What is a sole proprietor? Upsolve Help August 19, 2018 19:05 A sole proprietor is someone who owns an unincorporated business by himself or herself. See definition here: https://www.irs.gov/businesses/small-businesses-self-employed/sole-proprietorships. Related articles I don't have my tax returns. Can I keep going? What is a luxury item and why does it matter for my Chapter 7 bankruptcy? What is the presumption of abuse in bankruptcy? Filing bankruptcy while self-employed What if I need to change my income/expenses, add more property, or add a creditor after I'm done with the questionnaire? Comments 0 comments Please sign in to leave a comment.