Most foreign business owners do not need an ITIN just because they opened a U.S. LLC. In many cases, your company needs an EIN, while you only need an ITIN if you have a personal U.S. tax filing duty, such as filing Form 1040-NR or asking for treaty treatment.
Here’s the short version:
- An ITIN is your personal tax number
- An EIN is your company’s tax number
- You can often form an LLC and get an EIN without an ITIN
- Form W-7 is the form used to apply for an ITIN
- A passport is usually the simplest ID document
- IRS processing often takes about 7 weeks
- During Jan. 15–Apr. 30 or from outside the U.S., it may take 9–11 weeks, and sometimes up to 14 weeks
- The IRS may hold original documents for up to 60 days before returning them
If I were applying, I’d focus on four things first:
- Check whether I need an ITIN at all
- Fill out Form W-7 with the exact same name shown on my passport
- Attach the right tax return or IRS exception proof
- Send the packet the right way to avoid delays
A few mistakes cause many delays: the wrong W-7 reason box, name mismatches, missing Form 1040-NR, expired ID, or plain photocopies. The IRS does not accept notarized copies for this process.
Quick comparison
| Tax ID | Who it belongs to | What it’s for | Do foreign founders always need it? |
|---|---|---|---|
| EIN | The business | Banking, payroll, business tax filing | Often yes |
| ITIN | The individual owner | Personal U.S. tax filing and treaty claims | No |
| SSN | U.S. person with work authorization | Personal tax and wage reporting | No, unless eligible |
Bottom line: if you’re a foreign owner, the first question is not “How do I get an ITIN?” It’s “Do I even need one?” That one step can save time, mailing issues, and weeks of back-and-forth with the IRS.
1. Confirm Whether You Need an ITIN or a Different Tax ID
Forming a U.S. LLC does not automatically mean you need an ITIN. In many cases, the LLC can get an EIN on its own, and that handles the business side of things.
Here’s the simple version of how these tax IDs fit together:
| Tax ID | Issued To | Primary Use |
|---|---|---|
| EIN | The LLC | Business banking, hiring employees, and business tax reporting |
| ITIN | The individual owner | Personal tax returns and treaty claims |
| SSN | U.S. citizens and work-authorized residents | Personal federal tax purposes |
The key point is this: the EIN belongs to the business, while the ITIN belongs to you as the owner.
When a Foreign Owner Does Not Need an ITIN
If your LLC has no U.S.-connected business income (ECI), you may not need an ITIN. In that case, Form 5472 can often be filed without one by using a foreign reference ID number.
When an ITIN Is Required for Filing or Reporting
You need an ITIN when you have a personal U.S. tax filing duty. The most common reason is filing Form 1040-NR, which may be required if your LLC has ECI. An ITIN may also be needed if you want to claim treaty benefits.
Once you confirm that you need an ITIN, the next step is Form W-7 and the identity documents the IRS asks for.
2. Prepare Form W-7 and the Required Identity Documents
Use the current Form W-7 from IRS.gov. The IRS rejects old versions. Once you know you need an ITIN, fill out Form W-7 using the exact details shown on your passport.
How to Fill In the Key Fields on Form W-7
Small mismatches can slow things down. So it helps to copy each detail carefully, character for character.
| Form W-7 Field | What to Enter |
|---|---|
| Reason for Applying | Box (b) for a U.S. tax return; Box (a) for treaty benefits; Box (h) for qualifying exceptions |
| Line 1a – Name | Your full legal name exactly as it appears on your passport, including accents, hyphens, and spacing |
| Line 2 – Mailing Address | Use an address where you can reliably receive mail; it can be U.S. or foreign |
| Line 3 – Foreign Address | Your permanent address outside the U.S.; do not use a P.O. box or "care of" line |
| Line 6b – Foreign Tax ID | Enter your home-country tax identification number, if you have one |
| Line 6d – ID Document | Enter the passport or other ID document number, issuing country, and expiration date |
Which Documents the IRS Accepts and How to Avoid Document Problems
A valid, unexpired passport is the ONLY stand-alone document the IRS accepts because it proves both identity and foreign status. For most people, it’s the simplest path.
If you don’t send a passport, you need at least two other documents from the IRS-approved list, and at least one of them must include a photo.
| Document | Proves Identity | Proves Foreign Status | Stand-Alone | Notes |
|---|---|---|---|---|
| Passport | Yes | Yes | Yes | The simplest option for most applicants |
| National ID Card | Yes | Yes | No | Must include name, photo, address, date of birth, and expiration date |
| Civil Birth Certificate | Yes | Yes* | No | *Foreign only; no expiration date |
| Foreign Driver’s License | Yes | No | No | Requires a second document proving foreign status |
| U.S. Visa | Yes | Yes | No | Issued by the U.S. Department of State |
| Foreign Voter’s Registration Card | Yes | Yes | No | Must be current |
Send original documents or agency-certified copies. Notarized photocopies do not count.
The IRS usually returns original documents to your mailing address within 60 days. If mailing your passport makes you uneasy, there’s another route: a Certifying Acceptance Agent can check your documents in person, so you keep your originals with you.
Next, attach the required tax return or exception proof.
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3. Attach the Correct Tax Return or Exception Proof
Once your Form W-7 is done, attach either the tax return you need or the exception proof that fits your reason for applying. The key is simple: the reason you put on Form W-7 needs to line up with the document you send in.
When to Include Form 1040-NR with Form W-7
Use Form 1040-NR if you have effectively connected income from a U.S. trade or business. If you have your own U.S. filing duty, send Form W-7 and Form 1040-NR together.
