Private Foundation Excise Taxes: IRC 4940-4945 Compliance, Self-Dealing, and Minimum Distribution

Every 501(c)(3) organization is either a public charity or a private foundation, and the distinction carries serious tax consequences. Public charities face relatively light ongoing compliance. Private foundations operate under a parallel set of excise taxes spanning IRC 4940 through IRC 4945, covering investment income, transactions with insiders, payout requirements, business holdings, investment prudence, and grant-making. These taxes are not optional penalties for bad behavior; several apply automatically, regardless of intent, and the correction taxes (sometimes called “second-tier” taxes) are punitive by design.

What makes an organization a private foundation?

Under IRC 509(a), every 501(c)(3) organization is a private foundation unless it proves otherwise. Public charity status requires meeting one of several tests: the organization receives substantial support from the general public or governmental sources (the public support test under IRC 509(a)(1)); it receives more than one-third of its support from gifts, grants, and related gross receipts and not more than one-third from investment income (IRC 509(a)(2)); or it operates exclusively to support one or more public charities (IRC 509(a)(3)).

Most private foundations are funded by a single donor, a family, or a small group. The classic example is a family foundation: a wealthy individual contributes assets to a 501(c)(3) that the individual and family members control. Because funding comes from one source rather than a broad public base, it fails the public support test and is classified as a private foundation. That classification triggers all six excise taxes below.

The distinction matters at the 501(c)(3) application stage. The IRS determination letter classifies the organization as either a public charity or a private foundation, and the classification drives ongoing compliance.

What’s the excise tax on net investment income?

IRC 4940 imposes a flat 1.39% tax on a private foundation’s net investment income. This is not a penalty; it applies to every domestic private foundation annually, regardless of compliance with the other excise tax rules. The rate was reduced from 2% to 1.39% by the Taxpayer Certainty and Disaster Tax Relief Act of 2019. The old two-tier system, which allowed a 1% rate for foundations that increased their payout, was eliminated.

Net investment income includes interest, dividends, rents, royalties, and net capital gains from asset sales. It does not include program-related investment income. Expenses directly connected with producing investment income (management fees, custodial fees, allocable legal and accounting fees) reduce the base. Capital losses offset capital gains in the current year but cannot create a net capital loss that reduces other investment income. The foundation computes the tax on Part VI of Form 990-PF.

What’s self-dealing under IRC 4941?

IRC 4941 prohibits virtually all financial transactions between a private foundation and its “disqualified persons.” Under IRC 4946, disqualified persons include substantial contributors (anyone who gave more than $5,000 if the amount exceeds 2% of total contributions), foundation managers (officers, directors, trustees), owners of more than 20% of a substantial contributor entity, family members (spouses, ancestors, lineal descendants) of any of the above, and entities in which these persons hold more than 35%.

The prohibited transactions are:

• Sale, exchange, or leasing of property between the foundation and a disqualified person, in either direction, regardless of price.
• Lending of money or extensions of credit in either direction (interest-free loans from a disqualified person to the foundation are permitted).
• Furnishing of goods, services, or facilities, unless made available to the general public on the same terms or provided to the foundation without charge.
• Payment of compensation to a disqualified person, unless it is reasonable compensation for personal services necessary to carry out the foundation’s exempt purposes.
• Transfer to, or use by or for the benefit of, a disqualified person of the foundation’s income or assets, a catch-all that reaches indirect self-dealing.

The initial tax is 10% of the amount involved, imposed on the disqualified person for each year the act remains uncorrected. The foundation manager who knowingly participates pays 5% (capped at $20,000 per act). If not corrected, a second-tier tax of 200% hits the disqualified person. Intent, fairness, and arm’s-length pricing are all irrelevant. The transaction is either prohibited or it is not.

What’s the minimum distribution requirement under IRC 4942?

IRC 4942 requires every nonoperating private foundation to distribute at least 5% of the average fair market value of its non-charitable-use assets each year for charitable purposes. The requirement exists to prevent foundations from accumulating wealth indefinitely without funding the charitable purposes that justify their exemption.

The calculation has three steps. First, determine the FMV of all assets not used directly in carrying out the exempt purpose (investment assets: stocks, bonds, investment real estate, cash). Value these monthly and compute a 12-month average. Second, multiply by 5% to get the “distributable amount.” Third, make “qualifying distributions” (grants to public charities, direct charitable expenditures, program-related investments, reasonable administrative expenses) equal to or exceeding that amount before the end of the following tax year. The IRC 4940 excise tax paid reduces the distributable amount.

If the foundation falls short, the initial tax is 30% of the undistributed income. If still uncorrected after the “taxable period,” a second-tier tax of 100% applies.

What are excess business holdings under IRC 4943?

