Schedule C Basics: A Complete Guide for the Self-Employed
What Is Schedule C?
Schedule C (Profit or Loss from Business) is a supplemental form attached to your personal Form 1040. It's where you report income and expenses from your self-employed business — whether you're a trucker, restaurant owner, rideshare driver, or freelancer.
How to Report Income
- 1099-NEC / 1099-MISC: Income reports from your clients or platforms
- Cash income: Income without a 1099 must still be reported — the IRS requires you to report all earnings
- Add up all business income for the year and enter it in Part I
What Can You Deduct?
Schedule C Part II lists common deduction categories, including:
- Vehicle expenses (fuel, repairs, insurance, depreciation) or the standard mileage deduction
- Phone and internet (business-use percentage)
- Insurance (commercial insurance, vehicle insurance)
- Office supplies and tools
- Professional services (accounting, legal fees)
- Travel and meals (business-related; meals typically deductible at a certain percentage)
How Schedule C Affects Your Taxes
- Income - Expenses = Net Profit (Line 31)
- Net profit flows to your 1040, affecting your income tax
- Net profit is also subject to self-employment tax (Schedule SE) covering Social Security and Medicare
Common Mistakes to Avoid
- Not keeping receipts: The IRS may ask you to substantiate deductions — no documentation means no deduction
- Mixing personal and business expenses: Open a dedicated business bank account
- Underreporting income: The IRS receives copies of your 1099s and runs automated matching
- Being afraid to deduct: Legitimate business expenses are meant to be deducted — don't leave money on the table
Practical Tips
- Start categorizing expenses from day one — don't wait until tax season to sort through bank statements
- Open a dedicated business bank account to separate personal and business spending
- Spend 10 minutes each month organizing receipts and invoices
- If it's your first year, work with a tax professional who knows your industry
FAQ
Do I need to report cash income if I never got a 1099?
Yes. The IRS requires you to report all earnings, even income that never came with a 1099.
What taxes apply to my Schedule C net profit?
Net profit flows to your 1040 and is taxed as income, and it's also subject to self-employment tax (Schedule SE), which covers Social Security and Medicare.
How do I deduct vehicle expenses?
You can choose either actual expenses (fuel, repairs, insurance, depreciation) or the standard mileage deduction — not both.
What happens if I don't keep receipts?
The IRS may ask you to substantiate a deduction, and without documentation you won't be able to claim it.
Should I hire a tax professional for my first Schedule C?
It helps. Working with someone who knows your industry can save you from the mistakes most first-timers make.
This article is general tax education and does not constitute personalized tax advice. Please consult a qualified tax professional for your specific situation.