There are 29 types of 501(c) organizations, with the most common being 501(c)(3), (c)(4), (c)(6), and (c)(7) organizations. While each exemption type is unique, it’s not uncommon for a nonprofit to fit into more than one type of 501(c). In those cases, it is important to weigh the pros and cons of each type of 501(c) the organization may qualify for to determine which best fits the nonprofit’s goals and activities.