A private foundation is any domestic or foreign organization described in section 501(c)(3) of the Internal Revenue Code except for an organization referred to in section 509(a)(1), (2), (3), or (4). In effect, the definition divides section 501(c)(3) organizations into two classes: private foundations and public charities.

Generally, organizations that are classified as public charities are those that:

  • Are churches, hospitals, qualified medical research organizations affiliated with hospitals, schools, colleges and universities,
  • Have an active program of fundraising and receive contributions from many sources, including the general public, governmental agencies, corporations, private foundations or other public charities,
  • Receive income from the conduct of activities in furtherance of the organization's exempt purposes, or
  • Actively function in a supporting relationship to one or more existing public charities.

Private foundations, in contrast, typically have a single major source of funding (usually gifts from one family or corporation rather than funding from many sources) and most have as their primary activity the making of grants to other charitable organizations and to individuals, rather than the direct operation of charitable programs.

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