ITIN for a spouse or dependent

Families with one US taxpayer and relatives without SSNs often apply for ITINs for everyone. Many of those applications are rejected or unnecessary, because the rules for spouses and dependents are narrower than people expect. This guide sets out when an ITIN is actually needed.

By Muhammad Bilal, Chartered Accountant. Reviewed by Awais Jameel, Chartered Accountant. Checked against official sources on . 3 minute read.

Short answer

A spouse needs an ITIN if they have no SSN and you file jointly, which for a non-resident spouse needs an election, or if they file their own return. A dependent needs one only if you claim a benefit for them, such as the $500 credit for other dependents, and must be a US citizen, national or resident, or live in Canada or Mexico.

At a glance

Spouse, joint return
Needs an SSN or ITIN
Non-resident spouse
Joint return only by election, taxing worldwide income
Married filing separately
Spouse without SSN or ITIN: write NRA, in many cases
Dependent
Only if claiming a benefit for them
Credit for other dependents
$500
Residency test
US citizen, national or resident, or resident of Canada or Mexico
ITIN for a spouse or dependentSpouse, joint return: Needs an SSN or ITIN; Non-resident spouse: Joint return only by election, taxing worldwide income; Married filing separately: Spouse without SSN or ITIN: write NRA, in many cases; Dependent: Only if claiming a benefit for them; Credit for other dependents: $500; Residency test: US citizen, national or resident, or resident of Canada or Mexico.KEY FACTS AT A GLANCEITIN for a spouse or dependentSpouse, joint returnNeeds an SSN or ITINNon-resident spouseJoint return only byelection, taxingworldwide incomeMarried filing separatelySpouse without SSN orITIN: write NRA, in manycasesDependentOnly if claiming abenefit for themCredit for other dependents$500Residency testUS citizen, national orresident, or resident ofCanada or MexicoChecked against official sourcesTax BakersITIN for a spouse or dependentSpouse, joint return: Needs an SSN or ITIN; Non-resident spouse: Joint return only by election, taxing worldwide income; Married filing separately: Spouse without SSN or ITIN: write NRA, in many cases; Dependent: Only if claiming a benefit for them; Credit for other dependents: $500; Residency test: US citizen, national or resident, or resident of Canada or Mexico.KEY FACTS AT A GLANCEITIN for a spouse or dependentSpouse, joint returnNeeds an SSN or ITINNon-resident spouseJoint return only by election, taxingworldwide incomeMarried filing separatelySpouse without SSN or ITIN: write NRA, inmany casesDependentOnly if claiming a benefit for themCredit for other dependents$500Residency testUS citizen, national or resident, orresident of Canada or MexicoChecked against official sourcesTax Bakers
Key facts at a glance, as set out in this guide.

When does a spouse need an ITIN?

SituationDoes the spouse need an ITIN?
You file a joint return and your spouse has no SSNYes
Your spouse has US income and must file their own returnYes, unless eligible for an SSN
You file married filing separately and your non-resident spouse has no US income and no return to fileOften no: enter "NRA" in place of the spouse's number
You file as head of household, treating a non-resident spouse as not married to you for that purposeNo, for the spouse

Should you file jointly with a non-resident spouse?

A US citizen or resident married to a non-resident can elect to treat the spouse as a US resident for the whole year and file jointly. The joint rates and standard deduction can lower the tax, but the spouse's worldwide income then becomes taxable in the US, and the election continues for later years until ended. Compare the tax both ways before electing. The spouse then needs an SSN or ITIN, and the W-7 is attached to the joint return.

For the rest of a new arrival's first-year decisions, see your first US tax return after moving to the US.

What if your spouse is eligible for an SSN?

Then they must apply for an SSN rather than an ITIN. A spouse with US work authorization, such as through an employment-based visa or permanent residence, is eligible for an SSN, and the IRS rejects ITIN applications from people who can get one. Apply to the Social Security Administration and use the SSN on the return.

When does a dependent need an ITIN?

Only when you are claiming a tax benefit for them. The main one available with an ITIN is the credit for other dependents, $500 per qualifying dependent. To be your dependent, the person must be a US citizen, national or resident, or a resident of Canada or Mexico. So a child or parent who lives in Pakistan or India and is not a US citizen generally cannot be claimed, and should not be given an ITIN application at all. The child tax credit requires the child to have an SSN.

What documents do dependents need?

  • A passport, the only document that proves both identity and foreign status on its own.
  • A passport for a dependent must show a US entry date, unless the dependent is from Canada or Mexico, or is the dependent of US military personnel stationed abroad.
  • Without that date, proof of US residency is also needed: US medical records for children under 6, or school records for those under 18, for example.

A Certifying Acceptance Agent can certify only passports and birth certificates for dependents. See Certifying Acceptance Agents and ITIN documents required.

How do you apply?

  1. Confirm each person needs one

    Using the rules above.

  2. Complete a Form W-7 for each

    Ticking the reason box for a spouse or dependent.

  3. Attach the tax return

    The return claiming the spouse or dependent, with each W-7 on top.

  4. Send documents

    Originals, certified copies, or through a Certifying Acceptance Agent.

Why are family applications rejected?

Most often because the dependent does not meet the residency test, the passport lacks a US entry date with no residency proof, or no benefit is claimed for the person on the return. See ITIN application rejected.

Applying for family ITINs?

We check whether each family member actually needs an ITIN, prepare the W-7s with the right return, and work with a Certifying Acceptance Agent.

Book a call Chat on WhatsApp

Questions people ask

Does my spouse need an ITIN to file jointly?

Yes, if your spouse has no SSN and is not eligible for one.

Can I claim my parents abroad as dependents with an ITIN?

Generally not. Dependents must be US citizens, nationals or residents, or residents of Canada or Mexico.

What tax benefit can I claim for a dependent with an ITIN?

Mainly the $500 credit for other dependents. The child tax credit requires the child to have an SSN.

What if my non-resident spouse has no US income and I file separately?

In many cases you can enter NRA instead of an identifying number for the spouse.

Sources

Every fee, date and rule on this page was taken from these official and primary sources.

  1. IRS: Instructions for Form W-7
  2. IRS Publication 501: Dependents, Standard Deduction and Filing Information
  3. IRS: Nonresident spouse
  4. IRS: Individual taxpayer identification number

Rules and fees change. If you are reading this long after October 1, 2026, confirm the figures with the source before you rely on them.

EIN and ITINHow to apply for an ITIN: Form W-7 step by stepEIN and ITINITIN documents: what the IRS accepts as proof of identityEIN and ITINCertifying Acceptance Agents: what they do and when to use one

More in EIN and ITIN

Next in this topicITIN application rejected: common reasons and how to reapplyTopicAll 25 guides in EIN and ITIN

This guide is general information. It is not tax or legal advice for your situation.