501(c)(3) vs. 501(c)(4)

What is the difference between a 501(c)(3) and a 501(c)(4) nonprofit?

The main difference between a 501(c)(3) and a 501(c)(4) nonprofit organization lies in their purposes, tax benefits, and political involvement:

Category	501(c)(3)	501(c)(4)
Purpose	Charitable, educational, religious, scientific, or literary. Must serve the public good. Examples: Charities, churches, schools, hospitals, museums.	Social welfare and advocacy organizations. Can engage in broader advocacy and lobbying. Examples: Advocacy groups, PACs, environmental orgs, some trade associations.
Tax Status	Donations tax-deductible for donors. Organization exempt from federal income taxes.	Donations not tax-deductible. Organization still exempt from federal income taxes.
Political Involvement	Cannot support or oppose candidates. Only limited lobbying (no more than ~5–10% of activities).	Can engage in lobbying and political campaigns, but political work cannot be the primary purpose.
Funding & Contributions	Easier to attract donations and grants due to tax-deductible status.	Fundraising more difficult without tax-deductible donations, but may appeal to policy-focused donors.
Lobbying	Limited and secondary to charitable/educational purposes.	Lobbying can be a major part of activities as long as social welfare remains primary.
Summary	Charitable/educational focus, tax-deductible donations, strict limits on politics.	Social welfare/advocacy focus, no donor tax deduction, more freedom in lobbying/politics.

For more information regarding tax codes for nonprofits go to the IRS website.