What Is Form 990-PF? Private Foundation Filing, Excise Tax, and Payouts

Form 990-PF is the annual tax return that every private foundation files with the IRS. It reports investment income, charitable distributions, officer and trustee compensation, and compliance with the excise tax rules that apply specifically to private foundations. Certain nonexempt charitable trusts treated as private foundations file it too. The form is how the IRS checks whether a foundation is actually paying money out for charitable purposes or just parking tax-advantaged wealth, and mistakes on it can trigger penalties that accrue by the day.

Who Has to File

Three categories of organizations file this return every year: tax-exempt private foundations recognized under Section 501(a), taxable private foundations, and nonexempt charitable trusts treated as private foundations under Section 4947(a)(1) of the Internal Revenue Code.¹ For that last group, the 990-PF also substitutes for Form 1041 when the trust has no taxable income.²

Private foundations generally split into two types. A private operating foundation spends at least 85% of its income directly on charitable activities it runs itself. A nonoperating foundation, the more common form, primarily makes grants to other organizations.¹ Both types file the 990-PF. The typical example is a foundation funded by a single family, individual, or corporation, without the broad public support base of a public charity.

Size doesn’t matter here. Private foundations cannot use the shorter Form 990 or Form 990-EZ regardless of how small they are. A foundation with $50,000 in assets still files the full 990-PF.³

What the Form Reports

The 990-PF is a detailed financial picture of the foundation’s year. Part I asks for a full analysis of revenue and expenses, including every capital gain and loss realized during the tax year, along with all contributions, gifts, and grants paid out. Each grant has to identify the recipient by name, address, and organizational status, and disclose any family or employment relationship between the recipient and anyone connected to the foundation.⁴

Part VII covers the people running the organization. The foundation lists every officer, director, trustee, and foundation manager, paid or unpaid, along with their addresses. For anyone paid, the form breaks out salary, fees, bonuses, and severance.⁴ The IRS uses this data to flag compensation that looks excessive relative to the foundation’s size and mission.

Excise Tax on Investment Income

Private foundations pay an excise tax on their net investment income at a flat rate of 1.39%.⁵ Net investment income includes interest, dividends, rents, royalties, and capital gains, minus the expenses directly connected to earning that income. Parts I and IV of the form walk through this calculation. The single 1.39% rate applies to tax years beginning after December 2019 and applies to every exempt private foundation regardless of size.

The 5% Distribution Requirement

Private nonoperating foundations must distribute at least 5% of the average fair market value of their non-charitable-use assets each year.⁶ Non-charitable-use assets are the assets not being used directly for charitable purposes, such as an investment portfolio. Assets used in running programs, like a building where the foundation operates a soup kitchen, don’t count toward the base.

Qualifying distributions aren’t limited to grants. Program-related investments and reasonable administrative expenses paid to carry out charitable purposes also count.⁷ Staff salaries for people doing program work can qualify. General overhead that isn’t tied to charitable activity does not.

A foundation that falls short of the 5% minimum faces an initial excise tax of 30% on the undistributed amount.⁶ Private operating foundations are exempt from this distribution requirement because they already spend directly on charitable activities by definition.

Prohibited Transactions the Form Flags

The 990-PF also asks the foundation to disclose whether it engaged in activities that trigger separate excise taxes. These rules are how Congress prevents insiders from using a foundation as a personal piggy bank.

Self-Dealing

A private foundation cannot engage in most financial transactions with its “disqualified persons,” a category that includes substantial contributors, foundation managers, their family members, and entities they control.⁸ Prohibited transactions include selling or leasing property to or from the foundation, lending money, providing goods or services, and transferring foundation income or assets to a disqualified person.⁹ Paying a manager’s personal expenses out of foundation funds counts. Reasonable compensation for legitimate services is one of the narrow exceptions.

Taxable Expenditures

Foundations face spending restrictions that public charities don’t. Money spent to influence legislation, whether by lobbying lawmakers directly or through public campaigns, is a taxable expenditure.¹⁰ So are grants to individuals for travel or study unless the foundation follows a pre-approved selection process, and grants to organizations that aren’t public charities unless the foundation exercises “expenditure responsibility,” which means tracking how the money is used and reporting back to the IRS.

Excess Business Holdings

A private foundation generally cannot own more than 20% of the voting stock in a business, reduced by whatever percentage disqualified persons own. The 20% cap increases to 35% when a third party who isn’t a disqualified person has effective control of the business.¹¹

Jeopardizing Investments

If a foundation invests in a way that jeopardizes its ability to carry out its charitable mission, with highly speculative ventures the classic example, both the foundation and any manager who knowingly participated face an initial 10% excise tax on the amount invested. If the investment isn’t removed from jeopardy after the IRS flags it, the foundation owes an additional 25% tax and the responsible manager owes 5%.¹²

When any of these prohibited transactions occur, the foundation reports them on Form 4720 in addition to the 990-PF. Form 4720 is where the excise taxes on self-dealing, undistributed income, excess holdings, jeopardizing investments, and taxable expenditures are calculated and paid.¹³

Public Disclosure

Private foundation returns are far more transparent than individual tax returns. Under Section 6104, a foundation’s annual 990-PF must be available for public inspection, and anyone can request a copy.¹⁴ Most returns end up on third-party databases shortly after filing.

