Lobbying Rules for Nonprofits: What 501(c)(3)s Can and Cannot Do

Estimated reading time: 15 minute(s)

If you’ve ever hesitated before sending an email urging supporters to “contact your representative,” you’re not alone. Lobbying is one of the most misunderstood areas of nonprofit compliance. The rules aren’t intuitive, the terminology is dense, and the consequences of getting it wrong can be serious. 

Here’s the good news: 501(c)(3) organizations are allowed to lobby. Understanding where that limit sits is what keeps your advocacy work on the right side of the line. 

Lobbying vs. Political Campaign Activity: Know the Difference First 

Before getting into limits, it’s worth separating two things that often get lumped together:

• Lobbying means attempting to influence legislation by supporting or opposing a specific bill, ballot measure, or piece of proposed law.
  
• Political campaign intervention means supporting or opposing a candidate for public office.

The second one is strictly prohibited for 501(c)(3) organizations, with zero expectations, with zero exceptions. No endorsements, no candidate donations, no framing an issue in a way that clearly favors one candidate over another.

Lobbying, by contrast, is allowed within limits. That distinction matters because organizations sometimes assume “we can’t lobby” when what they actually mean is “we can’t get involved in elections.” Those are two different rules with two different consequences.

What Counts as Lobbying?

The IRS recognizes two categories:

Direct lobbying is communicating with a legislator, legislative staffer, or other government official who participates in making the legislation, and expressing a view on a specific legislation. This also includes communicating with your own members and asking them to take a similar position, if the message includes a call to action.

Grassroots lobbying is communicating with the general public that expresses a view on specific legislation and includes a call to action, such as urging people to contact their legislators.

A key detail here: general advocacy or public education doesn’t count as lobbying unless it references specific legislation and asks the audience to do something about it. Publishing a report on housing insecurity is not lobbying. Publishing that same report with a note urging readers to call their senator about a specific housing bill likely is.

How Much Lobbying Is Too Much?

This is where most organizations get tripped up, because there are actually two different tests the IRS uses, and which one applies depends on an election your organization can make.

The Substantial Part Test (the default)

Without any special election, every 501(c)(3) is automatically subject to the substantial part test. It’s exactly as vague as it sounds: lobbying activity cannot make up a “substantial part” of the organization’s overall activities. The IRS has never defined “substantial” with a bright-line percentage, which means organizations are left weighing time, expenditures, and overall organizational focus.

The 501(h) Expenditure Test (the measurable option)

Most public charities can choose to file Form 5768 to elect the 501(h) expenditure test instead. This swaps the vague “substantial part” standard for actual dollar limits based on a sliding scale of the organization’s exempt purpose expenditures. In simple terms: bigger budget, higher lobbying ceiling.

There are separate, lower limits specifically for grassroots lobbying, since Congress viewed direct communication with legislators as less risky than mobilizing the public.

Organizations that make the 501(h) election generally find it far easier to track compliance, because it replaces subjective judgement with a formula. It’s not available to churches or certain other organizations, but for most public charities, it’s worth a serious look.

Consequence of going over the limit either way: exceeding the threshold can trigger excise taxes, and in more serious or repeated cases, revocation of tax-exempt status.

What This Looks Like on Form 990

Lobbying activity and expenditures typically get reported on Schedule C of Form 990. Organizations that made 501(h) elections use Part II-A of that schedule to report actual and permitted lobbying expenditures; those relying on the substantial part test complete Part II-B instead, which is more narrative and activity-based. 

Accurate recordkeeping throughout the year makes this section far less painful to complete when filing season arrives. 

A Few Things 501(c)(3)s Can Always Do

To bring this back to practical terms, here’s activity that generally falls outside the lobbying definition entirely:

• Nonpartisan research, analysis, and educational materials on public policy issues
• Responding to a written request from a legislative body for technical assistance
• Discussing broad social, economic, or policy issues without referencing specific legislation
• Self-defense lobbying – communicating with legislators about a bill that would directly affect the organization’s own existence, powers, or tax-exempt status 

These carve-outs give nonprofits room to engage in public discourse and policy education without it counting against a lobbying limit at all.

The Bottom Line 

Lobbying isn’t off limits for 501(c)(3) organizations. Deciding early whether to operate under the substantial part test or make the 501(h) election, and keeping clean records of advocacy-related time and spending throughout the year, turns Schedule C from a filing headache into a straightforward summary of work you’ve already tracked.

Tax990 supports all Form 990 schedules to help your nonprofit report its activities accurately and file with confidence.