How to Assess the Tax Impact Before Moving Abroad from the U.S.

Key points

• The United States keeps taxing citizens on worldwide income after they move, while the destination may start taxing them as residents. The move creates a two-system problem that should be modeled before it happens.
• Green-card holders stay U.S. tax residents until the card is formally abandoned, and long-term residents (8 of the last 15 years) can face the expatriation rules when they give it up.
• Each type of income needs its own analysis: salary is sourced where the work is done, the Foreign Earned Income Exclusion ($132,900 in 2026) does not cover investment income, and retirement accounts may lose their tax deferral abroad.
• A former state can keep taxing you: California and New York, for example, look at domicile, available homes and days spent in the state.
• Many planning steps, such as realizing gains, exercising options, reorganizing companies or making gifts, work better before foreign residence begins.

How do you assess the tax impact of moving abroad from the United States?

Start with a full picture of your situation, then test it under both systems. List your U.S. status (citizen, green-card holder or other resident), current state, destination, family plans, income by type and every asset, company, trust and account. Then work out when the destination will treat you as resident, how it taxes each category of income, which U.S. exclusions, credits and treaty rules apply, what your former state will claim, and which new reporting obligations the move creates. The result should cover several years, not only the year of the move.

Moving abroad is often approached as an immigration, lifestyle or cost-of-living decision, and tax enters the conversation late, sometimes after the individual has rented a home overseas, registered locally, opened foreign bank accounts or started working from the new country. For Americans that order can be expensive, because the destination may acquire the right to tax the same person as a resident while the United States keeps taxing them as a citizen.

The result is not necessarily double taxation, but it is almost always a two-system problem. Foreign tax credits, the Foreign Earned Income Exclusion, income tax treaties, social-security agreements and special regimes in the destination can substantially reduce the overlap, but they apply differently to salary, self-employment income, dividends, capital gains, pensions, rental income, business profits, trusts and investment accounts.

Why the tax assessment should happen before the move

International relocation creates tax consequences through events that look ordinary from a lifestyle perspective: signing a long-term lease, registering a foreign address, moving a spouse and children, spending most of the year abroad, shifting professional activity overseas or opening local financial accounts. None of these alone necessarily settles the tax position. Together, they can establish tax residence, change the source of employment income, create local social-security liability and produce new reporting obligations.

Timing matters because many planning opportunities work better before foreign residence begins. The taxpayer may want to realize capital gains while only the current regime applies, restructure a portfolio that holds products problematic for U.S. taxpayers abroad, exercise stock options, change the ownership of a business, make gifts, reorganize trusts or review retirement arrangements. Once the individual is resident in the new country, those transactions may also fall under its income, wealth, gift, capital-gains or reporting rules.

The analysis should begin with a pre-move balance sheet: citizenship and immigration status, current state domicile, destination, family location, expected travel, salary, business interests, investment assets, retirement plans, real estate, trusts, bank accounts, digital assets and expected liquidity events. The objective is to understand how the move changes the taxation of income and assets over several years and whether the chosen country still makes sense once both systems are considered together.

Who remains inside the U.S. tax system after moving abroad?

The first question is not where the person is moving, but why the United States currently taxes that person. Citizens, green-card holders and other U.S. tax residents face very different consequences when they leave.

U.S. citizens

For a U.S. citizen, moving abroad does not end federal income-tax residence. The United States continues taxing worldwide income, and the taxpayer generally keeps filing Form 1040 after becoming fully resident in another country. The destination becomes an additional taxing jurisdiction rather than a replacement for the United States. Becoming a tax resident of Spain, Portugal, Italy, the UAE, Singapore or another country does not convert a U.S. citizen into a nonresident for U.S. purposes; relief has to come from U.S. exclusions and credits, treaties or the foreign country's own rules.

Green-card holders

A lawful permanent resident faces a different analysis. Physically leaving the United States does not end U.S. tax residence under the green-card test. In general, the status continues until the green card is formally abandoned or revoked, or until a treaty tie-breaker is properly claimed.

Long-term residents need extra care. A person who has held a green card in at least 8 of the previous 15 tax years can fall within the expatriation regime when the residency ends, and claiming treaty residence in another country can itself have that effect.

