Understanding tax filing for immigrants starts with an important concept: your U.S. tax responsibilities depend in part on your residency status for federal tax purposes.
U.S. tax law generally classifies individuals who are not U.S. citizens as resident aliens or nonresident aliens. As a result, that tax classification affects which income must be reported, which tax return may be required and which rules apply.
Therefore, determining your tax residency status should come before deciding how to file. Although immigration terminology and federal tax terminology are related in some situations, they are not always the same.
START WITH TAX RESIDENCY
Immigration Status and Tax Residency Are Not the Same Question
For federal income tax purposes, the IRS generally classifies a non-U.S. citizen as either a resident alien or a nonresident alien. In some years, however, a person can also have dual-status tax treatment.
A lawful permanent resident generally satisfies the Green Card Test for federal tax residency. However, a person without a green card may still become a U.S. resident for tax purposes by meeting the Substantial Presence Test.
Consequently, you should not determine your filing requirements only from a visa label or immigration description. Instead, review the federal tax residency rules that apply to your circumstances.
Once tax residency is established, you can then determine which income and filing rules generally apply.
FIRST QUESTION
Resident or nonresident?
For tax purposes, this distinction can change how you file.
In particular, the answer can affect the form you use, the income you report and the tax provisions available to you.
TWO IMPORTANT TESTS
How the IRS Determines Tax Residency
Two federal tests are especially important for determining whether a non-U.S. citizen is treated as a U.S. resident for tax purposes.
However, exceptions and special rules can apply, so the tests should be evaluated carefully.
01
Green Card Test
Generally, a lawful permanent resident of the United States meets the Green Card Test for federal income tax purposes. However, residency starting and ending dates can still matter, particularly during the year a person enters or leaves U.S. tax residency.
02
Substantial Presence Test
A person may also become a U.S. resident for tax purposes based on physical presence. Generally, the test requires at least 31 days of presence during the current year and a weighted total of 183 days during the current year and previous two years.
However, not every day of physical presence necessarily counts. For example, special rules can apply to certain students, teachers, trainees and other individuals.
FORM 1040 OR 1040-NR?
Your Tax Residency Can Determine Which Return You File
Resident and nonresident aliens generally do not use the same federal income tax return. Therefore, identifying your tax residency is an important step before filing.
Resident Aliens: Form 1040
Resident aliens generally follow the same federal income tax rules as U.S. citizens. Therefore, they generally use Form 1040 and report income under the rules applicable to U.S. tax residents.
In addition, resident aliens can generally use the filing statuses available to U.S. citizens and may qualify for applicable deductions and credits when the requirements are satisfied.
However, special rules can arise during the year a taxpayer first becomes or stops being a U.S. tax resident.
Nonresident Aliens: Form 1040-NR
A nonresident alien who has a federal filing requirement generally uses Form 1040-NR, U.S. Nonresident Alien Income Tax Return.
In contrast, the rules for filing status, deductions, credits and taxable income can differ from those that apply to a full-year U.S. tax resident.
Consequently, filing a regular Form 1040 simply because you lived or worked in the United States can be incorrect when you remain a nonresident alien for federal tax purposes.
WORLDWIDE INCOME
U.S. Tax Residents Generally Report Income From Around the World
One of the most important rules for immigrants who become U.S. tax residents involves income earned outside the United States.
Resident aliens are generally taxed in the same manner as U.S. citizens. As a result, they generally must report worldwide income, not only money earned from a U.S. employer.
For example, reportable income can potentially include foreign wages, interest, dividends, rental income and other taxable income from outside the United States.
Therefore, having money paid or held in another country does not automatically remove it from U.S. tax reporting when you are a U.S. tax resident.
DON’T OVERLOOK
Income From Your Home Country
Did you receive wages outside the United States?
Perhaps you have a foreign bank account that earns interest.
You may also own rental property outside the country.
In addition, consider whether you received dividends or other investment income abroad.
For a U.S. tax resident, foreign-source income may still belong on the U.S. tax return.
NONRESIDENT TAXPAYERS
Nonresidents Follow Different Income Rules
Nonresident aliens are generally subject to U.S. federal income tax on U.S.-source income and certain income effectively connected with a U.S. trade or business.
Therefore, determining the source and type of income becomes especially important.
Effectively Connected Income
Income effectively connected with a U.S. trade or business is generally taxed after allowable deductions at graduated rates. In turn, nonresident taxpayers report applicable effectively connected income on Form 1040-NR.
Other U.S.-Source Income
By comparison, certain U.S.-source fixed, determinable, annual or periodical income that is not effectively connected with a U.S. trade or business can be subject to different tax rules, including a 30% statutory rate or a lower applicable treaty rate.
Income Source Matters
For example, compensation for personal services is generally sourced based on where the services are performed, while rent from real property is generally sourced according to the property’s location.
SSN & ITIN
What if You Don’t Qualify for a Social Security Number?
Some taxpayers have a U.S. federal tax filing or reporting requirement but are not eligible to receive a Social Security number. In that situation, an Individual Taxpayer Identification Number may be relevant.
What Is an ITIN?
An ITIN is a tax processing number issued by the IRS to certain individuals who need a U.S. taxpayer identification number for federal tax purposes but are not eligible for a Social Security number.
For example, an ITIN can be used on applicable federal tax returns and other tax documents. Individuals generally apply using Form W-7 and must meet the applicable documentation requirements.
However, taxpayers who are eligible for an SSN should follow the Social Security number process rather than applying for an ITIN.
What an ITIN Does Not Do
An ITIN is issued for federal tax purposes. However, it does not provide authorization to work in the United States.
