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🏛️ How to Fax IRS Exempt Organizations (EO Determinations)

📅 Updated October 2026 · 🌍 Send from any country
✦ Quick Answer

The IRS Exempt Organizations Determinations fax number is 855-204-6184, for questions and correspondence. It does not take applications: Form 1023 and Form 1023-EZ are filed only through Pay.gov, and a faxed application is not filed. Form 4506-B is not faxed either. To send, select United States, type 8552046184 and pay $2.99 for up to 3 pages, then $0.99 per extra page.

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📋 In This Guide

  1. What the EO Determinations Fax Is For
  2. What You Cannot Fax: Form 1023 and Form 4506-B
  3. The Number and Other Contacts
  4. What to Put on the Pages
  5. Sending From Outside the US
  6. Cost, Delivery and Your Record
  7. Frequently Asked Questions

What the EO Determinations Fax Is For

EO Determinations is the IRS unit that handles applications for recognition of tax exemption. Its fax, 855-204-6184, is listed by the IRS for questions and correspondence. In practice that means letters you write to the unit about your organization's application, and replies you send when the unit writes to you.

If an IRS letter about your application gives its own fax number, for example a letter from the person reviewing your file, fax your reply to that number instead. A letter's own instructions come first, because that number goes straight to the person or team handling your case.

The rule: fax EO Determinations to ask or to answer, never to apply. Applications go through Pay.gov, and a number printed on your own IRS letter wins over the general one.

What You Cannot Fax: Form 1023 and Form 4506-B

Form 1023 and Form 1023-EZ cannot be faxed. Since January 31, 2020 they must be filed electronically through Pay.gov. A faxed application is not filed, however clean the pages are, so a fax to 855-204-6184 does not start the clock on your exemption. File on Pay.gov first, then use the fax for any questions or correspondence that follow.

Form 4506-B is not faxed either. It is sent using the "Submit Form" button built into the form itself, which sends it by email. There is no fax route for it, so do not send it to the EO Determinations line.

For the general picture of which IRS forms have a fax route and which do not, see our hub on how to fax the IRS.

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The Number and Other Contacts

ContactEO Determinations
Fax (questions and correspondence)855-204-6184
Phone877-829-5500
MailP.O. Box 2508, Room 6-403, Cincinnati, OH 45201
Form 1023 and 1023-EZPay.gov only

If you are unsure whether something belongs on the fax line, call 877-829-5500 and ask before you send. It is better to spend a few minutes on the phone than to fax a document to a unit that cannot act on it.

What to Put on the Pages

Start with a cover page addressed to EO Determinations. Put the organization's legal name exactly as it appears on the application, its EIN, the name and title of the person writing, a phone number with country code, an email address, and the date. If you are replying to an IRS letter, quote the reference details printed on that letter and attach a copy of it.

Then the letter or documents themselves. Put the organization's name and EIN at the top of every page, because faxed sheets can be separated on arrival. Sign any letter that should be signed by an officer, and scan to PDF rather than photographing the pages so small print stays readable. If you are an accountant or attorney writing for the organization, our guide to Form 2848 covers the authorization fax numbers.

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Sending From Outside the US

Board members and founders of US charities often live abroad, and the fax is one of the few ways to reach EO Determinations quickly from another country. Select United States from the list and type 8552046184: 10 digits, no leading 1, no spaces. Our guide to faxing to the USA covers the format, and our guide to sending a fax from outside the United States covers paying and uploading from abroad.

If your organization still needs an EIN before it can apply, see our guide to getting an EIN from abroad.

Cost, Delivery and Your Record

US numbers are $2.99 for up to 3 pages, then $0.99 per extra page. A typical correspondence fax, for example a cover page, a three-page letter and three pages of supporting documents, comes to 7 pages: $6.95. You see the price before you pay.

There is no account, nothing is printed on your document, and delivery usually takes a few minutes. The confirmation email shows the destination number, the page count and the time it went through, in US Eastern Time: your record of exactly when it was sent. If the fax cannot be delivered, you are refunded automatically.

