Schedule C is the form you file with your tax return to report income and expenses from self-employment or a business you own

Schedule C (officially "Profit or Loss from Business") is the IRS form where you report what you earned and what you spent running a business or working for yourself. The IRS uses it to calculate how much self-employment tax you owe and whether you made a profit or loss. If you are a sole proprietor, freelancer, independent contractor, or own a business without a separate legal structure, you file Schedule C.

The form goes with your personal tax return (Form 1040), not as a separate filing. You report your gross income at the top, subtract your business expenses, and the result is your net profit or loss. That number then flows to your main tax return to determine your total tax bill.

Key Takeaways

  • Schedule C reports self-employment income and business expenses; you file it along with Form 1040 as part of your personal tax return.
  • You need Schedule C if you are self-employed, a freelancer, an independent contractor, or a sole proprietor — not if you work as a W-2 employee.
  • The form requires you to list gross income, then subtract deductible business expenses to arrive at net profit or loss.
  • Net profit from Schedule C is subject to self-employment tax (Social Security and Medicare), which you calculate on Schedule SE.

Who has to file Schedule C

You file Schedule C if you have self-employment income — money you earned from work where you are not an employee on someone else's payroll. This includes freelancers, consultants, contractors, gig workers, and anyone who owns a sole proprietorship. If you received a 1099-NEC or 1099-MISC form from a client or customer, that is a signal you will need Schedule C.

You do not file Schedule C if you are a W-2 employee, even if you have a side job that generates a small amount of income. However, if that side work is self-employment income, you still report it on Schedule C. The threshold for filing is low: the IRS requires Schedule C if you had net self-employment income of $400 or more in the tax year, though you may want to file even below that threshold to report a loss.

What goes in the income section

At the top of Schedule C, you report your gross income — the total money you received from your business before any expenses. This includes cash payments, checks, payments through apps like PayPal or Venmo, and the fair market value of any goods or services you received as payment. You do not subtract anything yet; gross income is the raw total.

If you had returns or refunds (money you gave back to customers), you subtract those from gross income to get your net sales. Some businesses also have other income sources — interest, rental income from business property, or gains from selling business assets — which go in separate lines on the form.

What business expenses you can deduct

After reporting gross income, you list your business expenses — the costs of running your business. Deductible expenses must be both ordinary (common in your type of work) and necessary (helpful to your business). Common deductions include office supplies, equipment, software subscriptions, vehicle mileage, rent or mortgage interest for a home office, utilities for a dedicated workspace, professional fees, insurance, and advertising.

You cannot deduct personal expenses, even if you use them partly for work. For example, you cannot deduct your entire internet bill, but you can deduct the portion that is strictly for business. Home office deductions are allowed but have specific rules: you can use either the simplified method (a flat rate per square foot) or actual expense method (calculating your real costs). Vehicle mileage is deductible at the IRS standard rate for the year, but only for business miles — commuting to a regular workplace does not count.

Keep records of all expenses: receipts, invoices, bank statements, and mileage logs. The IRS does not ask for these when you file, but you must have them if you are audited.

How net profit or loss is calculated

Schedule C subtracts your total business expenses from your gross income to arrive at your net profit or loss. If you earned $50,000 and spent $15,000 on business expenses, your net profit is $35,000. That $35,000 is what counts as your taxable self-employment income.

If your expenses exceed your income, you have a net loss. You can carry that loss forward to reduce income in future years, though there are limits on how much loss you can deduct in a single year depending on your total income and other factors. A loss does not mean you owe nothing — you still file Schedule C to report it, and it may reduce your overall tax bill.

Self-employment tax and Schedule SE

Your net profit from Schedule C is subject to self-employment tax, which covers Social Security and Medicare. This is separate from income tax. You calculate self-employment tax on Schedule SE (Self-Employment Tax), a companion form to Schedule C. Self-employment tax is roughly 15.3% of your net profit (the exact rate varies slightly year to year).

If you had net self-employment income of $400 or more, you must file Schedule SE. The amount you owe goes on your Form 1040 as an additional tax liability. You can deduct half of your self-employment tax as an adjustment to income, which lowers your taxable income slightly.

Where Schedule C fits in your overall return

Schedule C is not filed alone. You complete it, then transfer the net profit or loss to your Form 1040 (your main personal tax return). That number becomes part of your total income for the year. You also file Schedule SE to calculate self-employment tax, which also goes on Form 1040. If you have multiple businesses or self-employment income from different sources, you may file more than one Schedule C.

If you incorporate your business as an S-corporation or LLC taxed as a corporation, you do not file Schedule C. Instead, your business files its own tax return, and you report your share of profit or loss on a different form (Schedule K-1). But most self-employed people and sole proprietors use Schedule C.

Frequently Asked Questions

Do I have to file Schedule C if I only made a small amount of self-employment income?

If your net self-employment income was less than $400, you are not required to file Schedule C or Schedule SE. However, if you had a loss or if filing would result in a refund, you may want to file anyway. Check with a tax professional about your specific situation.

Can I deduct my home office if I work from home?

Yes. You can use the simplified method (a flat rate per square foot of dedicated office space) or calculate your actual expenses (utilities, rent, insurance, repairs). The space must be used regularly and exclusively for business — not a bedroom you sometimes use for work.

What if I received a 1099 form but made a loss?

You still file Schedule C to report the loss. The 1099 shows what the payer reported to the IRS, so filing Schedule C with a loss creates a record that matches. A loss can reduce your overall tax bill and may carry forward to future years.

Is mileage deduction the same as vehicle expense deduction?

They are two different methods. You can deduct either the standard mileage rate (set by the IRS each year) for business miles driven, or your actual vehicle expenses (gas, maintenance, insurance, depreciation) using the actual expense method. You cannot use both in the same year for the same vehicle.

What happens if I do not file Schedule C when I should have?

The IRS may assess penalties and interest if you underreport income. If you received a 1099 form, the IRS has a record of that income. Filing Schedule C, even late, is better than not filing. Consider consulting a tax professional if you missed prior years.