Form W-7 is the IRS form used to apply for an Individual Taxpayer Identification Number (ITIN). Getting it right the first time is critical — errors or missing information are the #1 reason for ITIN application rejections. This guide walks you through the form section by section.
IRS Enrolled Agent & Certified Acceptance Agent since 2015. Has processed 2,000+ ITIN applications.
Form W-7, officially titled "Application for IRS Individual Taxpayer Identification Number," is the only form accepted by the IRS to apply for an ITIN. An ITIN is a nine-digit tax processing number issued to individuals who are required to have a U.S. taxpayer identification number but do not qualify for a Social Security Number (SSN).
You must file Form W-7 if you:
In most cases, Form W-7 must be submitted along with a federal tax return. However, certain exceptions allow you to apply without filing a return — for example, if you're receiving treaty benefits or are a dependent of a U.S. military member stationed abroad.
You can download the current version of Form W-7 from IRS.gov. For a broader overview of the ITIN application process, see our complete ITIN application guide.
Form W-7 is structured into several key sections. Here's what you need to know about each one:
Check the box that describes why you're applying. The most common is Box (a) "Nonresident alien required to get ITIN to claim tax treaty benefit." If you're filing a tax return, you'll typically check Box (h) and specify the form number (e.g., "1040"). Choosing the wrong reason code is a common error that can delay processing.
Enter your legal name exactly as it appears on your passport or other identity documents. Line 1a is for your name in the local alphabet (if applicable), and Line 1b is for your name in English characters. Inconsistent names between Form W-7 and your supporting documents are a top rejection reason.
Line 2 is your mailing address (can be in the U.S. or abroad). Line 3 is your foreign (non-U.S.) address if you have one. Line 4 is your U.S. address if you have one. If you live outside the U.S., leave Line 4 blank. Do not use a P.O. Box for your foreign address.
Enter your date of birth and country of birth exactly as shown on your passport or birth certificate. Use the format MM/DD/YYYY for the date. Discrepancies here will cause rejections.
List the country where you are a citizen. If you hold dual citizenship, list both countries.
If your country of residence for tax purposes has issued you a tax identification number, enter it here. This is optional but recommended if available.
Check the type of documents you're submitting. A passport is the only standalone document accepted. If you don't have a passport, you must provide at least two other documents from the IRS's approved list (see the next section).
Pro Tip:
Always double-check that the information on Form W-7 matches your supporting documents character-for-character. Even minor spelling differences can result in a rejection.
Along with Form W-7, you must submit:
In most cases, you must attach a valid federal income tax return (Form 1040, 1040-SR, 1040-NR, etc.). The return does not need to be signed, but it must be complete. If you qualify for an exception to the tax return requirement, you must provide documentation supporting the exception.
You must prove your identity and foreign status. The IRS accepts 13 types of documents. A valid passport is the only standalone document — it proves both identity and foreign status by itself.
If you don't have a passport, you must submit at least two documents: one that proves identity and one that proves foreign status. Some documents can prove both.
The 13 acceptable documents are:
If you're applying under an exception (such as treaty benefits or mortgage interest reporting), you must include supporting documentation as specified in the Form W-7 instructions.
Important:
You must submit original documents or certified copies from the issuing agency. Notarized copies are not accepted. If you work with a Certified Acceptance Agent (CAA), they can authenticate your documents so you don't have to mail originals to the IRS.
The IRS rejects thousands of Form W-7 applications every year. Here are the most common errors and how to avoid them:
The Error: Applicants submit Form W-7 without the required federal tax return, or the return is incomplete (missing schedules, unsigned, etc.).
How to Avoid: Unless you qualify for a specific exception, always attach a complete, valid federal tax return. The return does not need to be signed, but all required forms and schedules must be included.
The Error: The name or date of birth on Form W-7 doesn't match the supporting documents exactly.
How to Avoid: Copy your name and DOB character-for-character from your passport or identity documents. Pay attention to middle names, hyphens, and accents. If your documents show different name formats, use the format from your passport.
