ITIN for Foreigners: Complete Guide to Requirements & Application Process

Table of Contents#

1. What is an ITIN? Key Facts & Purpose
2. Who Needs an ITIN? Eligible Foreigners
3. ITIN Application Requirements: Documents You Must Submit 3.1 Primary Identification Documents 3.2 Secondary Identification Documents (If Primary Isn’t Available) 3.3 Special Cases: Dependent ITIN Applications
4. Step-by-Step ITIN Application Process 4.1 Fill Out Form W-7 4.2 Gather Supporting Documents 4.3 Submit Your Application (3 Methods) 4.4 Wait for Processing & Follow-Up
5. Common Mistakes to Avoid When Applying for an ITIN
6. Renewing Your ITIN: What You Need to Know
7. Frequently Asked Questions (FAQs)
8. References

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1. What is an ITIN? Key Facts & Purpose#

An Individual Taxpayer Identification Number (ITIN) is a 9-digit number issued by the U.S. Internal Revenue Service (IRS) exclusively for tax purposes. Unlike an SSN, it does not grant work authorization or eligibility for Social Security benefits.

ITINs are used to:

• File federal tax returns for non-resident aliens with U.S.-source income.
• Claim tax treaty benefits to reduce or eliminate U.S. tax liability.
• Claim dependents or spouses on U.S. tax returns (even if they have no taxable income).
• Apply for certain financial services, such as opening a U.S. bank account or obtaining a mortgage.
• Receive tax refunds if you overpaid U.S. taxes.

All ITINs start with the number “9” and follow the format XXX-XX-XXXX.

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2. Who Needs an ITIN? Eligible Foreigners#

You need an ITIN if you fall into one of the following categories:

• Non-resident aliens required to file a U.S. federal tax return (e.g., from rental income, dividends, royalties, or freelance work earned in the U.S.).
• Resident aliens (those who meet the substantial presence test or hold a green card) who do not qualify for an SSN.
• Spouses or dependents of U.S. citizens or resident aliens, even if they have no taxable income, to be claimed on a tax return.
• Foreign students, scholars, or researchers with taxable U.S. income (even if on an F-1 or J-1 visa).
• Foreign investors with U.S.-source income subject to withholding tax.
• Individuals applying for tax treaty benefits to avoid double taxation.

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3. ITIN Application Requirements: Documents You Must Submit#

To apply for an ITIN, you must submit documents that prove both your identity and foreign status. The IRS accepts two types of documents: primary and secondary.

3.1 Primary Identification Documents#

These documents alone prove both identity and foreign status. The preferred primary document is a valid, unexpired passport. If you submit a passport, no additional documents are needed.

Other acceptable primary documents include:

• A valid, unexpired U.S. visa (plus a foreign national ID card showing your photo and birth date).
• A valid, unexpired consular identification document issued by a foreign government.

3.2 Secondary Identification Documents (If Primary Isn’t Available)#

If you cannot obtain a primary document, you can submit a combination of secondary documents that together prove your identity and foreign status. These must be original or certified copies (issued by the government agency that issued the document). Examples include:

• Foreign birth certificate (proves foreign status) + foreign driver’s license (proves identity with photo).
• Foreign voter registration card (identity) + medical record (foreign status).
• School transcript (identity for minors) + valid foreign driver's license (proves identity with photo).

Note: Secondary documents must be current (except birth certificates, which are always valid) and show your full name, photo, and/or birth date.

3.3 Special Cases: Dependent ITIN Applications#

For dependents under 18:

• If the dependent is a U.S. resident (born in the U.S. or meets the substantial presence test), they may qualify for an SSN instead of an ITIN.
• For foreign dependents, submit a birth certificate (to prove relationship and foreign status) plus a passport (or other photo ID). If the dependent is under 6, a passport photo may be accepted in place of a full passport, along with a birth certificate and another document (e.g., school record or medical bill).

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4. Step-by-Step ITIN Application Process#

Follow these steps to apply for an ITIN successfully:

4.1 Fill Out Form W-7#

The core of your application is IRS Form W-7, Application for IRS Individual Taxpayer Identification Number. You can download it from the IRS website or request a copy by mail.

Key sections to complete:

• Personal Information: Provide your full name (exactly as it appears on your identification documents), date of birth, and address.
• Reason for Applying: Check the box that best describes your situation (e.g., Box 1a: Non-resident alien filing a U.S. tax return; Box 1c: Dependent of a U.S. citizen or resident alien).
• Supporting Documents: List all documents you’re submitting to prove identity and foreign status.
• Signature: Sign the form (a parent/guardian must sign for minors or incapacitated individuals).

