Key takeaways
- The IRS online tool needs both a US place of business and a responsible party with an SSN, ITIN, or EIN, so most foreign founders are locked out of it and file Form SS-4 by fax, by mail, or by phone.
- The IRS publishes its own timelines: an EIN comes back by fax generally within 4 business days, and by mail in about 4 weeks. International applicants can also call +1 267-941-1099, where an IRS representative assigns the EIN during the call.
- Line 7b is the top rejection reason; foreign founders without an SSN or ITIN must enter 'Foreign' and identify the responsible party clearly.
Before you start
- Form the US LLC first; the EIN application requires the entity to exist before filing.
- Have a US street address ready for the SS-4 mailing address; a real commercial address typically clears IRS verification cleaner than a residence abroad.
Who this is for
- Foreign founders forming a US LLC without an SSN or ITIN.
- International operators expanding from a non-US entity into a US LLC.
You formed your US LLC. You have the Articles of Organization. You sit down to open a Mercury or Stripe Atlas account, and you get stopped at the same wall every foreign founder hits: the application needs an EIN, but the IRS online tool rejects you because you do not have a Social Security Number.
Here is the part nobody tells you clearly. You can still get an EIN. The IRS has a paper path built specifically for applicants without an SSN. It just takes longer and has more rules than the online form. This guide walks through the exact steps, the realistic timeline, and the mistakes that cause the IRS to reject or ignore your application.
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Why You Need an EIN
An EIN (Employer Identification Number) is a 9-digit tax ID the IRS assigns to your business. Think of it as the business equivalent of a Social Security Number. Banks ask for it to open business accounts. The IRS uses it for every tax filing. Stripe, PayPal, and most payment processors ask for it during onboarding. Without an EIN, your US company exists on paper but cannot open accounts or accept payments in its own name. Here's what you can do after you have one:
- Open a US business bank account (Mercury, Relay, Bluevine, Chase, and all major banks)
- Sign up for Stripe, PayPal, or Wise Business
- File your annual Form 5472 together with a pro forma Form 1120 (a cover-sheet version of the corporate return) if you are a foreign-owned single-member LLC
- Hire US contractors and issue Form 1099
- Get approved on most SaaS billing, Amazon Seller, and merchant platforms
EIN is free
The IRS never charges for an EIN. Any website asking $200-500 to "get your EIN" is reselling a free government service. Formation companies may legitimately charge for handling the paperwork on your behalf, but the EIN itself costs zero dollars.
Why the Online Application Rejects You
The IRS online EIN tool at irs.gov requires the "responsible party" to enter an SSN or ITIN (Individual Taxpayer Identification Number). If you are a non-US citizen who has never lived or worked in the US, you have neither. The online form has no path around this. Entering zeros or a fake number gets your application voided and can flag your LLC for review.
This is not a bug. It is by design. The IRS built the online tool for US taxpayers. Foreign founders are expected to use the paper or fax channel instead, which has a dedicated workflow for applicants without a US tax ID.
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The Four Paths to an EIN
Depending on where you live and what tax ID you hold, one of the following four paths applies to you. Pick the right one up front toavoid wasted weeks.
| Your situation | Application method | IRS published timeline |
|---|---|---|
| US place of business and a responsible party with an SSN, ITIN, or EIN | IRS online tool (irs.gov) | Instant, same session |
| International applicant, no US legal residence or place of business | Call the IRS EIN line: +1 267-941-1099 (Mon to Fri, 6am to 11pm ET) | The representative assigns the EIN during the call |
| Foreign founder who prefers a paper trail | Fax Form SS-4 to IRS | Generally within 4 business days |
| No fax access | Mail Form SS-4 to IRS | About 4 weeks |
EIN application paths. Timelines are the ones the IRS publishes in the Instructions for Form SS-4 (retrieved July 2026).
Do not apply for an ITIN first
A common detour: applying for an ITIN so you can use the online EIN tool. The ITIN process itself takes 8 to 14 weeks and requires certified passport copies. Faxing Form SS-4 as a foreign founder is usually faster. Only pursue an ITIN if you need one for personal tax filings (Form 1040-NR).
Step by Step: Form SS-4 for Foreign Founders
Form SS-4 is a single page. Most of it is straightforward. The fields below are the ones where foreign founders most often make mistakes.
| Line | Field | What to enter |
|---|---|---|
| 1 | Legal name of entity | Exact LLC name from your Articles of Organization |
| 4a-b | Mailing address | A US street address, not a P.O. box, where the IRS can mail your EIN confirmation (CP 575 letter) |
| 7a | Responsible party name | Your legal name as it appears on your passport |
| 7b | Responsible party SSN/ITIN/EIN | Write "Foreign" if you have none. Do not leave blank. Do not enter zeros. |
| 8a | Is this application for an LLC? | Yes |
| 8b | Number of LLC members | 1 for single-member, actual count for multi-member |
| 9a | Type of entity | Check the box that matches your tax election. For a default single-member LLC, check "Other" and write "Disregarded entity - foreign-owned" |
| 10 | Reason for applying | "Started new business" is standard |
| 11 | Date business started | The date your LLC was formed (same as on your Articles of Organization) |
The Form SS-4 fields that matter most for foreign applicants.
Line 7b is the top rejection reason
Leaving line 7b blank or entering an invalid number (like 000-00-0000) is the single most common cause of rejected or delayed applications. Write the word "Foreign" in plain text. This tells the IRS to route your application through the foreign-applicant queue instead of flagging it as an error.
