For US citizens, there is no truly tax-free country. The United States taxes its citizens on worldwide income wherever they live, so an American who moves to Dubai, the Bahamas or Monaco still files a US federal return every year. What the move changes is the second layer: the new country does not add its own income tax on top.
That still matters. Americans abroad can exclude up to $132,900 of foreign earned income in 2026, and a person who cuts ties with their US state may stop paying state income tax. But investment income, self-employment tax and US reporting duties continue as before.
This guide explains citizenship-based taxation first, then sets out what a zero-tax country does and does not change, and covers the two real exceptions: Puerto Rico and renunciation.
Key takeaways
- US citizens and green card holders are taxed on worldwide income wherever they live, and the filing duty continues abroad.
- The foreign earned income exclusion covers up to $132,900 of earned income per qualifying person in 2026. It does not cover dividends, interest, capital gains or rent.
- The exclusion does not reduce self-employment tax, and the US has no social security agreement with most zero-tax countries.
- Bona fide residents of Puerto Rico can exclude Puerto Rico-source income from federal tax, which makes it the main location-based exception.
- Only renouncing citizenship ends US tax residence for a citizen. It is permanent and can trigger an exit tax.
How citizenship-based taxation works
The IRS states that US citizens and resident aliens living abroad are taxed on worldwide income, generally under the same rules as people living in the United States. The filing thresholds are the same. The main practical differences are an automatic two-month extension, which moves the due date to June 15 for calendar-year filers, and a set of reliefs that only apply if a return is filed.
On top of income tax, Americans abroad have information reporting duties. A foreign bank account report (FBAR) is required when foreign accounts together exceed $10,000 at any point in the year. Form 8938 applies above higher thresholds for people living abroad. Our guide to FBAR and FATCA covers both, and the broader history is in our explainer on citizenship-based taxation.
Tax treaties do not change this much. US treaties contain a 'saving clause' that lets the United States tax its own citizens as if the treaty did not exist, with limited exceptions.
What moving to a zero-tax country changes
There is no foreign tax layer. In a high-tax country, an American usually pays local tax and then uses foreign tax credits to reduce US tax, often to zero. In a zero-tax country, there is no local tax, so the US tax is the whole bill. This means a zero-tax country does not always produce a lower total than a high-tax one with a generous treaty; it depends on the income mix.
Earned income can be excluded. The foreign earned income exclusion (FEIE) lets qualifying taxpayers exclude foreign earned income up to $132,900 for 2026, up from $130,000 for 2025, according to KPMG's summary of the IRS inflation adjustments. A married couple who both qualify can each claim it. To qualify, a person must be a bona fide resident of a foreign country for a full tax year or be physically present abroad for at least 330 full days in any 12-month period, as the IRS FEIE page explains. A separate housing exclusion or deduction can add to it.
State income tax may stop. A person who gives up domicile in their former state may no longer owe state income tax. Some states look closely at remaining ties, such as a home, a driver's license, voter registration or family, before they accept that residence has ended. The detail is in our checklist for moving out of the US.
What moving does not change
Investment income stays taxable. Dividends, interest, capital gains (including crypto) and rental income are not earned income, so the FEIE does not cover them. In a zero-tax country, there are also no foreign taxes to credit against them.
Self-employment tax continues. The IRS notes that the exclusion does not reduce self-employment tax. The United States has totalization agreements with about 30 countries, mostly in Europe plus Canada, Australia, Japan, Korea, Chile, Brazil and Uruguay. It has none with the UAE or the Caribbean zero-tax states, so a self-employed American there generally still owes US self-employment tax.
Foreign companies and funds have their own rules. US owners of foreign corporations face anti-deferral rules that can tax company profits before they are paid out. Foreign mutual funds and ETFs are often treated as passive foreign investment companies, with punitive tax and reporting.
Reporting continues. FBAR, Form 8938 and related forms apply regardless of where you live.
