A 501(c)(3) organization can lobby, but only within limits, and the 501(c)(3) lobbying limits come in two versions. By default, lobbying cannot be a “substantial part” of what the organization does. Organizations that elect the alternative 501(h) expenditure test get concrete dollar caps tied to their budget, topping out at $1 million per year in lobbying spending. Cross either limit and the organization risks losing its tax-exempt status.
What Counts as Lobbying
The IRS treats lobbying as any activity meant to influence legislation. “Legislation” is broad: bills before Congress, state legislatures, and local councils, plus ballot initiatives, referendums, and constitutional amendments put to a public vote. It does not cover actions by executive agencies, courts, or administrative bodies. Advocating for or against a regulation or an executive order is not lobbying under these rules.1Internal Revenue Service. Lobbying
Lobbying comes in two forms. Direct lobbying means communicating with legislators or their staff to express a position on specific legislation. Grassroots lobbying means trying to get the general public to contact legislators about specific legislation. Both require a reference to identifiable legislation and a clear viewpoint on it. A general statement about housing policy is not lobbying; asking supporters to call their senator about a pending housing bill is.
Several common activities fall outside the lobbying definition even when they touch on policy:
- Nonpartisan analysis or research, if it presents a sufficiently full and fair treatment of the issue, even when distributed to legislators.
- Technical advice provided in response to a written request from a legislative committee or other governmental body.
- Self-defense communications about legislation that would directly affect the organization’s own existence, powers, or tax-exempt status.
- Communications with executive branch officials about policy, unless the real purpose is to influence pending legislation indirectly.
The Substantial Part Test
Every 501(c)(3) is automatically subject to the substantial part test unless it affirmatively elects the alternative. The rule is simple in concept: no substantial part of the organization’s activities may consist of attempting to influence legislation.2Office of the Law Revision Counsel. 26 USC 501 – Exemption From Tax on Corporations, Certain Trusts, Etc. Neither the statute nor the IRS defines “substantial” with any precision.
The IRS evaluates substantiality based on all the facts and circumstances of each case, looking at both the money spent on lobbying and the time devoted to it, including time contributed by unpaid volunteers.3Internal Revenue Service. Measuring Lobbying: Substantial Part Test The volunteer piece catches organizations off guard. A tiny lobbying budget combined with a large corps of volunteers logging hours on legislative advocacy can still push an organization over the line.
The 501(h) Expenditure Test
Eligible public charities can trade the ambiguity of the substantial part test for a dollar-based rule by electing the 501(h) expenditure test. The election is made on IRS Form 5768, which must be signed and postmarked within the first tax year it applies to. Once filed, it stays in effect for all future tax years until the organization revokes it.4Internal Revenue Service. Form 5768 – Election/Revocation of Election by an Eligible Section 501(c)(3) Organization To Make Expenditures To Influence Legislation
The 501(h) limit is a percentage of “exempt purpose expenditures,” which is essentially total spending on mission-related work, including lobbying itself, program costs, administrative overhead, and fundraising. The percentages taper as spending rises:5Office of the Law Revision Counsel. 26 USC 4911 – Tax on Excess Expenditures To Influence Legislation
- 20% of the first $500,000 of exempt purpose expenditures.
- 15% of the next $500,000 (from $500,000 up to $1 million).
- 10% of the next $500,000 (from $1 million up to $1.5 million).
- 5% of everything above $1.5 million.
The absolute ceiling is $1 million in lobbying expenditures per year, regardless of how large the budget grows. Within that overall lobbying limit, grassroots lobbying is capped at 25% of the total permissible amount. An organization allowed $200,000 in total lobbying could therefore spend no more than $50,000 on grassroots efforts.5Office of the Law Revision Counsel. 26 USC 4911 – Tax on Excess Expenditures To Influence Legislation
A Worked Example
Say your organization spends $800,000 on exempt purposes in a year. The lobbying nontaxable amount is 20% of the first $500,000 ($100,000) plus 15% of the remaining $300,000 ($45,000), for a total lobbying limit of $145,000. The grassroots cap is 25% of that, or $36,250.
