If you don't have a Social Security Number (SSN) but earn income in the United States — or need to file a tax return — you'll need an ITIN. In this guide, we explain exactly who needs it, which documents you must present, how to complete Form W-7, and the fastest way to get it approved in 2026.
What is an ITIN?
An ITIN (Individual Taxpayer Identification Number) is a nine-digit tax processing number issued by the IRS in the format 9XX-XX-XXXX. It is exclusively for individuals who need to comply with U.S. tax laws but are not eligible for a Social Security Number.
The ITIN does not authorize you to work in the United States, does not change your immigration status, and does not make you eligible for Social Security benefits. Its sole purpose is to allow you to fulfill your federal tax obligations with the IRS.
Key fact:
Having an ITIN and filing taxes each year builds a tax compliance history that can be very helpful in future immigration processes, including green card applications and citizenship petitions.
Who Needs an ITIN?
You need an ITIN if you fall into one of these categories:
- Foreign nationals (non-residents) who earn U.S.-sourced income (rentals, investments, business income)
- Undocumented immigrants who are required to file a U.S. tax return
- Spouses and dependents of U.S. citizens or legal residents who are not eligible for an SSN
- Foreign students, professors, or researchers with U.S. income outside of their scholarship or fellowship
- Non-resident aliens claiming a tax treaty benefit
- Foreign investors in U.S. real estate (required for FIRPTA withholding claims)
You do NOT need an ITIN if you are eligible for a Social Security Number — even if you haven't applied for one yet. If you qualify for an SSN, the IRS will not issue you an ITIN.
Documents Required to Apply for an ITIN
The IRS requires documentation that proves your foreign status and identity. The single document that satisfies both requirements is a valid passport — this is the most straightforward option.
If you don't have a passport, you can combine two documents from this list:
| Document | Proves Identity | Proves Foreign Status |
|---|---|---|
| Passport (any country) | ✅ | ✅ |
| National identity card | ✅ | ✅ |
| U.S. or foreign driver's license | ✅ | — |
| Birth certificate (under 18) | ✅ | — |
| Foreign voter registration card | ✅ | ✅ |
| U.S. Citizenship and Immigration Services photo ID | ✅ | ✅ |
| Visa issued by the U.S. Department of State | — | ✅ |
| Medical records (minors under 6 only) | ✅ | — |
| School records (minors under 18 only) | ✅ | — |
⚠️ Important note about originals:
The IRS requires original documents or certified copies issued by the issuing authority. Notarized photocopies are generally not accepted. Using a Certified Acceptance Agent (CAA) — like Hispanic Financial — allows you to submit certified copies without sending originals to the IRS.
Step-by-Step: How to Apply for Your ITIN in 2026
Complete Form W-7
Download Form W-7 (Application for IRS Individual Taxpayer Identification Number) from irs.gov. Fill it out carefully, selecting the correct reason for applying (Box a through h). The most common for immigrants is Box "a" (non-resident alien required to file a U.S. tax return) or Box "e" (spouse or dependent of a U.S. citizen/resident).
Prepare your federal tax return
In most cases, Form W-7 must be submitted together with a completed federal tax return (Form 1040 or 1040-NR). There are some exceptions — such as foreign investors claiming treaty benefits or FIRPTA cases — where a return is not required. Write "ITIN APPLICATION ENCLOSED" at the top of your return.
Gather your identity documents
Collect the original documents or certified copies that prove your identity and foreign status. The passport is the simplest option. If using a Certified Acceptance Agent (CAA), they can certify copies of your documents so you don't have to mail originals to the IRS.
Choose how to submit your application
You have three options: (A) Mail everything to the IRS ITIN Operations Center in Austin, TX — risky because you send original documents. (B) Visit an IRS Taxpayer Assistance Center (TAC) in person — by appointment only. (C) Use a Certified Acceptance Agent (CAA) — the fastest and safest option. We are a CAA at Hispanic Financial.
