If you’re a freelancer or sole proprietor in the U.S., Schedule C (Form 1040) is the form where you report your business income and expenses to the IRS. It’s arguably the most important document you’ll file each year — it determines both your income tax and your self-employment tax. This guide walks through it section by section, in plain English.
What Is Schedule C?
Schedule C, officially titled «Profit or Loss from Business,» is attached to your personal Form 1040 tax return. It calculates your net profit or loss from self-employment, which then flows into your overall tax return and is also used to calculate self-employment tax on Schedule SE.
You’ll need to file a Schedule C if you’re a sole proprietor or a single-member LLC (by default, taxed as a sole proprietorship) and earned $400 or more in net self-employment income during the year.
Before You Start: What You’ll Need
Gather these before sitting down to fill it out:
- Total income received from freelance work (1099-NEC forms, 1099-K forms, and any income not reported on a 1099)
- A record of all business expenses, ideally categorized (software, equipment, home office, travel, etc.)
- Your business name and address (if different from your personal information), and an EIN if you have one
- Mileage log, if you deduct vehicle expenses
- Home office square footage, if you claim the home office deduction
Part I: Income
This section reports your gross receipts:
- Line 1 — Gross receipts or sales: Enter your total income from freelance work before any expenses are subtracted. This should match the combined total from all 1099-NEC and 1099-K forms you received, plus any freelance income you earned that wasn’t reported on a 1099 (clients aren’t required to send one for payments under $600).
- Line 2 — Returns and allowances: Rarely used by service-based freelancers; mostly applies to product-based businesses issuing refunds.
- Line 7 — Gross income: The result after combining the lines above.
Part II: Expenses
This is where most of your tax savings come from. Common categories freelancers use include:
- Line 8 — Advertising: Website costs, paid ads, business cards
- Line 9 — Car and truck expenses: Either mileage-based or actual expense method (see IRS guidance for current standard mileage rates)
- Line 11 — Contract labor: Payments to subcontractors or other freelancers you hired
- Line 13 — Depreciation: For equipment or property used over multiple years
- Line 17 — Legal and professional services: Accountant, bookkeeper, or lawyer fees
- Line 18 — Office expense: Supplies, small equipment
- Line 20b — Rent (equipment or other business property)
- Line 22 — Supplies
- Line 23 — Taxes and licenses: Business licenses, certain state/local taxes
- Line 25 — Utilities: Business phone line, internet (business-use portion)
- Line 27a — Other expenses: Software subscriptions, professional development, business insurance, and anything else that doesn’t fit a specific line (detailed on Part V)
Line 28 — Total expenses: Sum of all the above.
Line 31 — Net profit or loss: Gross income minus total expenses. This is the number that flows to your Form 1040 and to Schedule SE for self-employment tax.
Part III: Cost of Goods Sold
Most service-based freelancers (writers, designers, consultants, developers) can skip this section entirely — it applies to businesses that sell physical products and need to calculate inventory costs.
Part IV: Vehicle Information
If you claimed car expenses in Part II, this section asks for details supporting that deduction: total miles driven, business miles, whether you have written evidence, and whether the vehicle was available for personal use. Keeping a simple mileage log (app-based or a notebook) throughout the year makes this section painless.
Part V: Other Expenses
Any expense that doesn’t fit neatly into Part II’s specific lines gets itemized here, then the total feeds into Line 27a. Common examples: software subscriptions (design tools, project management apps), professional development courses, business insurance premiums, and bank fees on a business account.
The Home Office Deduction: A Special Case
If you use part of your home exclusively and regularly for business, you may qualify for the home office deduction, calculated separately on Form 8829 and then carried over to Schedule C. There are two methods:
- Simplified method: $5 per square foot of home office space, up to 300 square feet (max deduction of $1,500)
- Regular method: A percentage of actual home expenses (rent/mortgage interest, utilities, insurance, repairs) based on the percentage of your home used for business
The simplified method is far less paperwork; the regular method often yields a larger deduction if your home office represents a significant portion of your living space.
Common Mistakes Beginners Make
- Forgetting income not reported on a 1099: You’re required to report all freelance income, even from clients who paid you less than $600 and therefore weren’t required to issue a 1099
- Mixing personal and business expenses: Only the business-use portion of a mixed expense (like a phone or internet bill) is deductible — keeping a separate business bank account and card makes this much easier to track
- Missing the home office deduction because it seems complicated — the simplified method takes only a few minutes to calculate
- Not keeping receipts or a mileage log, which becomes a problem only if you’re ever audited, but by then it’s too late to reconstruct
- Forgetting that Schedule C flows into Schedule SE — your net profit here directly determines your self-employment tax liability, not just your income tax
What Happens After Schedule C?
Once you’ve calculated your net profit or loss on Line 31:
- That number transfers to Schedule 1 of your Form 1040 as business income
- It also transfers to Schedule SE to calculate your self-employment tax
- Half of your self-employment tax (calculated on Schedule SE) becomes a deduction back on Schedule 1
This is why Schedule C is really the starting point for your entire freelance tax picture — nearly everything else depends on the number you calculate here.
Should You Use Tax Software or a Professional?
For freelancers with straightforward income and expenses, tax software designed for self-employed filers can walk you through Schedule C step by step and catch commonly missed deductions. If your situation includes multiple income streams, employees or contractors you pay, significant assets you depreciate, or you’re considering an S-Corp election, it’s worth the cost of a CPA — the money saved in deductions and avoided mistakes usually outweighs the fee.
The Bottom Line
Schedule C might look intimidating the first time you see it, but it boils down to two simple questions: how much did your business bring in, and how much did it cost to run? Keep organized records of both throughout the year, and filling out this form becomes a matter of transcription rather than guesswork.
This article is for general informational purposes and isn’t personalized tax advice. Tax forms, deduction limits, and mileage rates are updated annually — verify current details on IRS.gov or consult a licensed tax professional for guidance specific to your situation.