How to Identify Dark Money Groups in Your Election

Identifying dark money groups operating in a specific election requires understanding the legal structures these organizations use, the disclosure gaps that allow donor concealment, and the investigative tools available to researchers, journalists, and engaged citizens. This page covers the definitional markers of dark money entities, the mechanisms by which they enter electoral campaigns, the scenarios most likely to surface in federal and state races, and the analytical boundaries that separate dark money activity from other forms of political spending. The dark money landscape overview provides foundational context for the identification methods described here.

Definition and scope

Dark money, as documented by the Federal Election Commission (FEC), refers to political spending by organizations that are not required to publicly disclose their donors. The primary vehicles are nonprofit organizations exempt under Internal Revenue Code §501(c)(4), §501(c)(6), and §501(c)(3), as well as certain limited liability companies (LLCs) that funnel money into independent expenditures or issue advocacy campaigns.

The defining legal characteristic of a dark money group is its organizational structure under the tax code, not the content of its spending alone. A 501(c)(4) social welfare organization may spend on politics without disclosing donors as long as its "primary purpose" is not electoral — a standard that the IRS has historically applied inconsistently (IRS Revenue Ruling 2004-6). A 501(c)(6) trade association operates under a similar framework.

The scope of dark money in federal elections has been substantial. OpenSecrets reported that dark money spending in federal elections exceeded $1 billion in the 2020 election cycle — the first cycle to cross that threshold. This figure encompasses disclosed independent expenditures and electioneering communications made by organizations that do not themselves disclose donors.

How it works

Dark money groups enter elections through three primary channels:

1. Independent expenditures — Direct spending on advertisements that explicitly advocate for or against a candidate. These expenditures must be reported to the FEC under 52 U.S.C. § 30104, but the reporting obligation falls on the spending organization, not its donors. The source of the funds inside the nonprofit remains hidden.

2. Electioneering communications — Broadcast, cable, or satellite ads that refer to a clearly identified federal candidate within 60 days of a general election or 30 days of a primary, costing more than $10,000 (FEC, 11 CFR §100.29). These trigger FEC disclosure of the spender but not of underlying donors if the spending entity is a nonprofit.

3. Grants to other nonprofits or super PACs — A §501(c)(4) can contribute unlimited funds to a super PAC, which then spends on elections and discloses the nonprofit — but not the nonprofit's donors — as the source. This pass-through structure is the primary mechanism by which donor identity is laundered through multiple organizational layers.

The contrast between a super PAC and a dark money group is critical for identification purposes. A super PAC vs. dark money comparison illustrates the distinction: super PACs must disclose their donors, but when those donors are nonprofits, the underlying individuals remain anonymous. Dark money groups are the layer that absorbs donor identity before it becomes legally reportable.

Common scenarios

Dark money groups appear in elections in recognizable patterns:

Federal races: In U.S. Senate and House races, dark money most commonly surfaces through electioneering communications aired in the final 60 days before a general election. The group's name and a contact address appear in the FEC filing, but no donor list accompanies it. Tracking these filings through the FEC ELEC search against the IRS Form 990 of the named organization reveals whether the nonprofit received large grants from other nonprofits in the same filing period — a structural marker of coordinated dark money networks (OpenSecrets dark money data).

State elections: At the state level, disclosure obligations vary by jurisdiction. As documented by the National Conference of State Legislatures (NCSL), more than 20 states have enacted some form of political spending disclosure that extends beyond federal minimums. In states without such laws, dark money groups may operate through "issue advocacy" — advertising that does not use explicit electoral language — with no disclosure obligation at all (state-level dark money laws).

Judicial elections: Dark money is particularly active in state supreme court races, where 501(c)(4) organizations run issue ads focused on judicial philosophy without triggering electoral disclosure requirements in most states.

Decision boundaries

Not all opaque political spending is dark money. The identification process requires distinguishing:

The analytical boundary for identification turns on two questions: (1) Is the spender legally required to disclose its donors? (2) If required to disclose, does it actually do so in a form that identifies the underlying human sources of funds? When the answer to either question is no, the spending qualifies as dark money under the definition used by the FEC and campaign finance researchers at organizations such as the Campaign Finance Institute.

Researchers attempting to trace dark money in a specific election should cross-reference FEC independent expenditure and electioneering communications databases, IRS Form 990 filings (available through ProPublica Nonprofit Explorer), and state campaign finance databases. When a nonprofit's Form 990 Schedule B — the donor schedule — is withheld from public disclosure (as permitted under IRS rules for §501(c)(4) organizations), the organizational layer is functionally dark regardless of any other disclosures made.