EIN for foreign entity: How to apply and what you need to know in 2026

An EIN for foreign entity use is a 9-digit identifier the IRS assigns to businesses and other organizations. It is also called a federal tax identification number, but it is not the same as an individual taxpayer identification number or a foreign-country TIN.

For the 2025 tax year filed in 2026, the key question is not whether the owners live outside the United States. The entity needs an EIN when a required return, withholding filing, employment filing, election, or other federal document asks for one, and it may request one for banking or state registration.

What is an EIN for a foreign entity?

An EIN for a foreign entity is a 9-digit federal tax identification number the IRS assigns under Internal Revenue Code Section 6109. For 2026 applications, foreign applicants use Form SS-4 and choose phone, fax, or mail when their principal office is outside the United States or its territories.

A foreign entity applies on IRS Form SS-4. International applicants may call 267-941-1099, fax the form for processing generally within 4 business days, or mail it for processing in approximately 4 weeks. The IRS does not charge an EIN application fee.

An EIN identifies the entity on federal returns, information returns, withholding forms, tax deposits, and IRS correspondence. It can also support US business registration and bank onboarding, but receiving an EIN does not create a company, determine its federal classification, or confirm that it owes US tax.

A foreign founder forming a domestic LLC should first review how a nonresident can form an LLC in the US. The IRS’s international tax guidance for nonresident aliens and foreign taxpayers explains that filing duties depend on US income, business activity, withholding, and taxpayer status.

An EIN is sometimes described as an international tax ID number, but that phrase can be misleading. The EIN is a US identifier only, and the entity may still need a separate TIN from its country of formation or tax residence.

EIN vs. ITIN vs. SSN: Which does a foreign entity need?

A foreign entity normally needs an EIN, while an ITIN and SSN identify individuals. The correct ITIN vs EIN choice depends on who is filing: corporations, partnerships, and LLCs use Form SS-4 for an EIN; eligible individuals use Form SS-5 or Form W-7 for an SSN or ITIN.

A recurring TFX client issue is an owner applying for an ITIN when the entity needs an EIN. An ITIN may still be needed by a non-resident alien owner who has an individual US filing obligation and is not eligible for an SSN, but it never replaces the entity’s EIN.

A corporation, partnership, or LLC uses 1 EIN, while an ITIN or SSN belongs to an individual.

 

Read TFX’s guide to ITINs for individuals who have US tax obligations but cannot obtain an SSN before deciding which identifier an owner needs. The IRS also publishes ITIN reminders for tax professionals, including the rule that ITINs are for federal tax purposes and do not provide work authorization.

For a broader individual-ID comparison, see TFX’s analysis of the ITIN and SSN disparity affecting nonresident workers. That issue is separate from the ITIN vs EIN decision for the entity itself.

Which foreign entities must obtain an EIN?

A foreign entity must obtain an EIN when a US return, withholding form, employment filing, excise filing, or other required document calls for one. For 2025 returns filed in 2026, the trigger depends on the entity’s US activity and classification, not foreign ownership alone or the presence of 1 US owner.

The following 6 situations commonly require an EIN or create a practical reason to obtain EIN for foreign entity use:

1. A foreign corporation filing Form 1120-F. The corporation generally needs an EIN when it is engaged in a US trade or business, has effectively connected income, or otherwise must file the return.
2. A foreign partnership filing Form 1065 or Section 1446 forms. An EIN is needed when the partnership has a federal filing or withholding obligation, subject to narrow Form 1065 exceptions.
3. A withholding agent filing Forms 1042 and 1042-S. An entity that withholds on payments to foreign persons needs the identifier required on its returns and deposits.
4. A foreign-owned US single-member LLC filing Form 5472. This is a domestic disregarded entity for most income-tax purposes, but it is treated as a corporation for limited Section 6038A reporting.
5. An entity with employees, excise taxes, or certain federal elections. The specific return or election determines whether the EIN is mandatory.
6. An entity requesting an EIN for banking or state administration. Form SS-4 permits a banking-purpose application even when no current federal return is due.