In addition, obtaining an ITIN does not change a person’s immigration status or provide eligibility for Social Security benefits.
Therefore, treat an ITIN as a tax identification number, not as an immigration document or employment authorization.
FOREIGN ACCOUNTS & ASSETS
Foreign Financial Accounts Can Create Additional Reporting
Reporting foreign income is not always the end of a U.S. taxpayer’s international reporting responsibilities.
In addition, certain foreign financial accounts and assets can trigger separate information-reporting requirements.
FBAR
Certain U.S. persons with financial interests in or signature authority over foreign financial accounts may have to file FinCEN Form 114, commonly known as the FBAR, when the applicable aggregate account-value threshold is exceeded.
Form 8938
Separately, certain taxpayers with specified foreign financial assets may have a Form 8938 filing requirement when the applicable thresholds are met.
The Requirements Are Not Identical
FBAR and Form 8938 are separate reporting regimes. Consequently, filing one does not automatically satisfy a requirement to file the other.
Therefore, if you have bank, investment or other financial accounts outside the United States, mention them during tax preparation rather than assuming they are irrelevant because they are located abroad.
FAMILY & FILING
A Spouse or Dependent Outside the United States Can Affect Your Return
Family situations can make an immigrant’s tax return more complicated. For example, one spouse may be a U.S. tax resident while the other remains a nonresident alien.
In certain circumstances, spouses may be able to make an election to treat a nonresident spouse as a U.S. resident for federal income tax purposes. However, that choice has consequences, including the application of U.S. tax rules to worldwide income.
Dependents can also present identification and eligibility questions. In addition, tax benefits have their own requirements, and an ITIN does not automatically make a person eligible for every credit.
Therefore, review filing status, spouse information and dependent eligibility together instead of treating them as separate questions.
BEFORE YOU FILE
Tell Your Tax Preparer About:
✓ Your date of entry into the United States
✓ Green card or applicable visa information
✓ Days spent inside and outside the United States
✓ Information about your spouse’s tax residency
✓ Income earned outside the United States
✓ Details about foreign financial accounts or assets
✓ SSNs or ITINs for applicable family members
Together, these details can affect the correct filing approach.
YEAR OF ARRIVAL OR DEPARTURE
Your First or Last Year Can Be More Complicated
A taxpayer can be a nonresident for part of a year and a resident for another part.
In that case, the year is generally referred to as a dual-status tax year.
Residency Starting Dates Matter
When a person first satisfies the rules for U.S. tax residency, the date on which residency begins can affect which income is subject to U.S. taxation during that year.
Dual-Status Rules Differ
Dual-status taxpayers face restrictions and filing procedures that differ from those of full-year resident taxpayers. For example, a dual-status taxpayer generally cannot use the standard deduction, subject to applicable rules and treaty considerations.
Don’t Guess Based on December 31
Your status at the end of the year does not necessarily tell the complete story of the entire tax year. Instead, review when residency began or ended and whether any elections or exceptions apply.
TAX PREPARATION
What Documents Should You Bring to Tax Preparation?
Organizing both U.S. and foreign information can make it easier to determine the correct filing status and reporting requirements.
Identity & Residency Information
Bring your Social Security number or ITIN, as applicable. In addition, provide information needed to evaluate tax residency, including relevant immigration documentation and dates of physical presence in the United States.
If your spouse or dependents live outside the United States, provide their applicable identification and residency information as well.
Finally, mention any major change in residency or immigration circumstances during the tax year.
Income & Financial Information
First, gather U.S. income forms such as Forms W-2 and 1099. If you are a U.S. tax resident, also organize records of applicable income earned outside the United States.
Next, gather information about foreign bank, investment and other financial accounts when relevant.
Finally, bring prior-year U.S. tax returns if available. They can provide important context about previous residency positions, elections, carryovers and identification numbers.
COMMON QUESTIONS
FAQ About Tax Filing for Immigrants
These answers cover several common federal tax questions for taxpayers who are not U.S. citizens.
Filing requirements depend on tax residency, income and other circumstances. Generally, U.S. resident aliens follow the federal filing rules that apply to U.S. citizens. By contrast, nonresident aliens follow different rules and may need to file Form 1040-NR when the applicable filing requirements are met.
Yes. A person who does not have a green card may still qualify as a U.S. resident for federal tax purposes by meeting the Substantial Presence Test. However, exceptions and special rules can apply, so the number and type of days present in the United States should be reviewed carefully.
If you have a federal tax purpose for an identification number but are not eligible for an SSN, you may qualify for an ITIN. In that case, the IRS issues ITINs for federal tax purposes. However, an ITIN does not provide employment authorization or change immigration status.
Generally, yes. U.S. resident aliens are generally taxed in the same manner as U.S. citizens and must report worldwide income. However, additional provisions, including foreign tax credits or treaty rules, may affect the ultimate U.S. tax treatment.
Generally, a nonresident alien who has a U.S. federal income tax filing requirement uses Form 1040-NR rather than the regular Form 1040. However, elections, residency changes and other circumstances can alter the filing analysis.
Need Help Understanding Your U.S. Tax Filing Requirements?
Tax filing for immigrants can involve residency tests, ITINs, foreign income, family members outside the United States and additional international reporting requirements.
Therefore, ASB Tax & Accounting can help you organize your tax information and prepare your return based on your individual tax circumstances.
We serve individuals and families in Oxnard and surrounding Ventura County communities. In addition, assistance is available in English and Spanish.
Last reviewed: September 2026. Federal tax residency and international reporting requirements depend on individual circumstances. Therefore, this article provides general tax information and does not provide immigration or individualized tax advice.