Other U.S. tax residents

Individuals who are neither citizens nor green-card holders may have been U.S. tax residents under the substantial presence test. Their departure can produce a dual-status year and requires analysis of the residency-ending date, U.S.-source income after departure, treaty positions, withholding and continuing U.S. investments. They can eventually be taxed as nonresident aliens rather than on worldwide income.

Federal income tax abroad: the FEIE and the foreign tax credit

For Americans abroad, the central question is usually not whether a U.S. return continues, but how the U.S. liability interacts with tax paid overseas. The two main tools are the Foreign Earned Income Exclusion (FEIE) and the foreign tax credit, and they are not interchangeable.

For 2026, a qualifying individual can exclude up to $132,900 of foreign earned income. Qualification requires a foreign tax home and either the bona fide residence test or the physical presence test of 330 full days abroad in a 12-month period. The exclusion covers earned income only: dividends, interest, pensions, capital gains and Social Security are not excluded because the taxpayer lives overseas, and the FEIE does not remove U.S. self-employment tax.

The foreign tax credit lets qualifying foreign income taxes offset the U.S. tax on foreign-source income, and excess credits can generally be carried back one year and forward ten. A taxpayer moving to a low-tax country may get more value from the FEIE, because there is little foreign tax to credit. A taxpayer moving to a high-tax European country may generate enough credits to eliminate the U.S. tax on that income. The right answer comes from modeling, not from assuming that the largest advertised exclusion produces the lowest bill. Our guide to whether U.S. citizens can pay zero tax explains how the two tools combine.

Foreign tax residence: start with the destination's rules

Staying below 183 days does not automatically prevent foreign tax residence. Countries combine physical presence with a permanent home, habitual residence, domicile, family location, center of economic interests, registration or employment, so a person can become resident well before 183 days, or spend most of the year in a country while a treaty assigns residence elsewhere. The analysis starts with the destination's domestic law and turns to a treaty only when both countries claim the person. Our guide to the 183-day rule explains the tests and treaty tie-breakers in detail.

For U.S. citizens there is an extra layer. Even if a treaty treats the individual as resident of the foreign country, most U.S. treaties contain a saving clause that preserves U.S. taxation of citizens, with specified exceptions. Treaty residence matters for the foreign country's taxing rights, but it does not erase citizenship-based U.S. tax.

Map your income by category

A meaningful comparison cannot be built from a single marginal tax rate. Before moving, separate projected income into categories, because the United States, the destination and the treaty can treat each one differently.

Employment and remote salary

Compensation for personal services is generally sourced where the services are physically performed. An American working from France for a company in New York does not have U.S.-source salary merely because the employer and bank account are American.

Dividends, interest and capital gains

The FEIE does not shelter dividends, interest or capital gains. The destination may tax gains differently from the United States, impose a wealth tax, exempt certain holdings or use a different cost basis. A portfolio that is efficient for a U.S. resident can become inefficient once foreign residence begins; our guide to U.S. investments when moving abroad covers brokers, funds and retirement accounts.

Retirement accounts and pensions

401(k)s, IRAs, Roth accounts, foreign pensions, Social Security and employer plans should be checked under both domestic laws and the treaty. A plan with tax deferral in the United States does not automatically receive the same treatment abroad, and contributions, growth and distributions can each be treated differently.

Rental and real-estate income

Real property stays strongly connected to the country where it is located. An American who keeps a rental property in the United States after moving overseas remains exposed to U.S. federal and possibly state tax, and may also have to report the income in the country of residence.

Stock options and equity compensation

RSUs, options, carried interest, deferred bonuses and similar compensation are especially complicated because vesting periods can span several countries. Moving shortly before vesting or exercise can change sourcing, withholding, foreign tax credits and employer obligations.

The model should show tax by income category, not only total income. Two people earning $250,000 a year can have very different results if one receives salary and the other receives dividends, partnership distributions, stock gains or pension income.

Foreign bank accounts and investments: tax is only half the compliance cost

Moving abroad normally creates foreign financial relationships: bank accounts for rent and utilities, investment accounts, local pensions, insurance products, companies or payment platforms. Even where these create little additional U.S. tax, they can create substantial reporting obligations.

