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EIN for a Foreign Entity: How to Apply
A foreign entity is a company formed outside the United States. When it earns US income, opens a US bank account, or partners with a US business, the IRS requires a US EIN. A foreign entity gets one on Form SS-4 with no Social Security Number. Here is how.
Last updated: June 28, 2026
Short Answer
A foreign entity is a company formed outside the United States, and it needs a US EIN once it has US tax, withholding, banking, or filing obligations. A foreign corporation that files Form 1120-F, claims a tax treaty rate, or joins a US partnership needs one. It applies on Form SS-4 with no SSN — the responsible party writes "Foreign" on Line 7b and files by fax.
A company formed outside the United States can still owe US taxes, face US withholding, or need a US bank account. When that happens, the IRS expects the foreign entity to carry a US EIN. This article explains when a foreign corporation or partnership needs a US EIN, how a foreign entity differs from a foreign-owned US LLC, and how to complete Form SS-4 and file by fax with no Social Security Number.
Does a Foreign Entity Need a US EIN?
A foreign entity needs a US EIN when it touches the US tax system. A company formed abroad with no US activity usually does not, but several common triggers create the requirement.
| Trigger | Why an EIN is required |
|---|---|
| US-source income with withholding | Needed for Form W-8BEN-E to claim a treaty rate |
| Filing Form 1120-F | A foreign corporation reporting US income needs an EIN |
| Becoming a partner in a US partnership | The partnership needs the partner's EIN for K-1 reporting |
| Opening a US bank account | Banks require an EIN for a business account |
| US payroll or a US subsidiary | An employer or owner needs an EIN |
The common thread is a US obligation. A foreign company that only sells to US customers from abroad, with no US presence and no US-source income, generally has no EIN requirement. See EIN for non-residents for the broader non-resident picture.
Foreign Entity vs Foreign-Owned US LLC
A foreign entity and a foreign-owned US LLC are different things, and the distinction decides which US return you file. This guide covers the foreign entity — the company formed outside the United States.
| Factor | Foreign entity | Foreign-owned US LLC |
|---|---|---|
| Where formed | Outside the US (e.g., UK Ltd, German GmbH) | Inside a US state |
| Owner | Can be anyone | A non-US resident |
| Typical US return | Form 1120-F | Form 5472 + pro-forma 1120 |
| Needs a US EIN? | When US obligations arise | Yes |
A non-resident who forms a Delaware or Wyoming LLC has a foreign-owned US LLC, not a foreign entity. A non-resident whose existing overseas company needs a US tax ID has a foreign entity. Both apply on Form SS-4; see EIN for a corporation if your foreign entity is incorporated.
How Does a Foreign Entity Fill Out Form SS-4?
A foreign entity completes Form SS-4 the same way as any applicant, with one key adjustment for the missing US tax ID. No SSN or ITIN is required.
Enter the Entity Details
Name the Responsible Party
State the Reason and Sign
A small error — the wrong entity type or a missing signature — restarts the IRS process. Filing the form correctly the first time is what keeps the timeline to 4-7 business days. See the Form 5472 guide if your structure also carries that filing.
Why Does a Foreign Entity Need an EIN for Withholding?
A foreign entity needs an EIN for withholding because US payers must withhold tax on US-source income, and the EIN unlocks the reduced treaty rate. Without it, the default rate applies.
When a US business pays a foreign entity US-source income — royalties, certain interest, or service fees — the payer withholds tax. The default withholding rate is 30%. To lower that rate under a tax treaty, the foreign entity gives the payer a Form W-8BEN-E, and a complete W-8BEN-E often requires a US EIN.
- No EIN, no W-8BEN-E. The payer withholds the full 30%.
- EIN plus W-8BEN-E. The payer applies the treaty rate, which can be much lower or zero.
- The EIN is the entity's permanent ID. It never expires, so one application covers all future US payers.
For a foreign entity earning recurring US income, the EIN pays for itself by reducing withholding on every payment.
How Long Does a Foreign Entity EIN Take to Get?
A foreign entity that files Form SS-4 by fax typically receives the EIN in 4-7 business days when the form is error-free. The IRS controls this timeline, and the filing method decides the speed.
The IRS online EIN tool requires a US SSN or ITIN, so it is blocked for most foreign entities. That leaves fax and mail. A faxed SS-4 to 855-215-1627 returns an EIN in 4-7 business days. A mailed SS-4 takes 4-6 weeks. ein.so files by fax and returns the EIN by email in 4-7 business days Standard or 2-3 business days Express, so you skip the international phone calls and IRS wait. See foreign EIN application for the full non-resident filing path.
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ein.so files Form SS-4 by fax with the IRS and delivers your EIN by email. No SSN, no US address, no IRS phone calls.
| Plan | Price | Processing |
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| Standard | $49 | 4-7 business days |
| Express | $97 | 2-3 business days |
Frequently Asked Questions
Does a foreign entity need a US EIN?
A foreign entity needs a US EIN when it has US tax obligations, US-source income subject to withholding, a US bank account, or a US filing requirement. A foreign corporation that files Form 1120-F, claims a tax treaty benefit, or becomes a partner in a US partnership needs an EIN. A foreign company with no US activity usually does not.
Can a foreign company get an EIN without an SSN?
Yes. A foreign company gets an EIN without a Social Security Number by filing Form SS-4 with the IRS. The responsible party who has no SSN or ITIN writes 'Foreign' on Line 7b. The IRS online tool is blocked without an SSN, so foreign entities file by fax to 855-215-1627 instead.
What is the difference between a foreign entity and a foreign-owned US LLC?
A foreign entity is a company formed outside the United States, such as a UK Ltd or a German GmbH. A foreign-owned US LLC is a company formed inside a US state but owned by a non-resident. Both can need EINs, but they file different US tax returns. This guide covers the foreign entity formed abroad.
How does a foreign entity fill out Form SS-4?
A foreign entity enters its legal name on Line 1, its country of formation, and an individual responsible party on Line 7a. The responsible party without a US tax ID writes 'Foreign' on Line 7b. Line 9a marks the entity type, often corporation or partnership. The reason for applying goes on Line 10.
Why does a foreign entity need an EIN for withholding?
US payers withhold tax on US-source income paid to a foreign entity. To claim a reduced treaty rate, the foreign entity gives the payer a Form W-8BEN-E, which often requires a US EIN. Without the EIN and W-8BEN-E, the payer applies the default 30% withholding rate to payments.
How long does it take a foreign entity to get an EIN?
A foreign entity that files Form SS-4 by fax to 855-215-1627 typically receives the EIN in 4-7 business days when the form is error-free. Mail filing takes 4-6 weeks. ein.so prepares and faxes the SS-4 and returns the EIN by email in 4-7 business days Standard or 2-3 business days Express.
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