Learning Business · USA / FOREIGN FOUNDERS

How international founders apply for a U.S. EIN: Form SS-4 step by step

A non-U.S. founder may need an Employer Identification Number for a U.S. entity, federal tax reporting, payroll, or banking. The application route depends on the business’s principal location and the applicant’s facts—not citizenship alone. Apply directly with the IRS; an EIN is free.

1. Confirm the entity and the reason for an EIN

If you are forming an LLC, corporation, or partnership, complete the state formation first. An EIN is a federal tax identifier; it does not create the entity, grant a business license, decide tax treatment, or authorize anyone to work in the United States.

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Check whether this entity actually needs an EIN for its tax, payroll, banking, or reporting purpose.
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Use the legal name shown on the state formation record.
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Do not apply again if this same entity already has an EIN; use only one application method.

2. Choose the application route from the business facts

The IRS route turns on whether the applicant has a legal residence, principal place of business, or principal office or agency in the United States or its territories. A foreign owner is not automatically an international applicant for this test. If none of those U.S. locations applies, the online application is unavailable and the international routes below apply.

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U.S. or territory location: check current online eligibility; the relevant principal officer, owner, or other applicant must have an accepted taxpayer ID for the online tool.
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No U.S. or territory location: an authorized international applicant may apply by phone, fax, or mail using the current Form SS-4 instructions.
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If the location or applicant facts are mixed, confirm the route with the IRS before submitting.

3. Prepare Form SS-4 before contacting the IRS

Use the current IRS form and instructions. Identify the individual who ultimately owns or controls the entity as its responsible party. The form asks for the legal name, mailing and physical addresses, entity type, LLC details, reason for applying, start date, accounting year-end, expected employees, business activity, and prior EIN history.

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Review lines 1–6, 7a–7b, 8a–8c, 9a, and 10–18 as applicable; the instructions explain which lines each applicant completes.
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If the responsible party has no SSN or ITIN and is ineligible to obtain one, the IRS instructions say to enter “foreign” or “N/A” on line 7b. Do not use this exception if the person is eligible for an SSN or ITIN.
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Do not guess at the entity’s federal tax classification, especially for a foreign-owned single-member LLC; get qualified tax advice when the answer affects filings.

4. Submit once through an official IRS channel

For international applicants with no qualifying U.S. location, the IRS lists a non-toll-free telephone option, fax, and mail. Processing estimates are not guarantees and may change; check the IRS page again on the day you apply.

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Phone: 267-941-1099, Monday–Friday, 6 a.m.–11 p.m. Eastern time. Complete SS-4 first; the caller must be authorized and able to answer the form questions.
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Fax SS-4: 855-215-1627 when faxing from within the U.S.; 304-707-9471 when faxing from outside the U.S. The IRS says fax applications generally take about four business days; include a return fax number.
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Mail: IRS, Attn: EIN International Operation, Cincinnati, OH 45999. The IRS advises allowing about four weeks. Use the exact address on current IRS instructions.
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Use one method per entity. The IRS limits EIN issuance to one per responsible party per day. Keep the completed SS-4, submission proof, and EIN assignment notice in secure business records.

5. Treat the EIN as one step in the launch process

After the IRS assigns the number, separately verify federal returns, state tax accounts, local permits, bank requirements, and employer registrations that match the actual activity. Company ownership and permission to perform work in the U.S. are also separate questions.

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Download and secure the IRS assignment notice; do not post an EIN or tax document in the community.
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Calendar any follow-up applications and filing dates with the relevant authority.
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Ask a cross-border tax professional about foreign-owned entity reporting and ask qualified immigration counsel about work authorization when relevant.

PRIMARY SOURCES

Verify with the responsible authority.

Rules, forms, fees, and eligibility can change. Confirm the current federal, state, and local requirements before acting.

Learning Business provides educational information, not legal, tax, immigration, or financial advice. State and local requirements can change the result.