The Error: Submitting an expired passport, ID card, or other supporting document.
How to Avoid: Check the expiration date on all documents before submitting. The IRS requires that all identity documents be current and valid. If your passport is expired, renew it before applying.
The Error: Forgetting to sign Form W-7 (or having a parent/guardian sign for a dependent).
How to Avoid: Sign and date the form in Line 6f. If the applicant is a dependent under age 18, a parent or court-appointed guardian must sign. If the applicant is a student or disabled dependent, the signature requirements vary — consult the instructions.
The Error: Checking the wrong box in the "Reason you are submitting Form W-7" section.
How to Avoid: Read the instructions carefully. If you're filing a tax return, check Box (h) and write the form number. If you're applying under an exception, check the appropriate exception box and provide required documentation.
Best Practice:
Before mailing your application, review the completed Form W-7 and all attachments with a checklist. Better yet, work with a Certified Acceptance Agent who can review your application and catch errors before submission.
You have three options for submitting your completed Form W-7:
Mail your completed Form W-7, tax return, and original (or certified copies of) supporting documents to:
Internal Revenue Service
ITIN Operation
P.O. Box 149342
Austin, TX 78714-9342
If using a private delivery service (FedEx, UPS, DHL), use:
Internal Revenue Service
ITIN Operation
Mail Stop 6090-AUSC
3651 S. Interregional Hwy
Austin, TX 78741
Caution: You must mail original documents or certified copies. The IRS will return them within 60 days, but there is a risk of loss or damage during transit.
You can apply in person at certain IRS Taxpayer Assistance Centers (TACs). Call ahead to schedule an appointment and confirm that the TAC processes ITIN applications. Bring your completed Form W-7, tax return, and original documents for review. The IRS will verify your documents and return them to you immediately.
A Certified Acceptance Agent (CAA) is an individual or business authorized by the IRS to assist applicants with Form W-7. CAAs can:
Working with a CAA is the safest and most convenient option, especially if you don't want to mail your passport or other original documents. Learn more about what a Certified Acceptance Agent does.
The IRS typically processes Form W-7 within 7 to 11 weeks. During peak tax season (January through April), processing times may be longer. Applications submitted through a CAA may receive faster processing. If you submitted original documents by mail, the IRS will return them within 60 days.
You can call the IRS ITIN hotline at 1-800-829-1040 (domestic) or 1-267-941-1000 (international) to check the status of your application. Have your Form W-7 confirmation number ready if available.
Unfortunately, the IRS does not offer an online status checker for ITIN applications.
If the IRS rejects your application, they will send you a letter explaining the reason. Common reasons include missing documentation, inconsistent information, or expired documents. You can reapply by submitting a corrected Form W-7 with the required documentation.
If you worked with a CAA, they can help you correct the errors and resubmit quickly.
Once approved, the IRS will send you a letter (CP 565) with your ITIN. This letter is your official proof of your ITIN. Keep it in a safe place. You'll use this number to file your tax returns, open bank accounts, apply for loans, and more.
Pro Tip:
Keep copies of your completed Form W-7 and all supporting documents for your records. If there's an issue with your application, having copies will make it easier to reapply or respond to IRS inquiries.
Mail completed Form W-7 to: Internal Revenue Service, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342. If using a private delivery service, use the street address: Internal Revenue Service, ITIN Operation, Mail Stop 6090-AUSC, 3651 S. Interregional Hwy, Austin, TX 78741.
You need a federal tax return (Form 1040, 1040-SR, etc.) and identity/foreign status documents. A valid passport is the only standalone document. Without a passport, you need at least two other documents from the IRS's approved list.
The IRS typically processes Form W-7 within 7-11 weeks. During peak tax season (January-April), processing may take longer. Applications through a CAA may receive faster processing.
Yes. A CAA can help you complete Form W-7 correctly, authenticate your identity documents so you don't have to mail originals, and submit the application to the IRS on your behalf. This is often the fastest and most convenient option.
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