When an IRS Exception May Apply Instead of a Tax Return
If you are not filing a tax return with Form W-7, you may be able to use an IRS exception instead. In that case, attach the proof that matches that exception. If you qualify, check box (h) on Form W-7 and include documents that match the exception exactly.
| Exception | Typical Situation | Required Supporting Documents |
|---|---|---|
| Exception 1 | Receiving interest, dividends, royalties, or annuities subject to third-party withholding, or claiming tax treaty benefits | Letter from the withholding agent and a copy of the relevant tax treaty page |
| Exception 2 | Receiving scholarships, fellowships, or honoraria | Letter from the school, university, or awarding institution |
| Exception 3 | Having a U.S. mortgage that requires third-party reporting | Copy of the mortgage contract or statement |
| Exception 4 | Disposing of a U.S. real property interest | Copy of the sales contract or Form 8288-B |
| Exception 5 | Holding interest-bearing bank deposits | Letter from the financial institution |
Attach only the documents that match the exception you checked.
4. Submit the Application and Plan for IRS Processing Time
Once Form W-7 is done, you can send it in by mail, through an Acceptance Agent or CAA, or at an IRS Taxpayer Assistance Center (TAC). The best option depends on where you are, how fast you need things to move, and whether you want to mail your passport. One detail matters more than it seems: use the exact same name and document details that appear on Form W-7.
Mail, Acceptance Agent, or IRS Office: Choosing the Right Submission Method
Here’s the side-by-side view:
| Method | Cost | Document Handling | Best For |
|---|---|---|---|
| Mail to IRS | Postage only | You may need to mail original supporting documents, and the IRS can hold originals for up to 60 days | Simple cases where you can wait for document return |
| Acceptance Agent (AA) | Fee-based | Can review and submit the package, but cannot authenticate every document | Applicants who want help obtaining an ITIN and submitting the form |
| Certifying Acceptance Agent (CAA) | Fee-based | A CAA can authenticate most supporting documents, so you usually do not mail your passport to the IRS; authenticated documents are returned at the appointment | Foreign founders who want to avoid mailing originals |
| IRS Taxpayer Assistance Center (TAC) | Free | Documents are authenticated on-site and returned the same day | Applicants in the U.S. who can get an appointment |
If you mail the package, send it to the right IRS address:
- USPS: Internal Revenue Service, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342
- FedEx/UPS: Internal Revenue Service, ITIN Operation, Mail Stop 6090-AUSC, 3651 S. Interregional Highway 35, Austin, TX 78741-0000
A TAC can be a good option if you’re in the U.S. and want your documents checked on-site. But there’s a catch: not every TAC handles ITINs, so confirm that before you book an appointment.
How to Track Your Application and Respond to IRS Requests
After submission, the main job is waiting for the IRS notice. In many cases, the IRS sends a notice in about 7 weeks. During Jan. 15–Apr. 30, and for filings from outside the U.S., processing usually takes 9–11 weeks and can stretch to 14 weeks.
If that window passes and you still haven’t heard back, call the IRS:
- In the U.S.: 800-829-1040
- Outside the U.S.: 267-941-1000
The notice you get tells you what happened. CP565 means your application was approved, CP566 means the IRS needs more information, and CP567 means the application was rejected.
If a tax deadline is getting close and your ITIN still hasn’t shown up, file Form 4868 for an automatic extension. That can help you avoid late-filing penalties. And if you mailed original documents and they haven’t come back within 60 days after the IRS received them, call to follow up.
When mailing original documents, use trackable shipping such as USPS Priority Mail Express, FedEx, or UPS. If the IRS asks for more information, respond fast.
5. Common Mistakes That Delay Approval and How to Avoid Them
Once you finish Form W-7 and pull together your documents, a few small errors can slow everything down. Before you mail your packet, check for these trouble spots:
| Mistake | What Happens | How to Avoid It |
|---|---|---|
| Wrong reason box | The IRS rejects the application | Match the box to your filing basis |
| Name mismatch | W-7, passport, and return must match exactly | Copy your passport exactly |
| Uncertified document copies | Photocopies and notarized copies are rejected | Send originals or agency-certified copies |
| Missing tax return | The packet is held or rejected | Attach Form 1040-NR unless a documented exception applies (such as when you file IRS Form 5472 as a non-resident) |
| Expired documents | The IRS rejects the packet | Confirm all ID documents are valid at submission |
| Missing signature | Processing delay | The applicant – or an authorized parent/guardian – must sign Form W-7 |
| Incomplete fields | Application is delayed | Fill in every required field: foreign address, date of birth, and citizenship country |
One mistake that trips people up all the time: do not mail Form 1040-NR separately from Form W-7. Send them together in the same packet.
If you want an extra check before filing, a Certifying Acceptance Agent can spot document problems early.
FAQs
Can I get an EIN without an ITIN?
Yes – you can get an EIN for your U.S. LLC without an ITIN or Social Security Number (SSN).
Here’s the simple version: an EIN is a tax ID for the business. An ITIN is a tax ID for you as a person. They do different jobs.
To get an EIN, you can file Form SS-4 with the IRS and note your foreign status if needed. That’s how many non-resident LLC owners handle it.
In practice, a lot of founders get the EIN first so they can move forward with business setup. Then, if they later need an ITIN for personal tax filing or tax treaty claims, they apply for that separately.
What if I need my passport while the IRS has it?
If there’s any chance you’ll need your passport for travel or anything else within 60 days of applying, don’t mail the original to the IRS.
Instead, apply in person at an IRS Taxpayer Assistance Center or through a Certifying Acceptance Agent. You can also send a certified copy from the agency that originally issued the passport.
Do I need an ITIN to open a U.S. bank account?
No. Foreign business owners can usually open a U.S. business bank account with an EIN, which is the tax ID for the LLC.
Some banks may still ask for an ITIN as part of identity checks or compliance steps, but that isn’t the standard rule. The IRS issues ITINs for federal tax purposes, not for general banking.
