Navigating US Taxes When Married to a Non-Citizen

For US citizens or resident aliens married to a non-US citizen, navigating the complexities of US tax obligations can feel like a daunting task. The good news is that the IRS provides various pathways, but understanding which one applies to your unique situation is crucial. This guide from TheTaxBooks aims to demystify the process, helping you understand your options and responsibilities.

Understanding Your Filing Status Options

Your marital status with a non-US citizen spouse significantly impacts your tax filing options. Generally, two primary approaches are available: filing separately or, under certain conditions, filing jointly.

Married Filing Separately (MFS)

This is often the default or simplest option when your spouse is a non-resident alien. If you choose this status:

  • Only the US citizen or resident alien’s income is reported to the IRS. Your non-resident alien spouse’s income earned outside the US (and not effectively connected with a US trade or business) is generally not subject to US tax and does not need to be reported on your return.
  • Tax benefits may be limited. You will not be able to claim your non-resident alien spouse as a dependent, and certain tax credits and deductions may be reduced or unavailable.
  • Each spouse files their own return. You will file as “Married Filing Separately,” and your non-resident alien spouse will not file a US tax return unless they have US-sourced income that requires it.

Married Filing Jointly (MFJ) – The Non-Resident Alien Election

Perhaps the most significant and often beneficial option is the ability to elect to treat your non-resident alien spouse as a US resident alien for tax purposes. This allows you to file as “Married Filing Jointly.”

To make this election:

  • Both spouses must agree. Both you and your non-resident alien spouse must sign the tax return to signify this election.
  • Worldwide income reporting. If you make this election, your non-resident alien spouse will be treated as a US resident alien for the entire tax year. This means their worldwide income, from all sources, becomes subject to US taxation. This can significantly increase the complexity of your tax situation.
  • Potential tax benefits. Filing jointly often leads to a lower overall tax liability due to more favorable tax brackets, access to certain deductions (like the standard deduction or itemized deductions), and various tax credits that might not be available when filing separately.
  • ITIN requirement. Your non-resident alien spouse must have or apply for an Individual Taxpayer Identification Number (ITIN) to be included on a joint return.

It’s important to weigh the benefits of potential tax savings against the added complexity of reporting your spouse’s worldwide income.

The Importance of an Individual Taxpayer Identification Number (ITIN)

An Individual Taxpayer Identification Number (ITIN) is a tax processing number issued by the U.S. Internal Revenue Service (IRS). The IRS issues ITINs to individuals who are required to have a U.S. taxpayer identification number but who do not have, and are not eligible to obtain, a Social Security number (SSN).

For spouses of US citizens or resident aliens, an ITIN is essential if you plan to:

  • File a joint return (MFJ election): As mentioned, your non-resident alien spouse needs an ITIN to be included on a joint tax return.
  • Claim certain tax benefits: Even if you file MFS, in some cases, an ITIN might be needed to claim certain credits that require information about your spouse, even if they aren’t directly filing.

The ITIN application process (Form W-7) can be intricate. TheTaxBooks assists individuals with ITIN applications, ensuring a smooth and accurate submission to the IRS.

Key Considerations for Joint Filers with a Non-Citizen Spouse

If you choose to file jointly by electing to treat your non-resident alien spouse as a resident, there are several critical factors to consider:

Worldwide Income Reporting

This is a fundamental consequence of the MFJ election. Every dollar your non-resident alien spouse earns, regardless of where it’s earned, will be considered taxable income by the IRS. This includes:

  • Foreign employment income
  • Foreign business income
  • Foreign investment income (interest, dividends, capital gains)
  • Rental income from foreign properties

You may be able to claim the Foreign Tax Credit or the Foreign Earned Income Exclusion to offset double taxation, but careful planning and accurate reporting are essential.

Foreign Bank Account Reporting (FBAR) & FATCA

If your joint assets, including those held by your non-citizen spouse, meet certain thresholds, you may have additional reporting requirements:

  • FBAR (FinCEN Form 114): If the aggregate value of foreign financial accounts (bank accounts, brokerage accounts, etc.) exceeds $10,000 at any point during the calendar year, an FBAR must be filed with the Financial Crimes Enforcement Network (FinCEN). This applies even if the accounts are solely in your non-citizen spouse’s name.
  • FATCA (Form 8938): The Foreign Account Tax Compliance Act (FATCA) requires US persons to report certain foreign financial assets if their value exceeds specific thresholds. This reporting is done on Form 8938, Statement of Specified Foreign Financial Assets, filed with your tax return.

Failure to comply with FBAR and FATCA reporting can result in significant penalties.

Social Security and Medicare Taxes

If your non-resident alien spouse works in the US, their income may be subject to Social Security and Medicare taxes, even if they are exempt from income tax under a tax treaty. However, if they are not working in the US, they generally would not contribute to these systems.

When to Seek Professional Guidance

The tax implications of being married to a non-US citizen can be highly complex, especially with the worldwide income reporting and various international reporting requirements. Attempting to navigate these rules without professional guidance can lead to errors, missed opportunities for tax savings, and potential penalties.

Whether you’re considering the non-resident alien election, need assistance with an ITIN application, or are grappling with FBAR and FATCA reporting, a qualified tax professional specializing in international taxation is invaluable.

To learn more about how you can reduce your taxes and save money, check out the helpful resources on our blog or contact us today to schedule a consultation.

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