The U.S. tax system works differently from every other country in the world except one. Most countries only tax people who live within their borders. The U.S. taxes based on citizenship. That means no matter where you live, no matter where your money comes from, and no matter how long you’ve been gone — if you hold a U.S. passport, the IRS still considers you a taxpayer.
I’m not a tax professional, and nothing in this post is tax advice. What I am is someone who has lived in four countries and watched a lot of Americans make expensive assumptions about their tax situation. This post is designed to give you a clear picture of how the system works — so you know the right questions to ask before you move.
The U.S. Taxes Citizenship, Not Residency
This surprises almost every American I talk to. Most countries operate on a residency-based tax system — if you live there, you pay taxes there. If you leave, you stop. Simple.
The U.S. is one of only two countries in the world that operates on a citizenship-based tax system. The other is Eritrea. That means your obligation to file a U.S. tax return doesn’t end when you board the plane. It follows you.
According to the IRS, U.S. citizens and resident aliens living abroad are generally required to file income tax returns and pay estimated tax in the same way as those residing in the United States — with worldwide income reported regardless of where it was earned.
The key distinction most people miss: filing a return and actually owing tax are two completely different things. Once you understand the tools available to you — the Foreign Earned Income Exclusion, the Foreign Tax Credit, and others — many Americans abroad find their U.S. tax bill is zero.
The Foreign Earned Income Exclusion (FEIE)
The FEIE is the most widely used tax benefit available to Americans living abroad. It allows qualifying U.S. citizens to exclude a significant portion of their foreign-earned income from U.S. federal taxation. The threshold is adjusted annually for inflation and is currently over $130,000 per person.
To qualify, you need to meet two conditions. First, your tax home must be in a foreign country. Second, you must pass one of two tests:
Physical Presence Test
You must be physically present in a foreign country (or countries) for at least 330 full days during any 12-month period. Popular with digital nomads and those who travel frequently.
Bona Fide Residence Test
You must be a genuine resident of a foreign country for an uninterrupted period that includes an entire tax year. Better suited for people who establish a real home abroad rather than moving around.
Important limitation: the FEIE only applies to earned income — wages, salary, and self-employment income. It does not apply to passive income like dividends, interest, capital gains, or rental income. For those income types, you’ll need a different strategy. If you’re still getting your head around the broader picture first, this overview of moving abroad as an American covers the full picture.
To claim the FEIE, you file Form 2555 with your federal tax return. It’s not automatic — you have to elect it. And once you revoke it, you generally can’t use it again for five years without IRS permission.
The Foreign Tax Credit (FTC)
If you’re paying income taxes in your new country of residence, the Foreign Tax Credit allows you to reduce your U.S. tax bill by the amount you’ve already paid abroad — dollar for dollar. This is particularly valuable for Americans living in high-tax countries like Germany, France, or the UK, where local income taxes often exceed what the U.S. would have charged.
Unlike the FEIE, the Foreign Tax Credit can apply to passive income like dividends and interest — income types the FEIE doesn’t cover. Many Americans abroad use both tools in combination: the FEIE to exclude earned income up to the threshold, and the FTC on any remaining income or investment earnings.
The FTC is claimed using Form 1116. The calculation can get complex — especially when you’re dealing with income from multiple countries or different types of income. This is one of the areas where working with a tax professional who specializes in expat taxes pays for itself quickly.
Source: IRS — Foreign Tax Credit
FBAR and FATCA: The Reporting Requirements Nobody Tells You About
Even people who are faithfully filing their tax returns every year often don’t know about FBAR and FATCA — two separate reporting requirements that have nothing to do with whether you owe taxes, but carry serious penalties if ignored.
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FBAR — FinCEN Form 114
If the combined balance of all your foreign bank accounts exceeds $10,000 at any point during the year — even for a single day — you’re required to file an FBAR with the U.S. Treasury’s Financial Crimes Enforcement Network. Note that this threshold is aggregate: three accounts with $4,000 each equals $12,000 total, which triggers the requirement. The FBAR is filed separately from your tax return and is due by April 15, with an automatic extension to October 15. Learn more from the IRS.
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FATCA — Form 8938
FATCA (Foreign Account Tax Compliance Act) has higher reporting thresholds than FBAR and covers a broader range of foreign financial assets — not just bank accounts, but foreign stocks, mutual funds, and other investments. For Americans living abroad, the threshold is $200,000 at year-end or $300,000 at any time during the year (for single filers). Unlike FBAR, Form 8938 is filed with your regular tax return. Many expats end up needing to file both. Learn more from the IRS.
According to Greenback Tax Services, in a recent review of expat tax situations, 50% of Americans living abroad were unaware they were required to file an FBAR. That’s not a small oversight — it’s a significant compliance gap that catches people off guard years into their time abroad.
Sources: FinCEN — FBAR · IRS — FATCA
Key Dates and the IRS Streamlined Program
Americans living abroad get a few additional considerations around tax deadlines that are worth knowing.
Automatic June 15 extension
Americans abroad automatically get an extra two months to file their return — until June 15. No request needed. However, any taxes owed still accrue interest from April 15, so this is a filing extension, not a payment extension.
Further extension to October 15
If you need more time, you can request an additional extension to October 15 by filing Form 4868. FBAR filings also have an automatic extension to October 15.
IRS Streamlined Program
If you’ve been living abroad and haven’t filed U.S. tax returns, don’t panic. The IRS Streamlined Filing Compliance Procedures allow you to catch up by filing three years of returns and six years of FBARs — with penalties waived for non-willful non-filers. This is available to expats who genuinely didn’t know about their obligations.
State taxes may still apply
Some U.S. states have aggressive tax rules that may still apply even after you move abroad — particularly California, New York, and a handful of others. Check your former state’s residency rules before assuming you’re free and clear.
The Streamlined Program is genuinely one of the most useful tools available to Americans who are behind. But it’s only available before the IRS comes looking. Once you’re on their radar, the options narrow considerably.
This Is One Area Where You Really Do Need a Professional
I say this about very few things — because I think a lot of the relocation process can be figured out with the right information and guidance. But expat taxes are genuinely complex, and the stakes for getting them wrong are high enough that this is not the place to wing it.
A regular U.S. accountant or tax preparer likely doesn’t know FBAR requirements, FEIE elections, or the nuances of foreign tax credits. You need someone who specializes specifically in U.S. expat taxation. A few well-regarded options worth looking into:
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Greenback Tax Services
One of the most well-known expat tax firms, specializing exclusively in Americans living abroad. Transparent pricing and a strong reputation in the expat community.
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Bright!Tax
A fully remote CPA firm focused entirely on U.S. expat taxes. Strong reviews from Americans across a wide range of countries and income types.
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Taxes for Expats
CPA-reviewed returns with a focus on Americans abroad. Good option for more complex situations involving multiple countries or business structures.
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MyExpatTaxes
A more affordable DIY-friendly software option for Americans with straightforward tax situations, with expert review available as an add-on.
Before you get into the details with a tax professional, it also helps to have a clear picture of your overall situation — which country you’re moving to, how you earn your income, and what your financial picture looks like. That’s exactly what I help people think through in an Exit Strategy Call.
Ready to figure out your actual situation?
Taxes are just one piece of the picture. In an Exit Strategy Call, we’ll go through your specific circumstances — income, timeline, visa options — and figure out what your real next step is.
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