US Expat Tax Guide: How to Maintain Florida Domicile While Living Abroad

The United States is one of only two countries in the world that taxes based on citizenship rather than residency. If you hold a US passport or green card, the IRS expects you to report your worldwide income every year, regardless of where you live, where you earn that income, or how long you have been abroad. This is not optional. It applies whether you are a software engineer in Berlin, a retiree in Portugal, or a nurse on contract in Saudi Arabia.

US expat tax obligations break down into three distinct layers. The first layer is federal income tax. You owe US income tax on all worldwide earnings unless you qualify for specific exclusions or credits. The second layer is self-employment tax. If you work as an independent contractor abroad, you generally owe Social Security and Medicare taxes (15.3% combined) on net self-employment income, even if you qualify for the FEIE. Totalization agreements with certain countries can exempt you from double contributions, but these must be claimed specifically. The third layer is reporting obligations. FBAR, FATCA (Form 8938), and other disclosure forms carry severe penalties for non-compliance, even when you owe zero tax.

On top of federal obligations, many expats also face state-level taxation. Your former state may still consider you a tax resident and expect you to file and pay state income tax. This guide covers all four layers and shows you how to address each one before you leave the country -- or, if you are already abroad, how to fix gaps in your tax position now.

For a condensed overview of the key 2026 changes affecting expats, see our 2026 expat tax season update.

The FEIE is the most widely used tax benefit for Americans living abroad. Claimed on IRS Form 2555, it lets you exclude up to $130,000 of foreign earned income for tax year 2025 and up to $132,900 for tax year 2026. If you are married and both spouses work abroad, each spouse can claim the exclusion separately, potentially sheltering over $265,000 in combined household income from federal tax.

To qualify, you must meet one of two tests. The Physical Presence Test requires you to be physically present in a foreign country or countries for at least 330 full days during any consecutive 12-month period. Days spent in transit through the US count as US days. The Bona Fide Residence Test requires you to establish a genuine residence in a foreign country for an uninterrupted period that includes at least one full calendar year. The IRS looks at factors like the nature of your stay, the purpose of your trip, and the length and nature of your stay abroad to determine bona fide residence.

On top of the base exclusion, you may also claim the Foreign Housing Exclusion, which covers qualifying housing expenses above a base amount (16% of the FEIE limit) up to a cap that varies by location. High-cost cities like London, Hong Kong, and Singapore have significantly higher housing limits.

The FEIE is not always the best choice. If you earn above the exclusion limit, or if you live in a country with high income taxes, the Foreign Tax Credit may save you more. Once you elect the FEIE, you can revoke it, but the IRS imposes a five-year lock: you cannot re-elect the FEIE for five tax years without IRS approval. This makes the initial decision significant.

For a detailed breakdown of how the FEIE works in practice, including examples and income thresholds, read our 2026 FEIE guide. You can also estimate your savings with our FEIE calculator.

The Foreign Tax Credit (FTC, claimed on Form 1116) takes a fundamentally different approach from the FEIE. Instead of excluding income, the FTC gives you a dollar-for-dollar credit against your US tax bill for income taxes you have already paid to a foreign government. If you pay $25,000 in UK income tax, for example, that $25,000 directly reduces your US tax liability.

The FTC tends to save more money in three scenarios. First, when you live in a high-tax country where the foreign tax rate exceeds the US rate -- countries like France, Germany, the UK, and Japan. Second, when your income exceeds the FEIE limit, since the FTC has no cap. Third, when you have significant investment or passive income, which the FEIE does not cover at all but the FTC can offset.

You are allowed to use both the FEIE and FTC in the same tax year, but not on the same income. A common strategy is to use the FEIE on your first $132,900 of earned income and then apply the FTC to income above that threshold or to passive income. However, the five-year revocation lock on the FEIE means that switching strategies mid-stream has real consequences. Careful planning upfront prevents costly mistakes.

For a side-by-side comparison with worked examples, see our Foreign Tax Credit 2026 guide. Our US expat tax calculator helps you model both scenarios with your actual numbers.

