Nonprofit Form 990 Filing Guide: Which Version, What It Discloses, and What Triggers an Audit

The annual information return for tax-exempt organizations is Form 990, and the IRS uses it as its primary window into whether the organization is operating consistently with its exempt purpose. The form is not a tax return in the traditional sense (most 501(c)(3) organizations do not owe income tax on their exempt-function income), but it is a public document, and the consequences for getting it wrong range from penalties to automatic revocation of exempt status. The most common mistake is not filing it at all: under IRC 6033(j), an organization that fails to file for three consecutive years automatically loses its tax-exempt status, with no notice and no appeal other than retroactive reinstatement (which is discretionary, not guaranteed).

Which version of Form 990 does my nonprofit file?

The IRS offers three versions, and the filing threshold determines which one your organization uses.

Form 990-N (e-Postcard): For organizations with gross receipts normally $50,000 or less. This is the simplest filing, done entirely online through the IRS website. It requires only basic identifying information (name, EIN, address, principal officer, confirmation that gross receipts are $50,000 or less, and a website URL if applicable). There is no financial reporting. The “normally” qualifier means the IRS looks at a multi-year average, not a single year: if an organization’s gross receipts have averaged $50,000 or less over its most recent three tax years, it qualifies for the 990-N even if one individual year exceeded the threshold.

Form 990-EZ: For organizations with gross receipts less than $200,000 and total assets less than $500,000 at end of year. This is a shortened version of the full 990, requiring summary financial information (revenue by category, expenses by category, balance sheet), a list of officers and directors with compensation, and responses to the governance and compliance questions. It is significantly less detailed than the full 990 but still requires proper accounting.

Form 990: For organizations with gross receipts of $200,000 or more, or total assets of $500,000 or more. The full form is 12 pages before schedules, and most organizations attach several schedules (Schedule A for public charity status, Schedule B for contributors, Schedule D for supplemental financial statements, Schedule O for supplemental information). The full 990 requires a complete statement of revenue, a functional expense allocation (program services, management and general, fundraising), a balance sheet, and detailed disclosure of compensation, governance, and related-party transactions.

The due date is the 15th day of the 5th month after the end of the organization’s fiscal year. For a calendar-year organization, that is May 15. An automatic 6-month extension is available by filing Form 8868 before the due date, extending the deadline to November 15.

What happens if we do not file?

The penalty for late filing of Form 990 or 990-EZ is $20 per day for each day the return is late, up to the lesser of $10,500 or 5% of the organization’s gross receipts for the year (for organizations with gross receipts under $1,181,000; larger organizations face a $110/day penalty up to $56,000). These penalties apply to the organization, and the IRS can also assess a $10/day penalty against the individual responsible for the failure to file (up to $5,000 per return) under IRC 6652(c).

The more severe consequence is automatic revocation. Under IRC 6033(j), enacted in 2006, any organization that fails to file its required annual return (990, 990-EZ, or 990-N) for three consecutive years loses its tax-exempt status automatically, effective as of the due date of the third missed return. The revocation is not discretionary; the IRS does not send a warning or provide a cure period. The organization simply appears on the IRS’s auto-revocation list.

Once revoked, the organization must file a new application for exemption (Form 1023 or 1023-EZ, with the associated user fee of $600 or $275) and may need to file taxable returns (Form 1120) for the period between revocation and reinstatement. Retroactive reinstatement is available in some cases (within 15 months of the revocation, or longer if reasonable cause is demonstrated), but it requires the organization to file all delinquent returns and convince the IRS that the failure was due to reasonable cause.

What does Schedule A require for public charity status?

Most 501(c)(3) organizations are public charities, not private foundations. The distinction matters because private foundations face restrictions on self-dealing, mandatory minimum distributions, excise taxes on investment income, and limits on business holdings that do not apply to public charities.

Schedule A is where the organization demonstrates it qualifies as a public charity. The most common tests:

The public support test (IRC 509(a)(1) / IRC 170(b)(1)(A)(vi)): The organization receives a substantial part of its support from public sources (government grants, contributions from the general public) rather than from investment income or a few large donors. The threshold is typically 33 1/3% of total support from public sources over a five-year measuring period. An organization that falls between 10% and 33 1/3% can still qualify if it passes a facts-and-circumstances test showing it is organized and operated to attract public support.

The gross receipts test (IRC 509(a)(2)): The organization receives more than one-third of its support from contributions, membership fees, and gross receipts from activities related to its exempt purpose, and receives no more than one-third from gross investment income and unrelated business taxable income.

Supporting organization (IRC 509(a)(3)): The organization is organized and operated exclusively to support one or more public charities. This classification is complex and has been subject to significant restrictions since the Pension Protection Act of 2006.

Schedule A computes the public support percentage over a rolling five-year period and reports whether the organization meets the threshold. If the organization fails the public support test, it reclassifies as a private foundation, with all the attendant restrictions. The reclassification is not immediate (there is a two-year grace period for a new organization, and the five-year rolling average provides a buffer), but it is a significant risk for organizations that depend on a small number of major donors.

