How to Get a US ITIN as a Non-Resident

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If you have to deal with the US tax system but cannot get a Social Security number, an ITIN is the number that lets you do it. Non-resident founders, investors, and the foreign spouses of US filers all use one to file returns, claim treaty benefits, and stay compliant with the IRS. This guide covers the entire 2026 process: who needs an ITIN, the documents involved, how to file Form W-7, how long it takes, and how a Certifying Acceptance Agent lets you keep your passport.

What is an ITIN?

An Individual Taxpayer Identification Number is a nine-digit tax processing number the IRS issues to people who have a US filing requirement but are not eligible for a Social Security number (SSN). It always begins with a 9.

The important part is what it is not. It is strictly a tax number. It does not authorize work in the United States, it does not provide Social Security benefits, and it changes nothing about your immigration status.

Quick facts

Nine digits, always starting with 9
Free from the IRS itself, applied for on Form W-7
For tax purposes only, not work or immigration
Available to non-residents with no US visit required

Who needs an ITIN?

Tap the situation that sounds like yours.

I own a US LLC or corporation

If you need to file a personal US return or be identified on a company filing, you will usually need an ITIN to do it.

I earn US-source income (rentals, investments)

Rental income from US real estate or certain dividends creates a US filing or reporting need, and an ITIN is how you report it.

I want to claim a tax treaty benefit

To reduce or remove US withholding under a treaty between your country and the US, you need a taxpayer number, and that is the ITIN.

I am eligible for an SSN

Then you cannot get an ITIN. Citizens, green card holders, and anyone authorized to work in the US must use an SSN instead.

ITIN vs EIN vs SSN

These three get confused constantly. The distinction is simple.

Number	Belongs to	Purpose
ITIN	You, the individual	Personal US tax filing when you have no SSN
EIN	Your company	Business tax ID for banking, payroll, filings
SSN	Citizens and authorized workers	Personal ID for those eligible to work in the US

In short, your company gets an EIN, and you personally get an ITIN. Not set up yet? Start with our guide on how to start a US LLC as a non-resident, then come back here.

Documents you need

Every application must prove two things: your identity and your foreign status. The passport is the only single document that proves both on its own.

The passport shortcut

Use a valid passport and you avoid combining several documents such as a national ID plus a birth certificate. One critical rule: the IRS accepts originals or issuing-agency certified copies, never notarized copies.

Why mailing your passport is risky

If you send your original passport to the IRS in Austin, you are without it for weeks and cannot travel. A Certifying Acceptance Agent removes this risk entirely by verifying your documents in place.

The 5 steps to your ITIN

Tap each step to open it.

01 Confirm you actually need one

Check that you have a genuine US filing or reporting need and are not eligible for an SSN. Applying without a valid reason is the fastest way to get rejected.

02 Complete Form W-7

Fill in Form W-7 carefully. Your name and date of birth must match your passport exactly. Small mismatches are among the most common causes of rejection.

03 Attach your tax return

In most cases the IRS wants a federal return, such as Form 1040-NR, attached to your W-7. Some applicants are exempt, including certain treaty-benefit claims. This package cannot be e-filed.

04 Submit your application

There is no online submission for Form W-7 as of 2026. Mail it to the IRS ITIN Operation in Austin, apply in person at a Taxpayer Assistance Center, or use a Certifying Acceptance Agent who submits for you.

05 Receive your ITIN letter

Once approved, the IRS mails a letter with your assigned number. From there you can file, claim treaty benefits, and meet your US obligations.

Two ways to apply, compared

There is no online submission, so you have two realistic routes. Here is how they compare.

	Mail it yourself	Use a CAA
Your passport	Mailed away for weeks	Stays in your hand
Error checking	You are on your own	Checked before submission
If rejected	Start over, weeks lost	Usually caught early
IRS charge	$0	$0
Service fee	None	$220 with Proximal
Best for	Simple cases, no travel	Most non-residents

How long does an ITIN take in 2026?

Under normal conditions, allow about 7 weeks. During peak season (mid-January to end of April) or when applying from abroad, it usually takes 9 to 11 weeks, and can run longer if anything needs correcting.

ITIN PROCESSING TIME

Normal season about 7 weeks

Peak season or from abroad 9 to 11 weeks

Plan ahead

Apply 10 or more weeks before your deadline, and outside the January to April rush if you can. Early applications in autumn and winter tend to clear faster because IRS volume is lower.

Common mistakes to avoid

Tap each one to see the fix.

Name mismatches

Your W-7 must match your passport exactly. A misspelling or a missing middle name triggers rejection. Copy the details letter for letter.

Mailing notarized copies

The IRS does not accept them. Use originals, issuing-agency certified copies, or a CAA who verifies in place.

Forgetting the tax return

If your situation requires an attached return and you leave it out, the application is rejected. Confirm whether you qualify for an exception before filing.

Applying at peak season

January to April is the slowest window. Apply earlier in the year whenever possible to avoid held refunds.

Want your ITIN handled for you? As a Certifying Acceptance Agent, Proximal Solution prepares your Form W-7, verifies your documents so you keep your passport, and submits everything to the IRS. Our fee is $220. Book a free consultation or message us on WhatsApp.

Frequently asked questions

Can I get an ITIN without visiting the US?

Yes. The whole process runs from abroad by mail or through a Certifying Acceptance Agent. No US visit is required.

Do I need an ITIN if my company has an EIN?

Possibly. An EIN belongs to your company; an ITIN is your personal tax number. You need one when you personally have a US filing requirement and no SSN.

How much does it cost?

The IRS charges nothing for the ITIN itself. A Certifying Acceptance Agent charges a service fee to prepare, verify, and protect your passport. Proximal Solution charges $220.

Does an ITIN let me work in the US?

No. It is strictly for tax purposes and grants no work authorization, benefits, or immigration status.

What if my ITIN has expired?

Renew it on Form W-7 with the renewal box checked and your existing number entered. No tax return is needed for a renewal and the IRS charges nothing.

Published by Proximal Solution LLC. General information only, current as of 2026, and not tax or legal advice. IRS rules, fees, and processing times can change, so verify current requirements on IRS.gov or speak with a qualified professional before you act.