Tax Challenges Facing Foreign Citizens in the U.S.

Moving to the United States creates a long list of practical questions: Where will you live? Can you work? How will you obtain health insurance? Which school will your children attend? How will you open a bank account, build credit, rent a home, or buy a car?

Tax status may feel like a detail to resolve later.

That is often a mistake.

For foreign citizens, U.S. tax obligations can begin before someone considers themselves permanently settled in the country. A temporary assignment can become a multi-year stay. A student can remain after graduation. A visitor can spend enough time in the United States to become a U.S. tax resident without receiving a green card. A nonresident investor can own U.S. assets that create income-tax, reporting, gift-tax, or estate-tax consequences.

The central issue is that immigration status and tax status are related, but they are not the same thing.

A person may be in the United States legally under a visa and still be treated as either a resident alien or nonresident alien for federal income-tax purposes. That classification can determine whether the person reports only certain U.S.-source income or reports worldwide income—including foreign wages, bank interest, investment accounts, rental property, pensions, and business interests.

For individuals and families navigating an international life, the best approach is to treat tax planning as part of the move itself, not as a task reserved for the next filing season.

The first question: resident or nonresident?

The U.S. tax system generally divides non-citizens into two broad categories:

• •**Resident aliens**, who are typically taxed much like U.S. citizens on worldwide income.
• •**Nonresident aliens**, who are generally taxed under a different framework, often focused on U.S.-source income and certain income effectively connected with a U.S. trade or business.

The green card test

The green card test is comparatively straightforward. If someone is a lawful permanent resident of the United States—commonly called a green card holder—they are generally treated as a U.S. resident for tax purposes.

The substantial presence test

The substantial presence test is more complicated because it is based on physical presence in the United States.

Under the usual framework, a person meets the substantial presence test if they are present in the United States for at least 31 days during the current year and their weighted total presence equals at least 183 days across a three-year period. The calculation includes all days in the current year, one-third of days in the prior year, and one-sixth of days in the second prior year.

The formula is:

Why the substantial presence test surprises people

The substantial presence test can be difficult because it measures actual presence, not a person's intentions.

Someone may say, "I only visit the United States for work," "My permanent home is overseas," or "I do not have a green card." Those facts may be relevant in some circumstances, but they do not automatically prevent U.S. tax residency.

A consultant who returns repeatedly for client work, a parent spending long periods with adult children, a retiree wintering in Florida or California, or an executive on a multi-year assignment may reach the threshold without realizing it.

Some days are excluded from the test. Depending on the facts, exempt individuals can include certain students, teachers, trainees, diplomats, and people temporarily unable to leave the country because of a medical condition. The rules are specific, and the word "exempt" in this context does not necessarily mean exempt from U.S. tax. It can mean exempt from counting certain days toward the substantial presence calculation.

There may also be a closer-connection exception for qualifying individuals who meet certain requirements, maintain a closer connection to a foreign country, and do not exceed a specified number of days in the United States during the year. Treaty residency rules can also affect the analysis for someone considered resident under both U.S. law and the law of another country.

These exceptions should not be assumed. They often require careful documentation and, in many cases, an affirmative filing. A person who believes they are a nonresident but does not file the appropriate form may have a much harder time defending that position later.

Keeping a travel calendar is one of the simplest and most valuable habits for internationally mobile people. Record arrival and departure dates, the purpose of each trip, visa classification, work location, and any foreign residence maintained during the year. Airline records, passport stamps, calendars, and mobile-phone data can all help reconstruct travel history—but it is far easier to track it as the year unfolds.

Worldwide income changes the picture

Once a foreign national becomes a U.S. tax resident, the United States generally taxes worldwide income in the same broad way it taxes the worldwide income of U.S. citizens.

That can include:

• •Salary, bonuses, consulting fees, and self-employment income earned abroad.
• •Interest from foreign bank accounts.
• •Dividends and capital gains from non-U.S. investments.
• •Foreign rental income.
• •Pension distributions and retirement-account income.
• •Income from a foreign business or partnership.
• •Certain trust income, inheritances, gifts, and investment arrangements.

Tax treaties can help—but not automatically

The United States has income-tax treaties with many countries. These agreements are designed to address situations where two countries may both claim taxing rights over the same person or income.

Treaties can help clarify issues such as:

• •Which country may tax employment income.
• •How pensions, Social Security-type benefits, interest, dividends, royalties, and capital gains are treated.
• •Whether a person is considered a tax resident of one country rather than another.
• •Whether a reduced withholding rate applies to particular income.
• •Whether an individual qualifies for an exemption based on temporary presence, student status, teaching, or government service.

