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SESK: Stuff Everyone Should Know · sesk.info/biz-schedule-c-sole-prop

Which IRS form does a sole proprietor use to report business profit or loss?

Schedule C, filed with the owner's personal Form 1040.

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  1. Form W-2
  2. Schedule C (Form 1040) ✔
  3. Form 1120

Why: A sole proprietor reports business income and expenses on Schedule C, attached to their own Form 1040. There is no separate business income tax return. Form 1120 is for C corporations, and a W-2 reports an employee's wages.

Huh, didn't know that: The IRS says an activity counts as a business if your main purpose is profit and you do it with continuity and regularity.

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Why did the sole proprietor bring a ladder to tax time? To reach Schedule C level.
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References

Answer: Schedule C (Form 1040). A sole proprietor reports business income and expenses on Schedule C, attached to their own Form 1040. There is no separate business income tax return. Form 1120 is for C corporations, and a W-2 reports an employee's wages.

  1. IRS: About Schedule C (Form 1040) www.irs.gov/forms-pubs/about-schedule-c-form-1040
    Use Schedule C (Form 1040) to report income or loss from a business you operated or a profession you practiced as a sole proprietor.
    Checked 2026-10-11.

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