ITIN for Expats: Does Your Spouse or Dependent Need One?

An ITIN is a U.S. tax identification number for someone who needs one for federal tax purposes but isn’t eligible for a Social Security number. If you live abroad, your non-U.S. spouse or a dependent may need an ITIN to appear on your return or claim an eligible tax benefit.

At Bright!Tax, we help Americans abroad work through the filing decisions that come with international families. The first step is checking whether your family member needs an ITIN—and whether they’re eligible for an SSN instead.

What is an ITIN—and how is it different from an SSN?

An Individual Taxpayer Identification Number, or ITIN, is a nine-digit tax processing number issued by the Internal Revenue Service for federal tax purposes.

You may also hear it called an individual tax identification number or an ITIN number. The official name is Individual Taxpayer Identification Number.

It looks like a Social Security number, but the two aren’t interchangeable.

Question	ITIN	Social Security number
Who issues it?	Internal Revenue Service (IRS)	Social Security Administration
Who can receive it?	Someone who needs a federal tax identification number and isn’t eligible for an SSN	Someone who qualifies under the Social Security Administration’s rules
Can it be used for federal tax reporting?	Yes	Yes
Does the number itself authorize work?	No	Work authorization depends on the person’s status and the type of SSN issued
Does it grant immigration status?	No	No
Does it automatically establish eligibility for Social Security benefits?	No	No; eligibility depends on the applicable benefit rules

An ITIN can appear on federal returns and other tax documents. It doesn’t, by itself, establish that someone qualifies as a dependent or is eligible for a particular credit.

For example, if your child is eligible for an SSN but hasn’t received one yet, the answer is to apply for the SSN—not assume an ITIN can take its place.

Is an ITIN the same as an EIN?

No. An Employer Identification Number, or EIN, is a different federal tax identification number used by businesses and certain other entities. Despite its name, an entity can need an EIN even if it has no employees.

An ITIN identifies an individual for federal tax purposes when that person needs a taxpayer identification number and isn’t eligible for an SSN. An EIN doesn’t replace an individual’s required SSN or ITIN on a personal tax return.

When do you need an ITIN?

Your spouse or dependent doesn’t need an ITIN simply because they’re related to you or live abroad. The IRS requires a qualifying federal tax reason for issuing one.

Situation	What to check
You plan to file jointly with a nonresident spouse	Whether the required election applies and whether your spouse is eligible for an SSN or needs an ITIN
You plan to claim a dependent	Whether the person meets the dependent tests and has an allowable tax reason for an ITIN
A nonresident has their own U.S. filing requirement	Whether they need an ITIN to file or meet another federal tax obligation
Your spouse or dependent already has an ITIN	Whether it is still valid for the return you’re preparing
Your family member is eligible for an SSN	Apply for the SSN rather than an ITIN

Filing jointly with a non-U.S. spouse

If you’re a U.S. citizen or resident married to a nonresident alien, you and your spouse can choose to treat the nonresident spouse as a U.S. resident for federal income tax purposes, if you meet the requirements.

That election lets you file a joint return, but it also brings your spouse’s worldwide income into the U.S. tax calculation while the election is in effect.

Both spouses need taxpayer identification numbers. If your spouse isn’t eligible for an SSN, they generally need an ITIN.

Consider Maya, a U.S. citizen living in France with her French husband, Julien. They’re considering filing jointly, and Julien isn’t eligible for an SSN.

For a couple in Maya’s position, we would first compare the filing options and review Julien’s worldwide income. If they make the nonresident-spouse election and file jointly, Julien’s ITIN application becomes part of the filing plan.

The election is a tax decision as well as a paperwork decision. A joint return can change deductions, credits, and the income that must be reported.

Claiming a dependent without an SSN

A dependent who needs a taxpayer identification number but isn’t eligible for an SSN may qualify for an ITIN. First, though, the person must meet the applicable dependent requirements and have a qualifying reason for the application.

For spouse and dependent applications, the IRS generally requires an allowable tax benefit or the person’s own federal tax filing requirement. The Form W-7 instructions explain how to identify the reason.

A family relationship alone doesn’t settle dependent status. Depending on the situation, the tests can involve:

• Citizenship or residency.
• Relationship to the taxpayer.
• Income.
• Financial support.
• Whether the person files a joint return.
• Other rules specific to the claimed benefit.

For instance, Arjun, a U.S. citizen in India, helps support his mother, who has always lived in India and is neither a U.S. citizen nor a U.S. resident. Financial support alone doesn’t establish that he can claim her as a dependent.

We would check the dependent tests before considering an ITIN application. An identification number can’t turn someone into a qualifying dependent.

What if I file separately?

