Learn About Getting an Individual Taxpayer Identification Number

What Is an Individual Taxpayer Identification Number (ITIN)?

An Individual Taxpayer Identification Number (ITIN) is a nine-digit tax identification number issued by the Internal Revenue Service (IRS). The number follows the same format as a Social Security Number (SSN) but is used specifically for tax purposes. ITINs are formatted as 9XX-7X-XXXX, where the first digit is always 9.

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The IRS created the ITIN program in 1996 to allow individuals who are not U.S. citizens and do not have a Social Security Number to file tax returns and pay taxes. According to the IRS, approximately 6.5 million ITINs were active as of recent tax years. These numbers allow non-citizens to maintain tax compliance with U.S. law while protecting their privacy and financial information.

ITINs serve a practical purpose in the U.S. tax system. They enable individuals to report income, claim tax refunds, and meet filing requirements without a Social Security Number. The IRS uses ITINs to track tax returns, payments, and financial activity for individuals who have income in the United States but lack citizenship status or SSN authorization.

It is important to understand that an ITIN is not the same as a Social Security Number, and it does not confer work authorization, immigration status, or change a person's legal standing. The number exists solely for tax reporting and filing purposes. A person can have an ITIN and still be subject to immigration laws and restrictions that apply to their status.

Practical takeaway: An ITIN is a tool for tax filing, not a document that changes legal status or provides benefits beyond tax reporting. Understanding this distinction helps clarify what an ITIN is used for and what it cannot do.

Who May Need an ITIN

Many categories of people may need an ITIN to file taxes in the United States. The most common group includes non-citizens who have earned income in the U.S. and are required to file tax returns. This includes individuals on nonimmigrant visas, such as H-1B visa holders (specialty occupation workers), L-1 visa holders (intracompany transfers), and O-1 visa holders (individuals with extraordinary ability in their field).

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Foreign nationals who are residents for tax purposes also typically need an ITIN. Under IRS rules, a person becomes a tax resident if they are physically present in the United States for at least 31 days in the current year and 183 days over a three-year period (counting current and prior two years). Once this threshold is met, the person must report worldwide income to the IRS, even if they are not a citizen.

People without Social Security Numbers who have U.S. source income may need an ITIN. This includes:

• Foreign students working part-time at universities or in off-campus employment
• Nonresident aliens with investment income, rental income, or capital gains from U.S. property
• Self-employed individuals who are not citizens but have business income
• Dependents of U.S. citizens or residents who are not eligible for Social Security Numbers
• Individuals receiving certain types of U.S. source income like gambling winnings, royalties, or partnership distributions

Spouses and dependents of U.S. citizens or residents may also need ITINs. Even if a spouse is not authorized to work and has no independent income, they may need an ITIN to file a joint tax return with a citizen or resident spouse.

Practical takeaway: Determine whether you have U.S. source income or file a joint return with a U.S. citizen or resident. If yes, you may need an ITIN to meet tax filing requirements.

Documents and Information Required for an ITIN

The IRS requires specific documentation to verify identity and establish residency before issuing an ITIN. The required documents fall into three categories: identity verification, residency verification, and income verification. Understanding what documents are accepted helps streamline the process.

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For identity verification, the IRS accepts a limited set of government-issued documents. Valid documents include a passport, national identification card, driver's license, military identification, or similar government documents from the person's country of origin. The document must include a photograph and be currently valid or have expired no more than a specified period before submission. Documents in a language other than English must be accompanied by a certified English translation.

Residency verification requires proof that the person is in the United States. Documents that may be used for residency include:

• A state driver's license or identification card
• A U.S. visa stamp in a passport
• An approved Form I-797 (USCIS immigration notice)
• A lease agreement or mortgage statement showing current U.S. residence
• Utility bills or bank statements with a U.S. address and recent date
• A school enrollment document showing current attendance at a U.S. institution

For income verification, the IRS requires documents showing U.S. source income. These may include W-2 forms from employers, 1099 forms for other income types, business records, bank statements showing income deposits, or employer letters documenting income and employment dates. The specific documents depend on the type of income being reported.

All documents must be originals or certified copies. Photocopies or uncertified documents are not accepted. Non-English documents require certified translations prepared by a qualified translator. The IRS provides a list of certified translators and translation requirements on its website.

Practical takeaway: Gather your government-issued ID with a valid photograph, proof of current U.S. residency, and documentation of U.S. source income before beginning the ITIN process. Organize these documents with English translations if needed.

How to Request an ITIN Through the IRS

The IRS offers multiple pathways for requesting an ITIN. The most common methods include filing by mail and visiting an IRS office in person. Each method has different timelines and requirements. Understanding your options helps determine which approach works for your situation.

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Mail submission is the most commonly used method. To request an ITIN by mail, individuals complete Form W-7, Application for IRS Individual Taxpayer Identification Number. This form is filed along with supporting documents and a tax return (if required). The IRS requests that applicants send original documents or certified copies, never photocopies. Processing times for mailed applications typically range from 4 to 6 weeks, though processing may take longer during peak tax season.

The mailing process involves these steps:

• Obtain Form W-7 from the IRS website or by mail
• Gather all required identity, residency, and income documents
• Complete Form W-7 with accurate personal information
• Include a copy of your tax return (Form 1040 or other applicable return)
• Mail the completed package to the IRS address specified on Form W-7 instructions
• Keep a copy of all submitted documents for your records

In-person appointments at IRS offices are another option. Certain IRS locations offer ITIN acceptance services where applicants can submit documents directly to an IRS representative. This method allows the IRS to review documents immediately for completeness, reducing the risk of delays. To schedule an appointment, contact the IRS directly at 1-800-829-1040 or visit the IRS website to find local office locations.

Some applicants may also work with certified acceptance agents (CAAs), which are organizations authorized by the IRS to accept ITIN applications and documentation. CAAs include tax preparation services, community organizations, and financial institutions. Using a CAA can provide convenience, though services may involve fees.

Practical takeaway: Choose a submission method based on your location and schedule. Mail submission is free but slower, while in-person submission at an IRS office provides faster processing and immediate document verification.

Understanding Processing Times and What Happens Next

After submitting an ITIN application, the IRS follows specific procedures to

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