A business owned and operated by one individual, with no legal distinction between the owner and the business. Income and losses are reported on the owner’s personal tax return (Schedule C).
Sole Proprietorship
A business entity with two or more owners who share profits, losses, and management responsibilities. Income is reported on Form 1065, and partners receive a Schedule K-1 to report their share on personal tax returns.
Partnership
A partnership where all partners share liability and management responsibilities. Each partner has unlimited personal liability for business debts.
General Partnership
A partnership with at least one general partner (who has unlimited liability) and one or more limited partners (who have liability limited to their investment).
Limited Partnership
A hybrid business structure that offers the limited liability of a corporation with the tax flexibility of a partnership or sole proprietorship. Income is typically reported on Schedule C for single-member LLCs or on Form 1065 for multi-member LLCs.
Limited Liability Company
A corporation that elects to pass corporate income, losses, deductions, and credits to shareholders for federal tax purposes. Avoids double taxation but must adhere to strict eligibility rules, including a limit of 100 shareholders.
S Corporation
A separate legal entity that pays corporate income tax on profits, with potential double taxation when dividends are distributed to shareholders. Taxed under Form 1120.
C Corporation
A tax levied on sole proprietors and partners to cover Social Security and Medicare, equivalent to the employer and employee portions of FICA taxes. Reported on Schedule SE.
Self-Employment Tax
A tax structure where business income is passed directly to owners and taxed at their individual income tax rates, avoiding corporate-level taxation. Applies to sole proprietorships, partnerships, LLCs, and S Corporations.
Pass-Through Taxation
A tax deduction of up to 20% on qualified pass-through business income under Section 199A, subject to income limitations and eligibility rules.
Qualified Business Income Deduction