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IRS SS-4 Fax Number: Fax Your EIN Application — No SSN Required

Where do I fax Form SS-4?

Fax Form SS-4 to the IRS number for where you live and operate. 50 states or DC: 855-641-6935. No US residence, sending from inside the US: 855-215-1627. Outside the US: 304-707-9471. Last checked: October 2026.

What is the IRS EIN fax number?

The IRS EIN fax number is the Form SS-4 destination for where you live and operate. 50 states or DC: 855-641-6935. No US residence, sending from inside the US: 855-215-1627. Outside the US: 304-707-9471. Last checked: October 2026.

Answer a few simple questions. We prepare official Form SS-4, fax it directly to the IRS Fax-TIN unit, hold a dedicated 90-day return line, and email your official confirmation PDF for $19.99.

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Apply for an EIN Without a US Social Security Number

The IRS online application requires a US SSN or ITIN. If you are an international founder, or the IRS online system is erroring out, faxing Form SS-4 to the IRS Fax-TIN unit is the official method. We generate your form from your answers, send it to the correct regional center, and maintain a dedicated US return fax line for 90 days so the IRS can fax your assigned EIN letter right back to you.

Where to fax Form SS-4 (IRS fax numbers)

Numbers from the IRS Where to file Form SS-4 page and December 2025 instructions. They can change, check IRS.gov before you send on your own.

  • 50 states or DC: 855-641-6935
  • No US residence, sending from inside the US: 855-215-1627
  • Outside the US: 304-707-9471

Filling in the form yourself? Follow our step-by-step SS-4 walkthrough line by line. Stopped online with EIN reference number 101? Faxing Form SS-4 is the usual next step.

Routing is based on where you live and operate, not the state on your LLC certificate. A Delaware LLC run from abroad uses the international number.

Foreign applicants: EIN without an SSN or ITIN

The IRS online application only works if the responsible party has an SSN, ITIN or EIN and the business has a US residence or principal place of business. Everyone else applies by fax, by mail or, for international applicants only, by phone at 267-941-1099 (not toll-free, 6 a.m. to 11 p.m. Eastern, Monday to Friday).

  • Line 7b: write Foreign if the responsible party doesn't have and can't get an SSN or ITIN. An entry is required.
  • Line 9a: a single-member LLC wholly owned by a foreign person that needs the EIN for Form 5472 checks Other and writes "Foreign-owned U.S. disregarded entity-Form 5472".
  • Return fax: write a fax number the IRS can send the EIN back to, and keep it active until the reply arrives.

More detail in how to get an EIN without an SSN or ITIN.

How long does an EIN take by fax?

Form SS-4 instructions (revised 12/2025) say that under the Fax-TIN program you generally receive your EIN by fax within 4 business days. The IRS processing-status page has listed faxed SS-4s at 10 business days after receipt. A mailed application takes about 4 weeks. Plan around the live processing-status page.

Two ways to fax Form SS-4

  • Guided, $19.99: answer the questions below. We prepare Form SS-4, fax it to the right IRS unit and keep a 90-day return fax line, then email you the IRS reply.
  • On your own, $4.99 + $0.99: get a temporary fax number for 30 days for the IRS reply, write it on your SS-4, then send the fax ($0.99 covers up to 10 pages, pay only if delivered).
Get a 30-day fax number — $4.99

Where are you applying from?

The IRS uses different fax numbers based on where you live and run the business, not where the company was registered.

Live and work outside the US? Pick the last option
For example, if you live in Spain and run a Wyoming LLC from Spain, choose “outside the United States.”

FAQ

Fax Form SS-4 to the IRS number for where you live and operate. 50 states or DC: 855-641-6935. No US residence, sending from inside the US: 855-215-1627. Outside the US: 304-707-9471. Last checked: October 2026.
The IRS EIN fax number is the Form SS-4 destination for where you live and operate. 50 states or DC: 855-641-6935. No US residence, sending from inside the US: 855-215-1627. Outside the US: 304-707-9471. Last checked: October 2026.

We route your EIN application to the IRS Fax-TIN number that matches your answers: the domestic EIN unit for a business located in the 50 states or DC, or the international unit otherwise. For filling in the form line by line, see our Form SS-4 walkthrough.

