Do US citizens file taxes living abroad? The honest answer
America taxes on citizenship, not residency — so your filing obligation follows you everywhere. Here's what that means, and what happens when two countries both call you a resident.
Yes. US citizens must file a federal tax return every year no matter where they live, because the United States taxes its citizens on citizenship, not residency. That is the sentence that surprises almost every American who moves abroad: your obligation to file follows you to Lisbon, Bogotá, Singapore or anywhere else — even in a year you set foot on US soil zero times, and even if you owe nothing.
Most owners and remote workers we onboard arrive convinced that leaving the country ends the relationship with the IRS. It doesn’t. Filing and paying are two separate questions, and the gap between them is where the real planning happens. In our experience, the cross-border employees and owners are always the ones who arrive with the messiest assumptions. Let’s clean them up.
Filing is not the same as paying
A US citizen abroad files the same Form 1040 as someone in Ohio. For the 2025 tax year, you must file if your gross income exceeds $15,750 (single) or $31,500 (married filing jointly) — the same thresholds as everyone else, plus a few lower triggers (self-employment income over $400, for instance).
But filing does not mean owing. Two mechanisms exist specifically to stop the same dollar from being taxed twice:
- The Foreign Earned Income Exclusion (FEIE) — Form 2555 — lets you exclude up to $130,000 of foreign earned income for 2025, rising to $132,900 for 2026, per qualifying person. Married couples who both work abroad can each claim it.
- The Foreign Tax Credit (FTC) — Form 1116 — credits the income tax you already paid to your host country, dollar for dollar, against your US bill.
For an American earning under the exclusion limit in a low-tax country, the FEIE can drive the US federal income tax to $0 — but only if you file Form 2555 to claim it. The exclusion is never automatic. Skip the form and you don’t get the benefit.
The day-count tests that unlock the exclusion
The FEIE has a gate: you must pass one of two tests. The Physical Presence Test is a strict day count — 330 full days outside the US in any 12-month period. The Bona Fide Residence Test is about substance — establishing a genuine home abroad for a full tax year.
A practical note on the calendar: Americans abroad get an automatic two-month extension, so the filing deadline is June 15 rather than April 15. Any tax actually owed is still due April 15 to stop interest from running.
Living abroad doesn't end your filing duty — it changes the math. You still file every year; the goal is to legally owe zero.
When two countries both claim you
This is the part the generic guides skip. Move to a country that taxes on residency — most of them — and you can become a tax resident there while remaining a citizen-taxpayer here. Both governments now have a legitimate claim on your worldwide income. That’s dual tax residence, and it’s resolved by a tax treaty tie-breaker: a ranked sequence of tests (permanent home, then center of vital interests, then habitual abode, then nationality) that assigns you to one country.
Here’s the trap. Nearly every US treaty contains a savings clause — a provision that lets the United States tax its own citizens as if the treaty didn’t exist. So while a green-card holder might use the tie-breaker to be treated as a nonresident and file Form 1040-NR, a US citizen generally cannot use it to escape worldwide US taxation. The tie-breaker reassigns residency for the other country’s purposes; the savings clause keeps you on the hook for the US side regardless.
What the citizen abroad does instead is stack the relief tools: claim the FEIE on earned income, then apply the Foreign Tax Credit to whatever the exclusion doesn’t cover — passive income like dividends, interest, rent and capital gains is never eligible for the FEIE and stays fully taxable unless the FTC offsets it.
The reporting forms that have nothing to do with how much you owe
Even at a $0 tax bill, two information returns can still bite:
- FBAR (FinCEN Form 114) — required if your foreign financial accounts exceed $10,000 in aggregate at any point in the year. Not $10,000 each. Combined.
- Form 8938 (FATCA) — a separate, higher-threshold asset-reporting form filed with your 1040.
If you take a treaty position — for example, claiming foreign residency under a tie-breaker on income items over $100,000 — you generally disclose it on Form 8833. Missing it carries a $1,000 penalty per position, even when the underlying treaty benefit was valid. And one more thing people miss: federal treaties don’t bind the states. California, New Jersey and Pennsylvania, among others, generally ignore treaty benefits, so you can zero out your federal bill and still owe state tax on the same income.
The good news: if you didn’t know you had to file and you’re years behind, the IRS Streamlined Filing Compliance Procedures exist to catch you up without the full penalty stack — as long as you come forward before the IRS contacts you first.
What we tell clients
We tell every American abroad the same thing: the filing obligation is non-negotiable, but the tax bill usually isn’t — with the FEIE, the Foreign Tax Credit and clean account reporting, most of our cross-border clients legally owe the US nothing. The mistakes that cost money are skipped forms (Form 2555, FBAR, Form 8833), not missed dollars. If you want us to map your situation — which test you pass, whether the exclusion or the credit serves you better, and what your state still wants — book a call and bring last year’s return plus a list of every foreign account you hold.
