A Comprehensive Guide to Obtaining an ITIN Number from the IRS

What Is an ITIN Number?

An Individual Taxpayer Identification Number (ITIN) is a nine-digit number issued by the Internal Revenue Service (IRS) for individuals who need a U.S. taxpayer identification number but are not eligible for a Social Security Number (SSN).

The main purpose of an ITIN is to help people file their U.S. tax returns, report income, and stay compliant with federal tax laws—even if they are not U.S. citizens or permanent residents. In short, an ITIN allows non-residents, foreign nationals, and their dependents to legally meet their tax obligations in the United States.

People who typically need an ITIN include:

• Non-resident aliens earning U.S. income

• Foreign investors or business owners

• International students and their dependents who cannot obtain an SSN

Having an ITIN ensures that income earned in the U.S.—such as wages, rental income, or investment income—is properly reported. It can also help you avoid tax penalties and maintain a clean record with the IRS, which can be beneficial for future immigration or financial matters.

In short, an ITIN is not just a number—it’s a critical part of staying compliant with U.S. tax laws if you are not eligible for an SSN.

Who Is Eligible for an ITIN?

To get an ITIN, you must meet certain IRS eligibility requirements. This identification number is meant for individuals who:

• Are not eligible for an SSN, and

• Need a taxpayer identification number to file U.S. taxes or claim tax benefits.

You do not have to live in the U.S. to qualify. Many foreign nationals, non-resident aliens, and dependents of U.S. citizens or residents apply for an ITIN each year to meet their tax obligations.

Examples of people who may need an ITIN:

• Non-resident aliens earning money from U.S. sources

• Individuals doing business in the U.S.

• Foreign students with scholarships or stipends

• Spouses or dependents of U.S. citizens or residents living abroad

When applying, you’ll need to show why you need an ITIN and provide proof of your foreign status and identity. Common documents include a passport, national ID card, or foreign driver’s license.

You’ll also need to complete IRS Form W-7—the official application form for an ITIN. Supporting documentation must be original or certified copies issued by the government. Submitting the correct documents ensures a smooth application process.

How to Get an ITIN Number — Step-by-Step

Wondering how to get an ITIN number? The process is simple if you follow the correct steps:

1. Complete IRS Form W-7
   Download it directly from the IRS website or pick it up from an authorized tax professional. Fill out all sections carefully with your legal name, address, and citizenship information.

2. Gather Your Supporting Documents
   You must provide proof of both identity and foreign status. The passport is the most commonly accepted document. You may also use national ID cards or other official records. Remember: only originals or certified copies are accepted by the IRS—no regular photocopies.

3. Submit Your Application
   You can send your Form W-7 and documents by mail to the address listed in the instructions, or work with an IRS-authorized Certifying Acceptance Agent (CAA) who can verify your documents and submit them for you.

   (If you need help, AM Tax Inc. can handle your ITIN application from start to finish—see our ITIN pricing here.)

4. Avoid Common Mistakes
   Missing signatures, incorrect information, or incomplete documentation are the most common reasons for ITIN delays. Double-check everything before submission.

Once approved, the IRS will mail your new ITIN number directly to you. You can then use it to file your tax return or meet other IRS requirements.

After You Receive Your ITIN

Once you get your ITIN, it’s important to use it correctly and keep it active. Your ITIN will appear on your federal tax returns, forms, and any correspondence with the IRS. Always keep a secure copy of your ITIN letter and past tax filings.

Keep Your ITIN Active

Your ITIN may expire if it’s not used on a federal tax return for three consecutive years. If it expires, you’ll need to renew your ITIN before filing again.

Update Your Information

If you move or change your name, notify the IRS to ensure you receive all mail and notices related to your ITIN.

Use It for Tax Compliance

Your ITIN helps you file accurately, claim eligible credits (like the Child Tax Credit or education benefits), and avoid penalties for non-compliance.

Need Professional Help?

At AM Tax Inc., we make the ITIN process quick and stress-free. Whether you’re a foreign investor, business owner, or dependent needing to file taxes in the U.S., we’ll handle your ITIN application from start to finish—securely and efficiently.

👉 View our ITIN pricing and get started today