The ITIN application is not complicated. The IRS documentation is written like it is, but the actual process has four steps: fill out a form, gather documents, pick how to submit, wait.
Most people who struggle with it made a mistake on the documents — sent a photocopy when the IRS requires originals, or mailed their passport and then needed it for something else three weeks later. This guide covers those problems before you hit them.
What Is an ITIN and Who Needs One
An ITIN (Individual Taxpayer Identification Number) is a 9-digit number the IRS issues to people who need to file US federal taxes but cannot get a Social Security Number. It always starts with 9.
You need an ITIN if you are in any of these situations:
- Nonresident alien required to file a US tax return
- Resident alien without SSN eligibility filing a return
- Dependent or spouse of a US citizen or resident alien
- Nonresident alien claiming a tax treaty benefit
- Someone with US-source income (rental property, investments, freelance) who needs to file
You do not need an ITIN if you are eligible for a Social Security Number. If you qualify for an SSN, apply for that first — the IRS will not issue you an ITIN if you can get an SSN.
Once you have an ITIN, it opens more than just tax filing. Many banks and credit card issuers now accept ITIN in place of an SSN for account applications. It’s the first document most immigrants need before they can start building a financial life in the US.
Form W-7 — The Application
The form is the W-7 (Application for IRS Individual Taxpayer Identification Number). Download it from irs.gov. It is two pages plus instructions.
The reason-for-applying boxes (line 1a–h) are where most people pause. Here is what applies to each common situation:
| Box | Who it’s for |
|---|---|
| b | Nonresident alien filing a US tax return |
| c | US resident alien filing a tax return (based on Substantial Presence Test) |
| d | Dependent of a US citizen or resident alien |
| e | Spouse of a US citizen or resident alien |
| f | Nonresident alien student, professor, or researcher filing or claiming an exception |
| g | Dependent or spouse of a nonresident alien visa holder |
| h | Other (includes ITIN for mortgage applications under certain conditions) |
F1 students with a scholarship or stipend: box f. Work visa holders (H1B, O1, L1) with income: usually box b or c depending on your residency status for tax purposes. Spouses on H4 with no income listed on a joint return: box e.
Documents You Need
The IRS requires two things: proof of identity and proof of foreign status.
A valid, unexpired passport is the only document that satisfies both requirements by itself. Everything else requires two documents.
| Document | Proves Identity | Proves Foreign Status |
|---|---|---|
| Passport | ✅ | ✅ |
| National ID card (with photo, name, DOB, expiry) | ✅ | ✅ (if foreign government issued) |
| US driver’s license | ✅ | ❌ |
| Foreign driver’s license | ✅ | ❌ |
| Civil birth certificate | ✅ | ❌ |
| Medical records (dependents under 6 only) | ✅ | ✅ |
| School records (dependents under 14 only) | ✅ | ✅ |
| Visa issued by US Department of State | ❌ | ✅ |
The full list is in the W-7 instructions, page 5.
No photocopies. The IRS will reject them. You need originals or copies certified by the issuing agency or a Certifying Acceptance Agent.
The passport problem
Mailing your original passport to the IRS means you are without it for up to 14 weeks during tax season. People miss international trips, visa appointments, and job offers because of this. If you cannot afford to be without your passport, use Option 2 or 3 below.
Three Ways to Submit Your Application
| Method | Keep your passport? | Cost | Processing time |
|---|---|---|---|
| Mail to IRS (Austin, TX) | ❌ | Free | 7–14 weeks |
| IRS Taxpayer Assistance Center | ✅ | Free | 7–11 weeks after visit |
| Certifying Acceptance Agent (CAA) | ✅ | $100–$250 | 7–11 weeks after submission |
Option 1: Mail to the IRS
Send your completed W-7, your attached tax return (required in most cases), and your original documents to:
Internal Revenue Service
ITIN Operation
PO Box 149342
Austin, TX 78714-9342
Use certified mail with USPS tracking. The IRS does not have a reliable confirmation system, and “I mailed it” is not something they can verify on their end.
The IRS returns your original documents by mail after processing. During peak season (January–April), budget 11–14 weeks, not 7.
Option 2: IRS Taxpayer Assistance Center (TAC)
You bring your originals to the IRS office, they verify on the spot, and you walk out with your documents. Your passport never leaves your hands.
Appointments are required. Book one at irs.gov. Not all TAC locations handle ITIN applications — confirm when you book.
After the appointment, the IRS still takes 7–11 weeks to issue the number and mail it to you.
Option 3: Certifying Acceptance Agent (CAA)
A CAA is an IRS-authorized individual — typically a CPA, enrolled agent, or immigration attorney — who can review your originals, make certified copies, and submit the W-7 package on your behalf. You never send anything to Austin yourself.
Find a CAA near you using the IRS directory. Many CAAs now work remotely via video call.
Fee: $100–$250 depending on the agent. Some include tax return preparation in the same package.
