What Is IRS Publication 557? Rules, Filings, and Revocation

IRS Publication 557, Tax-Exempt Status for Your Organization, is the agency’s plain-language reference for nonprofits seeking or maintaining federal tax exemption. It explains which organizations qualify under Internal Revenue Code Section 501(a), how to apply for recognition, what returns must be filed each year, and what conduct can cause an organization to lose its exempt status.¹ A tax-exempt organization owes no federal income tax on income tied to its exempt purpose, and in many cases donors can deduct the gifts they make to it.

If you run a nonprofit, treat Publication 557 as a map. The sections below walk through the parts that matter most: where your organization fits, how to get recognized, how to keep the status, and what to do if you lose it.

The 501(c) Categories Publication 557 Covers

Section 501(c) of the Internal Revenue Code lists more than two dozen categories of exempt organizations, and your organization has to fit cleanly into one of them. Three come up most often.

Section 501(c)(3) is the familiar one. It covers groups organized and operated exclusively for religious, charitable, scientific, literary, or educational purposes, plus those testing for public safety, fostering amateur sports, or preventing cruelty to children or animals.² Two conditions always apply: no part of the earnings can benefit a private individual, and the organization cannot participate in political campaigns.³ In return, most 501(c)(3) organizations can receive tax-deductible contributions, which other categories generally cannot.

Section 501(c)(4) covers civic leagues and social welfare organizations that promote community welfare.⁴ These groups have more latitude for political and lobbying activity, but donations to them are generally not deductible.

Section 501(c)(6) covers business leagues, chambers of commerce, real estate boards, and boards of trade. Their purpose must be improving business conditions generally, not running a business for profit.⁵

Public Charity or Private Foundation

Every 501(c)(3) is further classified as either a public charity or a private foundation, and the IRS treats you as a private foundation by default unless you show otherwise.⁶ Public charity status generally requires that at least one-third of your support come from the general public, government, or a mix of public donations and program revenue. Private foundations face tighter operating rules, annual distribution requirements, self-dealing restrictions, and a 1.39% excise tax on net investment income that public charities do not pay.⁷

The Two Tests Every 501(c)(3) Must Pass

Publication 557 is explicit that qualifying for 501(c)(3) status means passing two separate tests. Fail either one and the exemption is gone.

The organizational test looks at your founding documents. Your articles of incorporation or trust agreement must limit the organization’s purposes to those allowed under 501(c)(3) and must not authorize more than an insubstantial amount of non-exempt activity.⁸ The documents must also permanently dedicate the organization’s assets to an exempt purpose through a dissolution clause stating that if the organization closes, its remaining assets go to another 501(c)(3), to the federal government, or to a state or local government for a public purpose.⁹ Missing or vague dissolution language is one of the most common reasons applications get delayed or denied.

The operational test looks at what you actually do. The organization has to spend its time and resources primarily on exempt activities. Documents that say the right things cannot save an organization whose real-world operations serve private interests or generate profit for insiders.³

Applying for Recognition

Before anything goes to the IRS, the organization must already exist under state law. Then obtain an Employer Identification Number. The clock on IRS filing obligations starts when you get the EIN, so applying for one before the organization is legally formed can create problems.¹⁰

Form 1023 or Form 1023-EZ

Most 501(c)(3) applicants file either the full Form 1023 or the streamlined Form 1023-EZ.¹¹ The 1023-EZ is open to smaller organizations projecting annual gross receipts of $50,000 or less for each of the next three years and holding total assets of $250,000 or less.¹² The user fee is $275 for Form 1023-EZ and $600 for the full Form 1023.¹³ Both forms are filed electronically through Pay.gov.

Organizations above those thresholds, or specifically ineligible for the 1023-EZ (hospitals and credit counseling services, for example), must file the full Form 1023. It calls for organizing documents, bylaws, a detailed narrative of past and planned activities, and several years of financial data. IRS review of the full application routinely takes six months or longer.

Who Doesn’t Have to Apply

Not every organization has to file. Churches, synagogues, mosques, temples, and their integrated auxiliaries are automatically treated as tax-exempt under 501(c)(3) without filing Form 1023.¹⁴ So are organizations other than private foundations with annual gross receipts normally $5,000 or less. Many file anyway, because a formal determination letter reassures donors that their contributions are deductible.

The 27-Month Window

Timing matters. An organization that files its application within 27 months of the end of the month it was formed can receive tax-exempt status retroactive to the date of formation. File later than that and the IRS generally recognizes the exemption only from the filing date forward, leaving a gap during which the organization may owe tax on income it received.¹⁵

Keeping the Exemption: Annual Filings

Recognition is the start, not the finish. Keeping exempt status requires annual filings, and the penalties for ignoring them are severe.

The Form 990 Series

Most exempt organizations file an annual information return from the Form 990 series, with the right form depending on size:¹⁶

Form 990-N (e-Postcard) for organizations with annual gross receipts normally $50,000 or less.
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 return is due on the 15th day of the fifth month after the end of your fiscal year, which is May 15 for calendar-year organizations.¹⁷ Extensions are available for Forms 990 and 990-EZ, but not for the 990-N.

Miss three consecutive annual returns and the organization automatically loses its exempt status. No warning letter, no grace period. The revocation takes effect on the filing due date of the third missed return.¹⁸

Unrelated Business Income

Tax-exempt status does not shelter every dollar you earn. Income from a trade or business regularly carried on that is not substantially related to your exempt purpose is subject to unrelated business income tax.¹⁹ If your gross income from unrelated business activity reaches $1,000 or more, you must file Form 990-T and pay the tax. If estimated tax for the year will be $500 or more, quarterly estimated payments are required too.²⁰

Public Inspection

You must make your three most recent annual returns and your original exemption application available for public inspection at your principal office during regular business hours. You must also provide copies on request, though you can charge a reasonable fee for reproduction and postage.²¹ Refusal costs $20 per day the failure continues, up to $10,000 per return. Willful violations carry a separate $5,000 penalty.²²

What Can Cost You the Exemption

Publication 557 flags several activities that can jeopardize exempt status, especially for 501(c)(3) organizations. Some are absolute prohibitions. Others are guardrails with escalating consequences.

