A 501(c)(3) determination letter is the one- to two-page notice on Department of the Treasury letterhead that the IRS sends an organization to confirm it qualifies for federal tax-exempt status under Section 501(c)(3) of the Internal Revenue Code. It lists the organization’s legal name, Employer Identification Number, effective date of exemption, public charity classification, whether donations are deductible, and whether an annual Form 990 is required. If you’ve just received one, need to produce one for a grantor, or want to check one someone else handed you, the details below cover what to look for and what to do next.
What the Letter Contains
The letter is addressed to the organization by legal name and mailing address, opens with “Dear Applicant,” and states that the IRS has determined the organization is exempt from federal income tax under Section 501(c)(3). A reference block in the upper right shows the EIN, an IRS contact person, a toll-free number (typically 1-877-829-5500), and the date issued. The Director of Exempt Organizations Rulings and Agreements signs it, and an enclosure page titled “Information for Organizations Exempt Under Section 501(c)(3)” usually comes with it.
The substantive information sits in a set of labeled fields. Each one tells you something specific:
- Employer Identification Number: the organization’s nine-digit tax ID, used to look it up in IRS databases.
- Effective Date of Exemption: the date from which the IRS recognizes the organization as tax-exempt. Filing within 27 months from the end of the month the organization was formed generally makes this date retroactive to formation; filing later usually sets it no earlier than the application submission date.1Internal Revenue Service. Form 1023 – Purpose of Questions About Organization Applying More Than 27 Months After Date of Formation
- Public Charity Status: the Internal Revenue Code section under which the organization is classified, such as 509(a)(1), 509(a)(2), or 509(a)(3). If no public charity classification appears, the organization is treated as a private foundation.2Office of the Law Revision Counsel. 26 USC 509 – Private Foundation Defined
- Contribution Deductibility: a “Yes” means donations qualify for deduction under IRC Section 170.3Office of the Law Revision Counsel. 26 USC 170 – Charitable, Etc., Contributions and Gifts
- Form 990 Required: whether the organization must file an annual information return. Most exempt organizations file some version of Form 990; very small ones file an electronic notice instead.
- Accounting Period Ending: the end of the organization’s fiscal year, which sets its annual filing deadline.
If a letter you’re looking at lacks the Treasury letterhead, the EIN block, or the director’s signature, treat it as suspect and verify through the IRS directly.
Public Charity vs. Private Foundation
The public charity line is more than a label. Donors giving cash to a public charity can deduct up to 60% of their adjusted gross income in a year. Donors giving cash to a private foundation face a 30% cap. For gifts of appreciated non-cash property, the limits are 30% for public charities and 20% for private foundations.4Internal Revenue Service. Publication 526 – Charitable Contributions
Most organizations applying through Form 1023 want a public charity classification because the higher deduction limits make them more attractive to donors and grantmakers. Public charities typically draw broad public support or support other public charities. Private foundations tend to be funded by a single source, such as one family or corporation. If the classification on your letter looks wrong, address it early; it shapes fundraising capacity and ongoing compliance.
How to Apply and Get a Determination Letter
The letter arrives after the IRS approves an application for tax-exempt status. Two forms exist, and eligibility depends on size.
Form 1023-EZ is the streamlined version. An organization can use it if projected annual gross receipts won’t exceed $50,000 in any of the next three years, gross receipts haven’t exceeded $50,000 in any of the past three years, and total assets don’t exceed $250,000.5Internal Revenue Service. Instructions for Form 1023-EZ The user fee is $275. The IRS issues about 80% of Form 1023-EZ determinations within 22 days.6Internal Revenue Service. Where’s My Application for Tax-Exempt Status
Form 1023 is the full application, required for larger organizations or those that don’t meet 1023-EZ eligibility. The user fee is $600.7Internal Revenue Service. Form 1023 and 1023-EZ – Amount of User Fee Processing runs considerably longer: as of early 2026, the IRS issues 80% of Form 1023 determinations within 191 days.6Internal Revenue Service. Where’s My Application for Tax-Exempt Status Complex structures or activities can stretch the wait further.
