How to File Form 990-PF for a Small Private Foundation (2026 Guide)
Step-by-step guide to filing Form 990-PF electronically for small and family foundations: who must file, 2026 due dates, excise tax, the 5% rule, and costs.
Introduction
Running a small family foundation is rewarding, but the annual IRS filing can feel overwhelming. Many trustees search for how to file Form 990-PF for a small private foundation because they have no staff, a few investment accounts, and a handful of grants each year.
The good news: the process is manageable once you know the rules. This guide walks you through the Form 990-PF filing requirements, the 2026 due dates, the excise tax, the 5% rule, and the exact steps to file.
Quick answer: Every private foundation must file Form 990-PF each year, regardless of size or income. The return must be filed electronically through an IRS-authorized e-file provider by the 15th day of the 5th month after the tax year ends. Small foundations can get an automatic 6-month extension with Form 8868.
Does a Small Private Foundation Have to File Form 990-PF?
Yes. Unlike public charities, private foundations have no small-size exemption. A foundation with $5,000 in assets files the same return as one with $50 million.
The core Form 990-PF filing requirements for small foundations are:
No 990-N or 990-EZ option. Private foundations cannot use the e-Postcard or the short form, even with very low receipts.
No income still means filing. A foundation with zero income or no grants that year must still file.
Electronic filing is required. Under the Taxpayer First Act, Form 990-PF must be e-filed for tax years beginning after July 1, 2019.
Trusts count too. Nonexempt charitable trusts treated as private foundations generally file Form 990-PF as well.
For most trustees, the 990-PF is effectively their small family foundation tax return. It reports assets, investment income, expenses, grants paid, and the people who run the foundation. It is also a public document, so donors, grantees, and journalists can read it.
Documents You Need Before You Start
Gathering records first saves the most time. Before you begin, collect:
Bank and brokerage statements for the full tax year
Investment income records: dividends, interest, and capital gains (Forms 1099)
Fair market value of assets at year-end
A list of grants paid: recipient name, address, amount, and purpose
Operating and administrative expenses, with receipts
Names, addresses, titles, weekly hours, and pay of all officers and trustees
Any changes to bylaws or articles not yet reported to the IRS
Last year's filed Form 990-PF and your EIN
Tip: use the foundation's address on the return, not a trustee's home address. The form is public.
How to File Form 990-PF Electronically: 7 Steps
Here is how to file 990-PF from start to finish. These steps work for most small private foundations.
Confirm your tax year and due date. Check whether your foundation uses a calendar year or a fiscal year. This sets your deadline.
Organize your financial records. Reconcile bank and investment accounts. Make sure totals match your books before entering anything.
Separate investment and charitable expenses. Form 990-PF reports expenses in columns. Fees for managing investments and costs of charitable work must be allocated correctly.
Calculate net investment income and excise tax. Add dividends, interest, and net capital gains, then subtract allowable investment expenses. The excise tax is based on this figure.
Complete the minimum distribution section. Small foundations must show that qualifying distributions meet the 5% payout requirement (explained below).
Fill in officers, grants, and activities. List every trustee with hours and pay, each grant paid, and a clear mission statement.
E-file through an IRS-authorized provider. Form 990-PF cannot be submitted on IRS.gov directly the way Form 990-N can. You file through approved software or a tax professional, then save the IRS acceptance confirmation.
If the IRS rejects the return, the provider shows an error code. Fix the issue and resubmit quickly to keep your filing on time.
Form 990-PF Due Date 2026 and Extension
Form 990-PF is due on the 15th day of the 5th month after your tax year ends. If that date falls on a weekend or holiday, it moves to the next business day.
| Tax year ends | Original due date | Extended due date (Form 8868) |
|---|---|---|
| June 30, 2026 | November 16, 2026 | May 17, 2027 |
| December 31, 2026 | May 17, 2027 | November 15, 2027 |
Need More Time to File Form 990-PF?
You can request a Form 990-PF extension by filing Form 8868 before the original due date. An approved extension generally provides an automatic six-month extension to file, without requiring an explanation.
Important Tax Reminder
An extension gives you more time to file, not more time to pay. Any excise tax owed generally remains due by the original deadline. Make sure you understand your filing and payment obligations.
Need help with the process? Read our complete guide: How to File a Form 990 Extension →
Excise Tax and the 5% Rule for Small Foundations
Private foundation excise tax
Most private foundations pay a private foundation excise tax of 1.39% on net investment income. For example, a foundation with $20,000 in net investment income would owe about $278.
If the expected tax is $500 or more, the foundation generally must make estimated tax payments during the year. Many small foundations miss this rule.
