A 501(c)(3) organization files an annual return in the IRS Form 990 series. Which version depends on size: the Form 990-N e-Postcard for the smallest groups, Form 990-EZ for mid-sized ones, and the full Form 990 for larger organizations. Private foundations file Form 990-PF instead, and a 501(c)(3) may owe several other forms on top of the annual return depending on what it does during the year.
Which Form 990 Version to File
The Form 990 series is not an income tax return in the usual sense. These are information returns that disclose how the organization is governed, what it raised and spent, and whether it is operating consistently with its exempt purpose. The IRS sorts filers by gross receipts and total assets.
Form 990-N (the e-Postcard)
An organization whose gross receipts are normally $50,000 or less files Form 990-N, an electronic-only notice sometimes called the e-Postcard.1Internal Revenue Service. Annual Electronic Filing Requirement for Small Exempt Organizations – Form 990-N (e-Postcard) It asks for eight pieces of basic information, including the organization’s name, address, employer identification number, and confirmation that gross receipts fall below the threshold.
Form 990-EZ
An organization with gross receipts under $200,000 and total assets under $500,000 can file Form 990-EZ. Both conditions must be met; exceeding either one pushes you up to the full return.2Internal Revenue Service. 2025 Instructions for Form 990-EZ – Short Form Return of Organization Exempt From Income Tax The EZ requires reporting on revenue, expenses, balance sheet data, and compensation paid to officers, directors, and key employees.
Form 990 (the Full Return)
An organization with gross receipts of $200,000 or more, or total assets of $500,000 or more, files the full Form 990. Either threshold on its own is enough to require it.2Internal Revenue Service. 2025 Instructions for Form 990-EZ – Short Form Return of Organization Exempt From Income Tax The full Form 990 covers program accomplishments, governance policies, compensation practices, and financial statements. Public charities also complete Schedule A, documenting their public support.
When It’s Due
Every version of the return is due by the 15th day of the 5th month after the fiscal year ends. For a calendar-year organization, that’s May 15.3Internal Revenue Service. Annual Exempt Organization Return: Due Date All 990 series returns must be filed electronically under the Taxpayer First Act; paper filing is no longer accepted.4Internal Revenue Service. E-File for Charities and Nonprofits If you need more time, Form 8868 grants an automatic six-month extension, but it has to be filed before the original due date, and any tax owed still has to be paid by that original date.5Internal Revenue Service. Instructions for Form 8868 (Rev. January 2026)
These returns are public documents. Donors, journalists, and watchdog groups routinely pull them from online databases to evaluate nonprofits.
Private Foundations File Form 990-PF
Not every 501(c)(3) is a public charity. An organization classified as a private foundation, meaning it does not meet any of the public support tests or other exceptions under Section 509(a), files Form 990-PF instead of Form 990.6Internal Revenue Service. Instructions for Form 990-PF (2025) This trips people up because a determination letter may say “501(c)(3)” without making the public charity versus private foundation distinction obvious. Check the letter itself; it identifies which category applies. Private foundations have their own excise tax and distribution rules, and the 990-PF collects information specific to those.
Churches and Other Organizations Exempt From Filing
A small number of 501(c)(3) organizations don’t have to file any Form 990 series return at all. The main group is churches, their integrated auxiliaries, and conventions or associations of churches.7Internal Revenue Service. Filing Requirements for Churches and Religious Organizations Even so, these organizations still file Form 990-T if they have unrelated business income, and they still handle the usual employment tax filings if they have employees.
Other Forms a 501(c)(3) May Also Owe
The annual 990 is the baseline. Several other forms come into play depending on what happens during the year.
Form 990-T for Unrelated Business Income
Tax-exempt doesn’t mean tax-free on everything. Income from a trade or business that is regularly carried on and not substantially related to the exempt purpose is taxable. You report it on Form 990-T, and filing is required if gross income from unrelated business activities is $1,000 or more.8Internal Revenue Service. Instructions for Form 990-T, Exempt Organization Business Income Tax Return Unlike the 990 series, the 990-T is a real tax return that calculates tax owed. Organizations structured as corporations pay at the 21 percent corporate rate; those structured as trusts use the trust rate schedule, which reaches 37 percent at relatively low income levels. The 990-T is filed in addition to the annual information return, not in place of it. If you expect to owe $500 or more in unrelated business income tax for the year, you also make quarterly estimated payments.9Internal Revenue Service. Estimated Tax: Unrelated Business Income
Employment Taxes and Contractor Reporting
A 501(c)(3) with employees handles federal employment taxes the same way any business does. Form 941 is filed quarterly to report withheld income tax and both shares of Social Security and Medicare.10Internal Revenue Service. About Form 941, Employer’s Quarterly Federal Tax Return Form W-2 goes to each employee by January 31 of the following year.11Social Security Administration. Deadline Dates to File W-2s For independent contractors, Form 1099-NEC generally reports payments of $600 or more to an individual, partnership, or estate.12Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC (04/2025) Payments to corporations are generally exempt from 1099 reporting, but payments to attorneys must always be reported regardless of the attorney’s business structure.
Form 4720 for Excise Taxes on Insider Transactions
When insiders benefit at the organization’s expense, the IRS imposes steep excise taxes. For public charities, the common trigger is an excess benefit transaction, meaning any deal where a disqualified person (such as a board member or senior officer) receives compensation or other economic benefits worth more than what the organization received in return. The disqualified person owes an initial excise tax of 25 percent of the excess benefit, and any manager who knowingly approved the transaction owes 10 percent.13Office of the Law Revision Counsel. 26 U.S. Code 4958 – Taxes on Excess Benefit Transactions If the disqualified person doesn’t correct the transaction within the allowed period, an additional 200 percent tax applies. These excise taxes are reported and paid on Form 4720. Private foundations face additional triggers on the same form, including self-dealing between the foundation and its disqualified persons.14Internal Revenue Service. Instructions for Form 4720
Form 8282 for Sold Donated Property
If your organization sells or otherwise disposes of donated property within three years of receiving it, and the property had a claimed value above $5,000 at the time of the gift, you file Form 8282 within 125 days of the disposition.15Internal Revenue Service. Form 8282 (Rev. October 2021) – Donee Information Return The IRS uses this to cross-check the donor’s original charitable deduction, so accuracy matters for both the organization and the donor. A copy of the completed form also goes to the original donor.
What Happens If You Don’t File
Late filings add up quickly. For tax year 2025 returns, an organization that files late without reasonable cause faces a penalty of $25 per day, up to the lesser of $13,000 or 5 percent of gross receipts for the year. Organizations with annual gross receipts above $1,309,500 face $130 per day, up to $65,000.16Internal Revenue Service. 2025 Instructions for Form 990 Return of Organization Exempt From Income Tax These amounts are adjusted for inflation each year, so check the current instructions for your filing year. If the IRS sends a notice demanding a return and sets a deadline, any responsible person within the organization who fails to comply can be charged personally at $10 per day, up to $5,000.17Internal Revenue Service. Annual Exempt Organization Return: Penalties for Failure to File
The worst consequence is automatic revocation. Any exempt organization that fails to file a required return or notice for three consecutive years loses its tax-exempt status by operation of law, effective on the original due date of the third missed return.18Internal Revenue Service. Automatic Revocation of Exemption Reinstating exempt status after revocation generally means filing a new Form 1023 or 1023-EZ and paying the user fee again. Donations received during the gap aren’t deductible to the donors, which can seriously damage donor relationships. Even the smallest organizations, the ones that owe only the 990-N, hit this cliff after three missed years, so the e-Postcard is worth putting on a calendar reminder.