Fill Out Schedule C (Form 1040) in 2026

Schedule C (Form 1040) is an IRS tax form that you attach to your individual income tax return. You use it to report income or loss from a business you ran or a profession you practiced as a sole proprietor. This often includes work by freelancers, gig workers, and owners of single-person businesses.

The form lists your business income and allowed expenses. Subtracting expenses from income gives you a net profit or loss. IRS Form 1040 Schedule C: line 31 shows this result, which carries to other parts of your tax return. Your net profit may also be used to calculate self-employment tax. The 1040 Schedule C instructions explain which income and expenses to report. Completing the form correctly helps you claim valid deductions, avoid paying too much tax, and reduce the risk of penalties for inaccurate reporting.

You use Schedule C when you earn or lose money from a business you run or a profession you practice as a sole proprietor. The activity must have income or profit as its main purpose and be carried on with continuity and regularity. It can cover payments reported on Forms 1099-NEC, 1099-K, or 1099-MISC, a business with no income, and certain qualified joint ventures.

The form calculates your net profit or loss. IRS Form 1040 Schedule C: line 31 shows this result, which generally carries to Schedule 1 and may affect Schedule SE and self-employment tax. Check the 1040 Schedule C instructions to confirm where to report the amount for your tax year.

Schedule C (Form 1040), Profit or Loss From Business (Sole Proprietorship), is issued by the Department of the Treasury, Internal Revenue Service (IRS). You can also get the current blank form and official instructions from the IRS website.

PDFLeader has a blank Schedule C (Form 1040) pre-loaded in our browser-based editor, so you do not need to download a template from another source. PDFLeader helps you fill out and download the completed form for future use. PDFLeader does not file or submit the form to the IRS.

Schedule C (Form 1040) is not filed on its own. Attach it to Form 1040, 1040-SR, 1040-SS, 1040-NR, or 1041, as applicable. To file electronically, include the completed schedule with your federal tax return through tax preparation software or an authorized e-file provider.

If you file by mail, place Schedule C in the correct sequence with your paper return. Send the full return to the IRS service center assigned to your location. Check the mailing address listed in the instructions for the tax return you are filing, since the correct IRS office can vary by state and payment status.

Sole proprietors and owners of single-member LLCs taxed as sole proprietorships complete Schedule C. This group includes freelancers, independent contractors, and gig workers who run unincorporated businesses. Spouses in a qualified joint venture may each need a separate Schedule C. The 1040 Schedule C instructions explain these filing rules. Partnerships generally file Form 1065 instead.

You use the result to complete your individual tax return. For the transfer step, IRS Form 1040 Schedule C: line 31 shows the net profit or loss. You may also use that amount on Schedule SE to calculate Social Security and Medicare taxes. The IRS uses the reported data to process the return and administer tax rules for small businesses and self-employed taxpayers.

No, you do not need to sign Schedule C separately. It has no signature line because your signature on Form 1040 covers its attached schedules. You can fill out Schedule C in PDFLeader and download the completed form, then file it with Form 1040 elsewhere. PDFLeader does not submit forms. Check the latest IRS updates before filing.

Have your name of proprietor and Social Security number (SSN), plus your business name, NAICS activity code, accounting method, and material participation details. Gather records for gross receipts or sales and returns and allowances, including every sales channel and customer refund. If you sell products, keep inventory and purchase records for cost of goods sold from Part III; service businesses enter zero. Also collect records for other income.

Keep receipts, invoices, and records for Part II, lines 8–27a, expenses by category. For line 27a/Part V, prepare each other expense type and amount. For line 30, gather home-office costs and attach Form 8829 unless you use the simplified method. Use the 1040 Schedule C instructions for these entries. Check IRS Form 1040 Schedule C: line 31 to calculate net profit or (loss), then report a profit on Schedule 1 (Form 1040), line 3, and Schedule SE, line 2.

Schedule C (Form 1040) is due with your annual individual income tax return, usually by April 15. For a 2025 return filed in 2026, the due date is April 15, 2026. If April 15 falls on a weekend or legal holiday, the deadline moves to the next business day.

You may file Form 4868 by the original due date to get an automatic six-month filing extension to October 15, 2026. This gives you more time to file, but not more time to pay. Estimate and pay any tax owed by the original April deadline.

You do not need Schedule C (Form 1040) when an activity is a hobby, is not carried on for profit, or occurs only on a sporadic basis. A business activity must have continuity and regularity and be conducted to earn income or profit.

Other reporting rules may apply based on the income. A qualified joint venture may report rental real estate income on Schedule E when the activity is not subject to self-employment tax. Income from a single-member LLC may also appear on another schedule if its nature calls for different treatment. Report deductible retirement plan contributions for yourself on Schedule 1, not Schedule C. Check current IRS guidance for your activity before choosing a schedule.