Can I File Married Filing Jointly If Spouse Has No SSN?

Yes, you can file Married Filing Jointly even if your spouse has no Social Security Number, but it takes two steps: electing under Internal Revenue Code Section 6013(g) to treat your nonresident spouse as a U.S. resident for tax purposes, and applying for an Individual Taxpayer Identification Number (ITIN) so your spouse has a number to put on the return. The financial pull is real. For tax year 2026, joint filers get a $32,200 standard deduction compared to $16,100 for Married Filing Separately.¹ The tradeoff is that your spouse’s worldwide income comes onto your return, and that reshapes the math for a lot of couples.

The Section 6013(g) Election

Joint filing is not automatic when one spouse is a nonresident alien. You have to affirmatively choose it. Under IRC 6013(g), both spouses agree to treat the nonresident spouse as a U.S. resident for the full tax year, and at the close of that year at least one spouse must be a U.S. citizen or resident alien.²

You make the election by attaching a signed statement to your joint Form 1040. Both spouses sign. The statement includes each spouse’s name, address, and taxpayer identification number; a declaration that one spouse was a nonresident alien on the last day of the tax year and the other was a U.S. citizen or resident alien; and the couple’s choice to be treated as U.S. residents for the entire year.³

You only make the election once. It carries forward automatically into every subsequent year until something ends it.

What the Election Costs You

Once the election is in effect, your nonresident spouse is subject to U.S. tax on their worldwide income for every year it stays in effect. Foreign wages, foreign bank account interest, foreign investment gains — all of it goes on your joint Form 1040.² The election also generally blocks your spouse from claiming benefits as a resident of their home country under a U.S. income tax treaty.

For couples where the nonresident spouse earns little or nothing abroad, this is a good deal. Where the nonresident spouse has significant foreign earnings or investments, the math turns against joint filing quickly.

Foreign Account Reporting

This part catches people off guard. Treating your spouse as a U.S. resident pulls their foreign accounts into two separate reporting regimes.

The first is the Report of Foreign Bank and Financial Accounts, filed as FinCEN Form 114 (the FBAR). If the combined value of all foreign financial accounts exceeds $10,000 at any point in the calendar year, both spouses must file. The FBAR goes to the Financial Crimes Enforcement Network, not the IRS, and the penalties for skipping it can be severe.⁴

The second is Form 8938 under FATCA. Joint filers living in the U.S. must file if specified foreign financial assets exceed $100,000 on the last day of the year or $150,000 at any time during the year. For joint filers living abroad, the thresholds rise to $400,000 and $600,000.⁵ Missing the form carries a $10,000 penalty, with up to $50,000 more for continued noncompliance after IRS notification, plus a 40 percent penalty on any related tax understatement.⁶

Getting an ITIN for Your Spouse

Your spouse needs a taxpayer identification number to appear on the return. If they are not eligible for a Social Security Number, apply for an Individual Taxpayer Identification Number using IRS Form W-7. An ITIN is a nine-digit number used solely for federal tax purposes. It does not authorize employment and does not create eligibility for Social Security benefits.⁷

Required Identity Documents

Documentation is the hardest part. The IRS requires original documents or copies certified by the agency that issued them. Notarized copies are not accepted. A valid passport is the simplest route because it proves both identity and foreign status by itself. Without a passport, your spouse needs two documents that together establish identity (with a photograph) and foreign status, such as a national ID card and a birth certificate.⁸

Three Ways to Submit

You have three options for getting the W-7 and supporting documents to the IRS:

Mail the complete package to the IRS ITIN Operations unit in Austin, Texas. The IRS returns original documents after processing, but mailing them is the least attractive option because of the risk of loss or delay.
Visit an IRS Taxpayer Assistance Center (TAC) in person. An IRS employee can review original documents, certify copies, and accept the application on the spot, so your originals stay with you.
Use a Certifying Acceptance Agent (CAA). A CAA is authorized by the IRS to verify identity documents and submit the application on your behalf. You do not need to mail originals or visit an IRS office. Professional fees vary.

