Tax Guide · Expats

Expat Taxes: The Complete Guide

Every tax obligation an American expat actually faces once you’ve stopped moving and settled somewhere — bona fide residency, the foreign housing exclusion, PFIC exposure on local investment accounts, state tax domicile, foreign pensions and totalization agreements, real estate and Section 121, estate exposure with a non-citizen spouse, and what changes if you eventually consider giving up citizenship. Written for people building a life in one country, not tracking days across twelve.

Last updated: July 2026  •  Written by Carlos Grider  •  Read time: ~12 min

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Important Disclaimer

Quick Jump

1. The Expat Tax Situation at a Glance
2. State Tax Domicile: The Trap Expats Don’t See Coming
3. US Citizens: The Permanent Obligation
4. The Bona Fide Residence Test and the Foreign Housing Exclusion
5. FEIE vs. Foreign Tax Credit for Settled Expats
6. Establishing Tax Residency Abroad — Correctly
7. PFIC: The Silent Trap in Local Investment Accounts
8. Foreign Pensions and Totalization Agreements
9. FBAR and FATCA for Expats
10. Foreign Real Estate: Capital Gains, Rental Income, and Section 121
11. Estate, Gift, and the Non-Citizen Spouse Problem
12. Tax Status by Country: Popular Expat Destinations
13. Renouncing Citizenship and the Exit Tax
14. The 8 Most Common Expat Tax Mistakes
15. Building Your Expat Tax Setup
16. Resources & Professional Help

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The Expat Tax Situation at a Glance

The nomad tax problem is avoidance — staying under thresholds, not triggering residency anywhere. The expat tax problem is the opposite: you’ve deliberately settled, you likely are a tax resident somewhere, and now the question is how to manage that correctly. Four dimensions to track, and they interact.

Dimension 1: Your Host Country

As a settled resident, you’re very likely a tax resident of your host country and owe local income tax on at least local-source income, sometimes worldwide income depending on the country’s system (territorial vs. worldwide).

Dimension 2: The US (Permanent, Regardless)

US citizens owe US tax on worldwide income forever, regardless of residency. This doesn’t change no matter how long you’ve been gone. Covered in full below.

Dimension 3: Your Home State (If US)

Unlike your home country, your home state doesn’t automatically release you when you leave the country. Several states are notoriously aggressive about retaining domicile. This is the dimension nomads rarely deal with seriously and expats consistently get wrong.

Dimension 4: Reporting (Separate From Tax Owed)

FBAR, FATCA, and — critically for expats specifically — PFIC reporting on local investment funds. Settled expats with local bank and brokerage relationships hit these requirements far more than nomads passing through on tourist visas.

The Key Question for Expats

Have you correctly and deliberately established tax residency in your host country and formally severed the ties that keep your home state chasing you? Most expat tax problems trace back to one half of that equation being incomplete.

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State Tax Domicile: The Trap Expats Don’t See Coming

Leaving the United States doesn’t automatically end your state tax obligation. States tax based on domicile — your permanent legal home — not physical presence, and domicile doesn’t change just because you moved abroad. It changes when you establish a new domicile somewhere else and can demonstrate you don’t intend to return to the old one.

The “Sticky” States

State	Why It’s Aggressive	What Reduces Exposure
California	Extremely aggressive domicile-retention doctrine. Moving abroad without establishing domicile elsewhere retains full California domicile — and California tax stacks in full, with no credit available for foreign country taxes paid (Schedule S explicitly excludes foreign taxes from the credit).	Sell or rent out CA property, register to vote elsewhere or nowhere, move driver’s license and banking, demonstrate no intent to return
Virginia	Similar domicile-based approach; keeps taxing until you affirmatively establish domicile elsewhere	Same severance steps as above
South Carolina	Domicile-based; known for scrutinizing military and remote-worker departures specifically	Same severance steps
New Mexico	Domicile-based, aggressive on non-resident former residents with lingering ties	Same severance steps

States With No Income Tax (No Domicile Problem)

Florida, Texas, Nevada, Washington, Wyoming, South Dakota, Tennessee, and New Hampshire (on earned income) have no state income tax, so domicile retention is largely moot for tax purposes. Some expats deliberately re-domicile to one of these states before moving abroad specifically to eliminate this dimension entirely — a common and effective move if you have any flexibility in timing.

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US Citizens: The Permanent Tax Obligation

The United States taxes citizens on worldwide income regardless of residency — one of only two countries in the world that does this (the other is Eritrea). This doesn’t change after 1 year abroad or 30. You must file a US federal return every year you meet the filing threshold, for as long as you hold citizenship.

