IRS Schedule C Explained: A Plain-English Guide for Self-Employed Workers

If you're self-employed — freelancer, contractor, gig worker, side hustler — you file IRS Schedule C (Form 1040) with your personal tax return. It's how you report your business income and deductions as a sole proprietor.

Schedule C is where the magic happens: every legitimate business expense you list here reduces your taxable income (and your self-employment tax). Yet most self-employed workers either overpay because they miss deductions, or make mistakes that increase audit risk.

Here's what every line means, in plain English.

Part I: Income (Lines 1-7)

Line 1 — Gross Receipts: Total money your business earned. All of it. Every Venmo payment, cash job, invoice paid, and 1099 amount.

Line 2 — Returns & Allowances: Refunds you gave to clients.

Line 4 — Cost of Goods Sold: If you sell physical products, the cost of materials. Most service-based freelancers leave this blank.

Line 7 — Gross Income: This is Line 1 minus Line 2 minus Line 4. Your starting income before expenses.

Part II: Expenses (Lines 8-27) — Where You Save Money

This is the section that determines your tax bill. Every dollar here reduces your taxable income.

Line 9 — Car & Truck Expenses: Your mileage deduction (72.5¢/mile in 2026 for business use) OR actual vehicle expenses. This is often the biggest single deduction for mobile professionals.

Line 10 — Commissions & Fees: PayPal fees, Stripe fees, referral commissions, platform fees (Fiverr's cut, Upwork's cut).

Line 11 — Contract Labor: Payments to subcontractors (anyone you paid $600+ gets a 1099).

Line 13 — Depreciation: Large equipment or assets that lose value over time. Section 179 lets you deduct the full cost in year one for many items.

Line 15 — Insurance: Business liability insurance, professional liability, equipment insurance. NOT health insurance (that goes elsewhere on your 1040).

Line 17 — Legal & Professional Services: CPA fees, attorney fees, bookkeeper, tax preparation.

Line 18 — Office Expenses: Printer ink, paper, pens, computer accessories, software subscriptions.

Line 22 — Supplies: Materials consumed in your work that aren't "office" supplies. For lawn care: trimmer line, blades, trash bags. For photographers: memory cards, batteries.

Line 24a — Travel: Business travel away from your tax home — flights, hotels, rental cars. NOT your daily driving (that's Line 9).

Line 25 — Utilities: If you have a dedicated business space, the utilities for it.

Line 27 — Other Expenses: The catch-all. Anything legitimate that doesn't fit elsewhere. Common entries: cell phone (business %), advertising, software subscriptions, parking fees, tolls.

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

Only applies if you sell physical products. Service businesses skip this.

Part IV: Vehicle Information (Lines 43-47)

If you claimed vehicle expenses on Line 9, you must answer questions about your vehicle use — total miles driven, business miles, personal miles, commuting miles, and whether you have written records.

This is where GPS mileage tracking is invaluable. "Do you have written evidence to support your deduction?" — Yes, you have GPS-tracked routes with timestamps, addresses, and maps.

How SimplyExpensed Maps to Schedule C

SimplyExpensed uses GAAP-compliant categories that map directly to Schedule C line items. When you export a Schedule C report, expenses are already organized by the correct line — your CPA doesn't have to re-categorize anything.

Combined with GPS mileage tracking for Line 9, you have a complete, audit-ready Schedule C package.

Start organizing your Schedule C for free →