What is Form W-7 and where do I get it?

Form W-7 is the IRS Application for Individual Taxpayer Identification Number. Download it free from irs.gov/forms-pubs or request a paper copy by calling 1-800-TAX-FORM (1-800-829-3676). The form is 2 pages with 6 sections. You must complete all required fields, sign the form, and attach supporting documents. The form is available in English and Spanish.

Can I apply for an ITIN online in 2026?

You cannot submit Form W-7 electronically to the IRS. However, you can prepare your application online through services like itin.so, which review your documents and prepare your W-7 form. The final submission must be mailed to the IRS Austin Processing Center or submitted in person at a Taxpayer Assistance Center (TAC) or through a Certifying Acceptance Agent.

Do I need to send my original passport with the ITIN application?

If you mail your application directly to the IRS, yes, you must send original documents or certified copies from the issuing agency. The IRS returns originals within 60 days. To avoid sending your passport, use a Certifying Acceptance Agent (CAA) who can verify your documents in person and send certified copies instead. This is the safest option.

What happens if my ITIN application is rejected?

The IRS sends a rejection notice (CP567) explaining the reason. Common reasons include incomplete W-7, insufficient documentation, or missing tax return. You have 45 days to respond with corrected information. If rejected, you can reapply immediately with the correct documents. There is no limit on how many times you can apply. See our guide on ITIN application rejected for detailed next steps.

Can I apply for an ITIN for my child or dependent?

Yes. Parents or guardians can apply for ITINs for dependents who do not qualify for an SSN. You need the child's passport or birth certificate plus a school record, medical record, or visa showing US connection. The parent signs the W-7 on behalf of children under 18. Each dependent needs a separate W-7 form attached to the same tax return.

How much does it cost to apply for an ITIN?

Filing Form W-7 directly with the IRS is free. However, most applicants use professional services to avoid mistakes and protect their passport. Certifying Acceptance Agents charge $50 to $275. Online services like itin.so charge $297 for standard processing or $297 for express processing. Tax preparers who assist with ITIN applications charge $150 to $400 depending on complexity.

Do I need to file a tax return with my ITIN application?

In most cases, yes. Form W-7 must be attached to a valid federal tax return (Form 1040, 1040-NR, or 1040-SR). There are 5 exception categories that allow you to apply without a tax return, including treaty benefits, third-party withholding reporting, and mortgage interest deductions. See our ITIN without tax return guide for the complete list of exceptions.

What is a Certifying Acceptance Agent and should I use one?

A Certifying Acceptance Agent (CAA) is an individual or business authorized by the IRS to verify identity documents for ITIN applicants. Using a CAA means you do not need to mail your original passport to the IRS. CAAs charge $50 to $275. The IRS maintains a list of authorized CAAs at irs.gov. Using a CAA is recommended for anyone who cannot risk being without their passport for 60+ days.

Can I check my ITIN application status?

Yes. Call the IRS ITIN hotline at 1-800-829-1040 after 7 weeks from your submission date. Have your W-7 submission date, name, and mailing address ready. The IRS does not offer online status tracking for ITIN applications. If you applied through a CAA or service like itin.so, they may provide status updates. See our guide on how to check ITIN status for more details.

ITIN Application Step by Step 2026: 7-Step Process

Updated April 2026

Direct answer: The ITIN application requires 7 steps: determine eligibility, gather documents, complete Form W-7, prepare your tax return, choose a submission method, submit to the IRS, and wait 7 to 11 weeks for processing. Below: every step explained with exact documents, timelines, costs, and tips to avoid rejection.

Step 1: How Do You Determine If You Need an ITIN?

You need an ITIN if you have a US tax filing obligation or need a US taxpayer identification number but are not eligible for a Social Security Number (SSN). This includes non-resident aliens filing US tax returns, dependents or spouses of US citizens or resident aliens, and non-residents receiving US-source income subject to reporting or withholding. If you already have an SSN, you do not need an ITIN. If you previously had an ITIN that expired, you need to renew your ITIN rather than apply for a new one. Check our renewal vs new application guide to confirm which process applies to you.

Step 2: What Documents Do You Need for the ITIN Application?

