The United States taxes its citizens on their worldwide income, regardless of where they live, bank, or earn. If you were born in Ohio, moved to Spain fifteen years ago, and earn every dollar you have ever earned from Spanish clients paid in euros, the Internal Revenue Service expects a full US tax return every single year, no exceptions. Your Spanish bank is required to report your account and transactions to the US government under FATCA. The system does not care that you have not lived in the United States since flip phones were cool.
This is citizenship-based taxation, and it is the reason a US passport comes with a lifetime tax bill attached. Almost no other country has the same setup, and understanding how it works in practice — and what tools can bring the US bill close to zero without renouncing — is the difference between an American life abroad that flows smoothly and one that bleeds money without you noticing.
Or watch the deep dive here:
What citizenship-based taxation is
Most countries tax based on residency. A Canadian moves to Portugal, becomes a Portuguese tax resident, Canada stops taxing them. Clean and simple. The United States does not work that way. Americans are taxed on worldwide income for as long as they have a US passport (or, for green-card holders, for as long as they retain long-term US resident status). Where you live, where you earn, even where you bank, all irrelevant. Your citizenship is the trip-wire.
Out of roughly 195 countries, only two use citizenship-based taxation: the United States and Eritrea, a small country in East Africa that most people cannot find on a map. Hungary has a few citizenship-taxation elements at the edges, but nowhere near the reach the American system has. That is not a small club to be in.
Who it pulls in
This is where citizenship-based taxation trips people up. It is not just the handful of jet-setting expats you might picture. Three large groups are inside the net.
1. Americans who moved abroad and built a life somewhere else
Millions of them. They file a US tax return every year, and many owe little or no US tax after credits and treaties. This is probably who you pictured first, and it might be you or future-you.
2. Accidental Americans
People born on US soil to foreign parents who left as babies and never went back. Or people born abroad to at least one American parent who were granted US citizenship at birth and may have never even set foot in the country. Under US law, they are US citizens with US tax obligations. Many discover their status only when a foreign bank asks their nationality and refuses to open an account for them.
3. Long-term US green-card holders
This is the one that blindsides people. If you were a green-card resident in eight of the last fifteen years, the US treats you as a long-term resident and a "US person" for tax purposes. You are pulled into the same net as an American citizen. Letting the green card lapse or moving back to your original country does not end the US tax obligation on its own. There is a formal step required to end long-term resident status, and skipping that step can cost tens of thousands or millions over time.
Why most Americans abroad owe very little US tax
Fair warning: this section is the reason "just leave the US" is bad advice from armchair experts. The US tax system for Americans abroad is stacked with tools that offset the bill. Used well, they can bring your US tax obligation close to zero.
- Foreign Earned Income Exclusion (FEIE). Shields your first $135,000 of earned income from US tax in 2026 (the threshold rises every year with inflation). You have to pass either the physical-presence test (330 days abroad in a 12-month period) or the bona-fide-residence test.
- Foreign Tax Credit (FTC). Offsets your US tax bill dollar-for-dollar with the tax you already pay wherever you live. If you pay $40,000 of local income tax in Spain, that reduces your US bill by $40,000 up to the amount of US tax on the same income.
- Double-tax treaties. Between the United States and most developed countries, treaties address which country has primary taxing rights on which income category. The US-France treaty is famously favorable for American retirees. The US-Portugal, US-Spain, US-Italy, US-Germany, and US-UK treaties all provide meaningful relief.
Stack these tools and a lot of Americans abroad owe close to zero in the United States each year. The bill is not usually the problem. The paperwork is.
Where the pain lives: FATCA and the banking problem
The pain of citizenship-based taxation lands in two places most people don't anticipate.
Higher earners pay both sides. If you earn well above the FEIE ceiling and live in a high-tax country, you pay a substantial local tax bill AND may owe the US on the delta on top. The FEIE covers earned income; investment income, business income, and capital gains follow different rules and often flow through with less relief than salary does.
FATCA and the banking freeze-out. The Foreign Account Tax Compliance Act, signed into law under the Obama administration, forces foreign banks to identify American account-holders and report their accounts to the IRS every year. The compliance burden is significant, and thousands of foreign banks around the world decided Americans are not worth the paperwork. They close existing accounts owned by Americans and refuse to open new ones. You can be a centimillionaire in Geneva or a decamillionaire in Bangkok and get politely turned away at the counter for owning the wrong passport. The tax bill is manageable. Getting your money into a bank account can be materially harder.
Renunciation and the exit tax
The paperwork is the slow bleed. The sharp pain lands when you try to cut the cord for good. Renunciation of US citizenship is the exit door, and the exit door has a toll booth attached.
Two hard prerequisites
To formally renounce, you must already have a second citizenship somewhere else. The US does not let you renounce into statelessness. That means a Plan B — either citizenship-by-investment somewhere (Caribbean CBIs, Malta, Vanuatu, Turkey) or naturalization somewhere over time (Argentina, Uruguay, Portugal, France, and so on) — needs to be in hand or credibly in progress before renunciation is even a conversation.
