Short answer: An EIN identifies the business. An ITIN identifies an individual who has a US federal tax purpose but isn't eligible for a Social Security number. Every foreign-owned US LLC needs an EIN, but many single-member LLC owners never need an ITIN. You need one mainly when you personally must file a US tax return or claim treaty benefits.
This is general information, not legal or tax advice. Whether you need an ITIN depends on your income, your LLC's tax classification, your country of residence and any tax treaty. IRS procedures also change. Confirm your position with a qualified US tax professional before you file anything. Facts below were checked against IRS sources as of October 2026.
EIN vs ITIN at a glance
| EIN (Employer Identification Number) | ITIN (Individual Taxpayer Identification Number) | |
|---|---|---|
| Who it identifies | The business entity, such as your LLC | You, as an individual |
| Issued for | Federal tax administration of businesses and other entities | Individuals who need a US taxpayer ID for federal tax purposes but aren't eligible for an SSN |
| Form | Form SS-4 | Form W-7 |
| Typical trigger | Forming a US LLC, banking, marketplace tax forms, annual IRS filings such as Form 5472 | Filing a personal US tax return (e.g. Form 1040-NR), or claiming a tax-treaty benefit |
| Needed to form the LLC? | No, but usually obtained straight after formation | No |
One more EIN point: the IRS states that you never have to pay a fee for an EIN. Anyone who charges you is charging for their time.
When a non-US LLC owner needs only an EIN
If you own a single-member LLC, the IRS treats it by default as a disregarded entity. That means it isn't taxed separately from you unless it elects to be treated as a corporation. Even so, a foreign-owned single-member LLC still needs an EIN. The Form SS-4 instructions include a specific entry for a "Foreign-owned U.S. disregarded entity-Form 5472", because that LLC must file Form 5472 with a pro forma Form 1120 each year.
You can get that EIN without an SSN or ITIN. The IRS's online application needs one of those numbers, but international applicants can apply by phone, fax or mail using Form SS-4. On line 7b, a responsible party who doesn't have and isn't eligible for an SSN or ITIN enters "foreign" or N/A.
Tax practitioners who work with foreign founders reach the same practical conclusion. Caldwell Tax Services, for example, puts it this way: every foreign-owned US LLC needs an EIN, but the owner personally needs an ITIN only when they must file their own US tax return. Many owners whose LLC does not create a personal US filing obligation never need one.
When you do need an ITIN
The IRS describes an ITIN as a 9-digit number for people who need a US taxpayer identification number for federal tax purposes but aren't eligible for an SSN. It is not a general ID. The IRS also says it does not give you immigration status, work authorization or identification outside the federal tax system.
Personal US tax return (e.g. Form 1040-NR)
The IRS says a nonresident alien who is engaged, or considered to be engaged, in a trade or business in the US during the year must file Form 1040-NR. So must a nonresident with US income whose tax was not fully covered by withholding. If your LLC's activity puts you in that position, you need a taxpayer ID on the return, and that usually means an ITIN. Whether your LLC's activity counts as a US trade or business is a question for your tax adviser.
Claiming tax-treaty benefits
Form W-7 has a separate reason box for a "nonresident alien required to get an ITIN to claim tax treaty benefit". If your adviser recommends claiming a treaty benefit, an ITIN may be part of that process.
When a bank, payout or verification workflow asks for a personal US tax ID
Some banks, payment providers and verification workflows ask the owner for a personal US tax ID. Policies differ by provider and change often. An ITIN may help in those cases, but no one can promise that a particular provider will accept your application. Check the provider's current requirements first. Our banking readiness service prepares your documents for exactly these reviews.
How the ITIN application works
The IRS process, as described on irs.gov and in the Form W-7 instructions:
- Complete Form W-7 and choose the reason you need the ITIN.
- Attach your federal tax return. A new ITIN application is normally attached to the front of the tax return it is needed for, and filed by that return's due date. Some exceptions apply, such as certain treaty claims. If you use an exception, you send the documents that support it instead.
- Prove identity and foreign status. A valid passport is a stand-alone document. Without one, you need at least two documents from the IRS list. You must send originals or certified copies from the issuing agency.
- Choose a route. You can mail the package to the IRS ITIN Operation in Austin, Texas. You can apply in person at certain IRS Taxpayer Assistance Centers by appointment. You can also use an IRS Acceptance Agent, or a Certifying Acceptance Agent (CAA). A CAA can verify your original passport and return it to you immediately, so you don't have to mail it to the IRS. The IRS approves acceptance agents both in the US and abroad.
