Business owners have several options from which to choose when selecting a structure for their business. A sole proprietorship is an unincorporated entity that does not exist apart from its sole owner . A partnership is two or more people agreeing to operate a business for profit. A corporation is a legal entity -- a "person" in the eyes of the law -- existing separate and apart from its owners. Ease of formation, management, protection from personal liability and taxation are some factors business owners should consider in choosing a business structure.