Tax season arrives and your H-1B spouse wants to file jointly. The software asks for your Social Security number, and you don't have one. That is what an ITIN is for.
As of November 2, 2026, this guide covers when an H-4 spouse needs one, how to apply, and what it does and doesn't do.
- An ITIN is a 9-digit IRS number for people with a federal tax purpose who aren't eligible for an SSN.
- Spouses qualify only if claimed for an allowable tax benefit or filing their own return.
- Filing a joint return is an allowable tax benefit.
- You apply on Form W-7, generally attached to a federal tax return.
- Documents must be originals or certified copies from the issuing agency.
- The IRS says to allow 7 weeks, or 9 to 11 weeks from January 15 to April 30.
What is an ITIN?
A tax number for people who can't get an SSN. The IRS describes it as "a 9-digit number the IRS issues if you need a U.S. taxpayer identification number for federal tax purposes, but you aren't eligible for a Social Security number (SSN)" (IRS, Individual Taxpayer Identification Number).
H-4 spouses without an EAD usually fall into that group, because SSA doesn't issue numbers for taxes. Its manual says the IRS "assigns an ITIN to a taxpayer, spouse, or dependent who needs a TIN for tax purposes, but does not otherwise meet SSA's requirements for an SSN" (SSA POMS RM 10211.615). An H-4 EAD, by contrast, makes you work authorized and eligible for an SSN. Our guide to the SSN on H-4 explains SSA's rules.
When does an H-4 spouse need one?
Only when there is a federal tax purpose. The IRS is specific about spouses: "You're only eligible for an ITIN if either: You can be claimed for an allowable tax benefit" or "You file your own tax return" (IRS, Individual Taxpayer Identification Number).
The usual reason is a joint return. The IRS lists "Spouse filing a joint return" as an allowable benefit, explaining that someone "who's not eligible for an SSN" can "file a joint tax return with a spouse who's a U.S. citizen or resident alien." Whether your H-1B spouse is a resident alien for tax purposes depends on the substantial presence test. Our guide to taxes for H-1B workers and green card holders explains it.
Who doesn't need one: the IRS lists a "Nonresident alien with a U.S. work visa (since you qualify for an SSN)" and a "Permanent legal resident of the U.S. (green card holder)." So an H-4 spouse with an EAD should get an SSN instead. "An ITIN will not be issued to you once you have been issued an SSN" (IRS, Instructions for Form W-7).
How do you apply?
On Form W-7. The instructions say people "applying for an ITIN must include a U.S. federal tax return unless they meet an exception, and the required documentation" (IRS, Instructions for Form W-7). The return must show the benefit, such as the joint filing status.
You have three routes:
| Route | How it works |
|---|---|
| By mail | Send the W-7, return and documents to the IRS ITIN Operation in Austin, Texas |
| In person | IRS Taxpayer Assistance Centers verify documents and return them immediately; "Service at TACs is by appointment only" |
| Certifying Acceptance Agent | A CAA can verify certain documents and return them, so originals don't go in the mail |
Documents must be real. "You must submit original documents, or certified copies of these documents from the issuing agency." A certified copy is one "that the original issuing agency provides and certifies as an exact copy," with "an official stamped seal from the agency." A notarized photocopy isn't the same thing. Documents must also be "current (that is, not expired at the time you submit your application)."
For most H-4 spouses, the passport is the key document. If you mail it, the IRS says "if your original documents aren't returned within 60 days, you can call the IRS."
What if you applied to SSA first?
Then attach the refusal. The instructions say "if you have an application for an SSN pending, don't file Form W-7," and "if the SSA determines that you're not eligible for an SSN, you must get a letter of denial and attach it to your Form W-7" (IRS, Instructions for Form W-7).
How long does it take?
About two months. "Allow 7 weeks for the IRS to notify you of your ITIN application status (9 to 11 weeks if you submit the application during peak processing periods (January 15 through April 30) or if you're filing from overseas)." So filing early in the year can save time.
Does an ITIN expire?
Yes, if you stop using it. "If your ITIN wasn't included on at least one U.S. federal tax return for the last 3 consecutive tax years, it expires on December 31 of the third consecutive tax year." If you move to an SSN later, for example with an H-4 EAD or a green card, the IRS says "stop using your ITIN. Use your SSN instead."
What an ITIN can't do
It is a tax number only. "The ITIN is for federal tax purposes only," and "an ITIN doesn't entitle you to social security benefits and doesn't change your immigration status or your right to work in the United States" (IRS, Instructions for Form W-7). Our guide to the H-4 EAD covers the route to working, and our guide to which spouse should be the principal applicant explains how a green card case can rest on either spouse's record.
What this means for you
- Get an ITIN only if you have a federal tax purpose, usually a joint return.
- Attach Form W-7 to the return, with original or certified documents.
- Use a Taxpayer Assistance Center or CAA if you don't want to mail your passport.
- File early to avoid the 9 to 11 week peak wait.
- Switch to an SSN once you are eligible.
Where to start
If your family's status rests on one H-1B, a green card would end the ITIN and EAD juggling. Our free evaluation at /evaluate/ checks whether EB-1A or the NIW fits either spouse's profile, and Frank, our AI assistant at /frank, helps you build the evidence. Petitions are reviewed and filed by our partner law firm, Lai & Turner.
Sources
All checked November 2, 2026.
- IRS, Individual Taxpayer Identification Number. Definition; spouse eligibility; joint returns; who doesn't need one.
- IRS, Instructions for Form W-7 (Rev. December 2024). Application routes; documents; processing times; expiry; limits.
- SSA POMS RM 10211.615. SSA doesn't assign SSNs for tax purposes.
Frequently asked questions
Does an H-4 spouse need an ITIN?
Only if there is a federal tax purpose and the spouse isn't eligible for an SSN. The most common case is filing a joint return with the H-1B spouse. The IRS says spouses are eligible for an ITIN only if they can be claimed for an allowable tax benefit or file their own tax return. An H-4 spouse with an EAD should get an SSN instead.
How does an H-4 spouse apply for an ITIN?
Complete Form W-7 and attach it to the federal tax return, with original identity documents or certified copies from the issuing agency. You can mail it to the IRS in Austin, apply in person at an IRS Taxpayer Assistance Center by appointment, or use a Certifying Acceptance Agent, which can verify a passport and return it.
Do I have to mail my passport to get an ITIN?
Not necessarily. The IRS accepts originals or certified copies from the issuing agency, and Taxpayer Assistance Centers and Certifying Acceptance Agents can verify your documents and return them right away. If you mail an original passport, the IRS says to call if it isn't returned within 60 days.
How long does it take to get an ITIN?
The Form W-7 instructions say to allow 7 weeks for the IRS to notify you of your application status. If you apply during peak season, January 15 through April 30, or from overseas, allow 9 to 11 weeks. If you hear nothing by then, you can call the IRS.
Does an ITIN let an H-4 spouse work?
No. The IRS says an ITIN is for federal tax purposes only and doesn't change your immigration status or your right to work in the United States. It also doesn't entitle you to Social Security benefits. To work, an H-4 spouse needs an approved H-4 EAD.
Green Card Guide AI is not a law firm and this article is not legal advice. It describes evidence-building strategy in general terms; your attorney determines what belongs in your petition and how it's argued.