- Wait for the IRS. The IRS says to allow 7 weeks, or 9 to 11 weeks during tax season or if you apply from overseas.
Each package must include the return or exception documents and acceptable identity documents. Tax practitioners also note that applications without a genuine US filing purpose are typically rejected. Settle the "do I need it?" question first.
Keep your records consistent
This part is ECOMHUTSY's practice, not an IRS rule. When we prepare an ITIN application for an LLC owner, we check that these records tell the same story:
- the name on your passport;
- the LLC ownership recorded in your formation and operating documents;
- the EIN confirmation letter (CP 575) the IRS issued to the LLC;
- the Articles of Organization filed with the state.
A spelling difference, a missing middle name or an outdated address can cause delays with banks and marketplaces. It can also cause awkward questions when your adviser prepares the return. Fixing it before you file is far easier than explaining it afterwards.
Documents ECOMHUTSY asks for, and why
For our ITIN application support, we ask for:
- the passport biodata page, with all four corners visible;
- your full residential address and legal name;
- your LLC name and EIN;
- the EIN letter and Articles of Organization.
The LLC and EIN items aren't IRS requirements for an ITIN. We use them to confirm your filing purpose and to keep your records consistent. Identity documents are requested only through a secure follow-up. Never send passport scans through a public website form, open chat or email thread you don't control. IRS requirements and processing timelines vary, and our support is not tax or immigration advice.
ECOMHUTSY has supported cross-border founders since 2016, with offices in Multan, Dubai and Westland, MI, and 100+ active clients across 50+ countries. If you haven't set up your entity yet, form your US LLC first. Our guide on how to form a US LLC from Pakistan walks through the order. For sales tax, resale certificates and other filings, see all US tax and compliance services.
Frequently asked questions
Can I get an EIN without an ITIN or SSN?
Yes. The IRS online application requires an SSN or ITIN, but international applicants can apply by phone, fax or mail using Form SS-4, entering "foreign" or N/A on line 7b.
Do I need an ITIN to sell on Amazon US?
Amazon's registration guide does not list an ITIN as a requirement, and its tax interview works with forms W-9 and W-8. Whether you personally need an ITIN depends on your US tax filing position, not on the marketplace. Confirm it with your adviser.
Do I need an ITIN to open a US bank account?
It depends on the provider. Some ask for a personal US tax ID and others don't, and policies change. Check each provider's current requirements.
How long does an ITIN take?
The IRS says to allow 7 weeks, or 9 to 11 weeks during tax season or for applications from overseas.
Is an ITIN the same as an EIN?
No. An EIN identifies a business entity. An ITIN identifies an individual who needs a US taxpayer ID but isn't eligible for an SSN.
Confirm the right path first
Not sure you need an ITIN at all? Tell us your LLC and EIN status. We'll confirm the right path, and the scope and pricing, before any filing.
Not legal, tax or immigration advice. Information reflects publicly available IRS guidance as of October 2026 and may change.
Sources
- IRS, Individual Taxpayer Identification Number (ITIN): https://www.irs.gov/tin/itin/individual-taxpayer-identification-number-itin
- IRS, Instructions for Form W-7 (reason boxes, original or certified documents, application routes, processing time): https://www.irs.gov/instructions/iw7
- IRS, Acceptance Agent Program: https://www.irs.gov/individuals/international-taxpayers/acceptance-agent-program
- IRS, Get an Employer Identification Number (online eligibility, international applicants, no fee): https://www.irs.gov/businesses/small-businesses-self-employed/get-an-employer-identification-number
- IRS, Instructions for Form SS-4 (line 7b, line 9a): https://www.irs.gov/instructions/iss4
- IRS, Single member limited liability companies: https://www.irs.gov/businesses/small-businesses-self-employed/single-member-limited-liability-companies
- IRS, Instructions for Form 5472: https://www.irs.gov/instructions/i5472
- IRS, Taxation of nonresident aliens (Form 1040-NR filing requirements): https://www.irs.gov/individuals/international-taxpayers/taxation-of-nonresident-aliens
- Amazon, How to register as an Amazon seller: https://sell.amazon.com/sell/registration-guide
- Amazon, U.S. tax identity and income reporting FAQs: https://pay.amazon.com/help/202096060
- Caldwell Tax Services, ITIN vs EIN for foreign LLC owners (third-party): https://www.caldwelltaxservices.com/blog/itin-vs-ein-foreign-llc-owner
