Private Foundation Rules Explained: What Nonprofit Founders Need to Know

What Is a Private Foundation?

A private foundation is a type of 501(c)(3) nonprofit organization — but it's very different from the public charities most people picture when they think of nonprofits. Private foundations are typically funded by a single source: an individual, a family, or a corporation. Rather than raising money from the general public, they use that funding to support charitable activities, often by making grants to other organizations.

Think of well-known examples like the Bill & Melinda Gates Foundation or the Ford Foundation. These are large private foundations, but the structure is available to anyone who wants to create a lasting philanthropic legacy — even on a much smaller scale.

If you're a nonprofit founder exploring your options, understanding private foundation rules is essential. The IRS applies a distinct and demanding set of requirements to these organizations, and failing to comply can result in significant excise taxes.

Private Foundation vs. Public Charity: What's the Difference?

Before diving into the rules, it's worth clarifying the distinction between a private foundation and a public charity — because the two are often confused.

A public charity receives broad financial support from the public, the government, or a wide range of donors. Examples include hospitals, schools, churches, and most community nonprofits.

A private foundation, by contrast, typically has a narrow funding base — usually one person, family, or corporation — and does not rely on public fundraising. Because private foundations have concentrated control and less public accountability, the IRS subjects them to stricter oversight.

| Feature | Public Charity | Private Foundation | |---|---|---| | Funding source | Broad public support | Single donor / family / corporation | | IRS scrutiny | Standard 501(c)(3) rules | Additional excise tax rules | | Donor deductibility | Up to 60% of AGI | Up to 30% of AGI | | Required distributions | None | 5% of assets annually | | Governance | Board with independent members | More control by founders |

If your organization doesn't meet the public support test — generally requiring at least one-third of its funding from the public — the IRS will automatically classify it as a private foundation.

How Private Foundations Work

Private foundations operate by receiving contributions (usually from their founders), investing those assets, and then using the income and a portion of the principal to fund charitable work. That work typically takes one of two forms:

• **Grantmaking** — Giving money to other nonprofits, researchers, or individuals to advance charitable goals
• **Direct charitable activity** — Running programs or initiatives directly (sometimes called an "operating foundation")

Most private foundations are grantmakers. They review grant applications, award funding, and monitor how recipients use those funds. A smaller number are "private operating foundations," which actively conduct their own charitable programs rather than primarily distributing grants.

Either way, private foundations must navigate a specific set of IRS rules designed to prevent abuse, ensure charitable funds are actually used for their intended purpose, and maintain public trust.

Private Foundation IRS Rules: What You Need to Know

The IRS imposes several categories of rules on private foundations under Chapter 42 of the Internal Revenue Code. Here's a breakdown of the key requirements every founder should understand.

The 5 Percent Distribution Requirement

One of the most important private foundation rules is the mandatory distribution requirement. Each year, a private foundation must distribute at least 5% of the fair market value of its investment assets for charitable purposes.

This is sometimes called the "5 percent rule" or "qualifying distributions" requirement. Qualifying distributions include:

• Grants to public charities or individuals
• Reasonable administrative expenses related to charitable activities
• Amounts paid to acquire assets used directly for charitable purposes

If a foundation fails to make the required distributions in a given year, it faces a 30% excise tax on the undistributed amount — and if the shortfall isn't corrected, an additional 100% tax applies.

The Excise Tax on Investment Income

Private foundations pay a 1.39% excise tax on their net investment income each year. This includes interest, dividends, rents, royalties, and capital gains. While this rate is relatively modest, it's a compliance obligation that public charities don't face.

The tax is reported and paid using IRS Form 990-PF, which is the annual return required of all private foundations.

Self-Dealing Rules

Self-dealing is one of the most heavily enforced areas of private foundation compliance — and one of the most misunderstood.

The self-dealing rules prohibit certain financial transactions between a private foundation and its disqualified persons. Disqualified persons include:

• Substantial contributors (those who have donated more than $5,000 or 2% of total contributions)
• Foundation managers (officers, directors, trustees)
• Family members of the above
• Corporations, partnerships, or trusts in which disqualified persons hold a significant interest

Prohibited self-dealing transactions include:

• Selling, leasing, or exchanging property between the foundation and a disqualified person
• Lending money or extending credit to a disqualified person
• Paying compensation to a disqualified person that is not reasonable and necessary
• Using foundation assets for the personal benefit of a disqualified person
• Paying government officials

Even well-intentioned transactions can trigger self-dealing penalties. For example, if a foundation founder loans money to the foundation — even at a fair interest rate — that's likely a prohibited act of self-dealing.

