Fill IRS Schedule C Online
The official Schedule C (Form 1040). Report your sole-proprietor business income and expenses in your browser. Nothing is uploaded.
Drop fillable PDF here
or click to browse
Related Tools
About Schedule C
Schedule C, "Profit or Loss From Business," is the form sole proprietors and single-member LLCs attach to their Form 1040 to report what a business earned and spent. If you got a 1099-NEC, drove for a rideshare app, freelanced, or sold things on the side, this is usually where that income lands. You list your gross receipts at the top, subtract your business expenses, and the result is your net profit or loss for the year.
That net number does double duty. It flows to your Form 1040 as income, and it also flows to Schedule SE, where self-employment tax (Social Security and Medicare, about 15.3%) is calculated on your profit. Because of that second step, many people who file a Schedule C also need to make quarterly estimated payments with Form 1040-ES so they are not hit with a large bill and an underpayment penalty in April.
FormatFuse opens the official IRS Schedule C and lets you type into every field in your browser. Your business numbers, address, and SSN or EIN never leave your device. The form has five parts: income (Part I), expenses (Part II), cost of goods sold if you carry inventory (Part III), vehicle details (Part IV), and a space for other expenses (Part V). Work from the official IRS Schedule C instructions for what belongs on each line, fill it here, and download the finished PDF to attach to your return.
How to fill Schedule C
- 1
Top section — business identity
Enter your name, SSN, the business name and address, your principal business or profession, and the activity code from the IRS instructions.
- 2
Part I — Income
Enter gross receipts (this includes amounts reported to you on 1099-NEC and 1099-K), returns, and cost of goods sold to reach gross profit.
- 3
Part II — Expenses
List ordinary and necessary business expenses by category: advertising, supplies, contract labor, home office, and so on. Total them on the expenses line.
- 4
Parts III–V — Inventory, vehicle, other
Complete cost of goods sold if you hold inventory, vehicle information if you deduct mileage, and itemize any other expenses not listed in Part II.
- 5
Net profit or loss
Subtract expenses from gross profit. Carry the result to your Form 1040 and Schedule SE, then download the completed Schedule C to attach to your return.
Privacy reminder. Your inputs — including your SSN, EIN, or PAN — never leave your browser. We do not log or transmit form values.
This tool fills the form, it does not give advice. It puts the information you enter onto the official PDF. It does not calculate your taxes, check your answers, or tell you if something is wrong. Compare everything to the official instructions, and if your situation is anything beyond simple, have a professional review it before you file or submit.
FormatFuse is a privacy-first form filler, not a tax preparer, and we are not affiliated with the IRS. Schedule C feeds your Form 1040 and your self-employment tax, so an error here affects your whole return. Work from the official IRS Schedule C instructions, and have a tax professional review it if your income or expenses are at all complex.
Frequently asked questions
Who needs to file a Schedule C?
Sole proprietors and single-member LLCs that are taxed as disregarded entities use Schedule C to report business income and expenses. If you freelance, contract, drive for an app, or run a side business and you are not set up as a corporation or partnership, your business activity usually goes on Schedule C with your personal Form 1040.
Where does my 1099-NEC income go on Schedule C?
Income reported to you on a 1099-NEC (and 1099-K) is part of your gross receipts in Part I, Line 1. You report the full amount you earned from the business, whether or not a client sent you a 1099, then deduct your business expenses in Part II.
Do I pay self-employment tax on my Schedule C profit?
Generally yes. Your net profit from Schedule C flows to Schedule SE, where self-employment tax of roughly 15.3% (Social Security and Medicare) is calculated, in addition to regular income tax. Because nothing is withheld from self-employment income, many filers also make quarterly payments using Form 1040-ES.
What expenses can I deduct on Schedule C?
You can deduct expenses that are ordinary and necessary for your business, such as supplies, advertising, software, contract labor, business travel, and a home office if you qualify. The official IRS Schedule C instructions list each category and the rules. Keep records, and when a deduction is unclear, check the instructions or ask a tax professional.
Is it safe to fill out my Schedule C here?
Yes. The PDF and everything you type, including your SSN or EIN and your income figures, stay in your browser. There is no upload and no server that could log it. You can confirm in your browser's Network tab, then download and attach it to your return yourself.
Related forms
In the same cluster — fillers for connected forms in the tax workflow.