A controlled foreign corporation does not need an EIN solely because a US shareholder files Form 5471. Current Form 5471 instructions permit a reference ID number when the foreign corporation has no EIN, although an EIN may be required for another federal action, such as making an entity-classification election on Form 8832.

See TFX’s additional filing requirements for taxpayers with non-US corporations and its controlled foreign corporation guide for owner-level reporting. The IRS’s taxation rules for nonresident aliens apply to individuals, so a non-resident alien owner should not use those rules as a substitute for the entity’s classification analysis.

A foreign seller subject to FIRPTA may need a US TIN for a return, refund claim, or withholding certificate. The answer depends on whether the seller is an individual or entity and which form is filed, so foreign ownership by itself does not make an EIN mandatory.

How to apply for an EIN for a foreign entity: Step-by-step

To apply for EIN for foreign entity purposes, complete 5 steps: identify the responsible party, prepare Form SS-4, select phone, fax, or mail, receive the EIN notice, and use the number on required filings. International applicants cannot use the online tool when their principal office is outside US territories.

These steps cover applying for an EIN for a foreign entity under the December 2025 Form SS-4 instructions used in 2026:

1. Identify the responsible party. Except for a government entity, this must be a natural person who ultimately owns, controls, or exercises effective control over the entity and its funds.
2. Complete Form SS-4. Use the legal name from the formation document, the full foreign address, the correct federal entity type, the reason for applying, and a specific description of the principal activity.
3. Choose the permitted application method. International applicants may call 267-941-1099 from 6 a.m. to 11 p.m. Eastern time, Monday through Friday. They may also fax or mail the signed form.
4. Receive and retain EIN confirmation. The IRS issues the number and sends an EIN notice. Eligible Business Tax Account users may download a digital CP 575, and authorized callers can request Letter 147C when verification is needed.
5. Use the EIN on the correct filings. The number does not replace Form 1120-F, Form 1065, Form 5472, withholding returns, state registrations, or any owner-level return.

An individual owner with US-source income may separately need to understand Form 1040-NR filing for nonresident taxpayers. That individual filing is distinct from applying for an EIN for a foreign entity.

 

 

The IRS limits applications to 1 EIN per responsible party per day across all methods. Do not submit duplicate applications because the first response has not arrived.

Completing IRS Form SS-4 for a foreign entity

IRS Form SS-4 is 1 page, but 5 fields cause most avoidable delays: the legal name, responsible-party details, entity type, reason for applying, and business start date. For a responsible party who lacks and cannot obtain an SSN or ITIN, Line 7b must say “foreign” or “N/A,” not “NONE.”

The following 5 fields need a document-level check before filing:

• Line 1 – legal name: Match the charter, articles, partnership agreement, trust document, or other governing record.
• Lines 7a and 7b – responsible party: Enter the individual’s full name and SSN or ITIN. Enter “foreign” or “N/A” only when the person has no SSN or ITIN and is ineligible to obtain one.
• Line 9a – type of entity: Report the federal classification requested by the form instructions. This line does not itself make an entity-classification election.
• Line 10 – reason for applying: Select 1 reason. A foreign-owned US disregarded entity filing Form 5472 should use “Other” and state that purpose.
• Line 11 – business start date: A foreign applicant generally enters the date it began or acquired a business in the United States, not the date the entity was formed abroad. Follow the specific instructions for ownership changes, trusts, and estates when those rules apply.

The application also needs a complete foreign mailing address, principal business location, closing month, and detailed principal activity. Leaving required fields blank can lead to IRS follow-up, so complete every required line exactly as the instructions state.

Using a third-party designee to obtain an EIN for a foreign entity

A third-party designee may answer Form SS-4 questions and receive the newly assigned EIN after the applicant signs the authorization. The authority ends when the IRS assigns and releases the number, so it does not create continuing representation rights under Form 2848 or access to later IRS account matters.

A CPA, attorney, or other authorized individual can act as third-party designee. The designee’s name, address, telephone number, and fax number belong in the designated section, and the applicant must sign Form SS-4 for the authorization to be valid.

The designee can use the same phone, fax, or mail route available to the applicant. A caller must be able to answer the IRS employee’s Form SS-4 questions, and an incomplete application can prevent the EIN from being assigned during that call.