This is the single biggest tax mistake US expats make. The Foreign Earned Income Exclusion is a federal provision only. It has zero effect on your state tax obligations. If you were domiciled in California before moving to London, California still considers you a resident and expects you to file a state return and pay California income tax on your worldwide income. The FEIE will not help you here.

Several states are particularly aggressive about taxing former residents who move overseas. California uses a presumption that anyone leaving the country remains a California resident until they can prove otherwise. New York applies its own statutory residence test that can pull you back into the tax net if you maintain a "permanent place of abode" in the state. Our analysis of the best and worst domicile states for expats in 2026 ranks each state by how difficult it is to sever tax ties.

The solution is straightforward: establish domicile in a zero-income-tax state before you leave the country. Florida is the most popular choice among expats because it combines zero state income tax with no minimum day requirement and no intent-to-return test. Once your domicile is in Florida, there is no state income tax to worry about -- period. This is the missing piece that turns the FEIE from a partial solution into a complete one.

For a deeper look at how state taxes affect expats specifically, read our guide on whether expats still pay state taxes. If you are comparing Florida to other zero-tax states like Texas or Nevada, see our comparison of the best domicile states for expats and nomads.

Timing matters. The strongest domicile case is built before you leave the country, not after. Ideally, start the process 1-3 months before your departure date. This gives you time to complete each step without rushing and creates a clear, dated paper trail that your old state cannot easily challenge.

The first step is securing a Florida residential address. This must be a real street address, not a PO Box. The address will appear on your driver's license, voter registration, bank accounts, and tax returns. A virtual mailbox with a residential street address satisfies all of these requirements and gives you remote access to your mail from anywhere in the world.

Next, visit a Florida DMV to obtain your Florida driver's license. When you do, surrender your previous state license. This is one of the most powerful domicile indicators because it creates an official government record of your change in residence. Keeping your old license active is one of the most common reasons sticky states successfully argue that you never truly left.

File a Declaration of Domicile with the clerk of the circuit court in your Florida county. This sworn statement formally declares your intent to make Florida your permanent home. While not legally required, it is one of the strongest pieces of evidence in any domicile dispute.

Register to vote in Florida and cancel your voter registration in your former state. Then systematically sever other ties: update your address with banks, insurance companies, the Social Security Administration, the IRS (Form 8822), and any professional licenses or memberships. For a complete walkthrough of what ties to sever and in what order, see our state tax migration guide.

Our Florida domicile checklist provides a step-by-step printable list you can follow. For a broader overview of the full residency change process, including DMV requirements and timeline, see how to become a Florida resident in 2026.

Once established, Florida domicile is relatively straightforward to maintain from abroad. Unlike states that impose minimum-day requirements (such as the 183-day rules common in many states), Florida has no physical presence requirement for maintaining domicile. Your domicile is a legal status based on intent, not a residency test based on counting days.

The key actions that demonstrate ongoing intent to remain a Florida domiciliary are: keeping your Florida driver's license current (you can renew online or by mail from abroad), maintaining your Florida address on all official accounts, filing your federal tax return with your Florida address, and keeping a US bank account open with your Florida address on file.

Voting from abroad is one of the most powerful signals of domicile intent. The Federal Post Card Application (FPCA), available through the Federal Voting Assistance Program (FVAP), allows you to register and request absentee ballots from your Florida address. Participating in Florida elections from overseas directly reinforces that Florida remains your legal home.

A virtual mailbox is essential for expats maintaining Florida domicile. It gives you a real street address where government agencies, banks, and the IRS can send correspondence. You can view, scan, and forward mail from anywhere with an internet connection. Without one, important mail goes uncollected, bank accounts get flagged, and the paper trail that supports your domicile begins to weaken.

If you are a digital nomad moving between countries, the same principles apply. Florida domicile gives you a stable US home base regardless of how frequently you change locations abroad. For a broader look at tax planning for location-independent workers, see our 2026 digital nomad tax guide.

