The rule that changes everything
The United States is one of only two countries on earth that taxes based on citizenship rather than residence. If you hold a U.S. passport or a green card, you file a federal tax return on your worldwide income every year — whether you live in Lisbon, Bali or Dubai, and whether or not you owe anything.
That single fact is why a host country's "tax benefit" never tells the whole story for an American. A 0% local rate doesn't make you tax-free; it simply means the U.S. has the first and last word on that income.
The tax-benefit paradox — The lower your local tax, the more exposed you can be to U.S. tax. Foreign tax you actually pay can be credited against your U.S. bill; if you pay little or nothing locally, there's nothing to credit, so the Foreign Earned Income Exclusion becomes your only real shield — and it has a ceiling.
Your three shields against double taxation
Americans abroad rarely pay tax twice on the same income — but only if they actively claim the right relief. These are the main tools:
Form 2555 — excludes that much of your earned income from U.S. tax if you pass a residency test.
Form 1116 — credits foreign income tax you actually paid against your U.S. bill, dollar for dollar.
On top of the FEIE — excludes qualifying housing costs above a base of ~$21,264 (higher caps in costly cities).
Where one exists, you pay Social Security to only one country — protecting self-employed nomads from double SE tax.
The Foreign Earned Income Exclusion (FEIE)
The FEIE (claimed on Form 2555) lets you exclude up to $132,900 of earned income for 2026 (it was $130,000 for 2025), per qualifying person — so a married couple who both work abroad can exclude well over $260,000 combined. To qualify you must pass one of two tests:
- Physical Presence Test — be physically present in a foreign country for at least 330 full days in any rolling 12-month period. Best for genuinely mobile nomads.
- Bona Fide Residence Test — be a genuine resident of a foreign country for an uninterrupted period covering a full calendar year. Easier to evidence with a long-stay visa and a lease.
Crucially, the FEIE only covers earned income — salary, wages and self-employment income for work performed abroad. It does not shelter investment income, dividends, capital gains, rental income or pensions, and it does nothing for self-employment tax (below).
The Foreign Tax Credit — and when it beats the FEIE
The Foreign Tax Credit (Form 1116) gives you a dollar-for-dollar U.S. credit for income tax you actually paid to a foreign government. In a higher-tax country it frequently eliminates your U.S. liability entirely.
You generally cannot apply both the FEIE and the FTC to the same income, so the choice matters. As a rule of thumb: in low- or no-tax destinations the FEIE wins; in higher-tax destinations the FTC often wins and has a bonus — because it doesn't zero out your "earned income," it can preserve access to the refundable Child Tax Credit and IRA contributions that the FEIE can disqualify you from.
The self-employment tax trap
Here's the catch that surprises most freelance nomads: the FEIE reduces your income tax, but U.S. self-employment tax of 15.3% (Social Security + Medicare) is calculated separately and still applies to your net self-employment earnings — even if every dollar is excluded by the FEIE.
The only relief is a totalization agreement, which assigns your Social Security contributions to just one country. The U.S. has agreements with around 30 nations — including Spain, Portugal, Italy and Greece among the destinations on this site — but not with Croatia, Estonia, Thailand, Indonesia, the UAE, Colombia or (in force) Mexico. In those countries a self-employed American can owe the full 15.3% to the U.S. regardless of local rules.
Tax treaties & the "saving clause"
The U.S. has income-tax treaties with many countries, but nearly all contain a saving clause that lets the U.S. keep taxing its own citizens as if the treaty didn't exist. So while treaties help with sourcing rules and certain income types, Americans generally cannot use them to escape U.S. tax — and a treaty never removes the FBAR and FATCA filing duties below.
Foreign account reporting: FBAR & FATCA
Two information filings catch out almost everyone, because they're required even when you owe no tax:
- FBAR (FinCEN Form 114) — required if the combined balance of your foreign financial accounts exceeds $10,000 at any point in the year. Penalties for non-filing are severe.
- FATCA (Form 8938) — required if your foreign financial assets exceed the thresholds for taxpayers abroad (broadly $200,000 single / $400,000 married at year-end).
Don't forget state taxes
Leaving the country doesn't automatically end your state tax obligations. "Sticky-domicile" states — notably California, New York, Virginia and New Jersey — can continue to treat you as a resident and tax your worldwide income (including amounts you excluded federally) until you take concrete steps to break domicile. Plan your exit from these states before you move.
How it plays out by destination
For the tax-incentive visas featured on this site, here's the U.S.-side reality:
| Country | Local tax angle | What it means for your U.S. taxes |
|---|---|---|
| 🇦🇪United States Arab Emirates | 0% personal income tax | Nothing to credit — the FEIE is your only shield. Income above ~$132,900, plus investment income, is fully U.S.-taxable. No totalization agreement, so self-employed owe 15.3% SE tax. |
| 🇭🇷Croatia | No tax on foreign income | Same as a zero-tax country for U.S. purposes: lean on the FEIE. The 18-month cap can make the bona-fide-residence test hard — most rely on the 330-day physical-presence test. |
| 🇬🇷Greece | 50% income-tax reduction | You still pay Greek tax on the other half, which generates a Foreign Tax Credit. A FEIE + FTC mix usually works best. |
| 🇪🇸Spain | Beckham Law — 24% flat | The 24% you pay Spain is creditable via the FTC. You can't apply both FEIE and FTC to the same dollars, so model which wins. |
| 🇵🇹Portugal | IFICI / NHR 2.0 regime | Favourable Portuguese rates still leave some tax to credit; combine FEIE for the first ~$132,900 with FTC above it. |
| 🇮🇹Italy | Impatriate regime | Large Italian exemptions mean less foreign tax to credit — the FEIE does much of the heavy lifting on earned income. |
| 🇹🇭Thailand | Remittance-based tax | Thailand may tax only income you bring in; the U.S. still taxes everything. Use the FEIE, and the FTC for whatever Thai tax you pay. |
A smart-moves checklist
Confirm you must file
If you're a U.S. citizen or green-card holder earning above the filing threshold, you file a 1040 every year — living abroad doesn't change that.
Qualify for the FEIE
Pass the physical-presence test (330 full days abroad in any 12 months) or the bona-fide-residence test (a full calendar year as a genuine resident).
Choose FEIE vs. FTC
In low/no-tax countries the FEIE is usually best; in higher-tax countries the Foreign Tax Credit often wipes out U.S. tax and preserves credits like the refundable Child Tax Credit.
Handle self-employment tax
Check whether a totalization agreement covers your country. If not, budget for 15.3% U.S. self-employment tax on net earnings.
File information reports
Lodge the FBAR (FinCEN 114) if foreign accounts exceed $10,000 combined, and Form 8938 if your foreign assets cross the FATCA thresholds.
Break state residency
'Sticky' states (California, New York, Virginia, New Jersey) tax by domicile — take active steps to sever residency before you go.
The bottom line
Working in your favour
- FEIE can exclude $132,900 of earned income (per spouse)
- FTC often eliminates U.S. tax in higher-tax countries
- Foreign Housing Exclusion adds further relief
- Totalization agreements can erase double Social Security tax
Watch out for
- You always file a U.S. return, even at 0% local tax
- Self-employment tax (15.3%) survives the FEIE
- Treaty 'saving clause' blocks most treaty relief for citizens
- Sticky states may keep taxing your worldwide income