FBAR: foreign accounts can trigger reporting

One of the most commonly missed obligations involves foreign financial accounts.

A person who becomes a "U.S. person" for FBAR purposes may need to file a Foreign Bank Account Report, or FBAR, using FinCEN Form 114. The filing is generally required when the aggregate value of foreign financial accounts exceeds $10,000 at any point during the calendar year.

The threshold is not $10,000 per account.

It is based on the combined maximum value of qualifying foreign accounts. A person with five accounts that each hold $3,000 could exceed the reporting threshold even though no individual account reaches $10,000.

Foreign financial accounts can include more than traditional checking and savings accounts. Depending on the circumstances, they may include:

• •Foreign bank and credit-union accounts.
• •Foreign brokerage and investment accounts.
• •Certain foreign retirement accounts.
• •Accounts held jointly with a spouse or other family member.
• •Accounts over which the person has signature authority.
• •Foreign accounts connected to a business, trust, or family arrangement.

Foreign investments require special care

A foreign bank account is usually easy to recognize. A foreign investment product can be much harder to evaluate.

Foreign mutual funds, pooled investments, insurance-linked savings products, retirement plans, family partnerships, and trust arrangements may be treated differently under U.S. tax law than comparable U.S. products. Some can create complex annual reporting or unfavorable tax results for a U.S. tax resident.

For example, a fund that is marketed as a straightforward retirement or savings investment abroad may be classified as a foreign pooled investment from the U.S. perspective. A policy described as tax-deferred in one country may not receive similar treatment in the United States. A foreign pension may be covered by a treaty—or may not be.

This is where generic tax software and casual advice can be insufficient. The question is not simply, "Does this account earn income?" It may also be:

• •Is this investment account reportable?
• •Is the income taxable annually, deferred, or exempt?
• •Does a tax treaty alter the treatment?
• •Are special information returns required?
• •What happens if the account is sold, transferred, inherited, or closed?
• •Can the product be retained after becoming a U.S. tax resident?

Cross-border estate planning creates another layer

Income tax is only one part of the picture. Foreign citizens with U.S. assets should also consider estate and gift-tax exposure.

The United States uses concepts such as citizenship, residency, domicile, asset location, and ownership structure in ways that can differ from income-tax residency. A person may be treated as a nonresident for income-tax purposes but still have U.S.-situated assets that matter for estate-tax planning.

For a non-U.S. citizen who is not domiciled in the United States, the federal estate-tax exemption for certain U.S.-situated assets can be far smaller than the exemption often associated with U.S. citizens and domiciliaries. The commonly cited threshold is $60,000 of U.S.-situated assets, although a relevant estate-tax treaty may change the outcome.

Assets potentially relevant to this analysis can include U.S. real estate, shares of U.S. corporations, and certain other property connected to the United States. The rules are technical, and asset classification can matter greatly.

Imagine a foreign citizen living abroad who holds a sizeable U.S. stock portfolio and a condominium in the United States. They may assume their estate will be treated the same as that of a U.S. resident investor. That assumption can be dangerous. The estate's exposure, filing requirements, available deductions, and treaty benefits may be very different.

Estate planning also becomes more complex when a spouse or child lives in another country, when beneficiaries have different citizenships, or when the family owns property across borders. A will created in one jurisdiction may not fully address local inheritance rules, probate procedures, marital-property regimes, beneficiary-designation rules, or forced-heirship laws in another.

For families with meaningful assets, cross-border estate planning should coordinate tax advice, legal documents, account titling, beneficiary designations, and the laws of each relevant country.

A practical compliance checklist

The best defense against tax problems is not last-minute filing. It is an organized process.

Compliance is a form of financial protection

The U.S. tax system can be demanding for foreign citizens, but complexity does not have to become a crisis.

Most problems arise not because people are trying to evade tax, but because they assume familiar rules from their home country apply in the United States. They may not realize that days spent visiting family count toward tax residency, that foreign accounts can trigger reporting even when no U.S. tax is due, or that a foreign pension and a U.S. brokerage account may be treated very differently.

The solution is not fear. It is preparation.

A foreign national who understands their tax residency, tracks travel, documents foreign accounts, reviews treaty rights, and works with qualified cross-border professionals is in a much stronger position. They can make decisions with clarity, avoid surprises, and focus on building a life in the United States rather than trying to fix preventable tax issues after the fact.