Nonresident Alien Spouse

Katelynn Minott, CPA & CEO July 11th, 2026

A nonresident alien spouse is a husband or wife who is not a U.S. citizen, U.S. national, or U.S. tax resident. For U.S. expats, the term matters because it affects filing status, whether a joint return is available, whether the spouse’s worldwide income enters the U.S. tax system, and whether the spouse needs an SSN or ITIN.

Why it matters for U.S. expats

A U.S. citizen or resident married to a nonresident alien spouse usually has a choice to make: file separately and keep the spouse’s non-U.S. income outside the U.S. return, or make an election to file jointly and treat the spouse as a U.S. resident for federal income tax purposes. Filing jointly can produce a better tax result in some households, but it can also bring foreign wages, business income, pensions, investments, accounts, and tax reporting into the U.S. system.

Common questions

1. Who counts as a nonresident alien spouse?

A nonresident alien spouse is a spouse who is not a U.S. citizen or U.S. national and does not meet the green card test or substantial presence test for U.S. tax residency.

2. Can a U.S. expat file jointly with a nonresident alien spouse?

Yes, if both spouses make an election to treat the nonresident alien spouse as a U.S. resident for federal income tax purposes. The couple must file a joint return for the year the election is made.

3. What happens if a nonresident alien spouse election is made?

Both spouses are treated as U.S. residents for federal income tax purposes while the election is in effect. They must report worldwide income on the U.S. return.

4. Does the nonresident alien spouse have to report foreign income after the election?

Yes. Once the election is made, the nonresident alien spouse’s worldwide income is included for the year of the election and later years unless the election is ended or suspended.

5. Can a U.S. expat file separately from a nonresident alien spouse?

Yes. If no resident-spouse election is made, the U.S. spouse can file as married filing separately and report only their own income on the U.S. return.

6. Can a U.S. expat qualify for head of household with a nonresident alien spouse?

Yes, if the U.S. spouse meets the head of household rules and pays more than half the cost of maintaining a household for a qualifying person other than the nonresident alien spouse.

7. Does a nonresident alien spouse need an ITIN?

A nonresident alien spouse needs an SSN or ITIN if they are included on a joint U.S. return, file their own U.S. return, are claimed for a tax benefit that requires a taxpayer identification number, or need a U.S. taxpayer identification number for another IRS purpose.

8. How does a nonresident alien spouse get an ITIN?

A spouse who is not eligible for an SSN applies for an ITIN using Form W-7, usually with a federal tax return or through another approved application route.

9. Is filing jointly with a nonresident alien spouse always better?

No. Filing jointly can improve tax rates, deductions, or credits, but it can also expose the spouse’s foreign income and assets to U.S. income tax and reporting.

10. Can a nonresident alien spouse claim tax treaty benefits after the election?

Usually not as a resident of a foreign country while the election is in effect. Some treaty benefits may still be available if an exception to the treaty saving clause applies.

11. Can the election be ended?

Yes. The election can end through revocation, death, legal separation, or inadequate records. Once ended, the election cannot be made again by either spouse in a later year.

12. Does electing to treat a spouse as a U.S. resident make them a U.S. person for FBAR?

It can. A spouse treated as a U.S. resident for federal tax purposes may also have U.S. reporting obligations that need to be reviewed, including FBAR, Form 8938, and other foreign asset forms.

13. What if the nonresident alien spouse has U.S.-source income?

The spouse may need to file Form 1040-NR separately if they have a U.S. filing requirement, unless a joint resident-spouse election changes the filing approach.

14. What records should expats keep when filing with a nonresident alien spouse?

Keep marriage records, citizenship and residency details, visa or immigration records, day-count records for U.S. presence, foreign income statements, foreign tax returns, account statements, ITIN documents, and any signed election statement.

When to get help

Professional guidance is important when:

You are a U.S. citizen or resident married to a nonresident alien spouse.
You are choosing between married filing jointly, married filing separately, and head of household.
Your spouse has foreign wages, business income, investments, pensions, rental income, or foreign accounts.
Your spouse needs an ITIN.
You are considering the election to treat your spouse as a U.S. resident.
You previously made the election and want to end or review it.
You need to coordinate filing status with the Foreign Earned Income Exclusion, Foreign Tax Credit, Child Tax Credit, FBAR, FATCA, or treaty issues.

Bright!Tax can compare filing options, review the tax impact of a nonresident alien spouse election, and prepare the U.S. return and ITIN paperwork where needed. Get started with Bright!Tax.

Child Tax Credit for Americans living abroad

Official sources

Reviewed by

Katelynn Minott, CPA & CEO

Last reviewed

July 2026