Articles · Basics · Individual Income Tax and Form 1040
Schedule C Basics for Sole Proprietors
Schedule C reports the profit or loss of a business run as a sole proprietorship. A single-member LLC is generally reported the same way unless it elects otherwise.
What goes on the form
Schedule C starts with gross receipts and subtracts returns and cost of goods sold. It then lists operating expenses such as advertising, insurance, office costs, travel, and professional fees.
Section 162 allows expenses that are ordinary and necessary for the business. Personal costs are not deductible, and mixed-use items such as a phone must be split.
How it connects to the return
The net profit flows to Schedule 1 and, usually, to Schedule SE for self-employment tax. A profit may also qualify for the qualified business income deduction.
Common mistakes
Frequent errors include missing Forms 1099 from income, deducting personal expenses, claiming vehicle use without a mileage log, and failing to make estimated payments.
Repeated losses can also raise a question about whether the activity is a business or a hobby. The answer depends on facts such as whether it is run in a businesslike way with an intent to make a profit.
Key takeaways
- Schedule C reports sole proprietor profit or loss.
- Expenses must be ordinary and necessary.
- Records and mileage logs support deductions.
For general education only, not tax advice. Tax law changes often, so confirm current rules and amounts with primary sources.