Updated October 18, 2026. Quick answer: Line 1 is where the business income starts. You enter the gross receipts from your trade or business, checking any Forms 1099 you received for business income so that nothing on them is missed. Wages reported to you as a statutory employee also go here, with a box checked. The number then flows down through line 3 toward your gross income and, in the end, your net profit.
Picking the Schedule C business code for your work (2025 chart): Schedule C code for handymen, Schedule C code for construction trades and Schedule C code for insurance agents.
Picking the Schedule C business code for your work (2025 chart): Schedule C code for rideshare and delivery drivers, Schedule C code for photographers and Schedule C code for hair, nail, and beauty.
What line 1 asks for
The form’s caption reads “Gross receipts or sales. See instructions for line 1 and check the box”. The line 1 instructions begin with the basic rule: “Enter gross receipts from your trade or business.” “Be sure to check any Forms 1099 you received for business income that must be reported on this line.”
Line 1 sits in Part I, the income part of the schedule. It is a gross figure: the next lines on the form are where returns, allowances and the cost of goods sold come off, as the Schedule C lines 2 to 5 page explains. For the schedule as a whole, start from the Schedule C (Form 1040) page.
Where the number on line 1 comes from
The instructions tell you to “Be sure to report all income attributable to your trade or business from all sources.” They explain that you may receive Forms 1099 listing amounts that may be income from your business activities, and they name three: Form 1099-MISC, Form 1099-NEC and Form 1099-K. The General Instructions describe the same list, saying Schedule C is also used to report “certain amounts shown on a Form 1099, such as Form 1099-MISC, Form 1099-NEC, and Form 1099-K.”
For nonemployee pay, the instruction is specific: “If you received one or more Forms 1099-NEC, be sure line 1 includes amounts properly shown on your Forms 1099-NEC.” “If the total amounts that were reported in box 1 of Forms 1099-NEC are more than the total you are reporting on line 1, attach a statement explaining the difference.” Box 1 of that form is walked through on the Form 1099-NEC box 1 page, and card and payment-app income is covered on the Form 1099-K box 1a page.
Statutory employees
A small group of workers get a Form W-2 but report on Schedule C. The instructions say that when the statutory employee box in box 13 of the W-2 is checked, you “report your income and expenses related to that income on Schedule C.” “Enter your statutory employee income from box 1 of Form W-2 on line 1 of Schedule C and check the box on that line.”
On tax, the instructions add: “Social security and Medicare tax should have been withheld from your earnings; as a result, you do not owe” self-employment “tax on these earnings.” They list who this covers: “Statutory employees include” full-time life insurance agents, certain agent or commission drivers and traveling salespersons, and certain homeworkers. If you also had ordinary self-employment income, the instructions say “you must file two Schedules C.” “You cannot combine these amounts on a single Schedule C.”
Where it goes next
The first stop is line 3, whose caption is “Subtract line 2 from line 1”. Line 3 and the lines after it are described on the Schedule C lines 2 to 5 page, and the rest of the income part is on the Schedule C lines 6 and 7 page. The instructions also note that what you report here may affect a later deduction: “Income you report on Schedule C may be qualified business income and entitle you to a deduction on Form 1040 or 1040-SR, line 13a.” See the Form 1040 line 13 page for that deduction.
This line is one step in a chain that ends at line 31. For a profit, the schedule says “If a profit, enter on both Schedule 1 (Form 1040), line 3, and on Schedule SE, line 2.” Schedule SE is the form that figures self-employment tax; it is introduced on the Schedule SE (Form 1040) page. The last step is covered on the Schedule C lines 31 and 32 page, and the return the schedule attaches to is explained on the Form 1040 page.
Edition and line numbers
This page reads the 2025 Schedule C (Form 1040) and its 2025 instructions, the current files irs.gov served on 2026-10-18 (byte-identical to the archived copies). They are the files for the tax year 2025 return, filed in 2026. The schedule says “Attach to Form 1040, 1040-SR, 1040-SS, 1040-NR, or 1041”. Check the tax year printed on the schedule you are filling in and use the line numbers on that year’s schedule, because a different year’s schedule can number or word its lines differently.
Common mistakes
- Reporting only what appeared on Forms 1099. The instructions tell you to “report all income attributable to your trade or business from all sources.”
- Entering less than the Form 1099-NEC total without explaining it. The instructions say “attach a statement explaining the difference.”
- Mixing statutory employee wages with other business income on one schedule. The instructions say “You cannot combine these amounts on a single Schedule C.”
Related: Schedule C (Form 1040), Form 1099-NEC box 1, Form 1099-K box 1a, self-employment tax, and Form 1040 line 13.
Sources
- Instructions for Schedule C (Form 1040), Profit or Loss From Business (2025): https://www.irs.gov/pub/irs-pdf/i1040sc.pdf
- Schedule C (Form 1040), Profit or Loss From Business (2025): https://www.irs.gov/pub/irs-pdf/f1040sc.pdf
Read from the IRS documents linked above on October 18, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the account provider or the IRS is the right place to confirm anything consequential.