Who Cannot Elect 501(h)
Churches, conventions or associations of churches, integrated auxiliaries of churches, and private foundations cannot make the 501(h) election. They remain under the substantial part test. Religious organizations that do not qualify as “churches” under IRS criteria can still elect 501(h), so the distinction between a church and a religious nonprofit matters here.
Ballot Measures Count as Direct Lobbying
Advocacy on ballot measures counts as lobbying. When voters decide an issue through a referendum, ballot initiative, or constitutional amendment, the IRS treats the general public in that state or locality as the legislative body. Under the 501(h) regulations, urging voters to support or oppose a ballot measure is direct lobbying, not grassroots lobbying, because the communication goes directly to the “legislators.”6eCFR. 26 CFR 56.4911-2 – Lobbying Expenditures, Direct Lobbying Communications, and Grass Roots Lobbying Communications
That classification matters for budgeting. A statewide ballot campaign counts against your direct lobbying limit, not the smaller grassroots cap. Organizations that plan around the grassroots cap can blow through their limits faster than expected.
Penalties for Exceeding the Limits
Consequences differ by test, but both paths can end in loss of tax-exempt status.
Under the Substantial Part Test
An organization found to have engaged in substantial lobbying can lose its 501(c)(3) status outright, making all of its income taxable. On top of that, the organization owes an excise tax equal to 5% of its lobbying expenditures for the year it loses exemption.3Internal Revenue Service. Measuring Lobbying: Substantial Part Test Individual managers face the same 5% tax if they willfully agreed to the expenditures knowing they would likely cost the organization its exempt status.7Office of the Law Revision Counsel. 26 USC 4912 – Tax on Disqualifying Lobbying Expenditures of Certain Organizations
Under the 501(h) Expenditure Test
The 501(h) test is more forgiving for a one-time overage. Exceed your lobbying limit in a single year and you owe a 25% excise tax on the excess amount, but exempt status is not automatically lost.5Office of the Law Revision Counsel. 26 USC 4911 – Tax on Excess Expenditures To Influence Legislation The tax is reported and paid on Form 4720.8Internal Revenue Service. 2025 Instructions for Form 4720 – Return of Certain Excise Taxes Under Chapters 41 and 42 of the Internal Revenue Code
Loss of exemption kicks in only if lobbying expenditures normally exceed 150% of the allowable limit, measured over a four-year averaging period. The same 150% threshold applies separately to grassroots lobbying. A single year of heavy lobbying around a critical issue will not destroy your exempt status if you stay well under the limits in surrounding years.
Lobbying Is Not the Same as Campaign Activity
A 501(c)(3) can do some lobbying. It can do zero political campaign intervention. The ban on campaign activity is absolute: no endorsing candidates, no contributing to campaigns, no distributing statements that favor or oppose anyone running for office at any level of government.2Office of the Law Revision Counsel. 26 USC 501 – Exemption From Tax on Corporations, Certain Trusts, Etc. The lobbying limits described above do not create any allowance for campaign work.
Reporting on Schedule C
Every 501(c)(3) that engages in lobbying reports it on Schedule C of the annual Form 990. The format depends on the test.9Internal Revenue Service. Instructions for Schedule C (Form 990)
Organizations that elected 501(h) complete Part II-A, reporting total exempt purpose expenditures, direct lobbying expenditures, grassroots lobbying expenditures, and any excess amounts. Prior four-year data is also required so the IRS can calculate the 150% averaging test.
Organizations under the substantial part test complete Part II-B, which asks whether you used volunteers, paid staff, advertisements, or other methods to lobby, and requires total lobbying expenditure amounts along with a description of the activities.
State Registration Is Separate
Federal tax rules are only half the picture. Most states require organizations and individuals who lobby state or local government to register and file periodic disclosure reports. Registration fees range from nothing to several hundred dollars, and many states offer reduced fees or exemptions for nonprofits. Thresholds that trigger registration vary widely, so an organization doing even modest state-level advocacy should check the requirements in each state where it operates. Failing to register can result in fines or other penalties that are entirely separate from the federal tax consequences.