The exit tax
The second prerequisite is the exit tax, which hits a category the tax code calls "covered expatriates". You become one if you trip any of these three wires on the day you leave:
- Net worth $2 million or more. That threshold has not moved in years.
- Five-year average US income tax above $211,000 (the 2026 figure; it moves each year). This is tax paid, not income earned.
- Cannot certify five clean years of US tax filings. If you miss this certification, you are treated as a covered expatriate regardless of net worth or income.
If any of those apply, the IRS pretends you sold everything you own the day before you renounced. Real estate, stocks, businesses, crypto, all of it marked to market. The gain above roughly $900,000 in 2026 gets taxed at capital-gains rates. Retirement accounts are treated as cashed out on the spot. And there is a nasty tail on top: gifts or inheritance a covered expatriate later leaves to family back in the United States can be hit at 40%, paid by the recipient.
Most people who renounce owe substantial exit tax because they crossed the $2M net-worth line long ago. If this is you, planning starts years before, not weeks before. Renunciation is a five-to-ten-year calendar exercise for anyone with meaningful assets.
Four moves to reduce the impact without renouncing
Renunciation is one path. The other four are less dramatic and available to almost everyone.
1. Get compliant and stay filed
If you are behind on US returns because you didn't realize the rules applied to you, the IRS has a catch-up path called the Streamlined Procedure. It lets many people fix missed years without penalties, provided you can certify the non-filing was not willful. Get compliant before you do anything else, because every subsequent move assumes clean filings.
2. Use every credit and treaty you are owed
The FEIE, the FTC, and any bilateral tax treaty stack together. Used well by a competent cross-border CPA, most Americans abroad owe close to zero to the United States while the annual filing grinds on. Where this breaks down: choosing the wrong jurisdiction. If you move to Spain (worldwide taxation at rates that peak near 47%) or to France or Germany, you pay the local high tax and may owe the US on the delta as well. Choose a tax-friendly jurisdiction and the math flips.
3. Choose a tax-friendly jurisdiction deliberately
Not every country abroad reduces your total tax bill. The ones that do fall into three categories:
- Territorial-tax countries (Costa Rica, Uruguay, Panama, Paraguay) tax only local-source income. Foreign salary, foreign dividends, foreign capital gains stay outside the local tax net.
- Remittance-based systems (Malta, historically Ireland for non-doms) tax only what you bring into the country. Foreign income left offshore stays offshore.
- Non-dom special regimes (Cyprus, Greece 7% pensioner, Italy €200K flat) grant favorable treatment on foreign income for a defined window, often ten to fifteen years.
Pick badly and you can owe more tax in your second country than you paid in the United States. Every one of these regimes has technical qualification rules that need to be met before you rely on them.
4. Structure years before you exit
If renunciation is even a maybe someday, the structuring happens in the calendar years before, not the week of. Second citizenship in hand (or credibly in progress). Business ownership repositioned. Retirement accounts optimized. Real estate reviewed. A specialist cross-border tax advisor is the right conversation, not a general CPA and not this article.
What is (maybe) changing in 2026
For decades, citizenship-based taxation was a fact of life that nobody in Washington seriously wanted to touch. That may be shifting.
Americans abroad have become a large enough voting bloc to move political attention. During the 2024 campaign, President Trump said in plain words that he supports ending citizenship-based taxation and the double taxation of Americans abroad. That was a large promise.
The question is what has reached paper since. Congressman Darren LaHood introduced the Residence-Based Taxation for Americans Abroad Act. If it passed, a qualifying American abroad could elect to be treated as a non-resident of the US for tax purposes without renouncing anything. You would owe US tax only on US-source income (say, rent from a rental property you retained in the States) and nothing on foreign salary or foreign investments. It would also give relief from FATCA reporting and from the FBAR (Foreign Bank Account Report).
Sounds great. It is not law. It has not gained much traction in Congress. It was left out of the big 2025 tax package everyone was watching. It is currently being rewritten with Indiana Senator Todd Young for another attempt. Even the ideal version keeps the US estate and gift tax on your worldwide assets, so it would not fully cut the cord.
The right posture on this: plan for the law as it reads today. Treat any improvement as icing on the cake, not as a load-bearing assumption in your Plan B. A campaign line is not a statute.
One small piece of concrete news: in April 2026 the government cut the fee to formally renounce US citizenship from about $2,500 back down close to $450, roughly what it was in 2010. Most people considering renunciation are decamillionaires or centimillionaires for whom this is negligible, but it is worth flagging.
How to think about this
Two camps of readers usually reach this point.
If you are seriously considering cutting ties, the exit tax and the second-citizenship requirement mean you start years earlier than you think and you get proper cross-border tax advice. The Freedom Files team is jurisdiction-agnostic — we do not earn more if you pick one program over another, and we will point you at the residency or citizenship route that fits your family and your assets. If you want a Plan B either way — a second residency that turns into citizenship over time, or citizenship directly via investment — we work with vetted counsel in every country we cover.
If you are simply weighing several options or are not sure what fits, book a Freedom Consult. If you already know which program fits and you just want your questions answered, a free 15-minute call may be enough. Either way, we won't push a program that isn't right for you.
