Pass-Through Nonprofits: How Dark Money Changes Hands

Pass-through nonprofits occupy a central role in the architecture of dark money—serving as conduits that move funds between donors and the organizations that ultimately spend on political activity. Understanding how these entities function clarifies why donor identities remain hidden even when spending becomes visible at the end of the chain. This page covers the definition and scope of pass-through arrangements, the mechanics of fund transfer, common structural scenarios, and the legal boundaries that determine whether a given arrangement is permissible under federal law.

Definition and scope

A pass-through nonprofit, in the context of campaign finance, is a tax-exempt organization that receives contributions and transfers a substantial portion of those funds to one or more other organizations rather than spending them directly on its own programs. The receiving organization then conducts political activity, issue advocacy, or further grants to additional entities. The source organization's donor list is shielded from public disclosure because neither the Internal Revenue Service nor the Federal Election Commission (FEC Disclosure Rules) requires most nonprofit-to-nonprofit grant recipients to identify the original contributors.

The scope of this practice extends across 501(c)(4) social welfare organizations, 501(c)(6) trade associations, and 501(c)(3) public charities, though each category faces different restrictions on political activity. The dark money landscape is shaped significantly by the layering these organizations create—donors give to Entity A, which grants to Entity B, which funds advertising or lobbying through Entity C. Each transfer is documented only in the granting organization's IRS Form 990, which lists the recipient organization and dollar amount but not the original donor's identity.

How it works

The mechanical sequence of a pass-through arrangement follows a predictable pattern:

1. Initial contribution: An individual donor, corporation, or other organization contributes funds to a 501(c)(4) or 501(c)(6) nonprofit. This contribution is not publicly disclosed because these organizations are not required to file FEC donor reports for general treasury contributions.
2. Grant transfer: The receiving nonprofit reports the transfer as a grant on Schedule I of IRS Form 990, identifying the recipient organization by name and EIN and stating the dollar amount granted.
3. Secondary deployment: The recipient organization—which may itself be another nonprofit, a super PAC, or a social welfare organization—uses the funds for political advertising, voter registration, issue advocacy, or additional grants.
4. Spending disclosure: If the funds ultimately flow to a super PAC or a political committee, FEC filings will show the grant from the intermediate nonprofit. The reported contributor is the nonprofit, not the original human donor.

The critical insulation point is step one: because contributions to 501(c)(4) organizations are not subject to FEC reporting requirements for non-electoral activity, the original donor's identity does not appear in any public record. The IRS does collect donor information on Schedule B of Form 990, but that schedule is withheld from public view under 26 U.S.C. § 6104, which governs public inspection of tax returns.

The broader context of these rules and how they interact with IRS rules for dark money nonprofits determines what a given organization must report and to whom.

Common scenarios

Three structural patterns appear with notable frequency in documented dark money networks:

Scenario 1 — Single-hop pass-through: A 501(c)(4) organization collects contributions and writes a single large grant to a super PAC. The super PAC discloses the nonprofit as the donor, satisfying FEC requirements. The nonprofit's donors remain anonymous. OpenSecrets (opensecrets.org) has documented this pattern in elections where a nonprofit transferred more than $10 million to affiliated super PACs in a single election cycle.

Scenario 2 — Multi-hop layering: A donor contributes to Nonprofit A, which grants to Nonprofit B, which grants to Nonprofit C, which finally spends on electioneering communications. Each hop is documented on Form 990, but each Form 990 takes 12 to 18 months to become publicly available after filing, meaning the full chain may not be reconstructable until well after the relevant election.

Scenario 3 — Hub-and-spoke networks: A central organization acts as both a fundraising vehicle and a distribution hub, sending grants to 4 or more affiliate organizations that each run distinct issue campaigns. The Koch network and the Crossroads GPS structure both exhibit documented hub-and-spoke characteristics according to investigative reporting by ProPublica and The New York Times.

Contrasting single-hop versus multi-hop arrangements: single-hop structures are simpler to trace through FEC filings but still obscure original donors; multi-hop structures compound opacity because each intermediate entity introduces a 12-to-18-month disclosure lag and a separate legal entity whose internal records are not public.

Decision boundaries

Whether a pass-through arrangement raises legal concerns depends on the answers to three threshold questions:

Primary purpose test: A 501(c)(4) organization must be operated exclusively for social welfare purposes, which the IRS has interpreted to mean that political activity cannot constitute the organization's primary activity. If pass-through grants are overwhelmingly directed to political spending, the organization risks loss of tax-exempt status. The IRS has audited organizations under this standard but has not publicly issued definitive numerical thresholds—enforcement has been inconsistent according to the Government Accountability Office (GAO Report GAO-13-619).

Coordination prohibition: Grants from a nonprofit to a super PAC do not trigger FEC coordination rules solely because of a pre-existing relationship between the organizations, but specific coordination on expenditures can convert independent expenditures into illegal in-kind contributions under 52 U.S.C. § 30116.

Earmarking doctrine: A contribution earmarked for political purposes that passes through a nonprofit intermediary may be treated as a direct contribution to the ultimate recipient, potentially triggering FEC contribution limits and disclosure requirements. Earmarking analysis is central to understanding FEC disclosure rules as they apply to intermediary entities.

The full scope of donor network activity, including how pass-through arrangements connect to broader donor networks, is mapped across the reference resources at darkmoneyauthority.com.