Filing Status	Must File If Gross Income Exceeds
Single (under 65)	$14,600
Married Filing Jointly (both under 65)	$29,200
Self-employed (any status)	$400 net self-employment income

Thresholds update annually for inflation; current as of July, 2026. Expats abroad on the filing deadline automatically get a two-month extension to June 15 — but any tax owed still accrues interest from April 15.

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The Bona Fide Residence Test and the Foreign Housing Exclusion

Nomads generally qualify for the FEIE through the Physical Presence Test (330+ days outside the US). Settled expats have a second, often better, path: the Bona Fide Residence Test — and it unlocks a benefit nomads rarely qualify for.

Bona Fide Residence Test

Requires establishing genuine residency in a foreign country for an uninterrupted period that includes a full calendar year — demonstrated through a residence visa, local lease or property, local ties, and clear intent to stay indefinitely (not just physical day-counting). Once qualified, you can leave the country for vacations, including trips back to the US, without jeopardizing the test the way Physical Presence Test day-counts would be jeopardized.

The Foreign Housing Exclusion (Form 2555, Part VI)

This is the piece nomads on tourist visas almost never use, and settled expats consistently leave on the table. If you qualify for the FEIE (either test) and you’re paying real, substantial housing costs abroad — rent, utilities excluding phone, property insurance, parking — you can exclude an additional amount on top of the standard FEIE cap. The base housing amount and the cap both vary by location, with high-cost cities (Tokyo, Hong Kong, London, Geneva) allowing significantly higher caps than lower-cost locations. If you’re renting a real apartment as a settled expat, run this calculation — it’s genuine additional money on top of the ~$126,500 base FEIE exclusion, and it’s routinely missed by tax preparers who default to a simple FEIE-only calculation.

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FEIE vs. Foreign Tax Credit for Settled Expats

The mechanics are the same as they are for nomads — FEIE excludes up to ~$126,500 of foreign-earned income (Form 2555); FTC gives a dollar-for-dollar credit for foreign income taxes paid (Form 1116). What changes for settled expats is which one tends to win, because you’re now actually paying real local income tax in most cases.

Situation	Better Option	Why
Settled in a high-tax country (most of Western Europe)	FTC, usually decisively	Local tax typically exceeds US liability entirely; FTC eliminates the US bill and excess credit often carries forward
Settled in a territorial or low-tax country (Panama, Paraguay, Georgia, UAE)	FEIE + Housing Exclusion	Little or no foreign tax to credit; FEIE plus housing exclusion does the real work
Retired, living on Social Security, pension, or portfolio withdrawals	FTC (if paying local tax) or neither	FEIE only covers earned income — irrelevant to most retirement income; FTC applies if the host country taxes your pension/withdrawals
Still contributing to a Roth IRA	FTC, or partial FEIE	FEIE can zero out earned income, which can eliminate the earned income needed for Roth contribution eligibility
Paying substantial rent as a resident	FEIE + Housing Exclusion, layered with FTC on the remainder	Stack the housing exclusion on top of FEIE, then FTC anything still exceeding the combined exclusion

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Establishing Tax Residency Abroad — Correctly

Nomads try to avoid triggering tax residency anywhere. Settled expats generally want clean, well-documented tax residency in their host country — it’s what makes the Bona Fide Residence Test, the housing exclusion, and often a favorable tax treaty position actually work. Half-measures create the worst of both worlds: enough presence to complicate your home country position, not enough documentation to cleanly claim host-country residency either.

What “Correctly Established” Usually Requires

• A residence visa or permit that reflects long-term intent, not a tourist stamp
• A local lease or property in your name, not a string of short-term rentals
• Local tax registration where required — many countries require you to register even before you owe anything
• A local bank account used as your primary account, not just a top-up account
• Physical presence that matches the story — genuinely spending the majority of your year there

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PFIC: The Silent Trap in Local Investment Accounts

This is the single biggest tax trap that’s specific to settled expats and barely relevant to nomads. If a local bank or advisor sets you up with a “safe, boring” local mutual fund, index fund, or investment-linked insurance product, there’s a real chance you’ve just acquired a PFIC — a Passive Foreign Investment Company — and the US tax treatment is punitive.

What Counts as a PFIC

Almost any foreign mutual fund, foreign ETF, foreign unit trust, or foreign investment-linked insurance/pension wrapper that isn’t a US-domiciled fund. This includes UK unit trusts, Australian managed funds, EU UCITS funds, and most “investment account” products a local bank abroad will try to sell a resident foreigner.

The Practical Fix

Most experienced expat advisors recommend keeping your actual investment portfolio in US-domiciled brokerage accounts (Schwab International, Interactive Brokers, and a handful of others explicitly serve US expats) and using local banking only for day-to-day cash management — not investing. If a local advisor is enthusiastic about a local “investment plan,” treat that enthusiasm as a warning sign and ask directly whether the product is a PFIC before opening it.

