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Schedule C: Profit or Loss from Business (Complete Guide)

Tax information is for educational purposes only and does not constitute tax advice. Consult a licensed tax professional for your specific situation.

Schedule C is the IRS form that sole proprietors, freelancers, independent contractors, and single-member LLC owners use to report business income and expenses. If you received a Form 1099-NEC from a client, earned money through a gig platform, or ran any unincorporated business during the tax year, you almost certainly need to file Schedule C. Your net profit or loss flows to your Form 1040 and also determines how much self-employment tax you owe.

This guide walks through every section of the form so you know exactly what to report, what to deduct, and how to avoid common audit triggers.

Where to Get Schedule C

Download Schedule C and its instructions at irs.gov/forms-pubs/about-schedule-c-form-1040. All major tax preparation software generates Schedule C when you indicate self-employment income.

Who Must File Schedule C?

You need Schedule C if you:

Operated a business as a sole proprietor (no formal business entity)
Worked as an independent contractor or freelancer
Earned gig economy income (rideshare, food delivery, task-based platforms)
Received 1099-NEC forms showing $600 or more in nonemployee compensation
Own a single-member LLC that is not elected to be taxed as a corporation
Had a side business earning income alongside a W-2 job

You do not need Schedule C if your business is a partnership (use Form 1065), S corporation (use Form 1120-S), or C corporation (use Form 1120).

$400 threshold: If your net self-employment earnings are $400 or more, you must also file Schedule SE to calculate self-employment tax.

Top Section: Business Information

Before the income and expense sections, Schedule C collects key details about your business:

Line A: Principal business or profession (e.g., “Freelance Writing,” “Graphic Design,” “Rideshare Driver”)
Line B: Business activity code — a six-digit NAICS code from the instructions
Line C: Business name (if different from your personal name)
Line D: Employer Identification Number (EIN), if you have one
Line E: Business address
Line F: Accounting method — most sole proprietors use Cash (income recorded when received, expenses when paid)
Line G: Did you “materially participate” in the business? Almost always Yes for active business owners
Line H: If this is your first year in business, check the box
Line I: Did you make required 1099 payments? If you paid any contractor $600+ during the year, you should have issued 1099-NEC forms
Line J: Filing method — regular Schedule C or the simplified Schedule C-EZ (note: Schedule C-EZ was discontinued after 2018; all filers now use Schedule C)

Part I: Income (Lines 1-7)

Line 1: Gross Receipts or Sales

Your total business income before any deductions. This includes:

All payments received from clients (whether or not you received a 1099)
Income from selling products
Fees for services

Important: Report all income, not just amounts shown on 1099-NEC forms. If a client paid you $500, that is still taxable income even though no 1099 was issued (the $600 reporting threshold only triggers the payer’s obligation to send a form).

Line 2: Returns and Allowances

Refunds or discounts you gave to customers.

Line 4: Cost of Goods Sold (COGS)

If you sell physical products, your cost of goods sold is calculated in Part III of Schedule C. This includes raw materials, inventory purchases, and direct labor costs for production. Service businesses typically leave this blank.

Line 5: Gross Profit

Line 1 minus Line 2 minus Line 4.

Line 6: Other Income

Includes income like scrap sales, bad debts recovered, interest on business accounts, and fuel tax credits.

Line 7: Gross Income

Line 5 plus Line 6. This is your total business income before expenses.

Part II: Expenses (Lines 8-27)

This is the core of Schedule C where you deduct legitimate business expenses. Every deduction must be ordinary (common in your industry) and necessary (helpful and appropriate for your business).

Major Expense Categories

Line	Expense	Notes
8	Advertising	Website ads, business cards, marketing materials
9	Car and truck expenses	Business use of personal vehicle (standard mileage ~$0.70/mile OR actual expenses)
10	Commissions and fees	Payments to agents, subcontractors (under $600), platform fees
11	Contract labor	Payments to contractors (also report on 1099-NEC if $600+)
13	Depreciation	Form 4562 for assets with useful life over 1 year. Section 179 allows immediate expensing of qualifying assets up to ~$1,250,000
14	Employee benefit programs	Health insurance, retirement plan contributions for employees
15	Insurance	Business liability, professional liability, commercial property
16a	Mortgage interest	On business property
16b	Other interest	Business loans, business credit cards
17	Legal and professional services	Attorney fees, CPA fees, tax preparation (business portion)
18	Office expense	Supplies, postage, software subscriptions
19	Pension/profit-sharing plans	SEP-IRA, SIMPLE IRA, Solo 401(k) employer contributions
20	Rent or lease: vehicles, machinery	Equipment leases
21	Rent or lease: other business property	Office rent, co-working space
22	Repairs and maintenance	Equipment repairs, website maintenance
23	Supplies	Materials consumed in the course of business
24a	Travel	Business travel (airfare, lodging, rental cars — meals are separate)
24b	Deductible meals	Business meals at 50% (down from the temporary 100% during COVID years)
25	Utilities	Business phone, internet (business-use portion)
26	Wages	Payments to W-2 employees
27a	Other expenses	Anything not covered above (list in Part V)

Line 28: Total Expenses

Sum of lines 8 through 27.