FBAR

A U.S. person generally must file an FBAR when the combined maximum value of foreign financial accounts exceeds $10,000 at any point during the calendar year. The threshold applies to all accounts together: three accounts of $4,000 each cross it even though none ever holds more than $10,000. Our guide to the FBAR explains who files and the penalties.

FATCA and Form 8938

Form 8938 is separate from the FBAR, with higher thresholds for taxpayers living abroad: an unmarried taxpayer generally files above $200,000 of specified foreign financial assets on the last day of the year or $300,000 at any time, and married couples filing jointly above $400,000 and $600,000. Filing one form does not satisfy the other.

Foreign funds, pensions and trusts

Many non-U.S. pooled funds are passive foreign investment companies (PFICs), which can require a separate Form 8621 for each fund and lead to unfavorable taxation. Foreign trusts, and some foreign pension or retirement arrangements depending on their legal features, can create Forms 3520 and 3520-A obligations.

State tax residency: moving abroad does not automatically end state tax

State residency can produce one of the most avoidable costs of an international move. States have their own rules for domicile, statutory residence, source income and departure, and a taxpayer can become resident of another country while still being treated as a resident of a U.S. state.

Domicile focuses on the taxpayer's permanent home and intention, supported by objective facts. A foreign residence permit or spending most of the year overseas may not be enough if the taxpayer keeps a home, family, business activity, driver's licence, voter registration or other significant connections in the former state.

California illustrates the facts-and-circumstances approach. The Franchise Tax Board treats a California resident as still resident while absent for a temporary or transitory purpose, and offers an employment-related safe harbor for an uninterrupted absence of at least 546 days, subject to conditions such as limited visits and a cap on intangible income.

New York uses both domicile and statutory residence. A person domiciled elsewhere is still a New York resident when keeping a permanent place of abode in the state and spending 184 days or more there during the year. Changing domicile requires showing that the former domicile was abandoned and a new one established, not just filing declarations or changing addresses.

The purpose is not to manufacture evidence of departure but to make the legal position match reality. Someone genuinely moving abroad should align documents, family life, property, financial records and day counts with the move instead of leaving contradictory ties behind.

Remote work and self-employment: paid from America is not taxed only in America

Remote workers often assume that a salary from a U.S. company keeps the income entirely within the U.S. tax system. The sourcing rule points the other way: compensation is connected to where the work is done, whatever the employer's location or the bank receiving the pay.

Working abroad can therefore create, at the same time:

• local income tax;
• local payroll or withholding obligations;
• employer registration requirements;
• social-security contributions;
• changes in benefits or employment-law treatment;
• foreign tax credit effects in the United States;
• permanent-establishment or corporate-tax issues where the employee has enough authority or business activity.

Self-employed individuals need extra attention, because the FEIE reduces regular income tax on qualifying foreign earned income but does not remove U.S. self-employment tax. Totalization agreements, which the United States has with countries such as Canada, Brazil, the United Kingdom, Germany, Italy, Spain, Japan, South Korea and Australia, can assign social-security coverage to one country and prevent paying into both.

For a remote worker, the question before moving is not only whether the employer allows overseas work, but whether the arrangement stays legally and fiscally efficient once the work is performed in another country.

Entrepreneurs and investors: the company structure can become the tax problem

Business owners face an extra layer, because relocation can change the treatment of the entities they own and manage. A founder may move abroad while keeping a U.S. LLC, S corporation, C corporation, partnership, foreign company or a combination, and each produces a different interaction between U.S. and foreign law.

The first issue is classification. An entity that is transparent in the United States may be a corporation in the destination, or the reverse. The two countries can then disagree about who earned the income, when it was earned, or whether a payment is salary, dividend, business profit or return of capital, and foreign tax credits may fail to match the U.S. tax year or the same taxpayer. Foreign corporations owned after the move also bring Form 5471 and the controlled foreign corporation rules.

The destination should be reviewed separately for:

• corporate residence based on management or control;
• permanent-establishment exposure;
• local payroll obligations;
• VAT or similar indirect taxes;
• transfer pricing;
• withholding on dividends, interest or royalties;
• local substance requirements;
• taxation of distributions from U.S. LLCs;
• treatment of trusts, partnerships and disregarded entities.

