ITIN Guide for Non-Resident LLC Owners (2026)

An ITIN is a nine-digit Individual Taxpayer Identification Number the IRS issues to people who must file or be reported on a US tax return but are not eligible for a Social Security number. It always begins with the digit 9. The ITIN belongs to a person, not a company, and it exists for one purpose: federal tax processing.

An ITIN does not grant work authorization, immigration status, or Social Security benefits. It is a tax-only identifier. A non-resident who owns a US LLC, invests in US real estate, or receives US-source income that must be reported needs an ITIN so the IRS can match that person to a filing.

Most owners do not. You form and run a US LLC without an ITIN. The business operates on its own Employer Identification Number (EIN), which the IRS issues to non-residents who have no SSN and no ITIN. Formation, banking, and the LLC's own tax filings all key off the EIN, not your personal tax ID.

You need an ITIN only when you personally acquire a US filing duty. That is a separate trigger from simply owning the company. Many of our clients run a Wyoming or New Mexico LLC for years and never need an ITIN, because their situation never crosses one of the triggers below.

You need an ITIN when you, the individual, must file with or be reported to the IRS and have no SSN. The common triggers for LLC owners are specific and worth knowing before you apply.

• You must file Form 1040-NR. If your LLC produces income effectively connected to a US trade or business, or you have other reportable US-source income, you file a non-resident personal return and need an ITIN to do it.
• You are claiming a tax treaty benefit. To reduce or eliminate US withholding under a treaty, the IRS needs a personal tax ID for you.
• You receive a Schedule K-1 that requires reporting. A multi-member LLC or partnership passes income to you on a K-1, and reporting that income requires an ITIN.
• A payment processor demands personal verification. A platform such as PayPal sometimes requires an individual tax ID to verify the beneficial owner and keep the account open.

If none of these apply, hold off. Applying for an ITIN you do not need wastes weeks and sends your passport into a queue for nothing.

An EIN identifies your business. An ITIN identifies you. They are not interchangeable, and confusing them is the single most common mistake we correct. The table below shows exactly which one covers which job.

In short: every LLC needs an EIN. Only some owners need an ITIN. Get the EIN first, then add an ITIN if and when a personal filing trigger appears.

You apply on IRS Form W-7 and prove your identity with a certified copy of your passport. In most cases you attach the W-7 to a US tax return, because the ITIN is issued to process a specific filing. If you qualify under one of the IRS exceptions, such as certain treaty or third-party withholding situations, you apply without attaching a return and document the exception instead.

Your passport is the strongest single document, since it proves both identity and foreign status on its own. The catch is that the IRS wants an original or a certified copy. You do not want to mail your only passport to a processing center for weeks, which is where a Certifying Acceptance Agent solves the problem.

No, not if you use a Certifying Acceptance Agent. A CAA is a person the IRS authorizes to verify your identity documents in place of the agency. The CAA inspects your passport, certifies it, and submits your W-7, so your original document never leaves your hands.

This is the safest route for a non-resident. Mailing an original passport overseas carries a real risk of loss and leaves you without travel documents for the entire processing window. The CAA path removes that risk and reduces rejections caused by document errors, because the agent checks the packet before it goes to the IRS.

Processing takes about seven to eleven weeks from the day the IRS receives a complete Form W-7 package. Peak tax season and incomplete applications push that longer. A missing signature, an uncertified passport copy, or a W-7 filed without a required return or exception is the most common cause of a rejection that restarts the clock.

Plan around the timeline. If you know a K-1 or a 1040-NR is coming, start the ITIN early rather than at the filing deadline. Because the ITIN and the return travel together, a late start delays both.

Yes. An ITIN expires if you do not use it on a US federal tax return for three consecutive years, and once expired it must be renewed before it works on a new filing. The IRS also runs periodic expiration schedules that retire older ITINs by their middle digits.

Renewal uses the same Form W-7 you filed to obtain the number, submitted with proof of identity and foreign status, but you check the renewal box rather than applying as a first-timer. Filing a return with an expired ITIN causes processing delays and can hold up any refund or credit tied to that return. If you have an ITIN you no longer use because the LLC runs on its EIN and you have no personal US filing, letting it lapse is harmless; you renew only when a new personal filing obligation appears.

No. An ITIN is a private federal tax identifier issued by the IRS, and it never appears on any state public record. Applying for one does not undo the anonymity of a Wyoming or New Mexico LLC, which is a state public-record feature handled by your registered agent.

The ITIN sits with the IRS the same way the EIN and your tax returns do: known to the federal tax system, invisible to the public. A non-resident who files Form 1040-NR under an ITIN is identified to the IRS by name, exactly as intended, while the Secretary of State filing still carries only the registered agent. The two systems never touch, so a personal tax ID and a private company both coexist without conflict.

Our ITIN service is a flat $299. We prepare Form W-7, confirm you actually need an ITIN before you spend a cent, certify your passport through a Certifying Acceptance Agent so you keep your original, and pair the W-7 with the correct return or exception so the IRS does not bounce it.

We also keep the business side straight. Formation is $397 all-in for a Wyoming anonymous LLC, or from $347 total in New Mexico, and the LLC's own EIN is handled separately at $99. That means you never buy an ITIN you do not need, and the personal and business tax IDs stay cleanly separated the way the IRS expects.