A not-for-profit organization is a legal entity that operates for a purpose other than generating wealth for its owners or members. The defining federal rule is simple: any money left over after expenses must stay inside the organization and fund its mission, not flow to the people who control it. The IRS recognizes more than two dozen categories of tax-exempt not-for-profit organizations under Section 501(c) of the Internal Revenue Code, covering charities, churches, social welfare groups, trade associations, and social clubs, among others.1Office of the Law Revision Counsel. 26 U.S.C. 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
The Rule That Defines the Category
Legal scholars call it the non-distribution constraint. A for-profit company can pay dividends to shareholders or hand profits to owners. A not-for-profit cannot. Whatever revenue remains after covering costs has to stay inside the organization, supporting more programs, building reserves, or investing in future work.
This does not mean the books have to zero out each year. A not-for-profit is allowed to bring in more than it spends. The constraint governs where the surplus goes, not whether one exists. Employees and executives can be paid, but that compensation has to reflect the fair market value of the work.2Internal Revenue Service. Exempt Organization Annual Reporting Requirements: Meaning of Reasonable Compensation Inflated salaries used as a back-door way to distribute money to insiders are exactly what the rule exists to catch.
The Main Federal Categories
Being organized as a nonprofit under state law does not, on its own, make an organization tax-exempt. That comes from a separate IRS determination under one of the Section 501(c) categories. Three come up most often.
501(c)(3) Charitable Organizations
This is what most people picture when they hear “nonprofit.” It covers organizations operated exclusively for charitable, religious, educational, scientific, or literary purposes. The signature benefit is that donors can deduct their contributions on their federal income tax returns, which makes fundraising much easier. In exchange, the organization accepts two hard limits: it cannot devote a substantial part of its activities to lobbying, and it is absolutely prohibited from participating in political campaigns for or against any candidate.1Office of the Law Revision Counsel. 26 U.S.C. 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
Organizations apply using Form 1023, or the streamlined Form 1023-EZ for smaller applicants. The user fee is $600 for Form 1023 and $275 for Form 1023-EZ.3Internal Revenue Service. Form 1023 and 1023-EZ: Amount of User Fee
501(c)(4) Social Welfare Organizations
Social welfare organizations promote community well-being through advocacy, community improvement, or civic engagement. The biggest practical difference from a 501(c)(3) is that donations to a 501(c)(4) are not tax-deductible for the donor. In return, the organization gets much wider latitude: it can lobby extensively and even engage in some political campaign activity, as long as political intervention is not its primary activity.1Office of the Law Revision Counsel. 26 U.S.C. 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
501(c)(7) Social Clubs
Country clubs, hobby groups, and fraternal organizations often organize under 501(c)(7). These entities avoid corporate income tax on membership dues and fees collected from members for club activities. The exemption does not cover income from non-members, such as renting the clubhouse for outside events, which may trigger unrelated business income tax.1Office of the Law Revision Counsel. 26 U.S.C. 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
Lobbying and Political Activity
The rules on political and legislative activity trip up more organizations than almost any other compliance issue, and they differ sharply by category.
For a 501(c)(3), campaigning for or against any candidate for public office is flatly prohibited. This is not a percentage-of-activities test. Any amount of campaign intervention can lead to revocation of tax-exempt status and an excise tax on the money spent.4Internal Revenue Service. Frequently Asked Questions About the Ban on Political Campaign Intervention by 501(c)(3) Organizations – Consequences of Prohibited Activity No endorsements, no donations to candidates, no communications favoring one candidate over another. A pastor speaking in an official capacity cannot urge the congregation to support a particular candidate.
Lobbying is handled differently. A 501(c)(3) can lobby, just not as a substantial part of its activities. Organizations that want a cleaner line can file what is called a 501(h) election, which swaps the vague “substantial part” test for a concrete spending cap tied to exempt-purpose expenditures, with an overall ceiling of $1 million.5Internal Revenue Service. Measuring Lobbying Activity: Expenditure Test
A 501(c)(4) faces none of these lobbying caps. It can pour all its resources into legislative advocacy, and it can engage in political campaign activity as long as that activity stays secondary to its social welfare mission. That flexibility is why some advocacy groups pick a 501(c)(4) structure even though they lose the donor-deductibility benefit.
When a Nonprofit Still Owes Tax
Tax-exempt status does not mean zero federal tax in every situation. When a not-for-profit earns income from a business activity that is regularly carried on and not substantially related to its exempt purpose, that income is subject to unrelated business income tax, known as UBIT.6Internal Revenue Service. Unrelated Business Income Tax
An example. A museum that sells educational books in its gift shop is earning related income, because the books further its educational mission. If the same museum rents its parking lot to weekday commuters, that rental has nothing to do with art education and likely counts as unrelated business income. The tax runs at the standard 21 percent corporate rate, and any organization with $1,000 or more in gross unrelated business income has to file Form 990-T.7Office of the Law Revision Counsel. 26 U.S.C. 512 – Unrelated Business Taxable Income Organizations expecting to owe $500 or more in UBIT also make quarterly estimated payments, just like a for-profit business.
