Historical microdata files based on Forms 990
and Forms 990-EZ sampled for the annual studies of nonprofit charitable and
other tax-exempt organizations are now available. Annual data are available for
organizations exempt from income tax under Internal Revenue Code Section
501(c)(3). Additional data for tax-exempt organizations under IRC Sections
501(c)(4) through 501(c)(9) are available for limited tax years.
SOI Tax Stats - Charities & Other Tax-Exempt Organizations Statistics