When applying for an EIN for a foreign entity through a designee, keep the authorization narrow. A separate Form 2848 or Form 8821 may be needed for later representation or information access, depending on the matter.

EIN for foreign-owned LLC: Special considerations

A foreign-owned LLC may need an EIN and Form 5472 even when it owes no US income tax, but the filing duty turns on reportable related-party transactions. For a calendar-year 2025 foreign-owned US disregarded entity, Form 5472 with a pro forma Form 1120 was due April 15, 2026.

The following 4 rules separate a foreign-owned LLC from a foreign disregarded entity organized outside the United States:

1. A foreign-owned US single-member LLC is domestic. It is disregarded for most federal income-tax purposes unless it elects corporate treatment, but Section 6038A treats it as a corporation for Form 5472 reporting.
2. Form 5472 depends on reportable transactions. Formation funding, capital contributions, distributions, dissolution, and other transactions with a foreign related party can trigger the form even when revenue is $0.
3. A domestic LLC with 2 or more members is generally a partnership. It usually files Form 1065 unless it elects corporate classification or another exception applies.
4. State registration does not issue an EIN. The entity forms with the state first, then submits Form SS-4 to the IRS when an EIN is required or requested.

Based on our client scenario at TFX: A foreign owner contributes $10,000 to a newly formed single-member US LLC and the LLC has no sales in 2025. The contribution is still a reportable transaction for Form 5472, so “zero income” does not end the filing analysis.

 

 

A US person’s ownership of a foreign disregarded entity is a different rule set. Review TFX’s Form 8858 guide for foreign disregarded entities and foreign branches, then use the Form 5472 reporting guide for foreign-owned US entities for the domestic LLC filing.

A foreign-owned US disregarded entity cannot e-file Form 5472. It files the form with a pro forma Form 1120 by fax to the dedicated IRS number or by mail to the special Ogden address, and Form 7004 extends a calendar-year 2025 filing to October 15, 2026 when filed on time.

EIN for foreign corporation with US tax obligations

A foreign corporation EIN is required when the corporation must file Form 1120-F or another US return that asks for an EIN. A calendar-year 2025 Form 1120-F was due April 15, 2026, for corporations with a US office, or June 15, 2026, without one, subject to extension rules.

A foreign corporation generally files Form 1120-F when it conducts a US trade or business, has effectively connected income, or has US-source income whose tax was not fully satisfied through withholding. A corporation with no US trade or business and only income fully withheld at source may qualify for a filing exception.

The foreign corporation EIN must appear on Form 1120-F and related IRS records. The corporation’s withholding tax requirements under Sections 1441 and 1442 generally apply a 30% gross rate to US-source fixed or determinable annual or periodical income, such as dividends, interest, rents, or royalties, unless a Code exemption or treaty rate applies.

The IRS explains the withholding and reporting rules for other US-source income paid to foreign persons. The income’s source, character, and connection to a US trade or business must be determined before applying a rate.

Based on our client scenario at TFX: A foreign company receives $50,000 of US-source royalty income. Without valid treaty documentation, a 30% gross withholding rate can mean $15,000 withheld ($50,000 × 30%); treaty eligibility and the correct Form W-8 must be confirmed before payment.

A tax treaty may limit US tax on business profits when the corporation lacks a US permanent establishment, but the exact result depends on the treaty article, activities, agents, and disclosure rules. See TFX’s Form 1120-F guide for foreign corporations before relying on a protective return or treaty position.

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EIN for foreign partnership with US partners

A foreign partnership does not need an EIN merely because it has 1 US partner. It generally needs one when it must file Form 1065, Form 8804, or another US return; Form 8865 is filed by specified US persons, and Section 1446 withholding applies to ECTI allocable to foreign partners.