UBIT exists to keep tax-exempt organizations from using their tax advantage to undercut commercial competitors. A charity running a commercial bakery on the side should not get a built-in price edge over the taxed bakery down the street.
Insider Compensation and Excess Benefit Penalties
When an insider receives compensation or other benefits that exceed what the services are worth, the IRS treats it as an excess benefit transaction. Penalties target both the person who received the payment and the managers who approved it.
The person who received the excessive benefit owes an excise tax equal to 25 percent of the excess amount. Any organization manager who knowingly approved the transaction owes a separate tax of 10 percent of the excess, up to $20,000 per transaction. Those are the initial taxes. If the disqualified person does not return the excess before the IRS issues a formal deficiency notice, a second-tier tax of 200 percent of the excess kicks in.8Office of the Law Revision Counsel. 26 U.S.C. 4958 – Taxes on Excess Benefit Transactions A $100,000 overpayment left uncorrected can generate $225,000 in taxes on top of the required repayment.
These penalties were built as an alternative to the nuclear option of revoking exempt status entirely, which punishes the organization and its beneficiaries for the actions of a few insiders. Persistent or egregious violations can still result in revocation. Boards handle this by documenting compensation decisions, benchmarking pay against comparable organizations, and having disinterested members approve executive pay.
How a Not-for-Profit Comes Into Existence
Before applying for federal tax-exempt status, an organization has to exist as a legal entity under state law. Two paths are common. An unincorporated association is just a group of people who agree to work toward a shared goal without filing paperwork. It is easy to set up but offers weak liability protection because no separate legal entity stands between the organization’s obligations and members’ personal assets.
A non-stock corporation offers much stronger protection. Filing articles of incorporation (or a certificate of incorporation, depending on the state) creates a separate legal person that can own property, sign contracts, and take on debt in its own name. If someone sues the organization or it falls behind on bills, individual board members and volunteers are generally shielded from personal liability. Filing fees vary by state but tend to be modest. Those formation documents also define the organization’s purpose, governance structure, and rules for dissolution, all of which the IRS later reviews during the tax-exemption application.
The IRS specifically encourages adopting a written conflict-of-interest policy, giving the board a formal process for handling situations where a director or officer has a personal financial interest in a decision. Form 1023 asks about the policy directly, and the IRS treats it as a safeguard against private benefit.9Internal Revenue Service. Form 1023: Purpose of Conflict of Interest Policy
Annual Filings and Public Disclosure
Tax-exempt organizations file an annual information return with the IRS. The form depends on size:10Internal Revenue Service. Annual Filing and Forms the Form 990-N e-Postcard is available to organizations with annual gross receipts normally $50,000 or less;11Internal Revenue Service. Annual Electronic Filing Requirement for Small Exempt Organizations – Form 990-N (e-Postcard) Form 990-EZ handles mid-sized organizations; and the full Form 990 is the comprehensive return for larger ones, listing revenue, expenses, executive compensation, program accomplishments, and governance details.
Missing three consecutive annual returns triggers automatic revocation of tax-exempt status. No warning letter, no grace period, no discretion. Revocation takes effect on the filing due date of the third missed return.10Internal Revenue Service. Annual Filing and Forms Getting back in requires filing a new exemption application, paying the user fee again, and in most cases the reinstated status only takes effect from the date of the new application rather than retroactively.12Internal Revenue Service. Reinstatement of Tax-Exempt Status After Automatic Revocation Donations received during the revocation gap were not tax-deductible for donors, which can damage relationships and create fundraising problems.
Federal law also requires the organization to make certain documents available to anyone who asks. The exemption application and annual returns, including schedules, attachments, and the IRS determination letter, must be available for public inspection. Contributor names and addresses are generally redacted, except for private foundations.13Internal Revenue Service. Public Disclosure and Availability of Exempt Organizations Returns and Applications: Documents Subject to Public Disclosure Most organizations satisfy the requirement by posting their Form 990 on their website or through a service like GuideStar.
Federal tax-exempt status does not, on its own, authorize fundraising in every state. Most states have separate charitable solicitation laws requiring registration with a state agency before asking residents for donations, with exemptions and thresholds that vary widely.14Internal Revenue Service. Charitable Solicitation – State Requirements
What Happens When It Closes
When a not-for-profit shuts down, the remaining assets cannot be divided among board members or staff. For 501(c)(3) organizations, the IRS requires a dissolution clause in the organizing documents stating that assets will go to another 501(c)(3), to the federal government, or to a state or local government for a public purpose.15Internal Revenue Service. Does the Organizing Document Contain the Dissolution Provision Required Under Section 501(c)(3) The clause is checked during the initial exemption application and is not optional. That rule is the non-distribution constraint following the organization all the way to its exit: even at the end, the surplus cannot enrich the people who ran it.
Winding down also means notifying the IRS by filing a final return, checking the “Terminated” box on Form 990 or 990-EZ, or answering yes to the termination question on the e-Postcard. If the organization terminates before the end of its normal tax year, the final return is due by the 15th day of the fifth month after the termination date.16Internal Revenue Service. Termination of an Exempt Organization State dissolution requirements, including articles of dissolution with the secretary of state, run in parallel.