Part III: Cost of Goods Sold (Lines 33-42)

Only complete this section if you sell products. It captures:

Beginning inventory
Purchases
Cost of labor
Materials and supplies
Ending inventory
Your inventory valuation method (cost, lower of cost or market, other)

Part IV: Vehicle Information (Lines 43-47)

If you claimed car expenses on Line 9, you must answer questions about your vehicle use:

Date vehicle was placed in service
Business miles driven
Commuting miles
Other personal miles
Whether you have written evidence to support your deduction
Whether the evidence is contemporaneous (recorded at or near the time of use)

Standard mileage rate for 2026: ~$0.70 per mile for business use. Alternatively, you can track actual expenses (gas, insurance, maintenance, depreciation) and multiply by the business-use percentage.

Common mistake: Deducting commuting miles. Driving from home to your regular place of business is commuting, not a business expense. However, if your home IS your principal place of business, trips from home to client sites or business locations are deductible.

Part V: Other Expenses (Line 48)

List any additional business expenses not captured in Part II. Common entries include:

Continuing education and professional development
Business-related books and publications
Website hosting and domain registration
Professional organization dues
Bank fees on business accounts
Software subscriptions (project management, invoicing, etc.)

Home Office Deduction (Form 8829)

If you use part of your home regularly and exclusively for business, you can deduct a portion of your housing costs. You have two options:

Simplified method: Deduct ~~$5 per square foot of home office space, up to 300 square feet (~~$1,500 maximum)
Regular method (Form 8829): Calculate actual expenses (mortgage interest/rent, utilities, insurance, repairs, depreciation) based on the percentage of your home used for business

For a full walkthrough, see our home office deduction guide. The home office deduction is entered on Line 30 of Schedule C.

Net Profit or Loss (Line 31)

Line 7 (gross income) minus Line 28 (total expenses) minus Line 30 (home office deduction) equals your net profit or loss.

Where Your Net Profit Flows

Your Schedule C net profit feeds into multiple places:

Form 1040, Schedule 1 — Added to your other income to calculate AGI
Schedule SE — Used to calculate self-employment tax (15.3% on 92.35% of net profit)
Qualified Business Income (QBI) deduction — Up to 20% of net profit may be deductible under Section 199A (made permanent by the OBBB)

If you have a net loss, it offsets other income on your Form 1040. However, the IRS may classify your activity as a hobby rather than a business if you show losses too frequently (general guideline: profit in 3 of the last 5 years, though this is not an absolute rule).

Common Audit Triggers on Schedule C

The IRS scrutinizes certain patterns on Schedule C returns:

High deductions relative to income — Deductions exceeding 50-60% of gross income invite questions
Rounded numbers — Entering $5,000 for every category suggests estimation rather than record-keeping
Large meal and travel deductions — Keep detailed records with business purpose, attendees, and dates
Home office deduction — Make sure the space is truly exclusive-use; a desk in your bedroom where you also watch TV does not qualify
Cash businesses — The IRS pays extra attention to businesses that receive cash payments
Repeated losses — Multiple years of losses raise the hobby-loss question
Vehicle expenses — Claiming 100% business use is a red flag unless you have a separate personal vehicle

Best practice: Keep receipts, mileage logs, and bank/credit card statements. Use separate business accounts to create a clear paper trail.

E-Filing Schedule C

All major tax software supports Schedule C. The software will:

Walk you through income and expense entry
Calculate depreciation (Form 4562)
Handle the home office deduction (Form 8829)
Automatically generate Schedule SE
Apply the QBI deduction if eligible

If your business has expenses under ~$5,000, no employees, no inventory, and no depreciation, some software may offer a streamlined entry process, but the underlying form is still the full Schedule C.

Frequently Asked Questions

Do I need a separate Schedule C for each business?

Yes. If you operate multiple unrelated businesses, file a separate Schedule C for each one.

Can I deduct health insurance premiums on Schedule C?

Self-employed health insurance premiums are deducted on Schedule 1 (Line 17) as an adjustment to income, not on Schedule C. However, the deduction is available because you have Schedule C income.

What is the difference between Schedule C and Schedule C-EZ?

Schedule C-EZ was a simplified version for businesses with expenses under $5,000, no inventory, no employees, and no home office deduction. The IRS discontinued it after the 2018 tax year. All sole proprietors now use Schedule C.

Do I need an EIN to file Schedule C?

Not necessarily. If you have no employees and are a sole proprietor, you can use your Social Security number. However, an EIN is required if you have employees, file certain excise tax returns, or have a Keogh plan.

How does the QBI deduction work with Schedule C?

The Section 199A qualified business income deduction allows you to deduct up to 20% of your qualified business income from a pass-through business. For Schedule C filers, your QBI is generally your net profit. The deduction has income-based phaseouts for specified service trades or businesses (SSBs). This deduction was made permanent under the One Big Beautiful Bill.

Tax information is for educational purposes only and does not constitute tax advice. Consult a licensed tax professional or visit irs.gov for official guidance on your specific tax situation.