A nonresident spouse doesn’t automatically need an ITIN simply because you’re married and filing separately.

The return instructions depend on the facts and filing status. Before applying for a number your spouse may not need, check whether the return requires one and whether they have another qualifying federal tax reason for an ITIN.

Can foreign nationals need an ITIN for a scholarship or fellowship?

Yes. Some foreign nationals who aren’t eligible for an SSN may need an ITIN because of a U.S. tax filing or reporting requirement involving a scholarship or fellowship.

The facts matter. For example, a nonresident student receiving a taxable U.S. scholarship might need a taxpayer identification number for the applicable reporting or treaty claim. Certain applicants can qualify for an exception to the requirement to attach a tax return to Form W-7.

Before applying, check the Form W-7 instructions for the specific exception and supporting documents. Receiving a scholarship or fellowship doesn’t automatically mean an ITIN is required in every case.

Can you claim tax credits with an ITIN?

Sometimes. Each credit has its own identification and eligibility rules, and an ITIN that works for one purpose may not be enough for another.

Tax benefit	How an ITIN can affect eligibility
Child Tax Credit and Additional Child Tax Credit	A qualifying child needs the required SSN; on a joint return, one spouse can have an ITIN if the other spouse has the required SSN
Credit for Other Dependents	A qualifying dependent can have an ITIN, subject to the credit’s other requirements
Earned Income Tax Credit	The taxpayer, spouse on a joint return, and any child claimed for EITC need qualifying SSNs
American Opportunity and Lifetime Learning Credits	New SSN requirements apply beginning with tax year 2026
Child and Dependent Care Credit	An ITIN can identify a qualifying person who can’t get an SSN; other credit requirements apply
Adoption Credit	An eligible child’s identifying number can be an SSN, ITIN, or adoption taxpayer identification number, subject to the applicable rules

Child Tax Credit and Credit for Other Dependents

For the Child Tax Credit and refundable Additional Child Tax Credit, the qualifying child must have the required SSN. An ITIN isn’t enough for that child.

The taxpayer claiming the credit must also meet the SSN requirement. On a joint return, one spouse can have an ITIN if the other spouse has the required SSN.

Suppose Danielle, a U.S. citizen in the Netherlands, files jointly with her Dutch spouse, who has an ITIN. Their qualifying child has the required SSN.

Her spouse’s ITIN doesn’t automatically prevent the family from claiming the Child Tax Credit. We would still check the child’s eligibility, income limits, and the rest of the return.

A dependent who doesn’t qualify for the Child Tax Credit may instead qualify for the Credit for Other Dependents. An ITIN can satisfy that credit’s identification requirement, but the dependent must also meet its other conditions, including being a U.S. citizen, U.S. national, or U.S. resident alien.

The credit is nonrefundable and can be worth up to $500 per qualifying dependent.

Earned Income Tax Credit

The Earned Income Tax Credit, or EITC, requires qualifying SSNs for the taxpayer, the spouse on a joint return, and any child claimed for the credit.

An ITIN can’t substitute for those SSNs. Someone who meets the applicable rules may still qualify for the EITC without claiming a qualifying child.

There’s another expat-specific restriction: you can’t claim the EITC if you file Form 2555. Other income and residency requirements also apply.

Education credits

Beginning with tax year 2026, the American Opportunity Tax Credit and Lifetime Learning Credit have new SSN requirements.

The taxpayer—or at least one spouse on a joint return—and a dependent student must have the required SSNs by the applicable return deadline, including extensions. An ITIN alone doesn’t satisfy the new SSN requirement for the dependent student.

If a family claimed an education credit in an earlier year using an ITIN, we would review the 2026 rules before assuming the same credit is available again.

Child and Dependent Care Credit

For the Child and Dependent Care Credit, the IRS requires a taxpayer identification number for each qualifying person. If that person is a resident or nonresident alien who can’t obtain an SSN, an ITIN can be used.

The credit has separate rules covering the person receiving care, the expenses, earned income, and the care provider. The maximum percentage of qualifying expenses rises to 50% for tax year 2026, but the amount available depends on income and the other requirements.

When should you renew an ITIN?

An ITIN expires if it hasn’t been included on a U.S. federal tax return for three consecutive tax years. If you need to use it on a current return after it expires, you need to renew it.

ITIN history	What to check
Used on a federal return during the relevant three-year period	It hasn’t expired under the three-year nonuse rule
Not used on a federal return for three consecutive tax years	It expires at the end of the third consecutive year
Expired, but not needed on a current return	Renewal may not be necessary yet
Expired and needed on a current return	Review the renewal requirements
IRS sent an expiration or renewal notice	Check the notice against the return you’re preparing

For example, Sofia’s spouse has an ITIN that wasn’t included on a U.S. federal return for tax years 2023, 2024, or 2025. If the couple wants to use it on a 2026 return, we would check renewal before preparing the filing.