Political Campaign Activity

The ban on political campaign activity is absolute for 501(c)(3) organizations. You cannot support or oppose any candidate for public office through contributions, endorsements, or campaign materials. There is no safe-harbor amount, and a single endorsement can trigger revocation.²

Private Inurement and Intermediate Sanctions

No part of a 501(c)(3) organization’s earnings can benefit a private individual, such as a founder, officer, or board member, beyond reasonable compensation for actual services.³ Even a small amount can be grounds for revoking the exemption entirely.

In practice, the IRS often uses intermediate sanctions under Section 4958 instead of pulling the exemption. When an insider receives an excess benefit, the insider (not the organization) pays an excise tax of 25% of the excess. If the transaction is not corrected within a set period, a second-tier tax of 200% applies. Organization managers who knowingly approved the transaction can also be penalized.²³

Lobbying

Lobbying, unlike campaigning, is not completely off-limits. The default rule, the substantial part test, says lobbying cannot be a substantial part of what the organization does. “Substantial” is not defined by a bright line, and the IRS decides case by case.³

Many organizations file an election under Section 501(h) to replace that vague standard with specific dollar limits tied to their total exempt-purpose expenditures. The allowed lobbying share starts at 20% for organizations spending up to $500,000 and tapers through higher brackets to an absolute cap of $1,000,000 for the largest organizations.²⁴ Churches and private foundations cannot make the 501(h) election.

Too Much Unrelated Business

Earning some unrelated business income does not by itself threaten your exemption; the income is just taxed. The risk comes when unrelated business activity grows large enough to overshadow the exempt purpose, at which point the IRS can conclude the organization is no longer primarily operated for exempt purposes and revoke the status.¹⁹

Getting Exempt Status Back After Revocation

Losing exempt status to the three-year filing failure is not necessarily permanent. The IRS offers several reinstatement paths, and how quickly you move determines whether reinstatement can be retroactive to the revocation date.²⁵

The most favorable path is streamlined retroactive reinstatement, open to organizations that were eligible to file Form 990-EZ or 990-N during the missed years and have not been automatically revoked before. You must submit a new application (Form 1023, 1023-EZ, 1024, or 1024-A) with the required fee within 15 months of the later of the revocation letter date or the date your organization appeared on the IRS Revocation List. The IRS waives penalties for the missed returns.

Organizations that miss the 15-month window or do not qualify for the streamlined process can still apply for retroactive reinstatement, but they must show reasonable cause for at least one year of the filing failure and file all delinquent returns before submitting the application.²⁶

Any organization can apply for reinstatement at any time. When no retroactive option is available, the organization can file a new application and receive exempt status going forward from the application date, with the gap period remaining taxable. The IRS publishes and maintains a public list of all organizations whose exempt status has been revoked, so donors and grantmakers can check before giving.

1
Internal Revenue Service. Publication 557 – Tax-Exempt Status for Your Organization
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Office of the Law Revision Counsel. 26 USC 501 – Exemption From Tax on Corporations, Certain Trusts, Etc.
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Internal Revenue Service. Exemption Requirements – 501(c)(3) Organizations
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Internal Revenue Service. Types of Organizations Exempt Under Section 501(c)(4)
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Internal Revenue Service. Types of Organizations Exempt Under Section 501(c)(6)
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Office of the Law Revision Counsel. 26 USC 509 – Private Foundation Defined
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Internal Revenue Service. Tax on Net Investment Income
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Internal Revenue Service. Organizational Test – Internal Revenue Code Section 501(c)(3)
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Internal Revenue Service. Does the Organizing Document Contain the Dissolution Provision Required Under Section 501(c)(3)
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Internal Revenue Service. Obtaining an Employer Identification Number for an Exempt Organization
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Internal Revenue Service. About Form 1023, Application for Recognition of Exemption Under Section 501(c)(3)
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Internal Revenue Service. Instructions for Form 1023-EZ
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Internal Revenue Service. User Fees for Tax Exempt and Government Entities Division
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Internal Revenue Service. Organizations Not Required to File Form 1023
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Internal Revenue Service. Form 1023 – Purpose of Questions About Organization Applying More Than 27 Months After Date of Formation
16
Internal Revenue Service. Form 990 Series – Which Forms Do Exempt Organizations File
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Internal Revenue Service. Return Due Dates for Exempt Organizations – Annual Return
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Office of the Law Revision Counsel. 26 USC 6033 – Returns by Exempt Organizations
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Internal Revenue Service. Unrelated Business Income Defined
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Internal Revenue Service. Unrelated Business Income Tax
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eCFR. 26 CFR 301.6104(d)-1 – Public Inspection and Distribution of Applications for Tax Exemption and Annual Information Returns of Tax-Exempt Organizations
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Internal Revenue Service. Political Organization Filing Requirements – Penalties for Failing to Make Forms 990 Publicly Available
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Internal Revenue Service. Intermediate Sanctions
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Internal Revenue Service. Measuring Lobbying Activity – Expenditure Test
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Internal Revenue Service. Automatic Revocation – How to Have Your Tax-Exempt Status Reinstated
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Internal Revenue Service. Revenue Procedure 2014-11