Most non-US founders do not need an ITIN to form a US LLC or to get an EIN. Those use the company's EIN, not your personal tax ID. You need an ITIN only when you personally have a US federal tax obligation: usually filing a US individual tax return, or claiming a tax treaty benefit. General education, not tax advice.
An LLC is a state filing and an EIN comes from the IRS. Neither one needs your personal ITIN.
If you must report US income on a Form 1040-NR, or you are claiming a tax treaty benefit, you need a taxpayer ID, which for a non-resident means an ITIN.
An ITIN does not grant work rights or change your immigration status. It exists so the IRS can process your filing.
So when do non-US founders actually need an ITIN? It is one of the most over-asked questions in US company setup, usually because an "ITIN" and an "EIN" sound alike and get bundled together by generic guides. They are not the same thing, and conflating them sends a lot of founders chasing a number they do not need. The honest answer is narrow: you need an ITIN only when you, the individual have a US tax filing to make, not when your company needs to exist or get paid.
What an ITIN actually is (and what it is not)
An ITIN, or Individual Taxpayer Identification Number, is a nine-digit number the IRS issues to a person who needs a US taxpayer ID for federal tax purposes but is not eligible for a Social Security Number. The key word is individual. An ITIN identifies you to the IRS. It is the personal counterpart to the EIN, which identifies your business.
That single distinction clears up most of the confusion. When a bank, a form, or a guide says you need a "tax ID," the right question is always: a tax ID for the company, or for me personally? For the company, that is the EIN. For you, only sometimes, and only for tax filing.
You do not need an ITIN to form an LLC or get an EIN
This is the myth worth killing first, because it costs founders weeks. Forming a US LLC happens at the state level and asks nothing about your personal US tax ID. Getting the company's EIN is an IRS step, and the IRS is explicit that a foreign responsible party who has no SSN or ITIN does not need one. You write "Foreign" on Form SS-4, line 7b, and the EIN is still issued.
So if your goal is simply to launch the company, open a business bank account, and start invoicing, the ITIN is usually not part of the path. The company's EIN does that work. Apply for an ITIN at that stage and you have added a 7-to-11-week wait and a passport in the mail for nothing.
When you do need an ITIN
You cross into ITIN territory when the obligation becomes personal: when you, as an individual, have to file with or claim something from the IRS. The clearest way to see it is by situation.
Your situation | Need an ITIN? | Why |
|---|---|---|
Forming a US LLC | No | It is a state filing with no field for your personal tax ID. |
Getting an EIN as the foreign responsible party | No | You enter "Foreign" on Form SS-4, line 7b; the IRS issues the EIN without an ITIN. |
You must file a US individual return (Form 1040-NR) on US income | Yes | Filing a personal US return requires a taxpayer ID; with no SSN, that is an ITIN. |
Claiming a US tax treaty benefit (such as reduced withholding) | Often yes | The IRS lets certain non-residents get an ITIN to claim treaty benefits even without a filing requirement. |
Receiving a US partnership K-1 with tax withheld for you | Usually yes | You generally need the ITIN to file and reconcile the amount withheld. |
Opening a personal US bank or brokerage account | Sometimes | A few institutions ask for one; many do not. That is their rule, not an IRS requirement. |
Notice the pattern: every "yes" is a moment where you are filing or claiming, and every "no" is the company simply existing or transacting. Whether a single-member LLC's US activity actually creates a personal filing requirement for you depends on your facts, your country, and any treaty, so confirm your own position with a qualified tax professional before assuming either way.
What actually creates that personal obligation is worth understanding, because it is narrower than many founders fear. You generally have a US individual filing in two cases. The first is income effectively connected with a US trade or business, which is reported on Form 1040-NR. The second is US-source income on which tax was withheld, where you want to claim a treaty rate back. A non-resident running an online business with no US office, staff, or dependent agent often has neither, which is exactly why most never need an ITIN. Because effectively connected income turns on your own facts and any treaty between the US and your country, treat this as the line to check with a tax professional rather than a self-diagnosis.
The LLC's own filings use its EIN, not your ITIN
It helps to separate two layers, because they are easy to blur. The company has its own obligations, you may have yours, and the two use different numbers. The one that catches founders out is the annual federal report. A foreign-owned single-member LLC must file Form 5472 with a pro forma Form 1120 every year, even with no income, but that filing is made with the LLC's EIN, never your personal ITIN. So the company's annual compliance never forces you to get an ITIN. The ITIN trigger is always something personal, a return you must file or a treaty benefit you claim, not the LLC simply existing or filing its own forms.
The most common ITIN mistake we see
Helping non-US founders set up US companies, the same ITIN misstep comes up again and again: applying for one before there is any reason to. A founder reads that they need a "US tax ID," assumes it means an ITIN, and starts the W-7 process, mailing identity documents and waiting weeks. All the while, the only number their business actually needed was the EIN they could already get. The reverse mistake is rarer but more serious: a founder who genuinely has a US filing obligation puts off the ITIN, then cannot file or claim a treaty benefit on time. The takeaway is the same either way: do not apply for an ITIN out of caution, and do not skip one when a real filing depends on it.