The IRS accepts 13 types of identification documents for ITIN applications. A valid, unexpired passport is the only standalone document that proves both identity and foreign status. If you do not have a passport, you need a combination of 2 documents: one for identity and one for foreign status. Accepted documents include national identification cards, US or foreign driver's licenses, birth certificates, foreign voter registration cards, US visa, US military identification, foreign military identification, civil birth certificates, medical records (dependents under 6), school records (dependents under 18 or students under 25), and US Citizenship and Immigration Services (USCIS) photo identification. See our complete list of accepted ITIN documents for full details on each document type.

Step 3: How Do You Complete Form W-7?

Form W-7 has 6 sections. Section 1 asks for your reason for applying (check box a for most first-time applicants). Section 2 collects your name exactly as it appears on your identification documents. Section 3 asks for your mailing address and physical address. Section 4 collects other identifying information including date of birth, country of citizenship, foreign tax ID number, and US visa number. Section 5 is for applicants who previously had an ITIN or applied before. Section 6 is your signature and date. Common mistakes that cause rejection: name mismatch between W-7 and tax return, missing foreign address, checking the wrong reason box, and forgetting to sign. Read our ITIN application mistakes guide to avoid these errors.

Step 4: How Do You Prepare the Tax Return?

Most ITIN applicants must attach a federal tax return to Form W-7. Non-resident aliens file Form 1040-NR. Resident aliens and those filing jointly with a US citizen file Form 1040 or 1040-SR. Write "ITIN TO BE REQUESTED" in the SSN field on the tax return. If you are applying for ITINs for multiple family members, attach all W-7 forms to a single tax return. The tax return does not need to show tax owed. You can file for a refund with your ITIN application. If you qualify for an exception to the tax return requirement, you must include the appropriate documentation proving your exception category instead.

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Step 5: What Are the 3 Ways to Submit Your ITIN Application?

There are 3 submission methods. Method 1: Mail your W-7, tax return, and original documents to the IRS ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342. Method 2: Visit an IRS Taxpayer Assistance Center (TAC) in person. Call 1-844-545-5640 to schedule an appointment. Method 3: Use a Certifying Acceptance Agent (CAA) who verifies your documents and submits certified copies. The CAA method is the safest because you keep your original passport. The IRS maintains a directory of authorized CAAs on irs.gov. The mail method is the slowest (11 to 14 weeks) and requires sending original documents.

Step 6: What Happens After You Submit Your ITIN Application?

After the IRS receives your application, they verify your identity documents, validate your W-7 information, and process your tax return. If everything is correct, the IRS assigns a 9-digit ITIN starting with the number 9 and mails you a CP565 notice with your ITIN. If the IRS needs additional information, they send a CP566 notice requesting clarification. You have 45 days to respond to a CP566. The IRS does not email or call applicants about ITIN status. All communication comes by US mail to the address on your W-7. Learn more about ITIN processing times in 2026.

Step 7: How Do You Track and Receive Your ITIN?

After 7 weeks from submission, call the IRS at 1-800-829-1040 to check your application status. The IRS phone lines are open Monday through Friday, 7 AM to 7 PM local time. When your ITIN is assigned, you receive a CP565 notice by mail. Keep this letter in a safe place. You will need it to open bank accounts, file future tax returns, and prove your ITIN to third parties. If you lose your CP565, see our guide on replacing your ITIN letter. Your ITIN does not expire as long as you use it on a federal tax return at least once every 3 years.

What Is the Complete ITIN Application Timeline?

Here is the full timeline from start to finish. Document gathering takes 1 to 5 days depending on what you already have. W-7 preparation takes 1 to 2 days if doing it yourself, or 2 to 10 business days through a service. Submission takes 1 day for in-person or CAA, or 3 to 7 days for mail delivery. IRS processing takes 7 to 11 weeks off-season or 9 to 14 weeks during tax season. CP565 delivery takes 1 to 2 weeks by mail. Total end-to-end: 9 to 18 weeks depending on the method and time of year. Check our processing time by month breakdown for the best time to apply.

Government Sources

IRS Form W-7 instructions (Rev. 2025). IRS Publication 1915 (Understanding Your IRS Individual Taxpayer Identification Number). Processing times from IRS Operations data as of April 2026. Document requirements per IRS ITIN application guidelines. All information verified against irs.gov official publications.

ITIN Application Process: Frequently Asked Questions

The IRS processes ITIN applications in 7 to 11 weeks during non-peak periods and 9 to 14 weeks during tax season (January through April). Applications submitted through a Certifying Acceptance Agent (CAA) average 8 weeks. Mail-in applications take the longest at 11 to 14 weeks because the IRS must verify original documents before processing.

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