{"id":636,"date":"2026-07-21T03:51:54","date_gmt":"2026-07-21T03:51:54","guid":{"rendered":"https:\/\/www.ingstart.com\/blog\/en\/?p=636"},"modified":"2026-08-05T09:37:22","modified_gmt":"2026-08-05T09:37:22","slug":"itin-number-guide","status":"publish","type":"post","link":"https:\/\/www.ingstart.com\/blog\/en\/itin-number-guide\/","title":{"rendered":"What Is an ITIN Number? A Complete Guide for Non-US Residents"},"content":{"rendered":"

What Is an ITIN<\/a> Number? A Complete Guide for Non-US Residents<\/b><\/p>\n

If you are a non-US resident who needs to file a US tax return, report US-source income, claim a permitted tax benefit, or complete certain tax-related transactions, you may need an ITIN number<\/b><\/span>.<\/p>\n

ITIN stands for Individual Taxpayer Identification Number<\/b><\/span>. It is issued by the Internal Revenue Service, commonly known as the IRS, to individuals who need a US taxpayer identification number for federal tax purposes but are not eligible for a Social Security Number.<\/p>\n

Although an ITIN looks similar to an SSN, the two numbers are not interchangeable. An ITIN does not provide work authorization, immigration status, or eligibility for Social Security benefits. Its primary purpose is to help individuals comply with US federal tax laws.<\/p>\n

This guide explains the difference between an ITIN and an SSN, who may need an ITIN number, how to apply, what documents are required, how long processing takes, and when an ITIN must be renewed.<\/p>\n

ITIN vs. SSN<\/a>: What Is the Difference?<\/b><\/span><\/h2>\n

The difference between an ITIN number<\/b><\/span> and a Social Security Number comes down to eligibility and purpose.<\/p>\n

A Social Security Number, or SSN, is issued by the Social Security Administration. It is generally available to US citizens and certain noncitizens who are authorized to work in the United States. Some noncitizens may also qualify for an SSN for a valid nonwork purpose.<\/p>\n

An ITIN, on the other hand, is issued by the IRS. It is intended for individuals who have a US federal tax purpose but do not have and are not eligible to receive an SSN.<\/p>\n

Here is a simple comparison:<\/p>\n

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An ITIN number always begins with the number 9 and follows the same general nine-digit format as an SSN.<\/p>\n

The most important rule is this: you should not apply for an ITIN if you are eligible for an SSN<\/b><\/span>. The Social Security Administration, rather than the IRS, determines whether you qualify for an SSN.<\/p>\n

What Is an Individual Taxpayer Identification Number?<\/b><\/span><\/h2>\n

An Individual Taxpayer Identification Number<\/b><\/span> is a nine-digit tax processing number issued by the IRS.<\/p>\n

It is available to certain individuals who need a US taxpayer identification number for federal tax purposes but cannot obtain a Social Security Number. This may include certain nonresident aliens, resident aliens, spouses, and dependents.<\/p>\n

An ITIN number is generally written in the following format:9XX-XX-XXXX<\/b><\/p>\n

The IRS created the ITIN program to allow individuals without SSNs to meet US tax reporting and filing requirements. The number helps the IRS identify the taxpayer, process returns, apply payments, and maintain the person\u2019s federal tax account.<\/p>\n

An ITIN should not be confused with an EIN.<\/p>\n

An Employer Identification Number<\/b><\/span>, or EIN, identifies a business entity for federal tax purposes. An ITIN identifies an individual. A foreign owner of a US company may therefore need an EIN for the company and, depending on the owner\u2019s personal tax obligations, an ITIN for the individual.<\/p>\n

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What Is an ITIN Number Used For?<\/b><\/span><\/h2>\n

An ITIN number is issued for federal tax purposes.<\/p>\n

Depending on the applicant\u2019s circumstances, an ITIN may be used to:<\/p>\n