IRC 4943 limits the combined ownership that a private foundation and its disqualified persons can hold in a business enterprise. The general rule: combined holdings cannot exceed 20% of the voting stock (or profits interest for a partnership). If a third party controls the enterprise (holding 35% or more), the limit relaxes to 35%.

The initial tax is 10% of the value of excess holdings for each year the excess exists. If not disposed of within the taxable period, a 200% second-tier tax applies.

The rule targets active business enterprises, not passive portfolio investments. It does not apply to functionally related businesses (substantially related to the foundation’s exempt purpose) or program-related investments. When a foundation receives excess holdings by gift or bequest, it generally has five years to divest (with a possible five-year extension), and the initial tax does not apply during that period.

What are jeopardizing investments under IRC 4944?

IRC 4944 taxes investments that jeopardize the foundation’s ability to carry out its exempt purposes. The standard is whether foundation managers failed to exercise ordinary business care and prudence when making the investment, evaluated in the context of the entire portfolio.

Investments flagged as potentially jeopardizing include margin trading, commodity futures, working interests in oil and gas wells, and options strategies. Diversified portfolios of publicly traded securities, government bonds, and real estate are generally safe.

The initial tax is 10% on the foundation and 10% on the manager who made the investment knowingly (capped at $10,000). The second-tier tax is 25% on the foundation and 5% on the manager (capped at $20,000). Correction means removing the investment from jeopardy. Program-related investments are exempt from these rules even if they would otherwise fail the prudence standard.

What are taxable expenditures under IRC 4945?

IRC 4945 covers five categories of prohibited spending:

Lobbying. Expenditures to influence legislation are prohibited (except making nonpartisan analysis available). This is stricter than the rules for public charities under IRC 501(h). A public charity receiving a foundation grant may lobby, as long as the grant is not earmarked for that purpose.

Electioneering. Any expenditure to influence a public election, including candidate contributions and partisan voter registration drives.

Grants to individuals without IRS-approved procedures. Scholarships, fellowships, and prizes require advance IRS approval of the selection and reporting procedures.

Grants to non-public-charities without expenditure responsibility. Grants to another private foundation, a foreign charity, or a non-501(c)(3) require the foundation to exercise expenditure responsibility under IRC 4945(h): pre-grant inquiry, a written grant agreement, annual grantee reports, and reporting on Form 990-PF.

Any expenditure for a non-charitable purpose. The catch-all covers excessive compensation, unreasonable travel, and personal expenses by foundation managers.

The initial tax is 20% on the foundation and 5% on the knowing manager (capped at $10,000). The second-tier tax is 100% on the foundation and 50% on the manager (capped at $20,000).

How does Form 990-PF report all of this?

Every private foundation files Form 990-PF annually, functioning as both an information return and a tax return for the IRC 4940 excise tax.

• Part I reports revenue and expenses.
• Part IV reports the balance sheet, including FMV of assets (feeding the minimum distribution calculation).
• Part VI calculates the 1.39% excise tax on net investment income.
• Parts X, XI, XII compute the minimum investment return, qualifying distributions, and undistributed income.
• Part XV lists all grants paid and contributions received.
• Supplemental schedules cover self-dealing, excess business holdings, jeopardizing investments, and taxable expenditures.

The return is due on the 15th day of the 5th month after year-end (May 15 for calendar-year foundations), with a six-month extension available. Estimated tax payments are required if the foundation expects to owe $500 or more in excise tax.

What should I do next?

If you operate a private foundation, annual compliance review covering all six excise tax categories is not optional. Map every transaction between the foundation and its disqualified persons for self-dealing. Confirm that qualifying distributions meet or exceed 5% of average FMV of non-charitable-use assets. Aggregate the foundation’s ownership interests with those of all disqualified persons for excess business holdings. Evaluate portfolio composition for jeopardizing investments. Confirm that every grant has a written agreement and that grants to non-public charities include expenditure responsibility.

• Nonprofit 501(c)(3) application and Form 1023, the initial classification decision (public charity vs private foundation) and how it shapes ongoing compliance
• Nonprofit board governance and compensation, the conflict-of-interest policies that prevent self-dealing before it starts
• Nonprofit Form 990 filing guide, the parallel information return for public charities and how Form 990-PF differs
• Nonprofit grant management and restricted funds, expenditure responsibility and grant agreement requirements for foundations making grants to non-public charities
• Nonprofit fiscal sponsorship, how a private foundation’s grants to a fiscal sponsor trigger expenditure responsibility

Related guides:

• Nonprofit Donor Acknowledgment Contribution Substantiation
• Nonprofit Employee Retention Credit Erc Eligibility
• Nonprofit Employee Vs Contractor Classification
• Nonprofit Executive Compensation Form 990 Excess Benefit
• Nonprofit Fiscal Sponsorship Tax Deductible Donations

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.