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Foreign Pensions and Totalization Agreements

Settled expats, unlike short-term nomads, frequently end up contributing to a host-country pension or social security system — sometimes mandatorily through local employment, sometimes voluntarily. Two separate issues follow from this.

Totalization Agreements

The US has totalization agreements with about 30 countries specifically to prevent double social security taxation and to let contributions in both systems count toward eligibility thresholds. If your host country has one, you generally only pay into one system, not both — but you need to know which one applies and, if self-employed, may need a Certificate of Coverage to prove it. No agreement means real exposure to paying both US self-employment tax and local social contributions on the same income.

Foreign Pension Accounts (RRSP, ISA, Superannuation, etc.)

Country-specific retirement vehicles — Canadian RRSPs, UK ISAs, Australian superannuation — each have their own, sometimes very different, US tax treatment. Some are recognized under specific tax treaty provisions (RRSPs, for example, have relatively favorable treaty treatment). Others, notably UK ISAs and Australian superannuation funds, are frequently treated by the IRS as PFICs or foreign trusts requiring their own additional reporting (Form 3520 territory in some superannuation cases). This is genuinely complex and treaty-specific — confirm the treatment for your specific account type with an advisor before assuming a familiar-sounding “retirement account” gets US tax-advantaged treatment. It usually doesn’t, by default.

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FBAR and FATCA for Expats

The mechanics are identical to what nomads face — covered in full detail in the Tax Guide for Nomads — but settled expats trigger these requirements far more reliably, because you almost certainly have a real local bank account, and possibly a local pension or investment account, sitting above the threshold continuously rather than intermittently.

Requirement	Threshold	Files With
FBAR (FinCEN Form 114)	Aggregate foreign accounts exceed $10,000 at any point in the year	FinCEN (separate from your tax return)
FATCA (Form 8938)	Higher thresholds, vary by filing status and whether you live abroad (e.g., $200,000 single / $400,000 MFJ at year-end for expats abroad)	Attached to your IRS Form 1040

Both may be required simultaneously — one doesn’t substitute for the other. As a settled expat with a local bank account, a local lease deposit account, and possibly a local pension or investment account, check your aggregate balance across all of them, not just your primary checking account.

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Foreign Real Estate: Capital Gains, Rental Income, and Section 121

Buying property abroad is where a lot of settled expats meaningfully depart from what any nomad ever has to think about.

If You Buy a Primary Residence Abroad

The Section 121 home sale exclusion (up to $250,000 single / $500,000 married of gain excluded) can apply to a foreign primary residence the same as a US one, provided you meet the same ownership-and-use test (2 of the last 5 years). Foreign currency gain on the mortgage itself, if you have one, can create its own separate — and often overlooked — taxable event under Section 988 when the loan is paid off or refinanced.

If You Rent Out Property Abroad

Rental income is reportable on your US return regardless of where the property sits, generally depreciated using a longer 30- or 40-year schedule than domestic property (rather than the standard 27.5-year residential schedule), and any foreign tax paid on the rental income can usually be credited via the FTC. If you own through a foreign entity rather than personally, you likely have additional reporting obligations (Form 8865 or Form 5471 territory) that a domestic-only accountant will not know to ask about.

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Estate, Gift, and the Non-Citizen Spouse Problem

Settled expats disproportionately end up here for one simple reason: they’re the ones most likely to marry a local. If your spouse is not a US citizen, several rules that domestic couples take for granted don’t apply.

Separately, US citizens remain subject to US estate tax on worldwide assets regardless of where they live or die — the exclusion amount is generous (well into eight figures as of 2026) but not infinite, and large foreign real estate or business holdings can matter more than most expats assume.

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Tax Status by Country: Popular Expat Destinations

These skew toward classic long-term expat and retirement destinations rather than the nomad-hub cities covered in the companion guide. Verify current rules before relying on any of this — several of these programs (notably Portugal’s NHR replacement) have changed recently.

