ITIN Application Guide (Form W-7) for H-1B Families

H-1B visa holders frequently need Individual Taxpayer Identification Numbers (ITINs) for non-working spouses, children in India, or elderly parents brought to the U.S. on visitor visas. An ITIN is not an SSN — it is issued by the IRS solely for federal tax reporting. Understanding the Form W-7 process, document requirements, and the Certifying Acceptance Agent (CAA) option saves weeks of delay and prevents your return from being held pending dependent identification.

Who Needs an ITIN?

An ITIN is required by any person who must file a U.S. tax return or be claimed as a dependent on one, and who is not eligible for a Social Security Number. For H-1B families, the most common cases are:

Form W-7: Step-by-Step Application Process

Form W-7, Application for IRS Individual Taxpayer Identification Number, is a two-page form submitted either with your tax return or separately. The process involves five steps:

1. Complete Form W-7. Select the reason for applying (Box a–h). For H-4 dependents and children, the typical reason is Box a: “Nonresident alien required to get an ITIN to claim tax treaty benefit” or Box e: “Nonresident alien student, professor, or researcher filing a U.S. tax return.” For non-filing dependents claimed on another's return, select the appropriate box. Provide the applicant's full legal name, date and place of birth, country of citizenship, and foreign tax ID if applicable.
2. Gather identity and foreign status documents. The IRS accepts 13 types of documents. For most Indian nationals, a valid Indian passport is both sufficient and preferable — it satisfies both the identity and foreign status requirements with a single document. You must provide the original or a certified copy.
3. Attach your tax return (if applying for an ITIN to file). The W-7 is submitted with your paper return. Exceptions exist for certain treaty claims and dependents of individuals who filed a return but whose ITIN application was separate.
4. Submit to the IRS ITIN office by mail to: Internal Revenue Service, ITIN Operation, P.O. Box 149342, Austin, TX 78714-9342. Processing takes 6 to 11 weeks.
5. Receive the ITIN assignment letter. The IRS sends a CP565 notice with the assigned ITIN (format: 9XX-XX-XXXX). Keep this letter permanently — it is your proof of ITIN issuance.

Using a Certifying Acceptance Agent (CAA)

A Certifying Acceptance Agent is an individual or organization authorized by the IRS to review original identity documents and certify copies — so you do not have to mail your original Indian passport to Austin, Texas, and wait weeks for it to be returned.

The CAA process works as follows:

• You visit the CAA with original identity documents (typically a valid Indian passport for each person needing an ITIN).
• The CAA reviews the originals and prepares a certified copy (Form W-7 COA, Certificate of Accuracy). This document substitutes for the original.
• The CAA also prepares or reviews your Form W-7 and submits the application package to the IRS — either with your return or separately.
• Your original passport never leaves your hands, eliminating the risk of documents being lost in transit.

CAAs are found at many H&R Block offices, immigrant services organizations, and independent tax professionals who specialize in nonresident and H-1B tax issues. The IRS maintains a searchable directory of CAAs on its website at irs.gov/tin/itin/certifying-acceptance-agents. CAA fees typically range from $50 to $150 per applicant.

Required Documents for Indian Nationals

The IRS requires documents that establish both identity and foreign status. For most Indian nationals, one document satisfies both:

For children, the IRS accepts a birth certificate with a photo of the child (if under 14) when a passport is unavailable. For children 14 and older, a valid passport is preferred. Documents must be current — expired passports are not accepted even if the applicant is still living under the same name and identity.

ITIN Renewals and Expiration

The IRS began deactivating ITINs on a rolling schedule starting in 2016. The rules for 2026 are:

• Unused ITINs expire automatically. Any ITIN not used on a federal tax return for 3 consecutive years (Tax Years 2022, 2023, and 2024, for example) is expired and must be renewed before use in TY2025/2026.
• Middle digits renewal schedule. The IRS also proactively deactivates ITINs based on the middle two digits on a rotating schedule. Check the current year's IRS schedule for which middle-digit groups are expiring.
• Renew using the same Form W-7. Submit W-7 with Box h checked (“Other — renewal”), along with supporting documents. You do not need to attach a tax return when renewing, but you may do so.
• Family members can renew simultaneously. If multiple family members have expiring ITINs, include all W-7 applications in a single submission.

Filing a return with an expired ITIN results in the IRS disallowing any credits associated with that dependent. You will receive a CP48 notice. To correct this, amend the return after the ITIN is renewed. This can delay refunds by several months.

Timeline and Practical Tips

The ITIN process takes longer than most H-1B filers expect. Here is a realistic timeline:

If you are expecting a refund and have dependents requiring new ITINs, file as early as possible — preferably in February. Waiting until late March or April with ITIN applications virtually guarantees a post-April 15 refund, which is fine but means cash flow is delayed.

Related guides: Child Tax Credit vs ODC for ITIN Dependents | Married Filing Jointly vs Separately for H-1B