A 501(c)(3) is a nonprofit organization that the Internal Revenue Service has recognized as exempt from federal income tax under Section 501(c)(3) of the Internal Revenue Code. The label covers groups organized and operated for specific purposes the tax code lists as eligible — most commonly charitable, religious, educational, or scientific work — and it carries a second benefit that matters just as much: donors can generally deduct their contributions on their federal tax returns. (The shorthand “5013c” that circulates online is a misspelling; the correct citation is 501(c)(3).)
Two things make the designation more than a label. First, it’s a federal status granted by the IRS, separate from whatever nonprofit corporation you form at the state level. Second, it comes with real restrictions on what the organization can do, and losing the status is easier than most founders realize.
Which Organizations Qualify
The tax code limits 501(c)(3) status to organizations operated exclusively for a defined set of purposes: religious, charitable, scientific, literary, and educational activities, along with testing for public safety, fostering amateur sports competitions, and preventing cruelty to children or animals.
“Charitable” is broader in the tax code than in everyday speech. It reaches relieving poverty, advancing education and religion, lessening the burdens of government, and combating community deterioration. A group working on any of those goals can qualify even if it doesn’t look like a traditional charity.
The amateur sports category has a specific limit worth flagging: the organization qualifies only if it does not provide athletic facilities or equipment. A league that runs competitions can qualify; one that mainly builds and maintains venues generally cannot.
Nonprofit Status and Tax-Exempt Status Are Not the Same Thing
This is the distinction that trips up more founders than any other. Forming a nonprofit corporation means filing articles of incorporation with a secretary of state — that’s a state-law legal structure. Being tax-exempt under 501(c)(3) is a separate federal approval the IRS grants after that state entity already exists.
You need both, in that order. A nonprofit that hasn’t received an IRS determination letter is not a 501(c)(3), and its donors cannot claim deductions for their gifts. Applying for a federal Employer Identification Number before the state incorporation is complete will also stall the IRS side of the process.
Public Charity or Private Foundation
Every 501(c)(3) is classified as one of two things: a public charity or a private foundation. The IRS assumes private foundation status unless the organization proves otherwise, and the classification changes both the rules the organization lives under and the tax treatment its donors receive.
To qualify as a public charity, an organization generally must receive at least one-third of its financial support from the general public, measured over a five-year period. Organizations that fall short of one-third may still qualify under a 10-percent facts-and-circumstances test. A separate public support test applies to organizations that combine public contributions with revenue from mission-related activities, requiring more than one-third of support from those combined sources.
Private foundations operate under stricter rules than public charities:
- They must distribute at least 5% of their net investment assets each year. Public charities have no such requirement.
- They pay a 1.39% excise tax on net investment income. Public charities generally do not.
- Transactions between the foundation and its founders, board members, or major donors are prohibited outright. Public charities face similar but less rigid rules.
- Their holdings in a for-profit company are capped. Public charities face no such cap.
- They cannot lobby or support political activities at all. Public charities can engage in limited lobbying.
What Donors Get
The tax deduction for donors is one of the main practical reasons the status matters. For contributions to public charities, donors who itemize can generally deduct up to 50% of their adjusted gross income. Contributions to private foundations carry a lower ceiling of 30% of AGI.
Starting in tax year 2026, taxpayers who take the standard deduction can also claim a limited charitable deduction for the first time since the pandemic-era version expired. Non-itemizers may deduct up to $1,000 in cash contributions to qualifying public charities, or $2,000 for married couples filing jointly. Donations to donor-advised funds and supporting organizations don’t count toward this deduction.
The deduction applies only to contributions made to organizations the IRS has formally recognized. A state-incorporated nonprofit still waiting on its determination letter cannot offer tax-deductible donations, which is why the federal application step matters so much for fundraising.
What a 501(c)(3) Cannot Do
Keeping the status means staying within boundaries the IRS enforces. Four in particular define the shape of the rule.
No Private Benefit
None of the organization’s net earnings may benefit any private individual, including founders, board members, or their families. The rule targets excessive compensation, sweetheart contracts, and any arrangement where insiders extract personal profit from the organization’s revenue. Violations can lead to revocation of tax-exempt status and excise taxes imposed on the individuals who received the improper benefits.
No Political Campaign Activity
The prohibition on political campaign activity is absolute. A 501(c)(3) cannot support or oppose any candidate for public office, whether through financial contributions, public endorsements, or distributing statements favoring one candidate over another. There is no safe harbor, no de minimis exception, and no workaround. Violations can result in revocation and excise taxes on the organization.
Limited Lobbying
Lobbying to influence legislation is allowed, but it cannot be a substantial part of the organization’s activities. What counts as “substantial” isn’t precisely defined, which is where organizations get into trouble. Groups that expect to do significant advocacy work can make a 501(h) election, which replaces the vague “substantial part” test with specific dollar thresholds tied to the organization’s budget.
Unrelated Business Income Is Still Taxable
Being tax-exempt does not exempt every dollar of revenue. If a nonprofit runs a side activity that is regularly carried on and not substantially related to its exempt purpose, the profits are taxable. Any organization with $1,000 or more in gross income from unrelated business activities must file Form 990-T and pay tax on that income. Volunteer-run activities, certain donated-goods sales, and income from activities conducted primarily for the convenience of members are among the common exceptions.
How an Organization Becomes a 501(c)(3)
The path runs through the state first and then the IRS. After incorporating at the state level and obtaining an Employer Identification Number, the organization files an application with the IRS: either Form 1023 or the streamlined Form 1023-EZ. Both are submitted electronically through Pay.gov; there is no paper filing option.
Form 1023-EZ is available only to smaller organizations. The gross receipts limit is $50,000 for each of the past three years and for each of the next three projected years, and total assets cannot exceed $250,000. The user fee is $275. Everyone else files the full Form 1023, which requires a detailed narrative of activities, financial history or projections, and information about compensation arrangements. The user fee for the full form is $600. Neither fee is refundable if the application is denied.
The articles of incorporation need to contain specific language the IRS looks for: a purpose clause stating that the organization is formed exclusively for one or more exempt purposes under Section 501(c)(3), and a dissolution clause directing that assets go to another 501(c)(3) or to a government entity for a public purpose if the organization shuts down. Missing either clause is one of the most common reasons applications stall.
A successful application produces a determination letter confirming the exemption and stating whether the organization is a public charity or a private foundation. That letter is what donors and grant-making foundations look for before writing checks.
Keeping the Status
The determination letter is not the finish line. Every 501(c)(3) must file an annual return with the IRS, with the specific form depending on size:
- Form 990-N (the e-Postcard) for organizations with gross receipts averaging $50,000 or less over the prior three years.
- Form 990-EZ for organizations with gross receipts under $200,000 and total assets under $500,000.
- Form 990 for organizations with gross receipts of $200,000 or more, or total assets of $500,000 or more.
The penalty for ignoring the filing rule is unforgiving. If an organization fails to file a required annual return or notice for three consecutive years, the IRS automatically revokes its tax-exempt status. There is no warning letter. Automatic revocation means the organization owes federal income tax on its revenue going forward, and donors can no longer deduct their contributions until the status is reinstated.
501(c)(3) organizations also have to make certain documents available on request, including the original exemption application with supporting documents and the three most recent annual returns with all schedules and attachments. Public charities do not have to disclose donor names and addresses. Private foundations do.