If you earned money as a freelancer last year and didn’t get it neatly reported on a W-2, the IRS wants to hear about it on Schedule C. This is the form where you report what your business brought in, subtract what you spent to run it, and calculate your actual profit. That profit number then flows to your Form 1040 and gets hit with both income tax and self-employment tax. Get Schedule C right and you pay tax only on your real earnings. Get it wrong and you either overpay or invite an audit. Here’s exactly how to fill it out.

Who Needs to File Schedule C

You need a Schedule C if you operated a business or worked as a sole proprietor or single-member LLC and earned at least $400 in net profit. That includes gig work, freelance writing, consulting, design, rideshare driving, and any 1099-NEC income.

If you ran more than one distinct business, you file a separate Schedule C for each one. A photographer who also drives for a delivery app files two forms.

The $400 threshold matters because that’s the point at which self-employment tax kicks in. Self-employment tax is 15.3% (12.4% for Social Security up to the annual wage base, plus 2.9% for Medicare) on top of regular income tax.

The Header Section

Before any numbers, Schedule C asks for basic identifying information.

Line A wants a plain description of your business, like “freelance graphic design” or “residential cleaning.”

Line B is your six-digit business activity code. You pull this from the instructions at the back of the form. Freelance writers often use 711510, and web designers frequently use 541510. Pick the closest match.

Line C is your business name if you have one. Leave it blank if you operate under your own name.

Line F asks about your accounting method. Almost every freelancer selects “cash,” which means you report income when you receive it and expenses when you pay them.

Line G asks if you “materially participated.” If you actually do the work, check yes.

Part I: Reporting Your Income

Line 1 is your gross receipts, the total of everything your business took in. This includes all your 1099-NEC and 1099-K income plus any cash or payments that didn’t generate a form.

This is where freelancers get tripped up. The IRS receives copies of every 1099 issued to you. If a client paid you $8,000 and reported it, but you only put $6,000 on Line 1, that mismatch is an automatic flag. Report every dollar, including income no client reported.

Line 2 covers returns and allowances, money you refunded to clients.

Line 4 is cost of goods sold, which most service-based freelancers can skip. It applies mainly if you sell physical products.

Line 7 is your gross income, the number you get after subtracting returns and cost of goods from gross receipts.

Part II: The Expenses That Lower Your Tax

This is the heart of the form and where you save real money. Every legitimate business expense reduces your taxable profit. The IRS standard is that an expense must be “ordinary and necessary” for your line of work.

Here are the lines freelancers use most:

Line 8, advertising, covers your website hosting, business cards, ads, and promotional costs.

Line 9, car and truck expenses, is for business driving. More on this below.

Line 11, contract labor, is what you paid other freelancers or subcontractors. If you paid any single contractor $600 or more, you’re required to issue them a 1099-NEC.

Line 15, insurance, covers business liability insurance but not your personal health insurance, which is deducted elsewhere on your 1040.

Line 17, legal and professional services, includes what you pay your accountant, bookkeeper, or attorney.

Line 18, office expense, covers printer paper, postage, and small supplies.

Line 20, rent or lease, is for equipment or office space rented outside your home.

Line 22, supplies, covers materials you use up during the year.

Line 24a, travel, is for business trips away from home. Line 24b covers 50% of business meals. You can only deduct half of meal costs, so a $60 client lunch nets a $30 deduction.

Line 25, utilities, applies to a dedicated business location, not your home.

Line 27a, other expenses, is a catch-all for costs that don’t fit elsewhere, like software subscriptions, professional memberships, and continuing education. You itemize these in Part V.

Line 28 totals all your expenses. Line 31 is your net profit or loss, the single most important number on the form.

How to Handle Vehicle Expenses

If you drive for work, you have two options and you generally pick one.

The standard mileage method lets you deduct a flat rate per business mile. For 2026, the IRS rate is $0.725 per mile. If you drove 5,000 business miles, that’s a $3,625 deduction with no receipt-tracking for gas or maintenance.

The actual expense method lets you deduct the business-use percentage of your real vehicle costs: gas, insurance, repairs, and depreciation. This works better for expensive vehicles with high operating costs.

Either way, you must keep a mileage log showing the date, destination, purpose, and miles for each trip. If you use the standard mileage rate, you’ll also complete Part IV of Schedule C, which asks when you started using the vehicle for business and your total business, commuting, and personal miles.

A note on commuting: driving from home to a regular workplace is not deductible. Driving from your home office to a client site is.

The Home Office Deduction

Freelancers who work from home can deduct a portion of their housing costs, but this comes off a separate form (Form 8829) that flows into Line 30.

The space must be used regularly and exclusively for business. A desk in the corner of a room you also use for other things doesn’t qualify.

The simplified method lets you deduct $5 per square foot of office space, up to 300 square feet, for a maximum of $1,500. The regular method calculates the actual percentage of your rent, utilities, and insurance based on how much of your home the office occupies.

Common Mistakes That Cost Freelancers Money

The biggest mistake is not tracking expenses throughout the year. Freelancers who scramble in April to reconstruct their spending almost always miss deductions. Every missed $100 expense costs you roughly $15 to $30 in extra tax.

The second mistake is mixing personal and business spending. When your accounts are tangled, you can’t cleanly prove what was a business cost, and unclear records fall apart under audit.

The third is misreporting income. Underreporting triggers a notice; overreporting means you pay tax you don’t owe.

The fourth is skipping the mileage log. Without contemporaneous records, the IRS can disallow your entire vehicle deduction.

The fifth is claiming expenses that aren’t ordinary and necessary. A freelance developer can’t deduct a family vacation just because they answered a few emails. Personal costs stay personal.

What Happens After Schedule C

Your net profit from Line 31 flows to Schedule 1 and then to your Form 1040, where it gets added to your other income. That same profit also flows to Schedule SE, where you calculate self-employment tax.

One piece of relief: you get to deduct half of your self-employment tax as an adjustment to income. So if you owe $4,000 in self-employment tax, $2,000 comes back as a deduction against your income tax.

If Line 31 shows a loss, you may be able to use it to offset other income, but repeated losses year after year can prompt the IRS to reclassify your business as a hobby, which limits your deductions.

Keep Records Year-Round

The single best thing you can do to make Schedule C painless is to track income and expenses as they happen. Every invoice, every mile, every software subscription should land in one place so that filing becomes a matter of copying numbers rather than digging through a year of bank statements.

numlr tracks your freelance income, mileage, and every deductible expense in one place all year long so filling out Schedule C in tax season takes minutes instead of a weekend of receipt-hunting. Try numlr free.