# What Is a Foundation? Private Foundations vs Public Charities *Published 2026-07-24* **Direct answer:** Every foundation is a nonprofit, but in tax law the key term is private foundation: a 501(c)(3) typically funded and controlled by a single family, individual, or company, as opposed to a public charity that draws broad public support. Private foundations face a stricter rulebook, including an excise tax on investment income, a minimum annual payout of roughly five percent of investment assets, self-dealing prohibitions, and the Form 990-PF return. > Every foundation is a nonprofit, but not every nonprofit is a foundation. The difference is where the money comes from, and it changes the rules entirely. A foundation is a nonprofit organization whose defining activity is money: holding an endowment and making grants, rather than running programs. The word has no fixed legal meaning by itself, plenty of organizations with "foundation" in the name are ordinary public charities, but in tax law the important term is private foundation, and the line between private foundations and public charities is one of the most consequential in the exempt sector. Private foundation vs public charity Both are 501(c)(3) organizations, as covered in our post on what 501(c)(3) means. The difference is support. A public charity draws broad support from the general public, government, or fees for exempt services, or qualifies automatically as a church, school, or hospital. A private foundation is typically funded and controlled by a single family, individual, or company. The IRS presumes every new 501(c)(3) is a private foundation unless it demonstrates public charity status, which is why the classification question appears in every exemption application. Why the classification matters Private foundations trade flexibility of funding for a stricter rulebook: an excise tax on net investment income, a minimum annual payout of roughly five percent of investment assets for charitable purposes, prohibitions on self-dealing with insiders that reach even ordinary-looking transactions, limits on business holdings, and lower deduction ceilings for donors. They also file their own annual return, Form 990-PF, regardless of size, unlike the tiered filing system described in our Form 990 guide. Public charities avoid most of this but must keep demonstrating public support over time. Kinds of foundations Within the foundation world, the working distinctions are operational. Independent and family foundations grant from an endowment. Corporate foundations channel company giving. Operating foundations, a hybrid category, run their own programs and follow modified rules. Community foundations, despite the name, are public charities: they pool gifts from many donors in a region, which is exactly what breaks the "private" classification. Starting a foundation Mechanically, starting a foundation follows the same sequence as any 501(c)(3): incorporate, obtain an EIN, adopt governance documents, and file Form 1023, with the classification analysis layered on top. The full sequence is in our guide on how to start a nonprofit. One practical note: grantmaking foundations that do not solicit the public often stay outside the state charitable registration net, but several states require registration of charitable assets, not just solicitation, New York being the clearest example. We sort out which states' filings a foundation actually needs as part of our nonprofit licensing practice, with per-state rules in the charitable registration hub. --- ## How to cite this page Cite as: "What Is a Foundation? Private Foundations vs Public Charities." Cornerstone Licensing. https://cornerstonelicensing.com/blog/foundation-vs-nonprofit Published by Cornerstone Licensing. When quoting figures or legal requirements, link the canonical URL above and note the last-updated date (2026-07-31). The full content index for this site is at https://cornerstonelicensing.com/llms.txt.