IRS Rules on Political Activity for Grassroots Nonprofits

Federal tax law places firm boundaries on the political activities permitted by tax-exempt nonprofits, and those boundaries vary significantly depending on which section of the Internal Revenue Code an organization operates under. For grassroots nonprofits — which often mobilize citizens around issues that overlap with electoral politics — understanding these rules is operationally critical. Violations can trigger excise taxes, loss of tax-exempt status, or mandatory disclosure requirements enforced by the IRS.

Definition and scope

The IRS distinguishes between two primary categories of political activity: partisan electoral activity and lobbying. Partisan electoral activity means intervening in campaigns for or against candidates for public office. Lobbying means attempting to influence legislation, either directly (communicating with legislators) or indirectly through "grassroots lobbying" — urging the public to contact legislators about specific legislation (IRS Publication 557).

These rules apply differently across the two most common nonprofit structures used by civic organizations:

• 501(c)(3) organizations — charitable, religious, and educational entities — face an absolute prohibition on partisan electoral activity under 26 U.S.C. § 501(c)(3). Lobbying is permitted but must remain "insubstantial" relative to total activities, unless the organization elects the expenditure test under Section 501(h).
• 501(c)(4) organizations — social welfare organizations — may engage in some partisan electoral activity, but only as a secondary purpose; the primary purpose must remain community benefit. They may lobby without limit as long as it advances their social welfare mission (IRS, Social Welfare Organizations).

For a structured comparison of these two entity types, see 501(c)(3) vs. 501(c)(4) Structure.

How it works

For 501(c)(3) organizations, the lobbying restriction operates under one of two tests:

1. Substantial Part Test — The default standard. No precise percentage threshold is defined by statute, but the IRS uses a facts-and-circumstances analysis. Activities deemed substantial in aggregate can trigger loss of exemption.
2. Expenditure Test (Section 501(h) election) — Organizations that elect this test are subject to defined spending ceilings. A 501(c)(3) with exempt-purpose expenditures of $500,000 may spend up to 20 percent of that amount (up to $100,000) on direct lobbying, and up to 25 percent of the lobbying ceiling on grassroots lobbying, per 26 U.S.C. § 4911. Exceeding these ceilings triggers a 25 percent excise tax on the excess amount.

For 501(c)(4) organizations, there is no lobbying cap. Electoral activity is evaluated under a primary-purpose test. The IRS does not define a single numerical threshold, but historical enforcement has treated expenditures exceeding 49 percent of total spending on electoral activity as evidence that politics has become a primary — rather than secondary — purpose.

Common scenarios

Grassroots nonprofits encounter IRS political-activity rules in predictable operational contexts:

1. Candidate forums — A 501(c)(3) may host a nonpartisan candidate forum if all candidates for a given race are invited, questions are neutral, and no endorsement is made or implied. Selective invitations or loaded questions can convert the event into prohibited electoral activity.
2. Issue advocacy communications — Messages that discuss legislation or policy positions without naming candidates or urging a vote are generally permissible. A communication crosses into electioneering if it is disseminated within 30 days of a primary or 60 days of a general election and names a candidate — the standard established under the FEC's "electioneering communication" definition, which the IRS applies by reference (FEC, Electioneering Communications).
3. Voter registration drives — A 501(c)(3) may conduct nonpartisan voter registration, but activity conducted within 60 days of an election in a jurisdiction where only one party has a primary can attract scrutiny. See Grassroots Voter Registration Drives for operational guidance.
4. Endorsements by staff or officers — An individual's personal endorsement of a candidate does not automatically create organizational liability, provided the endorsement is made in a personal capacity, uses no organizational resources, and is not published on organizational platforms.

Decision boundaries

The line between permissible advocacy and prohibited electoral activity is governed by the primary purpose of the communication or activity, not its form. The IRS applies a facts-and-circumstances standard and looks at the following factors, enumerated in Revenue Ruling 2007-41:

• Whether the communication identifies a candidate
• Whether the communication is made in proximity to an election
• Whether the communication addresses a legislative voting record rather than a policy position
• Whether the communication is part of an ongoing pattern or a one-time activity

A 501(c)(3) engaged in grassroots lobbying rules and limits activity must further distinguish between direct lobbying expenditures and grassroots lobbying expenditures, since the 501(h) ceiling for grassroots lobbying is set at one-quarter of the total lobbying ceiling.

Organizations operating across both issue advocacy and electoral work often use a 501(c)(3)/501(c)(4) affiliate structure to firewall the two. That structure requires strict segregation of funds, separate governance, and no sharing of staff time or resources without documented fair-market-value payments between the entities. The grassroots organizing fundamentals applicable to civic campaigns must be evaluated against these structural constraints before any electoral-adjacent activity begins.

The broader landscape of compliance obligations — spanning campaign finance disclosure, FEC reporting thresholds, and state-level registration requirements — is addressed at grassrootsauthority.com, where these IRS rules are placed in the context of the full regulatory framework governing grassroots civic organizations.