U.S. Expat Taxes: Filing Rules for Americans Abroad
Reviewed by the Fairlight Accounting cross-border tax team — U.S. & Canadian Tax Desks
U.S. expat taxes are the annual U.S. federal filing obligations that follow U.S. citizens and green-card holders wherever they live. The United States taxes its citizens on worldwide income regardless of residence, so moving abroad changes how you file — not whether you file.
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Do I still have to file a U.S. return if I live abroad?
Yes, if your worldwide income is above the standard filing threshold for your status — and for most working adults it is. Residency in another country, paying tax there, or holding dual citizenship does not switch off the U.S. obligation. The one way out is formally renouncing citizenship or surrendering a green card, which has its own exit-tax rules.
Filing and owing are different things. A large share of expats file every year and owe nothing, because the exclusions and credits below absorb the U.S. tax. The return still has to be filed to claim them.
What makes expat returns different from a domestic return?
Three additions sit on top of the ordinary Form 1040:
- Form 2555 — the foreign earned income exclusion (FEIE). Excludes wages and self-employment income earned abroad up to an annual limit (adjusted for inflation each year), plus a foreign housing amount, if you meet a residence or physical-presence test.
- Form 1116 — the foreign tax credit. Credits income tax paid to another country against U.S. tax on the same income. In high-tax countries this alone often brings the U.S. bill to zero.
- Foreign account and asset reporting. The FBAR (FinCEN Form 114) if your foreign accounts together exceed $10,000 at any point in the year, and Form 8938 at higher thresholds that are more generous for people living abroad. These are disclosures, not taxes — but the penalties for skipping them are severe.
Depending on your life abroad, other forms may apply: Form 8833 for treaty positions, Form 3520 for foreign trusts and large gifts, Form 8621 for foreign mutual funds, and Form 5471 if you own a foreign company.
When is the deadline for Americans abroad?
If you live outside the U.S. on April 15, you get an automatic two-month extension to June 15 to file. You can extend further to October 15 with Form 4868, and in some cases to December 15 by letter. Two cautions: interest on any tax owed still runs from April 15, and the FBAR has its own deadline (April 15, automatically extended to October 15).
Does my state still want a return?
Sometimes. Most states stop taxing you once you establish residence abroad, but a few hold on unless you clearly cut ties — selling or renting out a home, moving your driver's license and voter registration, closing state accounts. The last state you lived in determines the rules, and it is worth settling in your first year abroad.
What happens if I haven't filed for years?
Usually less than people fear. The IRS Streamlined Filing Compliance Procedures let expats who didn't know they had to file catch up with three years of returns and six years of FBARs, with penalties waived when the failure wasn't willful. Many expats owe little or nothing even for the catch-up years once the exclusion and credits are applied.
Frequently asked questions
I pay tax where I live. Why does the U.S. want a return too?
Because U.S. tax is based on citizenship, not residence. The foreign tax credit and the exclusion exist precisely to prevent paying twice; the return is how you claim them.
My income is below the exclusion limit. Do I still file?
Yes. The exclusion is elected on the return — it isn't automatic. Skip the return and the IRS sees unreported income, not excluded income.
Do I have to report my foreign bank accounts even if they earn nothing?
If the combined balance of all foreign accounts passed $10,000 at any moment in the year, the FBAR is due regardless of income. Form 8938 has its own, higher thresholds.
Can I file jointly with a non-U.S. spouse?
You can elect to treat a nonresident spouse as a U.S. resident and file jointly, which brings their worldwide income into the U.S. return. Whether that helps depends on their income and the country's tax rate — it is a decision to model, not default to.
Next step
Fairlight Accounting handles U.S. domestic, cross-border (U.S.–Canada), and international tax returns, plus bookkeeping, payroll, and CFO advisory. If you live abroad and aren't sure what your U.S. return should look like — or haven't filed in a while — our U.S. Tax Desk can map it with you. See pricing or book a free fit call.
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