A common error is assuming that keeping a U.S. company keeps all business profits American. If the owner directs the company from a home office abroad, signs contracts locally, hires staff there or manages the business from that country, the foreign jurisdiction may acquire taxing rights over part of the activity. An entity that was efficient while the founder lived in Florida or Texas can become the most expensive part of the move. Our guide to choosing between a U.S. LLC or a foreign company compares the options.

Estate, gift and exit tax: model the move beyond annual income

Income tax is only one part of long-term planning. The destination may impose inheritance, succession, gift, net-wealth or property taxes with no U.S. equivalent, so the model should cover what happens if assets are transferred, sold, inherited or kept for life.

U.S. citizens remain within the federal estate and gift tax system while living overseas. For 2026, the basic exclusion amount is $15 million, the annual gift exclusion is $19,000 per recipient, and the annual exclusion for gifts to a spouse who is not a U.S. citizen is $194,000. An estate below the U.S. threshold can still face significant local inheritance tax, and companies or trusts may be respected differently abroad, so wills, beneficiary designations, marital-property rules, forced heirship and the location of assets should be reviewed before settling abroad.

Moving abroad is not the same as giving up citizenship. Section 877A applies only when citizenship is relinquished or certain long-term green-card holders end their residency. For 2026, a person is a covered expatriate with an average annual net income tax above $211,000 over the previous five years, a net worth of $2 million or more, or failure to certify five years of tax compliance, and covered expatriates are taxed as if their property were sold the day before expatriating. That decision needs its own analysis; our guide to renouncing U.S. citizenship explains it.

A pre-move timeline

Twelve months before the move:

• Build the pre-move balance sheet of status, income, assets, companies, trusts and accounts.
• Check the destination's residence rules, special regimes and whether a U.S. treaty and totalization agreement exist.
• Model each income category under both systems for at least three years.
• Map vesting dates of options and RSUs and planned liquidity events.

Six months before:

• Decide which gains to realize, which options to exercise and which gifts to make before foreign residence begins.
• Confirm in writing what your broker and retirement-plan custodians will allow after the move, and rebalance funds you will not be able to buy abroad.
• Review company structures, trusts and the employer's position on payroll and permanent establishment.

Three months before:

• Plan the state exit: home, driver's licence, voter registration, vehicles and mailing addresses.
• Update wills and beneficiary designations so they work in both countries.
• Prepare local banking and a record system for FBAR and Form 8938.

In the first year abroad:

• Keep a day-count and workday calendar and evidence of the move.
• Register locally within the destination's deadlines.
• File a part-year return in the former state, the FBAR and Form 8938 where required, and choose between the FEIE and the foreign tax credit on the U.S. return.

Bottom line

Assessing the tax impact of moving abroad requires more than comparing U.S. federal rates with the destination's headline rate. You need to establish whether U.S. worldwide taxation continues, when the destination will treat you as resident, how each category of income will be taxed, which credits and exclusions apply, what your former state will claim and which reporting obligations the move creates. The same destination can be very efficient for one American and unexpectedly expensive for another.

The strongest relocation plans are designed before residence changes, treating tax residence, immigration status, portfolio, business ownership, social-security coverage, estate planning and state departure as parts of one transaction. Moving overseas does not automatically reduce tax, but careful modeling shows where genuine savings exist, where double taxation can be avoided and where an attractive country hides costs that only appear after the move.

Our Private Advisory Session builds your pre-move balance sheet, models the move under U.S., state and destination rules, and sets the order of the steps before you go.

Sources

• IRS: Publication 54, Tax Guide for U.S. Citizens and Resident Aliens Abroad
• IRS: Foreign earned income exclusion
• IRS: Foreign tax credit
• IRS: Publication 519, U.S. Tax Guide for Aliens
• IRS: Comparison of Form 8938 and FBAR requirements
• California Franchise Tax Board: Publication 1031, Guidelines for Determining Resident Status
• New York State Department of Taxation and Finance: Income tax definitions
• Social Security Administration: International agreements
• IRS: What's new, estate and gift tax
• IRS: Expatriation tax