The following 4 rules correct common US partnership taxation errors:

• Form 1065: A foreign partnership generally files when it has effectively connected income or US-source gross income. A narrow exception can apply when there is no ECI, US-source income is $20,000 or less, less than 1% of each partnership item is allocable to direct US partners, and the partnership is not a withholding foreign partnership.
• Form 8865: Specified US persons file this return for controlled foreign partnerships, certain transfers, and certain changes in ownership. The foreign partnership does not file Form 8865 merely because a US partner exists.
• Section 1446 withholding: A partnership with effectively connected taxable income allocable to foreign partners generally withholds at 21% for corporate foreign partners and 37% for noncorporate foreign partners, subject to permitted adjustments.
• Forms 8804, 8805, and 8813: Form 8804 reports the annual liability, Form 8805 allocates withholding to foreign partners, and Form 8813 accompanies installment payments or identifies EFTPS payments.

Based on our client scenario at TFX: A partnership has $100,000 of ECTI allocable to 1 noncorporate foreign partner. At the general 37% rate, Section 1446 withholding is $37,000 before permitted reductions ($100,000 × 37%); the rule applies to the foreign partner, not a US partner.

A calendar-year 2025 Form 1065 was due March 16, 2026, because March 15 fell on a Sunday. A timely Form 7004 extends the filing deadline to September 15, 2026, but it does not extend payment deadlines for Section 1446 withholding.

Understand the owner-level filing through TFX’s Form 8865 guide for US persons with foreign partnerships. Partnerships remitting Section 1446 installments should also review the Form 8813 withholding payment voucher guide.

Post-EIN US tax compliance obligations for foreign entities

After an EIN is issued, the entity must match each 2025 filing to its classification and US activity. The 6 main areas are income-tax returns, information returns, withholding, estimated payments, address or responsible-party updates, and final-return procedures; FBAR and Form 8938 are not automatic EIN-related filings.

The following 6 post-EIN obligations need a separate yes-or-no review:

1. Income-tax returns: Form 1120-F may apply to a foreign corporation, while Form 1065 may apply to a foreign or domestic partnership. Form 1040-NR is an individual return, not an entity return.
2. International information returns: Form 5472, Form 5471, Form 8865, or Form 8858 may apply based on the filer, ownership, classification, and transactions.
3. Withholding filings: Forms 1042, 1042-S, 8804, 8805, 8813, 8288, or 8288-A may apply to specific payments or dispositions.
4. Estimated or installment payments: Corporations generally consider estimated tax when expected tax is $500 or more; individuals use a $1,000 threshold, while partnership withholding follows Section 1446 installment rules.
5. Entity-detail updates: Form 8822-B reports an address or responsible-party change, and responsible-party changes are due within 60 days.
6. Closure procedures: An EIN cannot be canceled, but the IRS account can be closed after required returns are filed and the entity submits a closure request with the required details.

For calendar-year 2025 returns, the filing date changes with the entity and form.

 

The 2026 deadlines above come from the IRS tax calendar and the filing instructions for the relevant returns. An extension to file does not necessarily extend a tax or withholding payment deadline.

A foreign entity does not file FBAR merely because it has an EIN or a US bank account. FBAR applies to a US person with foreign financial accounts exceeding $10,000 in aggregate at any time, while Form 8938 applies to specified individuals and specified domestic entities with specified foreign financial assets.

US owners and domestic entities can review TFX’s detailed FBAR filing guide. The IRS’s FATCA guidance for foreign financial institutions and other entities covers a separate Chapter 4 regime and should not be treated as an automatic Form 8938 filing rule for every foreign entity.

A business that has stopped operating still needs to address final returns and information filings. See TFX’s guide to US reporting for a dormant foreign corporation before asking the IRS to close the EIN account.

Foreign companies registered to do business with a US state may also have FinCEN beneficial ownership reporting. Under the rule in effect in 2026, US-created entities are exempt, while a qualifying foreign reporting company registered on or after March 26, 2025, generally files within 30 calendar days unless an exemption applies. Review FinCEN’s current beneficial ownership information requirements before filing.

Tax treaty benefits and the EIN requirement

Tax treaty benefits do not always require a US EIN. A foreign corporation or other foreign beneficial-owner entity that is not a flow-through entity generally claims treaty relief on Form W-8BEN-E and provides a US or foreign TIN, subject to limited exceptions. A foreign partnership, intermediary, simple trust, grantor trust, or other flow-through entity generally uses Form W-8IMY with the required owner or beneficiary documentation. A foreign person receiving effectively connected income generally uses Form W-8ECI.

