Federal rules: Form 990-PF, but no audit mandate
Every private foundation files Form 990-PF. It is due by the 15th day of the 5th month after year end. The Form 990-PF instructions do not require audited financial statements, and the Internal Revenue Code does not either.
The instructions do require foundation managers to send a copy of Form 990-PF to state Attorneys General where state law requires it. That includes the state of the principal office and the state of incorporation. Those states may have their own reporting rules.
When an audit is required anyway
- California. Gov. Code §12586(e) requires audited statements for charitable corporations and trustees that report to the Attorney General with gross revenue of $2,000,000 or more, excluding government grants and contracts that require an accounting. An audit committee is also required.
- Massachusetts. The Attorney General exempts private foundations that file Form 990-PF from its audit and review rule.
- New York and other states. Requirements depend on how the foundation is registered. Check with the state charities office. Our state audit threshold table covers the general rules.
- Banks and lenders. A credit line or loan agreement may require audited or reviewed statements.
- Donors and partners. Gift agreements, donor-advised arrangements or co-funders may ask for audited statements.
- Bylaws and board policy. Many foundations require an annual audit in their own governing documents.
Federal rules an auditor will look at
Excise tax on net investment income. Under IRC §4940, the rate is 1.39% for tax years beginning after December 20, 2019. The House proposed tiered rates in 2025, but the enacted law kept 1.39%.
Minimum distribution. A non-operating foundation must pay out its distributable amount. That starts with the minimum investment return: 5% of the fair market value of noncharitable-use assets, less acquisition debt. Uncorrected shortfalls face a 30% excise tax under §4942.
Self-dealing. Sales, leases, loans, providing goods or services, and paying compensation between the foundation and a disqualified person are generally acts of self-dealing under §4941, with listed exceptions. Indirect self-dealing is also prohibited. An audit tests related-party activity, so it can surface these early.
For a full overview, see the IRS Life Cycle of a Private Foundation.
How it works with us
Best for: family and independent foundations whose state, bank, donor or board requires audited or reviewed statements.
- Free initial consultation. Share your state registrations, your last Form 990-PF and what is driving the request.
- Fees quoted upfront, in writing. Transparent, fair fees in an engagement letter that names the report type.
- Independence check. We confirm independence before we accept an audit or review.
- One request list. Investment statements, grant files, board minutes and related-party information.
- Fieldwork, done remotely. We confirm investment balances and test grants and expenses.
- Report. We present results to the board and issue the report.
We can also prepare the foundation's Form 990-PF, subject to independence rules.
Private foundation requirements at a glance
| Requirement | Applies when | Source |
|---|---|---|
| Federal audit of financial statements | Not required by the IRC or Form 990-PF | Form 990-PF instructions |
| File Form 990-PF | Every year, by the 15th day of the 5th month after year end | Form 990-PF instructions |
| Send a copy of 990-PF to state Attorneys General | Where state law requires it | Form 990-PF instructions |
| California audit | Gross revenue of $2,000,000 or more (government grants requiring an accounting excluded) | Gov. Code §12586(e) |
| Massachusetts audit or review | Not required for 990-PF filers | MA Attorney General |
| Excise tax on net investment income | 1.39% of net investment income | IRC §4940 (IRS) |
| Minimum distribution | Distributable amount based on 5% of noncharitable-use assets; 30% tax on shortfalls | IRC §4942 (IRS) |
| Self-dealing prohibition | Sales, leases, loans, services or compensation involving a disqualified person (exceptions apply) | IRC §4941 (IRS) |
| Audit by agreement | When a lender, donor or your bylaws require it | Your loan, gift agreement or bylaws |
Expert CPAs. Personal attention.
Not sure if your foundation needs an audit? Share your state registrations and the request in a free initial consultation and we'll tell you what applies.
Frequently asked questions
Sources
- IRS: Instructions for Form 990-PF
- IRS: Tax on net investment income (§4940)
- IRS: Taxes on failure to distribute income (§4942)
- IRS: Acts of self-dealing by a private foundation (§4941)
- California Government Code §12586
- Massachusetts Attorney General: Audits and reviews for charitable organizations
General information as of October 10, 2026. Tax rules change; talk to a CPA about your situation.