Sole Proprietorship

A sole proprietorship is an unincorporated business owned and operated by a single individual, with no legal distinction between the owner and the business. The owner receives all profits, assumes all debts, and bears full personal liability for the business’s obligations. It is the simplest business structure in the United States and requires no state registration to form.

How a sole proprietorship works

A sole proprietorship exists automatically the moment a person begins operating independently. No formation document, registration fee, or state filing is required.

All business income and losses go on the owner's personal tax return using Schedule C (Form 1040). The owner also pays self-employment tax on net earnings, which covers both the employer and employee portions of Social Security and Medicare taxes.

No formal entity registration is required, but a sole proprietor may still need a business license or permit depending on industry and location.

Key characteristics

A sole proprietorship has several defining features that set it apart from other business structures.

• Single ownership. One person owns and controls the business with no partners, shareholders, or members.
• Pass-through taxation. Business income flows directly to the owner's personal return. The owner files no separate business tax return.
• No liability protection. Because the owner and the business are legally the same, personal assets remain at risk from business debts and lawsuits.
• Ease of formation and dissolution. Starting or dissolving a sole proprietorship requires no formal paperwork, unlike an LLC or corporation.
• Limited access to capital. Sole proprietors cannot issue stock or bring in equity investors. Funding typically relies on personal savings or loans.

Sole proprietorship vs. single-member LLC

A single-member LLC and a sole proprietorship both have one owner and use pass-through taxation by default. The critical difference is liability protection. A single-member LLC is a separate legal entity that generally shields the owner's personal assets from business debts and lawsuits. A sole proprietorship provides no such separation.

Sole proprietorship vs. DBA

A "doing business as" (DBA) name is not a business structure. It allows a sole proprietor to operate under a name other than their legal name, but it does not change the legal structure or create any liability protection. A sole proprietorship with a DBA is still a sole proprietorship.

Related terms

A sole proprietorship connects to several other business and tax concepts.

• Single-member LLC: A one-owner entity that provides liability protection a sole proprietorship doesn’t offer.
• Business license: A business license authorizes a business to operate legally within a specific city, county, state, or industry.
• Direct ownership in business: It means a person or business owns an asset outright in its own name rather than through another entity or intermediary.
• Dissolution in business: Dissolution of a business is the legal process of officially closing a business and ending its operations.

FAQs about a sole proprietorship

Can a sole proprietorship have employees?

Yes. A sole proprietorship can have employees, but doing so adds payroll tax obligations and requires the owner to obtain an Employer Identification Number (EIN) from the IRS. Because no legal separation exists between the owner and the business, the owner also bears personal responsibility for employment-related claims.

When does it make sense to convert to an LLC?

Conversion makes the most sense when business exposure to lawsuits, debt, or contracts has grown to a point where a judgment could meaningfully threaten the owner's personal finances. Owners who take on employees, enter into significant contracts, or operate in higher-risk industries often find the liability protection of an LLC worth the additional administrative requirements.

Does a sole proprietor need an EIN?

A sole proprietor with no employees can generally use their Social Security number as the business tax ID. A sole proprietor who hires employees, however, must obtain an EIN. Even without employees, getting a free EIN from the IRS is worthwhile to avoid sharing a Social Security number on client or vendor forms.