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Schedule C Explained: Profit or Loss From Business

By The Ledgerism Editorial Team · The Ledgerism Brief Editorial Team produces original, methodology-disclosed accounting and tax research—data trackers, databases, and reference guides built to be the most-cited source in the field. Every figure is verified against primary sources including FASB, the IRS, the PCAOB, NASBA, the AICPA, and state boards of accountancy.

Schedule C (Form 1040) is the tax form sole proprietors and single-member LLCs use to report the profit or loss from a business. You total your business income, subtract your business expenses, and the net figure on line 31 carries to your personal return. That same number generally feeds Schedule SE, where self-employment tax is calculated. If your net earnings reach $400 or more for the year, you typically must file.

Schedule C attaches to your Form 1040. It is not a separate return. One form covers one business, so if you run two distinct sole proprietorships, you generally file two Schedule Cs.

Who Files Schedule C

You file Schedule C if you operate an unincorporated business as an individual and expect to make a profit. This covers sole proprietors, single-member LLCs that have not elected corporate treatment, statutory employees who received a W-2 with box 13 checked, and each spouse in a qualified joint venture. A filing requirement generally applies once net earnings reach $400.

The most common filers include:

• Sole proprietors: the default classification for one owner operating without forming a separate entity. Freelancers, consultants, gig workers, and independent contractors usually land here.
• Single-member LLCs: treated as “disregarded entities” for federal tax by default, so the owner reports business activity on Schedule C rather than a separate business return. This can change if the LLC files Form 8832 to be taxed as a corporation.
• Qualified joint ventures: a married couple who jointly own and materially participate in an unincorporated business may each file a separate Schedule C to split income and self-employment tax, in most cases avoiding a partnership return.
• Statutory employees: certain workers (some drivers, insurance agents, home-based workers) whose W-2 box 13 is checked report those wages on Schedule C and may deduct related expenses.

Partnerships file Form 1065, and corporations file Form 1120 or 1120-S, so those owners do not use Schedule C for the entity itself. An activity pursued without a genuine profit motive may be treated as a hobby, and hobby income is reported on Schedule 1 rather than Schedule C. Under IRC Section 183(d), the IRS may presume a profit motive if the activity was profitable in at least 3 of the last 5 years.

The Parts of Schedule C

Schedule C has five parts plus a short header. The header captures your name, Social Security number, business name, a principal business code, your accounting method (cash or accrual), and whether you materially participated. Each part below builds toward the net profit figure.

Part I: Income

Part I calculates gross income. You start with gross receipts on line 1, subtract returns and allowances on line 2, subtract cost of goods sold (line 4, carried from Part III), add other business income on line 6, and arrive at gross income on line 7. Amounts reported to you on Form 1099-NEC or 1099-K generally belong in gross receipts.

Gross income on line 7 is the top-line number every expense is measured against. Reporting all income matters here, because payment platforms and clients file information returns the IRS can match against your figures.

Part II: Expenses

Part II lists ordinary and necessary business expenses across lines 8 through 27, with total expenses on line 28. These are the day-to-day costs of running the business, separate from the direct product costs captured in COGS. Examples include advertising, contract labor, insurance, rent, supplies, and the deductible portion of vehicle costs.

After line 28, line 29 shows tentative profit or loss. Line 30 subtracts the home office deduction. Line 31 is your net profit or loss.

Part III: Cost of Goods Sold

Part III applies to businesses that make or resell products, and it is skipped by pure service businesses. The formula runs across lines 35 to 42: beginning inventory, plus purchases, plus cost of labor, plus materials and supplies, plus other costs, minus ending inventory, equals COGS. That result carries to line 4 in Part I and reduces gross income.

A maker who buys $8,000 of materials, adds $2,000 of production labor, starts with $1,000 of inventory, and ends with $1,500 has COGS of $9,500. Getting COGS right shifts where costs land, but both COGS and Part II expenses reduce taxable profit.

