In a general sense, a corporation is a business entity that is given many of the same legal rights as an actual person. Corporations may be made up of a single person or a group of people, known as sole corporations or aggregate corporations, respectively.
Corporations exist as virtual or fictitious persons, granting a limited protection to the actual people involved in the business of the corporation. This limitation of liability is one of the many advantages to incorporation, and is a major draw for smaller businesses to incorporate; particularly those involved in highly litigated trade.
A company is incorporated in a specific nation, often within the bounds of a smaller subset of that nation, such as a state or province. The corporation is then governed by the laws of incorporation in that state.
A corporation may issue stock, either private or public, or may be classified as a non-stock corporation. If stock is issued, the corporation will usually be governed by its shareholders, either directly or indirectly. The most common model is a board of directors which makes all major decisions for the corporation, in theory serving the best interests of the individual shareholders.
In the United States there are three major types of corporations: Close, C, and S.
Close corporations issue stock, but the amount of shareholders is greatly limited, usually to less than thirty. Given the small number of shareholders, normally all are involved in board-level decision making. Transfer and sale of stock is also tightly controlled.
C corporations are the most common type of corporation in the United States. They allow for theoretically unlimited amounts of stock to be issued, and usually have a smaller board of directors which make decisions. C corporations pay taxes both at the corporate level, and at the personal level, as shareholders pay taxes on their dividends.
S corporations are virtually identical to C corporations, save that they have a special tax status with the IRS. Instead of paying taxes at both levels, S corporations are required only to tax their dividends--the corporation itself does not need to pay taxes.
While many people in the United States choose to incorporate in their own state--small businesses especially--some states have corporate charters that are particularly beneficial to certain types of business. Nevada, for example, does not require ownership records that attach names, making it ideal for corporations interested in protecting the private identities of their owners.
A number of books and websites have sprung up in recent years to aid small businesses to incorporate. There are two major benefits for most small businesses. The first is the substantial legal and fiscal protection in the event of litigation or bankruptcy. The second is a potentially uninterrupted, essentially infinite lifespan for the business. This is contrasted with a sole proprietorship, which may experience problems and complications should the owner die, while a corporation allows for the seamless passing on of the business.