If the IRS needs to fax something back to you, our sister service GetAFax.com gives you a US fax number for 24 hours for $5, and faxes arrive in your email.

Why send it here

One price for the whole fax, shown before you pay, and nothing added at checkout.

Nothing is printed on your document. It arrives exactly as you uploaded it.

If it cannot be delivered, the money goes back to your card without you asking.

It works from anywhere. Send from any country, in any browser, with no account.

Frequently Asked Questions

Cost and what you get
How much does it cost to fax IRS EO Determinations?
$2.99 for up to 3 pages, then $0.99 per extra page. A 7-page correspondence fax costs $6.95. There is no account or subscription.
Is there a cheaper way to fax the IRS exempt organizations office?
OverseasFax charges $2.99 for up to 3 pages and $0.99 for each extra page, from the US or any other country, with no account, no subscription and nothing added at checkout. Free fax services do exist, but they usually cap the number of pages and print their own advertising on the cover page, which you do not want on a letter to the IRS.
Can I fax IRS Exempt Organizations for free?
Free fax services usually limit pages and add their own advertising to the cover page. For correspondence about your organization's exemption, a clean fax with a dated record that it went through is worth $2.99.
Sending a fax
Can I fax Form 1023 to the IRS?
No. Since January 31, 2020, Form 1023 must be filed electronically through Pay.gov. A faxed Form 1023 is not filed.
Is there a fax number for Form 1023-EZ?
No. Form 1023-EZ is also filed only through Pay.gov. The EO Determinations fax is for questions and correspondence, not applications.
Can I fax Form 4506-B to the IRS?
No. Form 4506-B has no fax route. It is sent with the Submit Form button on the form itself, which sends it by email.
What can I fax to IRS EO Determinations?
Questions and correspondence about an exemption application, sent to 855-204-6184. Applications themselves go through Pay.gov.
The IRS agent reviewing our 501(c)(3) application sent a letter with a fax number, which number do I use?
Use the fax number on the letter. It goes to the person or team handling your file. The general EO Determinations fax, 855-204-6184, is for when no other number is given.
I'm treasurer of a US charity but live in Dubai, can I fax EO Determinations from here?
Yes. OverseasFax works in any browser in any country. Select United States, type 8552046184 and pay $2.99 for up to 3 pages.
Can I fax EO Determinations to ask about our pending exemption application?
Yes, questions can go to the fax at 855-204-6184. You can also call EO Determinations at 877-829-5500.
Fax numbers and format
What is the IRS exempt organizations fax number?
855-204-6184, the fax for EO Determinations questions and correspondence. If an IRS letter about your application gives a different number, use that one.
What is the mailing address for IRS EO Determinations?
P.O. Box 2508, Room 6-403, Cincinnati, OH 45201. The fax number is 855-204-6184 and the phone number is 877-829-5500.
What is the phone number for IRS Exempt Organizations?
877-829-5500. Use it to check whether something belongs on the fax line before you send it.
How do I type 855-204-6184 from outside the US?
Select United States from the list, then type 8552046184. That is 10 digits with no leading 1, no spaces and no dashes.
Receiving a reply
Will IRS EO Determinations fax me a reply?
Only if the IRS arranges it. If you need a number to receive a fax, our sister service GetAFax.com gives you a US fax number for 24 hours for $5, and faxes arrive in your email.
Delivery, proof and safety
What record do I get when I fax EO Determinations?
A confirmation email with the destination number, the page count and the time the fax went through, in US Eastern Time. It is your record of exactly when it was sent, so keep it with a copy of the pages.
How fast does a fax reach IRS EO Determinations?
Usually within a few minutes. If the line is busy and the fax cannot be delivered, you are refunded automatically and can send again.
Why did my fax to 855-204-6184 fail?
Usually a busy line or a leading 1 typed in front of the 10 digits. You are refunded automatically, so check the number and send again.
More questions
What should the cover page say when faxing EO Determinations?
The organization's legal name, its EIN, your name and title, a phone number with country code, the date, and what the fax is about. If replying to an IRS letter, quote its reference details and attach a copy.

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