Private foundation 5% minimum distribution rule
Non-operating private foundations must distribute roughly 5% of the average value of their investment assets each year. This is the private foundation 5% minimum distribution rule.
Qualifying distributions include grants to public charities and reasonable charitable expenses. If a foundation falls short, it generally has until the end of the following year to catch up before penalty taxes apply.
Common Mistakes Small Foundations Make
These errors cause rejections, IRS notices, or penalties:
Skipping the return in a quiet year. No grants or no income does not remove the filing duty.
Mixing investment and charitable expenses. Wrong allocations change both the excise tax and the 5% calculation.
Using the accrual basis for grants. Charitable disbursements must be reported on a cash basis.
Leaving out trustee hours. Every officer and trustee needs average weekly hours, even if unpaid.
Missing grantee details. Each grant needs the recipient's name, address, status, and purpose.
Ignoring estimated tax payments. Underpayment can lead to added penalties.
Filing late. Daily penalties can add up quickly. Read our Form 990 late filing penalties guide to learn more.
How Much Does It Cost to File Form 990-PF?
The IRS charges no fee to file. Your cost depends on whether you do it yourself or hire help.
| Option | Typical cost | Best for |
|---|---|---|
| DIY e-file software | Software fees plus your time | Trustees with accounting experience |
| CPA or accounting firm | Often hourly; varies widely | Complex foundations with many investments |
| Form990Series flat-rate service | $499 flat | Small and family foundations that want expert help at a fixed price |
For small foundations, the hidden cost of DIY is time and risk. One allocation mistake can affect your tax and your 5% payout. See our full guide on how much it costs to file Form 990.
Let an Enrolled Agent handle it. Form990Series prepares and e-files Form 990-PF for small private foundations for $499 flat, with no hidden fees. Start your Form 990-PF filing →
Frequently Asked Questions
What is Form 990-PF?
Form 990-PF is the annual return every private foundation files with the IRS. It reports investment income, calculates the 1.39% excise tax on net investment income, documents charitable distributions and grants, and discloses officer compensation and foundation activities.
Do all private foundations need to file Form 990-PF?
Yes. All private foundations must file Form 990-PF each year, whether or not they had taxable income or any activity during the year. A dormant or brand-new foundation still files.
Who is required to file Form 990-PF?
Exempt and taxable private foundations, organizations that agree to private foundation status while their exemption application is still pending, and Section 4947(a)(1) nonexempt charitable trusts treated as private foundations must all file.
Can a private foundation file Form 990, 990-EZ, or 990-N instead?
No. A private foundation cannot choose to file Form 990 or 990-EZ; it must file Form 990-PF regardless of its gross receipts and assets. The 990-N e-Postcard is also not available to private foundations.
How does Form 990-PF differ from filing requirements for public charities?
Public charities file Form 990 (or 990-EZ or 990-N, depending on size). Form 990-PF has no filing threshold: public charities’ forms get more complex as income grows, but private foundations must complete the entire Form 990-PF regardless of income.
Are private foundations required to e-file Form 990-PF?
Yes. Under the Taxpayer First Act of 2019, private foundations must e-file Form 990-PF for tax years ending on or after July 31, 2020. You file through IRS-authorized e-file software or a tax professional.
When is Form 990-PF due?
It is due by the 15th day of the 5th month after the foundation’s accounting period ends. If the due date falls on a Saturday, Sunday, or legal holiday, the return can be filed on the next business day. For a June 30, 2026 year-end, that is November 16, 2026.
Can a private foundation get an extension to file Form 990-PF?
Yes. Private foundations can get more time by filing Form 8868 on or before the original filing deadline. The extension is an automatic 6 months, but any tax owed is still due by the original date.
What happens if Form 990-PF is filed late?
The IRS charges a penalty for each day the return is late, up to a maximum cap, unless the foundation can show the failure was due to reasonable cause.
Is Form 990-PF accessible to the public?
Yes. Form 990-PF is a public document. Anyone can look up a foundation’s 990-PF on GuideStar or ProPublica’s Nonprofit Explorer and see who it funded and how much. Use the foundation’s address on the return, not a trustee’s home address.
Conclusion
Knowing how to file Form 990-PF for a small private foundation comes down to a few habits: keep clean records, separate investment and charitable costs, track the 5% payout, and e-file before the deadline.
Small foundations have no size exemption, so the return is due every year. If you want it done accurately without the stress, our IRS Enrolled Agent team can prepare and e-file it for you at a flat rate.
File your Form 990-PF for $499 flat →