A foreign corporation or other non-flow-through entity gives Form W-8BEN-E to the withholding agent rather than the IRS. The entity can often use its foreign TIN for a treaty claim, although a US EIN is required when another rule requires a US TIN, such as filing a US return or reporting effectively connected income.

If documentation is missing or invalid, the withholding agent may have to apply the statutory 30% rate to applicable US source income. A treaty rate is not automatic; the entity must establish residence, beneficial ownership, derivation of income, and any limitation-on-benefits condition.

Business-profits articles commonly turn on whether the foreign enterprise has a permanent establishment in the United States. The treaty, technical explanation, activities, dependent-agent rules, and any Form 8833 disclosure must be checked before concluding that the income is exempt.

The IRS explains how income is sourced for nonresident aliens and foreign taxpayers. For owner-level social-tax coordination, see TFX’s guide on avoiding double self-employment tax for Americans abroad, which addresses totalization agreements rather than corporate income-tax treaties.

Common mistakes when applying for an EIN as a foreign entity

The 5 costliest EIN application mistakes are choosing an individual TIN for the entity, naming another entity as the responsible party, entering “NONE” on Line 7b, assuming every foreign applicant can apply online, and missing the 60-day Form 8822-B deadline after a responsible-party change.

The following 5 corrections reduce avoidable IRS follow-up:

1. Use an EIN for the entity, not an ITIN. An owner may need a separate ITIN, but the corporation, partnership, or LLC uses an EIN.
2. Name a natural person as the responsible party. A foreign holding company cannot fill that role unless the applicant is a government entity covered by the exception.
3. Enter “foreign” or “N/A” on Line 7b when permitted. The December 2025 instructions require an entry and do not instruct foreign applicants to write “NONE.”
4. Test online eligibility by principal location. An entity with no legal residence, principal place of business, or principal office or agency in the United States or its territories cannot use the online application.
5. Report later changes on Form 8822-B. A new EIN is not required merely because the address or responsible party changes.

 

 

Avoid submitting a second Form SS-4 while the first is pending. If a tax return is due before the EIN arrives, paper-filing instructions may permit “Applied For” plus the application date, but an EIN is required for electronic filing in situations such as Form 1120-F.

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How long does it take to get an EIN for a foreign entity?

Foreign entities that apply for an EIN for a foreign entity by phone can receive the number during an authorized international call if the IRS validates the application. Fax processing is generally 4 business days, while mail takes approximately 4 weeks. Phone assignment is not guaranteed when Form SS-4 is incomplete.

The international line operates Monday through Friday, from 6 a.m. to 11 p.m. Eastern time. The caller must be authorized to receive the EIN and answer the IRS employee’s questions about the completed application.

Phone may produce an EIN during 1 call; fax usually takes 4 business days, and mail takes about 4 weeks.

 

The IRS does not accept an EIN application through ordinary email. The EIN may be communicated through the approved method and later confirmed through an IRS notice, eligible Business Tax Account download, entity transcript, or Letter 147C.

EIN for foreign entity opening a US bank account

A bank may require an EIN before opening a US business account, but that requirement comes from the institution’s onboarding policy rather than 1 universal federal banking rule. In 2026, acceptable EIN proof may include the original CP 575, a digital CP 575 for eligible users, or Letter 147C.

A bank may also request formation documents, proof of registration, ownership information, a US address, identification for signers, and a business-purpose description. Requirements differ by institution, account type, entity jurisdiction, and whether onboarding is remote.

Form SS-4 includes “banking purpose” as a reason to apply. The EIN supports the bank’s tax reporting and entity verification, but it does not guarantee account approval or replace the bank’s customer-identification and sanctions checks.

Read TFX’s comparison of the best international banks for expats and cross-border customers before choosing an institution. A US account is not a foreign bank account for FBAR purposes, even when the account owner is foreign.

When CP 575 is unavailable, an authorized person can request Letter 147C through the IRS Business and Specialty Tax line. Eligible Business Tax Account users may also download a digital CP 575 that the IRS recognizes as an alternative to older EIN-verification documents.

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