An S corporation (sometimes referred to as an S Corp) is a special type of corporation created through an IRS tax election. An eligible domestic corporation can avoid double taxation (once to the corporation and again to the shareholders) by electing to be treated as an S corporation.
An S corp is a corporation with the Subchapter S designation from the IRS. To be considered an S corp, you must first charter a business as a corporation in the state where it is headquartered. According to the IRS, S corporations are “considered by law to be a unique entity, separate and apart from those who own it.” This limits the financial liability for which you (the owner, or “shareholder”) are responsible. Nevertheless, liability protection is limited – S corps do not necessarily shield you from all litigation such as an employee’s tort actions as a result of a workplace incident.
What makes the S corp different from a traditional corporation (C corp) is that profits and losses can pass through to the your personal tax return. Consequently, the business is not taxed itself. Only the shareholders are taxed. There is an important caveat, however: any shareholder who works for the company must pay him or herself “reasonable compensation.” Basically, the shareholder must be paid fair market value, or the IRS might reclassify any additional corporate earnings as “wages.”