Step-by-Step: The Complete Process
- Download the current W-7 from irs.gov. Do not pay any website for this form. It is free.
- Read pages 1–4 of the W-7 instructions — specifically the section on “Exceptions to the Tax Return Filing Requirement” if you think you might qualify.
- Complete the W-7. Legal name exactly as it appears on your passport. Date and country of birth. Check the appropriate box for your reason. Sign and date.
- Prepare your federal tax return. Attach the actual 1040 or 1040-NR. Write “Applied For” in the SSN/ITIN field on the return. Do not submit the return separately — send it with the W-7.
- Gather your documents. Passport is the easiest path. Make sure it is not expired. If it expires within six months, renew it before applying.
- Choose your submission method. If you need your passport available: TAC appointment or CAA. If you can spare it: mail.
- Submit. Mail with certified tracking, visit the TAC, or deliver to your CAA.
- Wait, then follow up if needed. The IRS mails your ITIN to the address on your W-7. If 11 weeks pass with no letter, call 1-800-829-1040. You will need your full name, date of birth, mailing address, and the date you submitted.
Common Mistakes That Get Applications Rejected
Wrong box checked on the W-7. H4 visa holders frequently check the wrong box. Read the descriptions carefully or ask a CAA.
Name doesn’t match the passport exactly. The IRS matches your W-7 name to your identity document character by character. If your passport says “María” and you write “Maria,” it will be rejected.
Sending a photocopy. The single most common rejection reason. Originals only, or CAA-certified copies.
Submitting without the tax return. Most W-7 applicants must attach their tax return. If you leave it out thinking it’s optional, the application comes back.
Applying with an expired ITIN. If you had an ITIN before, check whether it’s still valid first. Applying for a new ITIN when you already have one causes delays. Use the renewal process instead.
Re-submitting while waiting. If you applied and haven’t heard back in 8 weeks, the instinct is to apply again. Don’t. Duplicate applications make everything slower.
ITIN Expiration — Check Before You Apply
ITINs expire if not used on a federal tax return for three consecutive years. They also expire on a rolling schedule based on the middle two digits of your number.
Check the IRS ITIN expiration schedule before assuming your old ITIN works. If yours is expired, use the same W-7 form and check “Renewal” at the top.
What You Can Do With an ITIN Once You Have It
- File federal and state tax returns
- Apply for credit cards at issuers that accept ITIN — Best Credit Cards That Accept ITIN Numbers in 2026
- Open bank accounts at institutions that accept ITIN — Best Banks for Immigrants in the USA
- Start building US credit history — the bureaus track you by name, address, and date of birth
- Apply for mortgages at ITIN-accepting lenders
Getting an ITIN is step one. The next step is using it to open accounts and start building credit. The first card you get matters — a secured card that reports to all three bureaus is the fastest path. See Secured Credit Card With ITIN — How It Works.
Frequently Asked Questions
How much does it cost to get an ITIN?
Filing directly with the IRS is free. No government fee. If you use a CAA, expect $100–$250 for their service.
Can I apply for an ITIN without filing a tax return?
Usually no. The W-7 requires an attached federal tax return in most cases. There are exceptions — for dependents, some nonresident aliens claiming tax treaty benefits, and a few other situations listed in the W-7 instructions under “Exceptions.”
How long does an ITIN stay valid?
It stays active as long as you use it on a federal return at least once in any three-year period. Three consecutive years without filing makes it inactive. Renew it with the same W-7 process.
Can I use an ITIN for employment?
No. Employers use SSNs for payroll and Form I-9. An ITIN is for tax identification only.
Does applying for an ITIN affect my immigration case?
No. The IRS does not share ITIN information with USCIS or immigration enforcement. Under 26 USC 6103, tax return information is confidential. Many visa holders are legally required to file taxes — having an ITIN and filing a return is generally viewed favorably for future immigration applications.
What happens if my application is rejected?
The IRS sends a letter explaining why. Fix the issue and resubmit. No additional fee. Most common reasons: wrong box checked, name mismatch, missing documents, or no tax return attached.
If I later qualify for an SSN, do I keep my ITIN?
No. Once you have an SSN, you stop using the ITIN. Notify the IRS so they can link your tax records. Your credit history stays intact — the bureaus record history by name and date of birth, so it carries over automatically.
How does an ITIN compare to an SSN for credit building?
For credit-building purposes, both work the same way. The bureaus build your file based on your name, date of birth, and address. An ITIN holder can build a full FICO score in the same timeframe as an SSN holder, starting with a secured card that reports to all three bureaus.
The EducaDinero editorial team specializes in personal finance for Latino immigrants in the USA. Our content is reviewed against official sources including the IRS, CFPB, and federal financial regulators. We cover credit building, ITIN banking, and financial products for immigrants — topics we have researched across hundreds of hours of interviews with immigrants, bank representatives, and certified financial counselors. We do not accept payment for product placement. Our recommendations are based on research and publicly available product terms.