If you do need one: how it works, briefly
When an ITIN is genuinely required, you apply on Form W-7. As a rule you attach it to the federal tax return it supports and send them together, rather than filing the return separately. Two exceptions matter for founders: you can apply without a return if you are claiming a tax treaty benefit, or if you fall under another listed exception such as certain third-party withholding. The identity documents you need, and the ways to get them verified, are covered in the next section.
Plan for time: the IRS asks you to allow about seven weeks for a decision, and nine to eleven weeks during tax season or when you apply from outside the US. One more practical note: an ITIN that is not used on a US tax return for three consecutive years expires, so there is no benefit to getting one early. If an ITIN you genuinely needed does lapse, you renew it by filing a fresh Form W-7 with your next return, using the same identity documents.
How to verify your identity for an ITIN
An ITIN application has to prove two things about you: your identity and your foreign status. A current passport is the only single document that proves both. Without a passport, the IRS wants two approved documents instead, such as a national identity card plus a birth certificate. You then have three ways to get those documents verified:
Method | How it works | Keep your passport? |
|---|---|---|
Mail to the IRS | Send your original passport, or copies certified by the issuing agency, to the IRS, which typically returns originals within about 60 days | No, it is in the post during that window |
Certifying Acceptance Agent (CAA) | An IRS-authorised agent verifies your documents in person or remotely and submits the W-7 for you, usually for a fee | Yes |
IRS Taxpayer Assistance Center | Book an appointment and have your documents checked in person, which means travelling to the US | Yes |
For a founder based outside the US, a Certifying Acceptance Agent is usually the most practical of the three: it keeps your passport in your hands and avoids posting it abroad for weeks. Either way, this is a personal tax step to handle once a real filing obligation exists, alongside a tax professional.
Quick FAQ
Do I need an ITIN to form a US LLC?
No. Forming an LLC is a state-level filing that does not ask for your personal taxpayer ID. You can form the company, and later get its EIN from the IRS, without ever holding an ITIN. An ITIN only becomes relevant if you personally have to file a US tax return.
Do I need an ITIN to get an EIN?
No. The IRS allows a foreign responsible party with no SSN or ITIN to obtain an EIN by entering "Foreign" on Form SS-4, line 7b. You do not need to get an ITIN first, and getting one will not speed up the EIN.
When do non-US founders actually need an ITIN?
When the obligation is personal rather than corporate: most often when you must file a US individual return (Form 1040-NR) because you have US income to report, or when you are claiming a US tax treaty benefit. Whether your situation triggers that is a tax question for a qualified professional.
Do I need an ITIN to open a US bank account?
Usually not for a business account, which is opened in the company's name using its EIN. Some banks may ask an individual owner for personal identification, and a few request an ITIN, but that is each institution's policy rather than a federal requirement.
How long does an ITIN take, and does it expire?
The IRS asks you to allow about seven weeks, or nine to eleven weeks during tax season (mid-January to the end of April) or when applying from overseas. An ITIN that is not used on a US tax return for three consecutive years expires, so applying before you need it offers no advantage.
How do I verify my identity for an ITIN without mailing my passport?
Use an IRS Certifying Acceptance Agent (CAA). A CAA is authorised to verify your passport in person or remotely and submit Form W-7 for you, so your original document stays with you instead of being posted to the IRS for weeks. The other routes are mailing originals to the IRS or visiting an IRS Taxpayer Assistance Center in person.
Does my LLC's Form 5472 filing require me to have an ITIN?
No. A foreign-owned single-member LLC files Form 5472 with a pro forma Form 1120 using the LLC's EIN, not your personal ITIN. The company's annual reporting never depends on you having an ITIN; an ITIN only becomes relevant when you personally must file a US return or claim a treaty benefit.
Official references
How this article was prepared
ITIN rules are set by the IRS, so this guide is built on IRS source material rather than generalities: the IRS ITIN pages, the Form W-7 guidance, the U.S. taxpayer identification number requirement, and the Form SS-4 instructions on getting an EIN with a foreign responsible party. We reviewed it for accuracy, for what genuinely applies to a non-US founder versus a US resident, and for honesty about the line between what a company needs (an EIN) and what an individual sometimes needs (an ITIN). This is general information, not tax advice; your filing obligations depend on your own facts.
Most non-US founders we work with need the company's EIN, not a personal ITIN. If that is you, read the full EIN & ITIN guide. When you start your US LLC with CORPBOLT, we help you get the company formed and its EIN underway; an ITIN, where you actually need one, is a personal tax step you would handle with a tax professional.
Forming your company: CORPBOLT forms your Wyoming LLC with a U.S. business address from $349/year; Launch ($599) adds the EIN and a digital mailbox. See how CORPBOLT does this →
Approval note: Eligibility and approval decisions are made by each bank, fintech, and payment processor. Requirements can vary by provider, country, business model, and account history.