Putting the Package Together and Filing

When you apply for the ITIN with the return, mail the whole package to the IRS ITIN Operations address in Austin, Texas, not to the standard filing address for your area. Electronic filing is not available when the ITIN is being requested for the first time. In the SSN field for your spouse on Form 1040, write “APPLIED FOR” to indicate that a W-7 is included.⁹

The package has three parts: the completed Form 1040 listing both spouses, the signed 6013(g) election statement, and the Form W-7 with supporting identity documents. Attach the election statement and the W-7 to the front of the return.

Processing takes time. The IRS estimates about seven weeks for an ITIN application outside tax season, and nine to eleven weeks if you file between January 15 and April 30 or apply from overseas.⁹ The IRS processes the W-7 first, assigns the ITIN, and only then begins processing the return. Any refund is delayed accordingly. Future returns can be e-filed normally once the ITIN is assigned.

Tax Credits You May Lose With an ITIN Spouse

Joint filing with an ITIN-holding spouse unlocks most joint benefits, but some credits require a Social Security Number that an ITIN cannot replace.

The Earned Income Tax Credit requires a work-authorized SSN for everyone in the household, including taxpayer, spouse, and qualifying children. If your spouse has only an ITIN, the EITC is off the table on a joint return.¹⁰

The Child Tax Credit requires each qualifying child to have a work-authorized SSN issued before the return’s due date. A child with only an ITIN does not qualify for the CTC, though you may instead claim the Credit for Other Dependents, worth up to $500. A child who does have an SSN can still qualify for the full CTC even when the ITIN-holding spouse is on the return.¹⁰

When the Election Ends

The 6013(g) election stays in effect until one of four things happens:²

Revocation. Either spouse can revoke the election alone; both do not need to agree. Revocation takes effect as of the first tax year whose filing deadline has not yet passed.
Death. The election ends at the start of the surviving spouse’s next tax year. A surviving spouse who qualifies for the surviving-spouse filing status under IRC Section 2 can continue the election through the end of that qualifying period.
Divorce or legal separation. The election terminates at the beginning of the tax year in which the separation or divorce occurs.
IRS termination. The IRS can end the election if either spouse fails to keep adequate records or provide information needed to determine tax liability.

One detail is worth knowing before you ever make the election: it is once in a lifetime. If the election ends for any reason, neither spouse can ever make a 6013(g) election again, even in a later marriage to a different person.³ The election also automatically suspends for any year in which neither spouse is a U.S. citizen or resident at any point during the year, resuming when one of them regains that status.²

If You Decide Not to Make the Election

Not every couple should elect joint filing. If your nonresident spouse has substantial foreign income or large foreign accounts, the worldwide-income reporting and FBAR/FATCA obligations may outweigh the deduction difference. Without the election, you have two filing options.

Married Filing Separately

This is the default when you are married to a nonresident alien and do not elect. You file on your own income only. The 2026 standard deduction for Married Filing Separately is $16,100, and several credits and deductions phase out more aggressively at this status.¹ You cannot claim your nonresident alien spouse as a dependent.¹¹

Head of Household

If you have a qualifying dependent in your home, Head of Household is usually the better alternative. A taxpayer whose spouse is a nonresident alien at any point during the tax year is treated as unmarried for Head of Household purposes.¹² You must pay more than half the cost of maintaining the home, and a qualifying person (typically a dependent child) must live there more than half the year.³

The 2026 Head of Household standard deduction is $24,150, well above the $16,100 for Married Filing Separately though still below the $32,200 joint deduction.¹ Head of Household also uses more favorable brackets than MFS, and it avoids the worldwide-income and foreign-account reporting that come with the 6013(g) election.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
Office of the Law Revision Counsel. 26 USC 6013 – Joint Returns of Income Tax by Husband and Wife
3
Internal Revenue Service. Nonresident Spouse
4
Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
5
Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets
6
Internal Revenue Service. Summary of FATCA Reporting for US Taxpayers
7
Internal Revenue Service. About Form W-7
8
Internal Revenue Service. Instructions for Form W-7
9
Internal Revenue Service. Individual Taxpayer Identification Number (ITIN)
10
Taxpayer Advocate Service. Valuable Information About Child and Dependent-Related Tax Benefits
11
Internal Revenue Service. International Taxpayers Filing Status If Married to a Nonresident Alien
12
Office of the Law Revision Counsel. 26 US Code 2 – Definitions and Special Rules