According to the Form SS-4 instructions (revised 12/2025): 855-641-6935 if you have a legal residence, principal place of business or principal office in one of the 50 states or DC. Otherwise 855-215-1627 when faxing from inside the US, or 304-707-9471 from outside the US. The numbers can change without notice, so check IRS.gov before sending yourself.
Write “Foreign” (or N/A) on line 7b if the responsible party doesn’t have and isn’t eligible to obtain an SSN or ITIN. An entry is required. You then apply by fax, mail or, for international applicants, by phone, because the online application needs an SSN, ITIN or EIN.
Yes. A SingleFax 30-day temporary fax number costs $4.99 and includes the first received fax. Write it as the return fax number on your SS-4. Sending the form costs $0.99 for up to 10 pages, pay only if delivered.
An EIN (Employer Identification Number) is a unique nine-digit number assigned by the IRS to identify businesses operating in the United States. It functions like a Social Security Number (SSN) but for companies. You need an EIN to open a US bank account, register a US Stripe, PayPal, or Shopify merchant account, hire US workers, or file business taxes.
Yes, absolutely! If you are a non-US resident (a "foreign founder") and do not have an SSN or ITIN (Individual Taxpayer Identification Number), you cannot use the IRS’s online tool, but you can apply by fax using Form SS-4. We specialize in formatting this application correctly for non-US residents so the IRS can successfully issue your EIN.
Pick “I live and run the business from outside the United States.” The IRS Fax-TIN office is based on whether you have a US home or a US principal place of business, not on where the LLC is registered. A Wyoming or Delaware LLC you operate from another country still goes to the international fax number.
Form SS-4 is the IRS application for an EIN. We fill it from your answers and fax it to the IRS. If you give another person permission to receive the EIN, the applicant must sign the completed form on paper and upload a scan. Otherwise, you can use our signature pad.
Yes. Select this option in the last step and enter their details. The IRS calls them a Third Party Designee. Download the completed SS-4, have the applicant sign and date it with a pen, and upload a PDF scan. A signature drawn on a screen is not accepted for this permission. Their permission ends when the IRS issues the EIN, and does not cover your other tax matters.
Yes, the IRS has a free online portal, but it is strictly restricted. To use the online tool, the applicant must possess a valid US SSN or ITIN. If you do not have one, or if you encounter errors (which are extremely common on the IRS portal), faxing Form SS-4 is the primary legal method to obtain your EIN.
The IRS processing-status page lists faxed Form SS-4 as processed 10 business days after receipt (reviewed 2 Oct 2026). Paper applications are processed within 30 days of receipt. Form SS-4 instructions still say that under the Fax-TIN program you can receive your EIN by fax generally within 4 business days. For planning, use the live processing-status page. We keep your dedicated US fax number active for 90 days so we capture the return fax when the IRS replies, and instantly email it to you.
Yes. Our service includes a dedicated temporary US fax number for 90 days. The IRS will send the faxed confirmation back to this specific number. Our system intercepts that fax, converts it to a PDF, and delivers it straight to your email inbox. You do not need to purchase a separate fax line or subscription.
No, not for this job. EIN by Fax is $19.99 for SS-4 fill, Fax-TIN, and a 90-day IRS return channel. A lifetime number ($97) is a published firm address for unknown inbound later. Use lifetime after the EIN if banks and vendors will keep asking; do not buy lifetime as the per-client EIN SKU.
For $19.99, we guide you through the answers, prepare Form SS-4, fax the completed application to the IRS, and provide a US return fax number for 90 days. We email IRS replies received on that number. If you authorize someone else to receive the EIN, you sign the completed form on paper and upload a scan before paying.
No. SingleFax is an automated software tool that helps you prepare your own IRS Form SS-4 based on your inputs, and provides the digital fax infrastructure to transmit and receive it. We do not provide tax, legal, or corporate structure advice. If you have complex questions, please consult a certified tax professional or attorney.
If you are a non-US owner of a US single-member LLC, you typically must file Form 5472 every year (even with little or no revenue). We offer Form 5472 by fax for $29.99, and Form 7004 extensions for $4.99 if you need more time before the deadline. Domestic corporations electing S-corp status can file Form 2553 with us for $49 (timely) or $79 (late).

What customers say

Google review

"SingleFax made the whole process surprisingly easy. I needed to fax an EIN application to the IRS and also have a temporary fax number so the IRS could send the EIN back. I was able to get a 30-day receiving number, send the application online from my computer, and avoid signing up for a monthly fax service I didn’t need."

James C. Baker
Church Bunnies · @churchbunnies
Google review

"Fantastic service easy to use I needed to fax some medical documents. Everything went smoothly, easy to use and I did all from my computer."

Jose
Google review

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Preparing this filing? Read the step-by-step SS-4 walkthrough before you submit.