How common income types are treated
| Income type | Taxed by a zero-tax country? | Taxed by the US? | Relief that may apply |
|---|---|---|---|
| Salary for work done abroad | No | Yes | FEIE up to $132,900 (2026) plus housing exclusion |
| Self-employment income from work abroad | No | Yes, including self-employment tax | FEIE for income tax only |
| Dividends and interest | No | Yes | None from the FEIE |
| Capital gains, including crypto | No | Yes | None from the FEIE |
| Rent from US property | No | Yes | Normal deductions |
| US Social Security benefits | No | Partly | Normal US rules |
Puerto Rico: the main exception
Puerto Rico is part of the United States, but its bona fide residents generally exclude Puerto Rico-source income from US federal income tax under section 933 of the Internal Revenue Code. Puerto Rico then applies its own tax system, including incentives under Act 60.
The Act 60 resident investor program has offered a 0% Puerto Rico rate on capital gains that accrue after the move, and on interest and dividends. Act 38-2026, enacted on 10 March 2026, extended the program to 2055 but set a 4% rate on dividends, interest and certain capital gains for applications filed after 31 December 2026, according to an April 2026 bulletin from Puerto Rico's Office of Incentives. New applicants after that date must also not have lived in Puerto Rico in the six years before moving, according to DLA Piper.
Bona fide residence requires meeting presence, tax home and closer connection tests, and income from outside Puerto Rico remains US-taxable. Gains that built up before the move have special sourcing rules.
Renunciation: the only full exit
The only way for a citizen to end US tax residence is to give up citizenship. It is irreversible, and anyone who takes this step generally needs another citizenship first to avoid statelessness. The steps and costs are covered in our guide to renouncing US citizenship.
Some people who renounce are 'covered expatriates' and pay an exit tax on unrealized gains, as if they had sold their assets the day before expatriation. For 2026, a person is covered if their net worth is $2 million or more, if their average annual net income tax for the previous five years is above $211,000, or if they cannot certify five years of US tax compliance. The first $910,000 of deemed gain is excluded in 2026.
The government fee for the certificate of loss of nationality fell from $2,350 to $450 under a final rule published in the Federal Register on 13 March 2026, effective for appointments from 13 April 2026.
Zero-tax destinations Americans often consider
Americans looking at countries with no personal income tax most often look at the UAE, the Bahamas, the Cayman Islands and Monaco. In each case the local tax saving is real but limited to the foreign layer. Other practical factors usually weigh as much as tax:
- Banking. FATCA reporting makes some foreign banks reluctant to open accounts for Americans.
- Residence rights. Zero-tax countries rarely offer an easy path to permanent status or citizenship.
- Health insurance and Medicare. Medicare generally does not cover care abroad.
- Treaty network. Without a treaty or totalization agreement, double taxation and double social security risks are harder to manage.
The relationship between the FEIE and the foreign tax credit also changes by destination. Our comparison of FEIE vs the foreign tax credit shows when each one is used.
Frequently asked questions
Is there any country where US citizens pay no tax?
No foreign country can switch off US tax for a citizen. Moving to a zero-tax country removes local income tax, and the FEIE can shelter some earned income, but US tax on other income continues. Puerto Rico residents can exclude Puerto Rico-source income from federal tax.
Do I have to file a US tax return if I live in Dubai?
Yes, if your income is above the normal filing threshold. Living abroad gives an automatic extension to June 15, but it does not remove the filing duty. Reliefs such as the FEIE are claimed on the return.
Does the foreign earned income exclusion cover investment income?
No. The FEIE covers wages and self-employment income for work done abroad. Dividends, interest, capital gains, rents and pensions are not earned income and remain taxable.
Can I stop paying state income tax after moving abroad?
Often, if you give up domicile in your former state. Some states examine remaining ties, such as a home or driver's license, before they accept that residence has ended, so the result depends on the state and your facts.
How much does it cost to renounce US citizenship in 2026?
The State Department fee is $450 for appointments from 13 April 2026. People who are covered expatriates may also owe exit tax on unrealized gains above the $910,000 exclusion for 2026.
Important: This article is general information, not tax, legal or financial advice. Rules change often and depend on your personal circumstances. Speak with a qualified professional in each relevant country before you act.