The biggest difference from other nonprofit filings is donor transparency. Public charities can redact the names and addresses of their contributors on the publicly available version. Private foundations cannot; the statute specifically excludes private foundations from this protection.¹⁴ Anyone reading a foundation’s return can see who gave money and how much.

Deadline, Extension, and E-Filing

The 990-PF is due on the 15th day of the 5th month after the end of the foundation’s fiscal year. For a calendar-year foundation, that’s May 15.¹⁵ If that date falls on a weekend or holiday, the deadline shifts to the next business day.

Foundations that need more time can file Form 8868 for an automatic six-month extension, pushing a calendar-year deadline to November 15.¹⁶ The extension gives you more time to file, but not more time to pay. If you owe excise tax, estimate and pay it by the original due date to avoid interest.

All 990-PF returns must be filed electronically. The Taxpayer First Act, enacted in 2019, eliminated paper filing for tax-exempt organization returns for tax years beginning after July 1, 2019.¹⁷ The standard waiver process that applies to other information returns does not apply here.

Quarterly Estimated Payments

Foundations that expect to owe $500 or more in excise tax on investment income must make quarterly estimated payments during the year rather than waiting for the return.¹⁸ The IRS provides Form 990-W as a worksheet for calculating the installments.

The schedule differs slightly from the corporate estimated tax calendar. For a calendar-year foundation, the first installment is due May 15 (the 15th day of the 5th month), not the 4th month as with corporations. The remaining three payments follow the standard schedule: June 15, September 15, and December 15. Fiscal-year foundations adjust these dates accordingly.

Penalties for Late or Incomplete Returns

Missing the filing deadline or submitting an incomplete return triggers daily penalties. For most foundations, the penalty is $25 per day for each day the return remains unfiled or incomplete. Large organizations, defined as those with gross receipts exceeding roughly $1.3 million (the exact threshold is inflation-adjusted annually), face a daily penalty of $130.¹⁸

The maximum penalty per return caps at $13,000 for smaller foundations or $65,000 for large organizations, and in both cases the cap cannot exceed 5% of the foundation’s gross receipts for the year, whichever is less. The IRS can waive these penalties if the foundation shows reasonable cause for the delay.¹⁸

If the IRS sends a written demand for a delinquent return and the foundation still doesn’t comply, individual responsible persons face an additional $10 per day, up to $6,500 per return. That penalty hits the people in charge personally, not the foundation’s accounts.

The worst outcome is failing to file for three consecutive years. Under Section 6033(j), the IRS automatically revokes a foundation’s tax-exempt status on the due date of the third missed return.¹⁹ At that point the foundation becomes a taxable entity, and getting exempt status back means reapplying from scratch.

1
Internal Revenue Service. Instructions for Form 990-PF (2025) – General Instructions
2
Internal Revenue Service. About Form 990-PF, Return of Private Foundation or Section 4947(a)(1) Trust Treated as a Private Foundation
3
Internal Revenue Service. Form 990 Series – Which Forms Do Exempt Organizations File – Filing Phase In
4
Internal Revenue Service. 2025 Instructions for Form 990-PF – Specific Instructions
5
Office of the Law Revision Counsel. 26 U.S. Code 4940 – Excise Tax Based on Investment Income
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Office of the Law Revision Counsel. 26 USC 4942 – Taxes on Failure to Distribute Income
7
eCFR. 26 CFR 53.4942(a)-3 – Qualifying Distributions Defined
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Office of the Law Revision Counsel. 26 U.S. Code 4946 – Definitions and Special Rules
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Office of the Law Revision Counsel. 26 U.S. Code 4941 – Taxes on Self-Dealing
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Office of the Law Revision Counsel. 26 U.S. Code 4945 – Taxes on Taxable Expenditures
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Office of the Law Revision Counsel. 26 U.S. Code 4943 – Taxes on Excess Business Holdings
12
Office of the Law Revision Counsel. 26 U.S. Code 4944 – Taxes on Investments Which Jeopardize Charitable Purpose
13
Internal Revenue Service. Form 4720
14
Office of the Law Revision Counsel. 26 USC 6104 – Publicity of Information Required From Certain Exempt Organizations and Certain Trusts
15
Internal Revenue Service. Annual Exempt Organization Return – Due Date
16
Internal Revenue Service. Extension of Time to File Exempt Organization Returns
17
Internal Revenue Service. E-File for Charities and Nonprofits
18
Internal Revenue Service. 2025 Instructions for Form 990-PF
19
Internal Revenue Service. Automatic Revocation of Exemption