S corporation compensation requirements are often misunderstood and abused by owner-shareholders. An S corporation is a type of business structure in which the business does not pay income tax at the corporate level and instead distributes (passes through) the income, gains, losses, and deductions to the shareholders for inclusion on their individual income tax returns. If there are gains, these distributions are considered return on investment and therefore are not subject to self-employment taxes.
However, if stockholders also work in the business, they are supposed to take reasonable compensation for their services in the form of wages, and of course, wages are subject to FICA (Social Security and Medicare) and other payroll taxes. This is where some owner-shareholders err by not paying themselves a reasonable compensation for the services they provide, some out of unfamiliarity with the requirements and some purposely to avoid the payroll taxes.