Learn About Getting an ITIN Number

Understanding What an ITIN Number Is

An Individual Taxpayer Identification Number, or ITIN, is a nine-digit number issued by the Internal Revenue Service (IRS). The IRS created this number in 1996 to identify people for tax purposes who don't have a Social Security number. The number follows the same format as a Social Security number: XXX-XX-XXXX.

The IRS assigns ITINs to individuals who need to file tax returns or report other tax information to the U.S. government but are not authorized to work in the United States. This includes certain nonresident aliens, resident aliens, dependents, and spouses. Unlike a Social Security number, an ITIN does not provide work authorization or any legal immigration status. It is strictly a tax identification tool.

According to IRS data, as of 2023, more than 16 million ITINs have been issued since the program began. This shows that a significant number of people rely on this number for their tax obligations. An ITIN remains valid throughout a person's lifetime, though it can become inactive if not used on a federal tax return for three consecutive years.

People often confuse an ITIN with other forms of identification or legal status. It is important to understand that having an ITIN does not mean someone has permission to work in the United States, does not change immigration status, and does not make someone a U.S. citizen or permanent resident. The number serves one main purpose: allowing the IRS to track tax obligations.

Practical Takeaway: Before exploring an ITIN further, confirm that you understand the number is only for tax purposes. If you are unsure whether you need one, review the categories of people the IRS recognizes as ITIN holders.

Who Might Need an ITIN Number

The IRS recognizes several groups of people who may need an ITIN. The largest group consists of nonresident aliens who have U.S. tax obligations. This includes foreign nationals living outside the United States who earn income from U.S. sources, such as rental income from U.S. property, investment income, or self-employment income.

Resident aliens who are not yet U.S. citizens may also need an ITIN for certain tax purposes, depending on their immigration status and tax situation. Additionally, spouses of U.S. citizens or residents may need an ITIN to file joint tax returns. Dependents of U.S. citizens or residents who don't have Social Security numbers may need ITINs as well.

Some visa holders also require ITINs. This can include students on F-1, J-1, or M-1 visas who have reporting requirements to the IRS. People on other temporary visas, such as H-1B or L-1 visas, may need ITINs if they don't have Social Security numbers. Certain visa categories for investors, workers, and trainees may also require ITINs.

Nonresident aliens who file tax returns to claim refunds must have an ITIN. This is common for foreign workers who had taxes withheld from their paychecks but have no other U.S. tax obligation. They use the ITIN to file a return and claim back the taxes that were taken out.

Family members and dependents of foreign nationals who are in the U.S. temporarily may also need ITINs. For example, spouses and children of workers on temporary visas often need ITINs to be claimed as dependents or to file their own tax returns.

Practical Takeaway: Review the IRS list of ITIN categories to determine if your situation matches one of these groups. Write down which category applies to you, as you will need this information during the process of requesting an ITIN.

How the ITIN Request Process Works

The process of requesting an ITIN involves submitting Form W-7 to the IRS. This form is called the "Application for IRS Individual Taxpayer Identification Number." The form asks for personal information such as name, date of birth, current address, and country of citizenship. It also asks why you are requesting an ITIN.

You must submit Form W-7 along with supporting documents that prove your identity and immigration status. These documents may include a passport, visa, or other government-issued identification from your country. The IRS has specific rules about which documents they will accept. Not all documents qualify, and photocopies must meet IRS standards.

There are several ways to submit Form W-7 to the IRS. One method is mailing the form and documents directly to the IRS address listed on the form. Processing times for mailed applications typically range from 10 to 21 days, though times may vary depending on how busy the IRS is.

Another option is to work with an IRS-certified acceptance agent. These are organizations like tax preparation firms, community organizations, and libraries that are trained and authorized by the IRS to help people submit ITIN requests in person. Working with an acceptance agent can speed up the process. Some acceptance agents can process applications on the spot and return your ITIN number within a few days.

A third option involves going to an IRS office in person. You can bring your Form W-7 and documents to an IRS Taxpayer Assistance Center. Staff can review your documents and submit your application for you. You can find the nearest IRS office location on the official IRS website.

Practical Takeaway: Gather all your identity documents before starting the ITIN request process. Make copies that meet IRS standards: they should be clear, on white paper, and show all four edges of the original document. Decide which submission method works best for your situation—mail, acceptance agent, or IRS office visit.

Documents and Requirements You'll Need

The IRS requires specific documents to process an ITIN request. The most commonly accepted form of identity is a valid passport from any country. A passport must be current or expired for no more than a certain period, depending on your country's rules. The IRS will make a photocopy of your passport as part of the process.

Other identity documents that may be accepted include national identification cards, visas, travel documents, and birth certificates. However, not all countries' documents are recognized by the IRS. Some documents must be certified copies, meaning they are officially stamped or verified. Original documents are sometimes required as well.

Along with identity documents, you must show proof of your immigration status or visa status in the United States. This might be your visa stamp, a Form I-94 arrival/departure record, an employment authorization document, a green card, or other immigration paperwork. The exact document depends on your immigration category.

You must also show a reason for needing an ITIN. This means providing documents that prove you have a U.S. tax obligation. Examples include a letter from your employer, a mortgage statement showing U.S. property, investment statements, or rental income documentation. Students must provide a letter from their school on school letterhead.

All documents must be in English or accompanied by an official English translation. Many countries' institutions can provide certified translations. If you are submitting documents by mail, photocopies must be clear and readable. The IRS accepts both color and black-and-white copies, but both sides of any two-sided document must be copied.

The IRS updates its list of accepted documents regularly. Before submitting your application, check the most recent version of Form W-7 instructions on the official IRS website to confirm that your specific documents will be accepted. Document requirements can change, and what was accepted last year might not be accepted this year.

Practical Takeaway: Create a checklist of documents using the current Form W-7 instructions. For each document you plan to submit, verify it meets IRS standards. If you need documents translated, start that process early, as translations can take several weeks.

Timeline and What to Expect During Processing

The time it takes to receive an ITIN varies depending on how you submit your request and how busy the IRS is during that period. If you mail your Form W-7 and documents to the IRS, processing typically takes 10 to 21 days. During busy tax season (January through April), processing may take longer. Some applications may take up to 30 days or more.

If you work with an IRS-certified acceptance agent, the process is often faster. Many acceptance