Married to a Non-US Citizen? Tax Rules Every US Expat Should Know

Marriage changes more than your personal life — it changes how you file US taxes.

For US expats married to non-US citizens, the rules are especially nuanced.

Filing Status Options

US expats married to non-US citizens typically choose between:

• Married Filing Separately

• Married Filing Jointly (by election)

Each option has major tax and reporting consequences.

For general expat context, see:
👉 /complete-guide-us-expat-taxes

Joint Filing: Pros and Cons

Electing to file jointly can:

• Lower tax rates

• Increase deductions

But it also means:

• Worldwide income of both spouses is reportable

• Foreign assets become reportable

• FBAR and FATCA exposure may increase

This decision should never be automatic.

Separate Filing Considerations

Filing separately:

• Limits disclosure of the non-US spouse

• Often increases tax liability

• Still requires careful reporting

Some credits and deductions are restricted.

Foreign Accounts and Spousal Assets

Joint or shared accounts may trigger:

• FBAR reporting

• FATCA Form 8938

Even if the account primarily belongs to the non-US spouse.

Learn more:
👉 /fbar-foreign-bank-account-reporting-expats
👉 /fatca-form-8938-expats

Common Mistakes Couples Make

Typical issues include:

• Filing jointly without understanding consequences

• Underreporting foreign assets

• Ignoring long-term compliance impact

Mistakes often compound over time.