Part IV: Information on Your Vehicle

Part IV documents vehicle use when you claim car or truck expenses on line 9 and are not required to file Form 4562. Lines 43 to 47 ask when you placed the vehicle in service, total business miles, commuting miles, and whether you have written records. You may deduct vehicle costs using the standard mileage rate or actual expenses, but not both for the same vehicle in the same way once you choose actual costs with depreciation.

The 2025 standard mileage rate is 70 cents per mile for business driving. A filer who drives 6,000 documented business miles may deduct $4,200 using the standard rate, before comparing that to the actual-cost method.

Home Office and Form 8829

The home office deduction, entered on line 30, reduces net profit for the business use of your home. Two methods exist: the simplified method (a flat $5 per square foot, capped at 300 square feet, so a maximum of $1,500) and the regular method, which prorates actual home costs on Form 8829 and allows a larger deduction for many filers. The space must be used regularly and exclusively for business.

The simplified method needs no separate form and skips depreciation. The regular method can produce a bigger deduction when rent, mortgage interest, utilities, and depreciation on a dedicated room exceed $1,500, but it requires the detailed Form 8829 home office calculation.

Net Profit and Self-Employment Tax

Net profit or loss on line 31 flows to two places: Schedule 1 (Form 1040), line 3, which carries into your total income, and Schedule SE, which computes self-employment tax. Because a sole proprietor pays both the employer and employee shares, self-employment tax runs 15.3% on net earnings up to the Social Security wage base, then 2.9% for Medicare above it.

Schedule SE first multiplies net profit by 92.35% to reach net earnings from self-employment. One-half of the resulting self-employment tax is then deductible as an above-the-line adjustment on Schedule 1. For the mechanics and current thresholds, see the self-employment tax guide.

Net profit from Schedule C may also qualify for the Section 199A qualified business income deduction, which can shave up to 20% off qualified pass-through income, subject to income thresholds and business-type limits.

Common Schedule C Expense Categories

The table below maps frequent expenses to their Part II lines. Amounts are illustrative; your figures depend on your business and records.

Frequently Asked Questions

Who has to file a Schedule C?

Sole proprietors, single-member LLCs taxed as disregarded entities, statutory employees, and each spouse in a qualified joint venture file Schedule C to report business profit or loss. You generally must file once net self-employment earnings reach $400, because that triggers self-employment tax. Owners of partnerships and corporations report through those entity returns instead.

Do I need an EIN to file Schedule C?

Not necessarily. A sole proprietor with no employees can often use a Social Security number on Schedule C. An EIN is generally required if you hire employees, file certain excise or pension returns, or operate as a single-member LLC with employees. Many owners still get an EIN to avoid sharing an SSN with clients on Form W-9.

Can I deduct a net loss from Schedule C?

Often yes. A net loss on line 31 generally offsets other income on your Form 1040, which can lower total tax, subject to at-risk and passive activity rules. Repeated losses may draw IRS scrutiny about whether the activity is a business or a hobby. Documenting profit motive with records, marketing, and separate accounts strengthens a business position.

What is the difference between COGS and expenses on Schedule C?

Cost of goods sold (Part III) captures direct product costs: inventory, materials, and production labor for items you make or resell. Operating expenses (Part II) cover indirect costs like advertising, rent, and utilities. Both reduce taxable profit, but COGS is subtracted in Part I to reach gross income, while expenses are subtracted afterward to reach net profit.

How does Schedule C connect to self-employment tax?

Net profit on Schedule C line 31 carries to Schedule SE, which multiplies it by 92.35% and applies a 15.3% combined rate up to the Social Security wage base, plus 2.9% Medicare above it. Half of that self-employment tax is deductible on Schedule 1. The same net profit also lands on Schedule 1, line 3, as part of total income.

Can one person file more than one Schedule C?

Yes. File a separate Schedule C for each distinct business you operate as a sole proprietor. A photographer who also runs a separate consulting practice generally reports each on its own form, because each has its own income, expenses, and principal business code. The net results combine on your Form 1040.

Reviewed by The Ledgerism Editorial Team. Last reviewed: July 2026.

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