Wait for processing
The IRS typically processes ITIN applications in 6–11 weeks. During peak season (January–April), times can be closer to 11 weeks. Once approved, the IRS will mail your ITIN letter (CP565) to the address on your W-7. Your ITIN begins with the digit 9.
ITIN Processing Times in 2026
| Submission Method | Estimated Processing Time |
|---|---|
| By mail (off-peak: May–December) | 6–8 weeks |
| By mail (peak season: January–April) | 9–11 weeks |
| In-person at IRS TAC | 6–8 weeks (same timeline, but documents returned same day) |
| Through a Certified Acceptance Agent (CAA) | 6–8 weeks (safest — no originals mailed) |
Tip: Apply as early as possible. If you file your ITIN application with your tax return and your ITIN is approved after the April 15 deadline, the IRS will consider your return timely filed.
Does Your ITIN Need to Be Renewed?
ITINs expire if they haven't been used on a federal tax return for three consecutive years. Additionally, the IRS has been systematically expiring ITINs with certain middle digit combinations.
In 2026, ITINs with middle digits 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 90, 91, 92, 94, 95, 96, 97, 98, or 99 need to be renewed if you plan to use them this tax season.
How to check if your ITIN is still valid:
Look at digits 4 and 5 of your ITIN (the "middle digits" in the format 9XX-XX-XXXX). If they match any of the numbers listed above, submit a renewal W-7 with your 2026 tax return. Renewal uses the same Form W-7 — just check the "Renewal" box.
5 Common ITIN Application Mistakes to Avoid
Mistake 1: Sending unacceptable copies of documents
Simple photocopies — even notarized ones — are often rejected. The IRS requires originals or copies certified by the issuing authority (the embassy, consulate, or government agency that issued the document). A CAA can certify copies and save you this headache.
Mistake 2: Not attaching a tax return to Form W-7
Unless you qualify for a specific exception, the IRS will reject a standalone W-7. You must file your tax return and W-7 together. If you owe taxes, filing with a W-7 and paying on time avoids penalties even if the ITIN is approved later.
Mistake 3: Selecting the wrong reason code on W-7
Form W-7 has boxes "a" through "h" for the reason you need an ITIN. Selecting the wrong box is a common reason for rejection. For example, Box "a" is for non-residents who must file, while Box "h" covers other specific cases including FIRPTA and treaty claims.
Mistake 4: Applying when you're eligible for an SSN
If you have work authorization (current or expired), the IRS may require you to apply for an SSN instead. The IRS does not issue ITINs to people who qualify for SSNs. Applying incorrectly wastes weeks.
Mistake 5: Not renewing an expired ITIN before filing
Using an expired ITIN on your tax return means the IRS will process it without applying any credits or deductions that require a valid ITIN — including the Child Tax Credit. This can significantly reduce your refund or increase your tax bill.
What is a Certified Acceptance Agent (CAA)?
A Certified Acceptance Agent (CAA) is an individual or entity authorized by the IRS to assist with ITIN applications. CAAs can:
- Review your original documents and certify copies — so you never have to mail your passport or national ID to the IRS
- Complete and review Form W-7 on your behalf, ensuring it's filled out correctly
- Prepare and file your tax return alongside your ITIN application
- Communicate with the IRS on your behalf if there are questions or delays
- Handle ITIN renewals for previously issued numbers
At Hispanic Financial, we are a Certified Acceptance Agent. We prepare your entire ITIN application — including your tax return — in English or Spanish, and we certify your documents so you can keep your originals.
Related Services
Need help applying for your ITIN?
As a Certified Acceptance Agent, we handle your entire ITIN application — Form W-7, your tax return, and document certification — all in Spanish or English. No need to mail your passport to the IRS. Serving Coral Springs and all of South Florida.
This article is for informational purposes only and does not constitute legal or tax advice. IRS procedures and processing times may change; consult a qualified professional for advice specific to your situation.