The IRS issues ITINs only to people with a federal tax purpose. Registering a US LLC doesn't create one on its own.
Here's how people usually end up in trouble: they register an LLC, get the EIN sorted, then a bank or payment platform asks them to provide an ITIN. They find a guide online, mail the paperwork โ and get it rejected or sent back. Because what the IRS is actually evaluating is whether the individual has a legitimate federal tax reason to need an ITIN, not whether they own a US company. Those are two different questions.
ITIN, SSN, EIN โ what each one actually is
ITIN stands for Individual Taxpayer Identification Number. It's a 9-digit number the IRS issues to individuals who don't have and aren't eligible for a Social Security Number. It starts with a 9. It exists purely for federal tax purposes. It doesn't carry any Social Security benefits, doesn't confer work authorization, and has no effect whatsoever on immigration status.
| Type | Purpose | Who it's for |
|---|---|---|
| ITIN | Individual federal tax identification | Individuals without and ineligible for an SSN who have a federal tax need |
| SSN | Personal identity and tax identification, including Social Security matters | Eligible individuals |
| EIN | Federal tax identification for a business or entity | LLCs, corporations, other entities |
| State registration number | Identifies an entity registered with the state government | Companies registered in that state |
A Chinese resident who owns 100% of a US LLC typically ends up dealing with two different numbers: the LLC's EIN, and their own ITIN if their personal tax situation creates a need for one. The EIN belongs to the business. The ITIN belongs to the individual. Neither substitutes for the other.
Who actually needs an ITIN
The determining factor is whether the individual has a federal tax filing or reporting obligation โ not whether they own a US company.
| Situation | Likely to need an ITIN? |
|---|---|
| Non-resident required to file Form 1040-NR and ineligible for an SSN | Yes |
| Applying for US tax treaty benefits that require a US tax ID | Yes |
| Receiving US-source income subject to reporting or withholding | Possibly, depending on the nature of the income and tax status |
| Filing jointly with a US citizen or resident spouse | Possibly, subject to eligibility conditions |
| Qualifying students, researchers, or dependents under W-7 rules | Possibly |
| Simply because you registered a US LLC | Not necessarily |
| Simply to open a bank or payment account | Not necessarily |
A bank or financial institution asking for an ITIN doesn't mean the IRS will actually approve your application. There are exceptions for passive income subject to third-party withholding and a few other scenarios, but each exception has its own documentation requirements and conditions.
Three questions to answer before you apply
First: do you already have an SSN, or are you eligible to get one? If yes, an ITIN application isn't appropriate for you โ check with the Social Security Administration if you're unsure. Second: do you have a qualifying federal tax purpose, such as a requirement to file a personal income tax return or eligibility under a specific IRS exception? Third: can you provide acceptable identity documentation? For most adult foreign applicants, a valid foreign passport satisfies both the identity and foreign-status requirements in one document. Without a passport, you'll typically need at least two qualifying alternative documents, at least one of which must include a photo.
What you need to submit
| Document | Notes |
|---|---|
| Form W-7 | Required, completed in English |
| Federal personal income tax return | Most first-time applicants need this (e.g. Form 1040-NR); exception claimants substitute proof documents instead |
| Valid passport | Simplest option โ one document covers both identity and foreign status |
| Other identity documents | If no passport, prepare the required combination per IRS rules |
| Exception documentation | Required if claiming an exception |
Mailing just a W-7 and a photocopy of your passport almost never works. If you're submitting directly to the IRS by mail, you need to send the original passport or a certified copy issued by the original issuing agency. Standard notarized copies aren't accepted.
Do you need to include a tax return?
Most first-time applicants do. A non-resident without an SSN who has US personal income to report submits Form W-7, Form 1040-NR, and identity documentation as a single package โ the W-7 goes in front of the tax return, mailed together, not as two separate submissions.
Exceptions exist for certain passive income subject to third-party withholding, tax treaty benefits, specific partnership income, and a few other scenarios. The IRS lists each exception in the W-7 instructions, with conditions and supporting document requirements spelled out per item. Checking a box on the form doesn't let you skip the tax return without actually meeting the exception's conditions.
Filling out Form W-7 correctly
Select "first-time applicant" unless you're renewing an existing ITIN that lapsed. Choose your reason for applying based on your actual situation โ don't copy someone else's selection just because it worked for them. Your name needs to match your passport exactly; inconsistent English-language spelling across your passport, tax return, and other documents is one of the most common causes of processing delays. The mailing address should be one where you can actually receive IRS correspondence; overseas addresses should follow the W-7 format. Fill in your actual foreign residential address โ don't list your US LLC's registered agent address as your place of residence. Date of birth, country of birth, and nationality should match your passport. If a foreign tax ID is requested, put in the accurate number, and don't enter the LLC's EIN in a field meant for your personal tax number. Review everything, then sign as required.