4.2 Gather Supporting Documents#

Submit original documents or certified copies (issued by the government agency). If you don’t want to send original documents (which the IRS will return), use an IRS-authorized Acceptance Agent to verify your documents in person, or request a certified copy from the issuing agency.

4.3 Submit Your Application (3 Methods)#

You have three options to submit your Form W-7 and supporting documents:

1. Mail: Send to the IRS address listed on the Form W-7 instructions. For most applications (without a tax return), the address is:

   Internal Revenue Service
   ITIN Operation
   P.O. Box 149342
   Austin, TX 78714-9342
   

   If attaching a tax return, use the state-specific address listed in the instructions.
2. In-Person at an IRS Taxpayer Assistance Center (TAC): Schedule an appointment in advance. TAC staff can verify original documents so you don’t have to mail them.
3. Via an Acceptance Agent: Authorized agents include tax professionals, banks, and financial institutions. They review and verify your documents, then submit your application to the IRS on your behalf—this avoids sending originals through the mail.

4.4 Wait for Processing & Follow-Up#

The IRS typically processes ITIN applications in 7–10 weeks. During peak tax season (January–April), processing times may extend to 12 weeks. Once approved, you’ll receive a letter with your ITIN.

If you don’t hear back after 10 weeks, check the status by calling the IRS ITIN hotline at 1-800-829-1040. Have your application details (name, address, date of birth) ready.

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5. Common Mistakes to Avoid When Applying for an ITIN#

To prevent delays or rejection, steer clear of these errors:

• Choosing the wrong reason for applying: Selecting an incorrect box on Form W-7 is a frequent mistake. Double-check your eligibility to pick the right option.
• Submitting expired documents: All primary documents must be unexpired. Expired passports or visas will lead to rejection.
• Sending photocopies instead of originals/certified copies: The IRS only accepts original documents or certified copies; regular photocopies are invalid.
• Forgetting to attach a tax return: Most applicants must submit a completed federal tax return with Form W-7 (exemptions include dependents applying to be claimed on a return).
• Incomplete Form W-7: Missing information (e.g., signature, date of birth) will cause processing delays.
• Name mismatch: Ensure the name on Form W-7 exactly matches the name on your identification documents.

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6. Renewing Your ITIN: What You Need to Know#

ITINs expire if not used on a federal tax return for three consecutive years. For example, if you didn’t use your ITIN on returns for 2021, 2022, and 2023, it will expire on December 31, 2023.

To renew your ITIN:

1. Fill out Form W-7, checking Box 7 (Renewal of Existing ITIN).
2. Submit supporting documents to prove identity and foreign status (same as the initial application).
3. Submit via mail, in-person at a TAC, or through an Acceptance Agent.

Renew before filing your tax return if your ITIN has expired—otherwise, the IRS may delay your return and refund.

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7. Frequently Asked Questions (FAQs)#

7.1 Can I use an ITIN to work in the U.S.?#

No. An ITIN is exclusively for tax purposes. For employment, you need an SSN or Employment Authorization Document (EAD).

7.2 Can I get a tax refund with an ITIN?#

Yes. If you overpaid taxes or qualify for tax credits (e.g., Child Tax Credit), you can claim a refund using your ITIN.

7.3 How long does an ITIN last?#

An ITIN remains valid indefinitely as long as you use it on a federal tax return every three years. If not used for three consecutive years, it expires and must be renewed.

7.4 Can my foreign dependent get an ITIN?#

Yes. If your dependent is a non-U.S. citizen and meets eligibility requirements (e.g., you provide financial support), you can apply for an ITIN to claim them on your tax return.

7.5 Do I need to update my ITIN if my name changes?#

Yes. Submit a new Form W-7 along with supporting documents (e.g., marriage certificate) to update your ITIN record with the IRS.

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8. References#

1. IRS Form W-7 Instructions: https://www.irs.gov/forms-pubs/about-form-w-7
2. IRS ITIN Guidelines: https://www.irs.gov/individuals/international-taxpayers/individual-taxpayer-identification-number-itin
3. IRS Acceptance Agent Program: https://www.irs.gov/individuals/international-taxpayers/acceptance-agent-program
4. ITIN Renewal Information: https://www.irs.gov/individuals/international-taxpayers/renew-your-itin