ITIN: A Comprehensive Guide Individual Taxpayer Identification Number (ITIN) is a nine-digit [tax processing number](https://itintoday.com/) issued by the Internal Revenue Service (IRS) to individuals who are required to have a U.S. taxpayer identification number but are not eligible for a Social Security number (SSN). ![](https://i.imgur.com/J9xppgR.jpg) **Who Needs an ITIN? ** Individuals who are not eligible for an SSN but have a requirement to file a U.S. federal tax return or are listed as a spouse or dependent on a U.S. tax return, need an ITIN. This includes: Non-resident aliens who receive income from U.S. sources. Foreign nationals who are not authorized to work in the U.S. but have a tax filing requirement. Spouses or dependents of U.S. citizens or residents who do not have an SSN. U.S. residents who are not eligible for an SSN but have a tax filing requirement, such as non-citizens who have been granted a work permit. How to Apply for an ITIN? To apply for an ITIN, you need to complete Form W-7, Application for IRS Individual Taxpayer Identification Number, and submit it along with a valid federal tax return and the required identification documents. The identification documents must show your name, date of birth, and foreign status. **Benefits of Having an ITIN** Having an ITIN can provide various benefits, including: Filing a tax return: With an ITIN, you can file a U.S. federal tax return and claim a refund, if eligible. Opening a bank account: You can use an ITIN to open a bank account in the U.S. Obtaining a loan: You can use an ITIN to apply for a loan or credit card in the U.S. Starting a business: You can use an ITIN to start a business in the U.S. Applying for a driver’s license: Some states accept ITINs as a valid form of identification to apply for a driver’s license. Conclusion ITIN is a tax processing number issued by the IRS to individuals who are not eligible for an SSN but have a requirement to file a U.S. federal tax return. Applying for an ITIN involves completing Form W-7 and submitting it along with the required identification documents. Having an ITIN can provide various benefits, including filing a tax return, opening a bank account, obtaining a loan, starting a business, and applying for a driver’s license.