Getting a Copy If You’ve Lost Yours
Organizations should keep the original letter on file permanently, because grantmakers, banks, and state agencies routinely ask for it. If yours has gone missing, the path to a replacement depends on when the letter was issued.
For letters issued on or after January 1, 2014, you can download a copy through the IRS Tax Exempt Organization Search (TEOS) at no cost. For letters issued before 2014, submit Form 4506-B, Request for a Copy of Exempt Organization IRS Application or Letter.8Internal Revenue Service. EO Operational Requirements – Obtaining Copies of Exemption Determination Letter From IRS Form 4506-B also produces an affirmation letter, which serves the same purpose as the original for grantors and contributors.
How to Verify Another Organization’s Letter
If someone hands you a determination letter and you want to confirm it’s legitimate, the IRS Tax Exempt Organization Search tool is the reliable check. You can search by organization name or EIN and see whether the organization currently holds tax-exempt status, whether contributions are deductible, and whether the status has been revoked.8Internal Revenue Service. EO Operational Requirements – Obtaining Copies of Exemption Determination Letter From IRS
This matters more than people realize. A determination letter is a snapshot. An organization could have received a valid letter years ago and since lost its exempt status. TEOS shows the current picture, which is why experienced grantmakers check it rather than relying on a scanned letter alone.
Keeping the Exemption After You Get the Letter
Receiving the letter isn’t the end of the process. The organization must file an annual return or notice every year to keep its status. Organizations with gross receipts of $50,000 or more file Form 990 or Form 990-EZ; smaller ones file Form 990-N, the e-Postcard.9Internal Revenue Service. Exempt Organization Annual Filing Requirements Overview The return is due by the 15th day of the 5th month after the fiscal year ends. Form 8868 filed before the deadline gets a six-month extension.
Miss three consecutive years and the IRS automatically revokes exempt status. No warning, no appeal, no discretion; the revocation happens by operation of law.10Internal Revenue Service. Automatic Revocation of Exemption After revocation, the organization owes federal income tax on its earnings, donors can no longer deduct contributions, and the organization drops off the IRS public list. Small volunteer-run groups get caught by this often, usually because nobody knew the filing was required.
Reinstatement means filing a new application (Form 1023 or 1023-EZ) with the full user fee, plus catching up on all missed returns. Applying within 15 months of the revocation date and meeting certain conditions may get the status reinstated retroactively to the revocation date. After 15 months, retroactive reinstatement is harder to obtain and requires showing reasonable cause for the missed filings.11Internal Revenue Service. Automatic Revocation – How to Have Your Tax-Exempt Status Reinstated
Two Boundaries Worth Knowing
Not every 501(c)(3) organization has an individual determination letter. Churches, their integrated auxiliaries, and conventions or associations of churches are automatically considered tax-exempt under Section 501(c)(3) without applying to the IRS.12Internal Revenue Service. Churches, Integrated Auxiliaries and Conventions or Associations of Churches Donors can still deduct gifts to qualifying churches even without a letter, though many churches apply voluntarily to reassure donors and grantmakers. Organizations affiliated with a central body may also be covered by a group exemption letter, which works the same way as an individual letter but covers multiple subordinates at once.13Internal Revenue Service. Group Exemptions If you’re part of a denominational body or national association, check whether a group exemption already covers your chapter before filing on your own.
The determination letter also only addresses federal income tax. It does not exempt an organization from state sales tax, property tax, franchise tax, or any other state-level obligation.14Internal Revenue Service. Frequently Asked Questions About Applying for Tax Exemption Most states require a separate application for state exemptions, and some issue their own exemption numbers distinct from the federal EIN. If your organization earns revenue, owns property, or makes purchases, check with your state tax authority about what else you need to file.