What Is an ITIN and Who Needs One?
An Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the IRS for people who need to file US taxes but aren't eligible for a Social Security Number. This includes undocumented immigrants, dependents of visa holders, foreign investors in US property, and non-resident aliens with US income.
But here's the important part most people miss: an ITIN is also your gateway to building US credit. Credit bureaus accept ITINs as identifiers, meaning you can build a credit score without an SSN.
Step 1: Gather Your Documents
You need Form W-7 (available on irs.gov) and one of these document combinations:
Option A: Valid, unexpired passport (this alone is sufficient — it's the easiest route).
Option B: Two or more of the following: national ID card, US state ID, foreign voter registration card, US or foreign military ID, US visa, foreign driver's license, US civil birth certificate, medical records (for dependents under 18).
The passport-only route is by far the simplest. If you have a valid passport, that's all you need.
Step 2: Complete Form W-7
Form W-7 is the ITIN application. Key sections:
Box 1a-1b: Your legal name exactly as it appears on your passport. Box 2: Your mailing address in the US (this is where your ITIN letter will be sent). Box 3: Your foreign address (if applicable). Box 6a-6b: Your country of citizenship and your foreign tax ID number. Reason for applying: Check the appropriate box. Most people check box (a) for 'Nonresident alien required to file a US tax return' or box (h) for 'Other.'
Important: You typically need to attach a federal tax return (Form 1040 or 1040-NR) with your W-7 unless you qualify for an exception.
Step 3: Submit Your Application
You have three options:
1. Mail it to the IRS (cheapest but slowest — 7-11 weeks processing). Send to: Internal Revenue Service, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342.
2. Visit an IRS Taxpayer Assistance Center in person. They verify your documents on the spot so you don't have to mail originals. Find locations at irs.gov.
3. Use a Certifying Acceptance Agent (CAA). These are IRS-authorized professionals who verify your documents and submit on your behalf. Costs $50-200 but saves hassle.
Step 4: Use Your ITIN to Build Credit
Once you have your ITIN (arrives in 7-11 weeks by mail), you can:
1. Open financial accounts that report to credit bureaus. Plu accepts ITINs and reports to all three major bureaus. 2. Apply for secured credit cards at banks that accept ITINs. 3. Start building credit history immediately — every month of reported activity counts.
After 6 months of consistent activity, you should have a credit score. This unlocks apartment rentals, phone plans, auto loans, and eventually traditional credit cards.
Common Mistakes to Avoid
Don't send original documents by mail unless absolutely necessary — use certified copies or visit in person. Don't forget to include a tax return with your W-7 (unless you qualify for an exception). Don't wait — ITINs take 7-11 weeks to process, so apply as soon as possible. Don't confuse ITIN with SSN — an ITIN doesn't authorize work, but it does authorize tax filing and credit building.
Frequently asked questions
How long does ITIN approval typically take? 7-11 weeks if you mail Form W-7 with your tax return to the IRS. Using a Certifying Acceptance Agent can verify documents in person and speed processing.
Can I open a bank account or get a card with just an ITIN? Some US banks accept ITIN holders, but acceptance varies. Plu uses passport-based KYC so you can get a Visa card and start spending before your ITIN comes through.
Does an ITIN expire? ITINs expire if not used on a federal tax return for three consecutive years. The IRS announces specific expiration cycles each year — keep filing or renew with Form W-7.