Tax-exempt organizations operate under a fundamentally different tax regime than for-profit businesses. Under IRC 501(c)(3), organizations that are organized and operated exclusively for exempt purposes (charitable, religious, educational, scientific, literary, testing for public safety, fostering amateur sports, or preventing cruelty to children or animals) are exempt from federal income tax on income related to their exempt purpose. However, “tax-exempt” doesn’t mean “no tax rules.” These organizations face extensive compliance requirements including annual information returns (Form 990), restrictions on how money is spent, prohibitions on private benefit and excessive compensation, limits on lobbying activity, and a complete ban on political campaign intervention. Unrelated business income (income from a trade or business regularly carried on that isn’t substantially related to the exempt purpose) is taxed at regular corporate rates under IRC 511-514. For business owners considering starting or funding a nonprofit, understanding these rules is essential to avoiding revocation of exempt status and excise taxes.
✓Key takeaway
Types of tax-exempt organizations:
IRC Section
Type
Examples
Deductible Donations?
501(c)(3)
Charitable, religious, educational, scientific
Churches, schools, hospitals, food banks, research foundations
Yes (income tax deduction for donors)
501(c)(4)
Social welfare
Civic leagues, advocacy organizations
No (not deductible)
501(c)(6)
Business leagues
Chambers of commerce, trade associations, professional organizations
Partially (as business expense, not charity)
501(c)(7)
Social clubs
Country clubs, hobby clubs
No
501(c)(19)
Veterans’ organizations
VFW, American Legion posts
Yes (if meets requirements)
501(c)(3) sub-types:
Type
How Funded
Annual Filing
Public Scrutiny
Public charity
Broad public support (donations, grants, program revenue)
Form 990 or 990-EZ
Highest (990 is public)
Private foundation
Funded by one source (individual, family, corporation)
Form 990-PF
Highest + 5% minimum distribution requirement
Private operating foundation
Directly runs charitable programs (not just grant-making)
Form 990-PF
Moderate (some rules relaxed vs. private foundation)
How do you form and maintain a 501(c)(3) organization?
What is unrelated business income tax and when do nonprofits owe it?
Unrelated business income tax (UBIT) under IRC 511 applies to income from a trade or business that is regularly carried on and not substantially related to the organization’s exempt purpose. Common UBIT triggers include advertising revenue in exempt publications, rental income from debt-financed property, and fees from services provided to non-members that compete with commercial businesses. The first $1,000 of unrelated business income is exempt, and after that, the income is taxed at regular corporate rates (21% for 2025) and reported on Form 990-T. UBIT is calculated separately for each unrelated trade or business activity under the ‘siloing’ rules enacted by the Tax Cuts and Jobs Act, meaning losses from one activity can’t offset income from another.
Want this checked against your own situation?
Start with a Diagnostic: a CPA licensed in the US and Canada reads your file and tells you in writing what's wrong and how to fix it, three to four business days after you finish the questions. The report is $250. If you hire us for any work after that, you get the $250 back as a discount on that work. Or send us your return or your letter and get a fixed price, free.