Country	Residency Tax System	Foreign/Worldwide Income	Tax Treaty with US?	Notable for Expats
Portugal	Worldwide once resident	Taxed; NHR ended 2024, replaced by narrower IFICI regime	Yes	D7/D8 visa holders — verify current incentive program eligibility
Mexico	Worldwide once resident (183 days)	Taxed, with FTC-style relief for foreign tax paid	Yes	Popular Temporary/Permanent Resident path; relatively clean rules
Panama	Territorial	Foreign-source income exempt	No	Pensionado visa is a classic, low-friction retirement route
Costa Rica	Territorial	Foreign-source income exempt	No	Pensionado/Rentista visas; long-standing expat retirement hub
Uruguay	Territorial for new residents (temporary exemption, then worldwide)	Time-limited exemption on foreign passive income for new tax residents	No	Strong rule-of-law reputation; increasingly popular FIRE/expat base
Paraguay	Territorial	Foreign-source income exempt	No	Lowest residency threshold (120 days) of any option on this list
Malaysia (MM2H)	Territorial	Foreign-source income exempt (confirmed policy)	Yes	MM2H long-stay program; income remitted from abroad generally not taxed
Thailand (LTR / retirement)	180-day threshold	Foreign income taxed if remitted same year (post-2024 rule change)	Yes	LTR visa has separate, more favorable tax provisions than standard residency
Spain	Worldwide once resident (183 days)	Taxed; Beckham Law flat-rate option for qualifying new residents	Yes	Higher overall tax burden; FTC usually the better US election
Italy	Worldwide once resident	Taxed; flat-tax regime available for qualifying new residents/retirees (7% regime in eligible southern regions)	Yes	The 7% flat-tax retiree regime is a genuine, underused option for pension income
France	Worldwide once resident	Taxed; extensive treaty network	Yes	High local tax burden; FTC essential, FEIE rarely sufficient alone
Philippines	Territorial for non-resident-source income in practice for many retiree visa holders	Largely foreign income untaxed under SRRV program	Yes	SRRV retirement visa is a long-standing, low-friction option

For the underlying visa mechanics behind each of these — income requirements, processing times, paths to permanent residency — see the Long-Term Visa & Residency Directory, the Retirement Visas for Americans guide, or Best Residency Visas for Americans.

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Renouncing Citizenship and the Exit Tax

This is the one topic in this entire guide that essentially never applies to a nomad and only becomes relevant to expats who have genuinely settled long-term and are weighing whether US citizenship is worth its ongoing compliance burden. Included here because it’s a real question long-term expats eventually ask, not because most people should act on it.

Are You a “Covered Expatriate”?

If you renounce US citizenship (or give up a long-held green card), you’re classified as a “covered expatriate” — and subject to a mark-to-market exit tax — if you meet any one of three tests: your average annual net income tax liability over the prior 5 years exceeds an inflation-adjusted threshold (roughly $200,000, adjusted annually), your net worth is $2 million or more, or you fail to certify five years of US tax compliance. Meeting none of the three means the exit tax doesn’t apply, even if you do renounce.

What the Exit Tax Actually Does

If you’re a covered expatriate, the IRS treats your worldwide assets as sold the day before expatriation, taxing the built-in gain above an annually adjusted exclusion amount. Separately, US-person heirs who later receive gifts or bequests from a covered expatriate can face their own inheritance tax under Section 2801 — the mechanism is designed to prevent the exit tax from simply being deferred a generation.

This is genuinely irreversible and genuinely complex — it is not a decision to make from a blog post. If you’re at the point of seriously considering it, that’s a conversation with a cross-border tax attorney, not a DIY project.

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The 8 Most Common Expat Tax Mistakes

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Building Your Expat Tax Setup

Year 1: Foundation

• Formally sever state domicile if your former home state is a “sticky” one — before or immediately after departure, not years later
• Engage an expat tax specialist, not a domestic generalist
• Determine whether Bona Fide Residence or Physical Presence Test fits your situation, and document accordingly
• Before opening any local “investment account,” ask directly whether it’s a PFIC
• Check whether your host country has a US totalization agreement
• Register locally for tax purposes if required — many countries require registration before any tax is owed

Ongoing Annual Checklist

• Run both the FEIE (with housing exclusion) and FTC calculations — don’t default to whichever you used last year
• File your US return by June 15 (automatic extension for those abroad) or request Form 4868
• File FBAR by April 15 (auto-extends to October 15) if aggregate foreign accounts exceeded $10,000
• Confirm FATCA Form 8938 thresholds if applicable
• Review any foreign investment or pension accounts for PFIC exposure before year-end
• Reassess whether your host-country tax residency documentation is still solid

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Professional Help & Resources

Finding an Expat Tax Advisor

• Bright!Tax — US expat tax specialists; flat-fee pricing
• Greenback Expat Tax Services — US-focused expat tax preparation
• MyExpatTaxes — Software-assisted option for simpler situations
• MFAC Financial Advisors — Fee-only planning for US expats, including PFIC-aware investment guidance

Government Resources

• IRS International Taxpayer Resources
• FinCEN BSA E-Filing (FBAR filing portal)
• IRS Form 2555 (FEIE) instructions
• IRS Form 1116 (Foreign Tax Credit) instructions
• IRS Form 8621 (PFIC) instructions

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Still moving between countries rather than settled? The companion Tax Guide for Nomads covers 183-day tracking, the perpetual traveler strategy, and multi-country tax exposure — the situation this guide assumes you’ve moved past.