenses: Specifically described expenses not placed on the listed lines.

The heading also asks for the business identity, accounting method, principal activity, business code, material participation, and information-return questions.

Schedule C example

Assume a self-employed bookkeeper reports:

The $65,000 generally flows into the individual income-tax return. It also commonly enters the Schedule SE calculation for self-employment tax. The exact self-employment-tax amount is not simply $65,000 multiplied by 15.3%; Schedule SE applies its own net-earnings calculation, Social Security wage base, and interaction with wages.

If deductible expenses exceeded income, Schedule C could show a net loss. The current deduction may be affected by whether the activity is a trade or business and by at-risk, passive-activity, excess-business-loss, and other limitations.

What income goes on Schedule C?

Report all business income, not only amounts shown on Forms 1099-NEC, 1099-K, or 1099-MISC. Cash, checks, cards, payment apps, barter, and other receipts can be taxable even when no information return is issued.

Reconcile gross receipts to bank deposits, merchant reports, invoices, bookkeeping, and Forms 1099. A Form 1099-K can report gross payment volume without subtracting refunds, fees, tips paid out, or personal transfers. Those items must be classified rather than netted without explanation.

Product sales may require inventory and cost-of-goods-sold reporting. Sales tax collected can require different treatment from revenue.

What expenses go on Schedule C?

Only qualifying business costs belong on Schedule C. They generally must be ordinary and necessary, properly allocated between business and personal use, substantiated, and currently deductible rather than capitalized.

Owner draws, federal income-tax payments, personal expenses, loan principal, and charitable contributions are not Schedule C expenses merely because the business account paid them. Some business-related deductions — such as the deductible part of self-employment tax and qualifying self-employed health-insurance deduction — are generally claimed elsewhere on Form 1040 rather than on Schedule C.

Schedule C vs. Schedule SE

Schedule C calculates business net profit or loss. Schedule SE calculates Social Security and Medicare taxes on net earnings from self-employment. They are separate forms with different purposes.

Reducing Schedule C profit with a legitimate business deduction will generally affect both income tax and self-employment-tax calculations. An above-the-line deduction taken elsewhere may reduce income tax without reducing Schedule C profit in the same way.

California Schedule C reporting

California sole proprietors generally use the federal Schedule C to report business income and expenses, then report the result on Form 540 or Form 540NR. California-source rules matter for nonresidents and part-year residents.

California does not conform to every federal business deduction, depreciation election, or limitation. Schedule CA may adjust federal amounts. A sole proprietor may also have estimated-tax, EDD employer, CDTFA sales-tax, local license, or other filing requirements that do not appear on Schedule C.

A California single-member LLC may use Schedule C federally but still generally has separate Form 568 and annual LLC tax obligations. Disregarded federal treatment does not erase the state-law entity.

Common Schedule C mistakes

• Reporting only Forms 1099 instead of all business income
• Reporting a 1099-K without reconciling refunds, fees, and nonbusiness transactions
• Mixing multiple unrelated businesses on one Schedule C
• Deducting personal costs, owner draws, or federal income-tax payments
• Claiming both standard mileage and the same actual vehicle costs
• Putting inventory purchases directly in supplies without cost-of-goods-sold analysis
• Omitting cash or barter income
• Failing to answer information-return questions or file required Forms 1099
• Forgetting Schedule SE, estimated taxes, California adjustments, or Form 568

Frequently asked questions

Related terms

• Sole Proprietorship
• Business Expense
• Self-Employment Tax
• Single-Member LLC

Official sources

• IRS — About Schedule C
• IRS — 2025 Instructions for Schedule C
• IRS — Publication 334, Tax Guide for Small Business
• IRS — Self-employed individuals tax center
• California FTB — Sole proprietorship
• California FTB — Guide to common forms of ownership

The definitions and examples on this page are for informational purposes only and do not constitute tax advice. Tax laws change frequently and individual circumstances vary. Consult a qualified tax professional before making decisions based on this content.