Tax-exempt organizations - The IRS recognizes many types of tax-exempt organizations under various sections of the Internal Revenue Code. Here’s a list of common types, each categorized by their tax code section:501(c)(1): Corporations organized under Acts of Congress (e.g., Federal Credit Unions).501(c)(2): Title-holding corporations for exempt organizations.501(c)(3): Religious, charitable, educational, scientific, literary, public safety testing, amateur sports, and animal/child cruelty prevention organizations. (Most common charity type)501(c)(4): Civic leagues, social welfare organizations, and local employee associations.501(c)(5): Labor, agricultural, and horticultural organizations.501(c)(6): Business leagues, chambers of commerce, real estate boards.501(c)(7): Social and recreational clubs.501(c)(8): Fraternal beneficiary societies and associations.501(c)(9): Voluntary employees' beneficiary associations.501(c)(10): Domestic fraternal societies and associations.501(c)(12): Benevolent life insurance associations and mutual ditch, irrigation, telephone, or similar organizations.501(c)(13): Cemetery companies.501(c)(14): State-chartered credit unions and mutual reserve funds.501(c)(19): Veterans' organizations.521(a): Farmers' cooperative associations.527: Political organizations focused on political campaign activities.528: Homeowners associations (income from exempt functions).529: Qualified tuition programs (education savings plans). - These categories cover a wide range of nonprofit activities from charities and religious groups to labor unions, social clubs, and political organizations. Each type has specific rules regarding tax-exempt status, allowable activities, and reporting requirements. - For further details, more specialized types, and their legal definitions, refer to the IRS Publication 557 or the IRS website section on Types of Tax-Exempt Organizations