Spouses and dependents renewing an ITIN for an allowable tax benefit generally must be listed on an attached return, with the applicable benefit identified. They can’t assume an independent renewal is available simply because the number has expired.

Use IRS Form W-7 for both initial applications and renewals, following the relevant instructions.

How to apply for an ITIN from abroad

Most first-time applicants submit IRS Form W-7, the Application for IRS Individual Taxpayer Identification Number, with a federal income-tax return and the required supporting documents. Some applicants qualify for an exception and apply without attaching a return.

Here’s how the ITIN application process works:

Step	What to prepare
1. Confirm eligibility	Establish the federal tax reason for the ITIN and confirm the person isn’t eligible for an SSN
2. Complete Form W-7	Each applicant needs a separate form
3. Prepare the return or exception documents	Attach the return unless an applicable exception allows otherwise
4. Gather supporting documents	Prove identity and foreign status using documents accepted by the IRS
5. Choose a submission route	Mail the package or use an available authorized assistance option
6. Allow time for processing	Keep copies of the application and monitor IRS correspondence

What documents do you need?

The IRS requires evidence of identity and foreign status. A current passport generally establishes both, although additional rules apply in some dependent cases.

If you don’t use a passport, you may need a combination of accepted documents. For example, a U.S. driver’s license can help establish identity, but it doesn’t establish foreign status on its own.

When submitting copies directly, they must be certified by the issuing agency. Ordinary photocopies and notarized copies aren’t a substitute for an issuing-agency-certified copy.

Document situation	What to check
Current passport	Whether it establishes both identity and foreign status for the applicant
No passport	Which combination of documents the IRS accepts
U.S. driver’s license	Whether it is current and what additional document establishes foreign status
Dependent’s passport without a U.S. entry date	Whether additional U.S. residency evidence is required or an exception applies
Child under 18 without a valid passport	The IRS requires a civil birth certificate, subject to its submission rules
Name differs across documents	Whether supporting evidence, such as a marriage certificate, is needed

The IRS supporting-document list sets out the accepted documents and conditions.

Do you have to mail your passport?

Not necessarily. The options depend on where you are and which documents need verification.

Option	What it does	Important limitation
Mail to the IRS	Submit originals or copies certified by the issuing agency	Originals must travel with the package and be returned by the IRS
Certifying Acceptance Agent	An IRS-authorized CAA can authenticate many documents and return them after review	For dependents, CAAs can authenticate only passports and civil birth certificates; other dependent documents must be sent to the IRS
Acceptance Agent	Helps complete and submit the application	An Acceptance Agent doesn’t have the same document-authentication authority as a CAA
IRS Taxpayer Assistance Center	Certain U.S. centers authenticate documents by appointment	The applicant must be able to attend an appropriate center

CAA availability varies by country, and agents can charge fees. The IRS maintains a list of ITIN acceptance agents.

Imagine Leila in Canada is preparing an ITIN application for her dependent. A local CAA can review the child’s passport, but if the IRS also requires another type of dependent document, she needs to check how that document must be submitted.

Can you e-file with a first-time ITIN application?

Usually, a first-time applicant who must attach a return submits the paper return, Form W-7, and supporting documents together. That return ordinarily isn’t e-filed as part of the initial application package.

Check the W-7 instructions if an exception allows an application without an attached return.

How long does an ITIN application take?

The IRS says to allow approximately seven weeks for notification of your application status.

During the peak period of January 15 through April 30, or when applying from overseas, the IRS says notification can take nine to eleven weeks.

That is an application-status estimate, not a guarantee that the associated return or refund will be completed within the same period. Missing documentation, requests for information, or a rejected application can add time.

If the IRS assigns an ITIN, keep the notice with your records. If it requests more information, respond using the instructions in the notice.

What happens if you later receive an SSN?

If someone who already has an ITIN later becomes eligible for and receives an SSN, they should notify the IRS.

The IRS can update its records so the person’s tax information is associated with the SSN. They should use the SSN for future filings rather than continue using the ITIN.

The IRS ITIN application FAQs explain how to notify the agency.

Make sure your ITIN and filing are in sync

A missing identification number can delay a return, but applying for a number before checking the rules can create extra work too. Filing status, dependent eligibility, credit requirements, and documentation all need to fit together.

At Bright!Tax, we help Americans abroad understand their U.S. filing options and the tax questions that arise when a spouse or dependent has an ITIN. We review the return as a whole so you can make informed decisions about filing status and available benefits.

Get help with your U.S. expat tax return.

Frequently Asked Questions (FAQ)