Do I have to file a U.S. tax return if my only income is foreign and I pay tax abroad?
Yes. U.S. citizens and green card holders file a Form 1040 on worldwide income regardless of source or where it was taxed. Foreign tax paid is relieved through the Foreign Earned Income Exclusion or the Foreign Tax Credit, but the filing obligation itself does not disappear just because all income was earned and taxed abroad.
Why U.S. citizenship-based taxation reaches you anywhere:
- The U.S. taxes on citizenship and residency, not territory
- Eritrea enforces a 2% diaspora tax on citizens abroad (U.S. Department of State), and Myanmar has taxed citizens on worldwide income since October 2023. North Korea and Cuba are sometimes cited as well, though no authoritative tax source has confirmed active enforcement of citizenship-based taxation in either country.
- The obligation continues until you renounce citizenship or abandon green card status
What still eliminates or reduces U.S. tax:
| Relief method | Best for |
| Foreign Earned Income Exclusion (Form 2555) | Low-tax country, earned income under Annual FEIE exclusion |
| Foreign Tax Credit (Form 1116) | High-tax country, or unearned income |
| Foreign Housing Exclusion/Deduction | Expensive foreign cities |
| Treaty provisions (Form 8833) | Specific income types where treaty offers better treatment |
What filing always accomplishes:
- Starts the statute of limitations (3 years for most issues, 6 years for major understatements)
- Preserves eligibility for FEIE and FTC
- Avoids late filing and failure-to-file penalties
- Creates a paper trail if the IRS questions your position later
Accidental Americans and long-absent citizens who have never filed can use the Streamlined Foreign Offshore Procedures to catch up without penalties if the non-filing was non-willful.
For more on expat filing, see our U.S. Citizen Abroad Taxes guide.
Last updated on April 29, 2026