Three application routes โ which one makes sense for overseas applicants
Mailing directly to the IRS is what most people default to, and it works fine if you're comfortable gathering all the documents yourself and sending your original passport. The IRS says mailed documents are typically returned within about 60 days. Some IRS Taxpayer Assistance Centers offer in-person document review for ITIN applications โ not all locations provide this, so confirm availability and book ahead. The third option is working through an IRS-authorized Acceptance Agent or Certifying Acceptance Agent (CAA), who can operate inside or outside the US and verify your documents without you having to mail your original passport.
If you're applying from outside the US and don't want to part with your passport, a CAA is usually the best first option. Before you commit, confirm three things: that they actually hold current IRS authorization, what the service fee is, and whether a federal tax return is included in the quoted price. The IRS doesn't accept electronic W-7 submissions โ don't assume you can apply online the way you can with an EIN.
Mailing addresses:
USPS: Internal Revenue Service, Austin Service Center, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342
Private courier: Internal Revenue Service, ITIN Operation, Mail Stop 6090-AUSC, 3651 S. Interregional Hwy 35, Austin, TX 78741-0000
The P.O. Box address doesn't work for commercial couriers. If you're filing the W-7 together with a tax return, send everything as one package to the ITIN Operation address โ don't send the return separately to a general tax filing address.
Cost and timeline
| Item | Details |
|---|---|
| IRS application fee | $0 |
| Agent or accountant fees | Separate, depends on complexity and whether a tax return is included |
| Standard processing time | About 7 weeks |
| January 15 through April 30 | About 9โ11 weeks |
| Applying from outside the US | About 9โ11 weeks, plus additional time for international mail in both directions |
The clock starts when the IRS receives a complete application, not when you drop it in the mail. Incomplete documentation or unacceptable identity documents will stretch the timeline further. After 7 weeks you can call 267-941-1000 from outside the US to check your status. If you're working around a tax filing deadline, applying during slower periods gives you more breathing room.
What the notices mean when they arrive
CP565 means your ITIN has been assigned โ nothing more to do. CP566 means the IRS needs additional information; respond within the deadline shown on the notice and include the notice itself with your reply. CP567 means your application was rejected; fix the problem and resubmit a complete new application. Common rejection reasons: name doesn't match the passport, identity documents don't qualify, W-7 is incomplete, the required tax return wasn't included, an exception was claimed without supporting documentation, or the stated reason doesn't establish a valid federal tax purpose. Don't just remail the same package after a rejection โ read what the notice says first.
Expiration and renewal
An ITIN that doesn't appear on any federal return for three consecutive tax years expires on December 31 of the year following the third unused year. If it wasn't used in 2022, 2023, or 2024, it expired December 31, 2025. Once expired, using it on a personal income tax return requires filing a W-7 renewal first, which generally needs a tax return attached as well. An ITIN that only ever appeared on third-party information returns but was never used on a personal return doesn't require immediate renewal, but will need to be renewed before it can be used on a personal return in the future.
Does registering a US LLC mean you need an ITIN?
Not automatically. Take a common scenario: a Chinese resident, sole owner, registered a single-member LLC in Wyoming or Delaware, no SSN. There are three separate questions worth thinking through on their own.
Does the LLC need an EIN? That depends on the entity structure and how it's being used. Does the LLC need to file Form 5472 plus a Pro Forma Form 1120? That depends on whether it qualifies as a foreign-owned disregarded entity and whether there were any reportable transactions during the year. Does the owner personally need an ITIN? That depends on whether the individual has a federal personal income tax filing obligation, needs tax treaty treatment, or has some other legitimate tax purpose. The LLC having a Form 5472 filing obligation doesn't automatically create an ITIN requirement for the owner as an individual.
The mistakes people make most often
Treating an ITIN as a required step in registering a US LLC. Assuming that having no US income automatically means no ITIN is needed โ what actually matters is whether there's a personal filing or reporting obligation. Assuming anyone can skip the tax return without genuinely qualifying for an exception. Sending a passport photocopy directly to the IRS. Using a notarized copy where a certified copy is required. Resubmitting the same application unchanged because the first one is taking a long time. Assuming an ITIN grants work authorization in the US.
This article is general informational content, not legal or tax advice. If your situation involves multiple years of US tax filings, US-source income, tax treaty benefits, or complex cross-border business arrangements, it's worth having a US CPA, Enrolled Agent, or tax attorney familiar with international tax confirm what applies to your specific circumstances.