What compensation gets disclosed and why does it matter?

Part VII of Form 990 requires disclosure of compensation paid to officers, directors, trustees, key employees, and the five highest-compensated employees (if compensated more than $100,000). This includes salary, bonus, deferred compensation, nontaxable benefits, and compensation from related organizations. The data is public, and the IRS uses it as the primary trigger for excess benefit transaction inquiries.

Under IRC 4958, an excess benefit transaction occurs when a disqualified person (someone with substantial influence over the organization) receives compensation or other economic benefits from the organization that exceed the value of what they provided in return. If the IRS determines that compensation is excessive, the disqualified person owes a 25% excise tax on the excess amount (and 200% if not corrected within the taxable period), and the organization manager who knowingly approved it owes a 10% excise tax (up to $20,000 per transaction).

The defense against an IRC 4958 challenge is the “rebuttable presumption of reasonableness.” The organization creates this presumption by: (1) having the compensation approved by an authorized body (the board or a compensation committee) composed entirely of individuals with no conflict of interest, (2) obtaining and relying on appropriate comparability data (compensation surveys, Form 990 data from similar organizations, written offers from similar organizations), and (3) documenting the basis for the decision contemporaneously. If all three conditions are met, the IRS bears the burden of proving the compensation was excessive. If any condition is missing, the burden falls on the organization.

What is unrelated business income and when do we file Form 990-T?

Tax-exempt organizations owe income tax on unrelated business income (UBI) under IRC 511. UBI is income from a trade or business that is regularly carried on and not substantially related to the organization’s exempt purpose. The organization files Form 990-T to report UBI and pays tax at the corporate rate (21% for organizations taxed as corporations).

Common sources of UBI for nonprofits: rental income from debt-financed property (the portion attributable to the debt under IRC 514), advertising revenue in publications, revenue from services provided to non-members, and income from regularly conducted commercial activities unrelated to the exempt purpose.

Common exclusions: passive investment income (dividends, interest, royalties, capital gains) is generally excluded under IRC 512(b). Rental income from real property is excluded unless the property is debt-financed. Income from activities staffed substantially by volunteers is excluded. Revenue from selling donated merchandise (like a thrift store) is excluded. And convenience income (activities carried on primarily for the convenience of members, students, or employees, such as a university bookstore) is excluded.

An organization with $1,000 or more of gross UBI must file Form 990-T. The $1,000 threshold applies to gross income, not net income, so an activity with $2,000 in revenue and $3,000 in expenses still triggers the filing requirement (even though the net UBI is zero and no tax is owed).

How does public inspection work?

Form 990, 990-EZ, 990-T (for 501(c)(3) organizations), and the exemption application (Form 1023 or 1023-EZ) are public documents. The organization must make them available for public inspection at its principal office during regular business hours, and must provide copies upon written request within 30 days (a reasonable copying fee is permitted). Organizations that post their returns on a widely available website (such as their own site, or through GuideStar/Candid) satisfy the inspection requirement without providing individual copies.

Schedule B (the contributor schedule) is an exception: the names and addresses of contributors are not open to public inspection for most organizations. The IRS receives the full schedule, but the publicly available version redacts contributor names and addresses. This was reinforced by the Supreme Court’s decision in Americans for Prosperity Foundation v. Bonta (2021), which struck down California’s requirement that charities disclose their major donors to the state.

The practical reality is that every Form 990 filed by a 501(c)(3) organization ends up on GuideStar/Candid (now Candid), ProPublica’s Nonprofit Explorer, and other aggregator sites within months of filing. Donors, grant-makers, journalists, and watchdog organizations routinely review 990s. The compensation disclosures, the ratio of program expenses to total expenses, and the governance disclosures are the most closely scrutinized sections.

What should I do next?

If your nonprofit has not filed for the current year, file before the three-consecutive-year clock creates an automatic revocation. If you have been filing the wrong version (990-N when you should be filing 990-EZ or full 990), the correction is to file the correct version for the current year and amend prior years if material. If your board has not documented the basis for executive compensation, establish the rebuttable presumption process before the next compensation decision.

• Nonprofit UBIT, when tax-exempt organizations owe income tax on unrelated business income (the Form 990-T companion to the 990)
• Nonprofit governance and conflict of interest, the Part VI governance questions, conflict of interest policy, and compensation oversight
• Church bookkeeping and fund accounting, the parallel guide for churches (which are exempt from 990 filing but share the fund accounting structure)
• Nonprofit ERC eligibility, the Employee Retention Credit analysis for tax-exempt organizations
• Trust fund recovery penalty, personal liability for nonprofits that fall behind on employment taxes
• IRS accuracy-related penalty, reasonable cause defense for any filing error
• IOLTA trust accounting for law firms, another fiduciary obligation with public disclosure implications
• IRS penalty abatement letter, how to request removal of the late-filing penalty

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.