Penalties for self-dealing are steep: 10% of the transaction amount is imposed on the disqualified person, and foundation managers who knowingly participated can face a 5% penalty as well.

Excess Business Holdings Rules

A private foundation generally cannot own more than 20% of the voting stock of a business enterprise (reduced to 2% in some cases). This rule is designed to prevent foundations from being used to control business empires under the guise of charity. Learn more about excess business holdings rules on the IRS website.

If a foundation has excess business holdings, it must divest the excess within a certain period — typically five years — or face an excise tax.

Jeopardizing Investment Rules

Private foundations are prohibited from making investments that would jeopardize the foundation's ability to carry out its exempt purposes. This is a broad prohibition against risky or speculative investments that could threaten the foundation's asset base.

Examples of potentially jeopardizing investments include trading in commodity futures, buying puts and calls, margin trading, and investments in companies without a proven track record.

Foundation managers who authorize jeopardizing investments can face a 10% excise tax on the investment amount.

Taxable Expenditures Rules

Not every grant or payment a private foundation makes is automatically acceptable. The taxable expenditure rules prohibit foundations from spending money on:

• Political campaign activities
• Voter registration drives (unless they meet specific neutrality requirements)
• Grants to individuals (unless the foundation follows approved procedures)
• Grants to non-501(c)(3) organizations (unless the foundation exercises "expenditure responsibility")
• Activities that carry out non-charitable purposes

Foundations that make taxable expenditures face a 20% excise tax on the amount spent, with an additional 5% penalty on managers who approved the spending.

Private Foundation Compliance Requirements: Ongoing Obligations

Beyond avoiding prohibited transactions, private foundations have a range of ongoing compliance responsibilities.

Annual Filing: Form 990-PF

All private foundations — regardless of size — must file IRS Form 990-PF every year. This is the most comprehensive of all nonprofit tax returns. It requires foundations to report:

• Financial statements (assets, liabilities, income, expenses)
• A list of all grants and contributions made
• All officers, directors, trustees, and highly compensated employees
• Investment activities and income
• Compliance with the distribution requirement

Form 990-PF is a public document, meaning anyone can review it. Transparency is not optional for private foundations.

State Reporting Requirements

In addition to federal requirements, most states require private foundations to register with a state charity regulator and file annual reports. Requirements vary significantly by state, so it's important to confirm what's required in your state of organization and every state where you solicit funds.

Record-Keeping and Governance

Private foundations should maintain thorough records of board meetings, grant decisions, investment policies, and all financial transactions. Good governance isn't just a best practice — it's a defense against penalties if the IRS ever questions a transaction.

Foundations should also adopt written policies for:

• Conflict of interest
• Investment management
• Grantmaking procedures
• Whistleblower protection
• Document retention

Can a Private Foundation Pay Its Founder or Family Members?

Yes — but carefully. The self-dealing rules don't prohibit all compensation to disqualified persons. A private foundation can pay reasonable compensation to a founder, family member, or other disqualified person for services that are necessary to carry out the foundation's exempt purposes.

The key word is "reasonable." Compensation must reflect what a similarly qualified person would receive for similar services in the same geographic area. Excessive compensation is treated as self-dealing, even if the foundation's board approved it.

This is an area where many new foundations run into trouble. Before paying any disqualified person, document why the services are necessary, how you determined the compensation is reasonable, and who on the board approved it.

Is a Private Foundation Right for You?

A private foundation is a powerful tool for long-term philanthropy, but it's not the right structure for every nonprofit mission. Consider a private foundation if:

• You have a significant source of funding from an individual, family, or corporation
• You want maximum control over how charitable funds are used
• You want to build a lasting institutional legacy
• You are comfortable with ongoing compliance obligations and IRS oversight

If your goal is to build a community organization, run programs, or rely on broad public fundraising, a public charity structure will likely serve you better — and come with fewer compliance burdens.

Beacon Nonprofit makes it easier to understand your options and get your organization off the ground the right way. Whether you're exploring a private foundation, a public charity, or another nonprofit structure, our team can guide you through the formation process and help you stay compliant from day one.