The Internal Revenue Code allows for two different levels of corporate tax treatment. Subchapters C and S of the code define the rules for applying corporate taxes. Subchapter C corporations include most large, publicly-held businesses. These corporations face double taxation on their profits if they pay dividends: C corporations file their own tax returns and pay taxes on profits before paying dividends to shareholders, which are subsequently taxed on the shareholders' individual returns. Subchapter S corporations meet certain requirements that allow the business to insulate shareholders from corporate debts but avoid the double taxation imposed by subchapter C. In order to qualify for subchapter S treatment, corporations must meet the following criteria:
- Must be domestic
- Must not be affiliated with a larger corporate group
- Must have no more than one hundred shareholders
- Must have only one class of stock
- Must not have any corporate or partnership shareholders
- Must not have any nonresident alien shareholders.
Additionally, after a business is incorporated, all shareholders must agree to subchapter S treatment prior to electing that option with the Internal Revenue Service.