Expats must file several forms beyond the standard 1040. Here is the complete list of what the IRS and FinCEN expect from Americans living abroad:

• Form 1040 -- Your standard US individual income tax return, filed using your Florida address. Due April 15, with an automatic 2-month extension to June 15 for expats living abroad.
• Form 2555 -- Used to claim the Foreign Earned Income Exclusion and the Foreign Housing Exclusion. Attached to your 1040.
• Form 1116 -- Used to claim the Foreign Tax Credit. Required if you are offsetting US tax with taxes paid to a foreign government.
• Form 8938 (FATCA) -- Statement of Specified Foreign Financial Assets. Required if your foreign assets exceed $200,000 on the last day of the tax year or $300,000 at any point during the year (thresholds for single filers living abroad; married filing jointly thresholds are double). Filed with your 1040.
• FinCEN Form 114 (FBAR) -- Report of Foreign Bank and Financial Accounts. Required if the aggregate value of all your foreign financial accounts exceeds $10,000 at any point during the calendar year. Filed separately with FinCEN (not the IRS) by April 15, with automatic extension to October 15.

Note that FBAR and FATCA are separate filings with different thresholds, different agencies, and different penalties. Many expats must file both. The FBAR threshold ($10,000) is much lower than FATCA ($200,000 for expats), which is why FBAR catches more filers. Penalties for willful FBAR violations can reach $100,000 or 50% of account value, whichever is greater.

For a complete walkthrough of every form, deadline, and extension option, see our 2026 US expat filing requirements guide.

New for 2026, a 1% excise tax applies to certain international money transfers funded by cash or cash equivalents. This is not a tax on all wire transfers. It specifically targets remittances funded through cash deposits, money orders, and prepaid instruments at remittance service providers.

The critical exemption: transfers from a US bank account via standard wire transfer or ACH are not subject to the remittance tax. If you send money from your Chase or Bank of America account to your foreign bank account, the 1% tax does not apply. This is one more reason why maintaining a US bank account is essential for expats.

Florida domicile plays a direct role here. US banks routinely close accounts when they detect a foreign address on file. By keeping a Florida residential address on your bank account, you maintain uninterrupted access to your US banking relationship and ensure all your international transfers qualify for the bank-account exemption. Losing your US bank account forces you into cash-based remittance services that are subject to the 1% tax.

For the full details on who the remittance tax affects and how to structure your transfers to stay exempt, read our 2026 remittance tax guide for expats and nomads.

Your destination country significantly affects which tax strategy works best. Portugal has become one of the most popular expat destinations thanks to its D7 passive income visa and D8 digital nomad visa. Portugal's Non-Habitual Resident (NHR) regime offered favorable tax treatment for new arrivals, though the program has undergone changes. US expats in Portugal should generally use the Foreign Tax Credit rather than the FEIE because Portuguese income tax rates are high enough that the FTC provides full or near-full offset of US tax liability. For a detailed analysis, see our Portugal digital nomad tax guide for 2026.

Totalization agreements are bilateral treaties between the US and 30 countries that prevent double Social Security taxation. If you work in a country with a totalization agreement (including the UK, Germany, France, Canada, Japan, and Australia), you generally pay into only one country's social security system. Without a totalization agreement, you may owe self-employment tax to the US even while paying into a foreign pension system.

Countries with zero or territorial tax systems -- such as the UAE, Panama, and Paraguay -- present unique planning opportunities. In these locations, the FEIE is typically more beneficial than the FTC because you are paying little or no local tax, leaving no foreign tax credits to claim.

For healthcare workers considering international contracts, the same domicile principles apply. Our travel nurse tax home guide covers how international nursing assignments interact with tax home rules. Digital nomads working across multiple countries should also review our FEIE planning guide for US digital nomads.

After working with hundreds of expats, these are the mistakes we see most often. Every one of them is avoidable with proper planning.

For additional tax planning strategies including how to combine the FEIE with Texas domicile instead of Florida, see our Texas domicile guide for expats.