Sign the form on the bottom with your name and title (Member, Manager, or Owner depending on your LLC structure). The IRS prefers a handwritten signature: type the form, print it, sign by hand, then scan or fax. Typed-only signatures are sometimes rejected.
How to Submit: Fax vs Mail
The IRS keeps two paper channels open for foreign applicants, fax and mail, alongside the phone channel that international applicants can use. Fax is the faster of the two paper routes, but it requires access to an international fax number or an online fax service such as eFax, HelloFax, or MyFax. Here's where to send Form SS-4 as a foreign founder:
| Channel | Destination | Notes |
|---|---|---|
| Fax | +1 855-215-1627 (within US) or +1 304-707-9471 (outside US) | Include a return fax number. The IRS instructions say to provide one so the EIN can be faxed back; without it, the response goes out by mail instead, which is the difference between the 4-business-day fax window and the 4-week mail window. |
| Internal Revenue Service, Attn: EIN International Operation, Cincinnati, OH 45999 | Use a trackable carrier (FedEx, DHL). The IRS tells applicants to allow about 4 weeks, and to start the form 4 to 5 weeks before the EIN is actually needed. |
Where to send Form SS-4 as a foreign founder.
Fax from an online service works
You do not need a physical fax machine. Services such as eFax, HelloFax, and FaxZero all send documents to US numbers from anywhere in the world for $1-20. Save your fax confirmation sheet; if the IRS claims to have no record of your filing, this is your proof of submission.
Realistic Timeline From Submission to Usable EIN
- 1Day 0: You fax Form SS-4 to the IRS EIN International Operation, with a return fax number written on the form.
- 2Within 4 business days: the window the IRS publishes for a faxed EIN. The IRS manual attaches one condition to it, that the application is complete. An incomplete form is what turns days into weeks.
- 3The CP 575 confirmation notice follows separately by mail. Founders do report waits longer than the published window, and the IRS does not publish a separate timeline for international applicants.
- 4Once the EIN is issued you can open US bank accounts, register for Stripe, and file pending forms. A brand-new EIN may not appear in every third-party verification database on day one.
EIN in hand does not mean fully active
Some banks and payment processors run real-time IRS database checks. A newly issued EIN may not yet appear in every verification system. If a bank rejects your application saying "EIN not found," wait a couple of weeks and try again. Do not file Form SS-4 a second time; that creates duplicate EINs and compliance headaches.
Common Rejection and Delay Traps
- 1Line 7b blank or zeros instead of "Foreign." This routes your application to the domestic queue, where it is flagged as invalid and set aside.
- 2Wrong fax number. Foreign applicants use the IRS EIN International Operation fax line, +1 855-215-1627 (within US) or +1 304-707-9471 (outside US), not the domestic line. The IRS does not publish what happens to a misrouted fax, which is precisely the problem: you get no bounce, no notice, and no way to tell waiting from lost.
- 3No US mailing address on line 4a. The IRS needs somewhere in the US to send your EIN confirmation. A virtual office address solves this in a single step.
- 4Mismatched entity name. The name on Form SS-4 must exactly match your state filing. "Acme Ventures LLC" and "Acme Ventures, L.L.C." can be treated as different entities.
- 5Typed signature. The IRS requires a physical signature, even on faxed applications. Print the form, sign by hand, then scan or fax.
- 6Applying twice. If your first application seems stuck, resist the urge to re-file. An assigned EIN is permanent, so a second filing adds a number rather than replacing one. Call the IRS EIN line at +1 267-941-1099 (Monday to Friday, 6am to 11pm Eastern) instead. If the IRS tells you it has no record of your fax, work through what to do when the IRS has no record of your SS-4 before you send anything again.
What Comes After the EIN
Once your EIN is issued, several doors open at once. In the order most foreign founders tackle them:
- 1US business bank account. Mercury and Relay are the most common choices for non-residents. Both will ask for the EIN confirmation letter (CP 575), your formation documents, and a valid passport. Expect verification to take 2 to 7 business days.
- 2Payment processing. Stripe, PayPal, and Wise Business all require the EIN on their onboarding form. Stripe Atlas integrates with banking partners (Mercury, Brex, and Novo); some let you apply before your EIN is issued, with the rest of the verification completed once the EIN arrives.
- 3Annual IRS filings. Mark your calendar for Form 5472 + pro forma 1120, due every April 15, even with zero revenue. Missing this filing triggers a $25,000 penalty per form.
- 4State filings. Your state may require a separate annual report or franchise tax filing. Delaware, California, and New York are the most common states with mandatory annual filings.
Keep the EIN letter safe
The IRS is explicit that the CP 575 cannot be duplicated or recreated. What you can get instead is a Letter 147C, the EIN verification letter, and banks and processors generally accept it as equivalent proof. Scan the CP 575 the day it arrives and store it with your formation documents, because the replacement path runs through the IRS and takes time you may not have. See how to replace a lost CP 575 with a 147C.
Where a US Address Fits Into All of This
Form SS-4 needs a US mailing address. Your state filing needs a US business address. Your bank needs a US address that matches the state filing. Your registered agent needs a physical US address. If you are applying from outside the US, every one of these fields is a potential stopping point.
A virtual office address solves all of them at once. It gives you a real commercial US street address that can serve as your SS-4 mailing address, your state-filed business address, and your bank application address, all matching each other. Mail and IRS correspondence arrives there and gets scanned to you digitally.
save office provides commercial US street addresses in major cities, mail scanning, and the documentation you need for LLC formation, EIN applications, and bank onboarding, so every form you fill out has the same clean address from the first day.
Frequently Asked Questions
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