Schedule C: Reporting Business Income and Expenses on Your 1040
Who Files Schedule C
You file Schedule C if you operate a business as a sole proprietor or a single-member LLC that hasn’t elected S corp or C corp treatment. Freelancers, gig workers, independent contractors, and anyone who received a 1099-NEC for work performed — they all land here.
If you have more than one business, you file a separate Schedule C for each. And yes, your Etsy shop counts as a business even if it only made $800 last year. The IRS doesn’t have a minimum revenue threshold for filing Schedule C.
Part I: Income
Line 1 is gross receipts — everything the business brought in before expenses. If you received 1099s, those amounts should add up to at least what’s on Line 1. If clients paid you in cash or via platforms that didn’t issue a 1099, you still report it. The IRS doesn’t care whether a 1099 was issued; income is income.
Line 4 is cost of goods sold, which matters if you sell physical products. For service businesses, this is usually zero. Line 7 gives you gross income after subtracting returns and COGS.
Part II: The Deductions That Matter
This is where Schedule C earns its keep. Every dollar of legitimate business expense you claim here reduces both your income tax and your self-employment tax. That double benefit means a $1,000 deduction saves a sole proprietor roughly $350–$450 depending on their bracket.
The most common expense categories:
- Advertising (Line 8): Website costs, Google ads, business cards, Instagram promotions
- Car and truck expenses (Line 9): Standard mileage rate ($0.70/mile for 2025) or actual vehicle expenses. Pick one method and stick with it. Mileage vs. actual expenses is its own decision tree.
- Contract labor (Line 11): Payments to subcontractors and freelancers you hired
- Insurance (Line 15): Business liability, professional liability, E&O coverage
- Office expenses (Line 18): Software subscriptions, supplies, postage
- Rent (Line 20b): Coworking space, studio rental, equipment leases
- Travel (Line 24a): Flights, hotels, and meals for business trips. Meals are 50% deductible.
- Other expenses (Line 27a): Professional development, subscriptions, bank fees, anything that doesn’t fit neatly elsewhere
Line 30 is the home office deduction, which comes from Form 8829 or the simplified method ($5 per square foot, up to 300 sq ft). Working from your apartment in NYC absolutely qualifies — you just need a space used regularly and exclusively for business.
The Bottom Line: Net Profit or Loss
Line 31 is your net profit or loss. This number flows to three places: Schedule 1 Line 3 (for income tax), Schedule SE (for self-employment tax), and potentially Form 8995 (for the QBI deduction). A positive number means you owe taxes on it. A loss can offset other income on your return, subject to the hobby loss rules under Section 183.
Key Takeaway
Every legitimate business expense on Schedule C saves you roughly 30–45 cents on the dollar when you account for income tax and self-employment tax combined. Missing deductions is the most expensive mistake sole proprietors make, and we see it constantly — people forget to deduct software, professional development, mileage, and the home office.
Frequently Asked Questions
What if I have a full-time job and a side business?
You file Schedule C for the side business in addition to reporting your W-2 wages. The business income (or loss) goes on your return alongside your employment income. You’ll owe self-employment tax on the Schedule C net profit even though your employer already withholds FICA from your paycheck.
Can I deduct startup costs?
You can deduct up to $5,000 in startup costs in your first year of business (reduced dollar-for-dollar once startup costs exceed $50,000). Anything above the deductible amount gets amortized over 15 years.
When does a hobby become a business?
The IRS looks at nine factors under Section 183, but the simplest test is intent: are you genuinely trying to make a profit? If your activity shows a profit in three out of five consecutive years, the IRS generally presumes it’s a business. Consistent losses year after year without a clear path to profitability raise red flags.
Sources
Work With The Reed Corporation
Freelancers and sole proprietors are our bread and butter. If you’re not sure you’re capturing every deduction on your Schedule C, we’ll review your return and find what’s missing.