Can Donors Be Anonymous on Form 990 Schedule B?

Donor anonymity on Form 990 Schedule B works on two levels that are easy to confuse. To the IRS, a donor who crosses the reporting threshold is never anonymous: the organization has to list a name, address, amount, and gift type. To the public, most donors are shielded — the organization redacts Schedule B before making its return available for inspection. The important exceptions are private foundations and Section 527 political organizations, whose contributor lists are open to anyone who asks.

When the IRS Requires a Donor to Be Named

Schedule B attaches to Form 990, 990-EZ, or 990-PF whenever an organization has received $5,000 or more in contributions from a single source during the tax year.¹ Filers include 501(c)(3) public charities, private foundations, 501(c)(4) social welfare organizations, and Section 527 political organizations.²

The $5,000 figure is the yearly total from one contributor, not a per-gift amount. Cash, payroll gifts, bequests, grants, and noncash property like securities or real estate all count. Payments where the donor gets something of roughly equal value back, such as event tickets priced at fair market value, are not contributions.

There is a quirk in how the total gets built. Only individual gifts of $1,000 or more count toward the running total that determines whether a donor crosses $5,000.² A donor who sends twelve monthly gifts of $450 — $5,400 for the year — does not have to be identified, because no single gift reached $1,000. Someone who writes four checks of $1,500, on the other hand, adds up to $6,000 and gets listed. Contributors who fall below the reporting threshold appear only in aggregate: a lump-sum line showing the number of unlisted donors and the total dollars they gave.

The 2% Rule for Qualifying Public Charities

Public charities that meet the 33⅓% support test under Sections 509(a)(1) and 170(b)(1)(A)(vi) get a much higher reporting floor. For these organizations, a donor must be identified only if the gift is both $5,000 or more and greater than 2% of the total contributions reported on Form 990, Part VIII, line 1h.²

The practical effect is large. A public charity that took in $10 million in contributions has a 2% line at $200,000. A $50,000 gift clears the $5,000 floor but stays well below 2%, so the donor does not appear on Schedule B. Only contributors above $200,000 get named.

The organization has to show it qualifies for this treatment on Schedule A, either by meeting the 33⅓% support test in the current or prior year or by checking the appropriate box during its first five years of existence.² Charities that rely on the weaker 10% facts-and-circumstances test do not get the 2% benefit and fall back to the general $5,000 rule.

Noncash Gifts

For gifts of property, fair market value at the time of the gift decides whether the threshold is crossed. Donated securities that are sold immediately through a broker are still treated as noncash contributions, reported at net proceeds plus broker fees. Securities held rather than sold are valued at the average of the highest and lowest quoted prices on the contribution date, property without a ready market value is reported at appraised or estimated value, and any outstanding debt on the property is subtracted from fair market value.²

Whether the Public Sees the Donor’s Name

This is where anonymity actually lives. Under 26 U.S.C. §6104, contributor names and addresses on Schedule B are protected from public inspection for most tax-exempt organizations. When such an organization hands over its Form 990 in response to a public records request, it may redact Schedule B, and the public sees only summary information: total contributions and the number of contributors.³ Contribution amounts, descriptions of noncash property, and other non-identifying details still have to be available for inspection unless they would clearly identify the donor.

Private Foundations and 527 Political Organizations

Section 6104(b) carves two categories out of the non-disclosure rule. Contributors to private foundations and to Section 527 political organizations can be identified by anyone who requests the return.³ For a private foundation donor, that is the structural trade-off: your name is a matter of public record. For a 527 donor, public disclosure is part of using a tax-exempt vehicle for political spending, and 527s also face separate reporting on Form 8872 with lower dollar triggers.

501(c)(4) and Other Non-501(c)(3) Filers

Social welfare organizations under 501(c)(4), labor unions, trade associations, and other non-501(c)(3) exempt filers apply the standard $5,000 rule but are not required to report contributor names and addresses on the Schedule B they file with the IRS. They report the amounts and may enter “N/A” in the name fields. The organization keeps donor records internally; the IRS simply doesn’t collect the identifying information through this schedule. Section 527 organizations, by contrast, do have to list names and addresses.²

State Disclosure Demands

Some states used to require charities to submit an unredacted Schedule B as part of charitable solicitation registration. California’s blanket demand was struck down by the U.S. Supreme Court in 2021 in Americans for Prosperity Foundation v. Bonta. The Court held the requirement failed exacting scrutiny under the First Amendment because it was not narrowly tailored to the state’s investigative interests and risked chilling donor association.⁴ The ruling limits but does not entirely foreclose state demands for donor lists. Organizations registering to solicit in multiple states should check whether a given state still requests an unredacted Schedule B and on what basis.

If the Organization Gets It Wrong

Omitting a required contributor or misreporting a gift is treated as an incomplete Form 990. Daily penalties apply, and an organization that fails to file any required Form 990-series return for three consecutive years automatically loses its tax-exempt status on the third missed due date.⁵ An amended Form 990 can be filed at any time to add a missing contributor or correct a listing; the amended return has to be complete, with the “Amended return” box checked and the change described on Schedule O.⁶ Correcting the record early is the better path, particularly once the IRS has flagged the return.

1
Internal Revenue Service. IRS Form 990 Schedule B – Schedule of Contributors
2
Internal Revenue Service. Instructions for Schedule B (Form 990)
3
Office of the Law Revision Counsel. 26 U.S. Code 6104 – Publicity of Information Required From Certain Exempt Organizations and Certain Trusts
4
Supreme Court of the United States. Americans for Prosperity Foundation v. Bonta
5
Internal Revenue Service. Automatic Revocation of Exemption
6
Internal Revenue Service. 2025 Instructions for Form 990 Return of Organization Exempt From Income Tax