For US federal income tax, a resident alien is generally someone who meets the green card test or substantial presence test. A nonresident alien generally meets neither, subject to exceptions and elections. Your visa label, citizenship and tax residency are different classifications.
Work out your status for the particular tax year before choosing tax software, certifying a bank form or filing a return. A temporary visa holder can be a US tax resident; a newly arrived international student can be a tax nonresident.
Resident alien versus nonresident alien: the practical difference
Resident alien: generally taxed like a US citizen on worldwide income during the resident period. This can include foreign bank interest, rental income and investment income even when the money stays abroad. Form 1040 is generally the individual income-tax return. Deductions, credits and filing status depend on their own eligibility rules.
Nonresident alien: generally taxed on income effectively connected with a US trade or business and certain US-source income that is not effectively connected. Form 1040-NR is generally used when a return is required. Not every nonresident owes a flat 30% on all income; effectively connected income is generally subject to graduated rates, while different rules and treaty provisions apply to other income.
IRS Topic 851 and Publication 519 provide the framework. State tax residency can differ from federal treatment.
Step 1: check the green card test
Being a lawful permanent resident generally meets the green card test. Residency starting and ending dates, treaty positions and special cases affect which period is treated as resident. Receiving a card during the year does not automatically mean the whole year is treated identically.
If you do not meet this test, check substantial presence. Do not assume that having no green card means you are a nonresident for tax.
Step 2: calculate the substantial presence test
Under the IRS substantial presence test, you generally need both:
- At least 31 days physically present in the current year.
- At least 183 weighted days across the current year and the preceding two years.
The weighted calculation is all countable days this year + one-third of countable days last year + one-sixth of countable days two years ago.
Example: 120 countable days in each of three consecutive years produces 120 + 40 + 20 = 180, so that pattern does not meet the 183-day component. Spending fewer than 183 days in the current year alone does not settle the question because previous years can count.
Start with actual travel records, then apply the exclusions. Certain commuting, transit, medical-condition and exempt-individual days have separate rules. Do not count every I-94 day automatically without considering them.
F-1 and J-1 student exceptions: what “exempt” means
For qualifying students in F, J, M or Q status, “exempt individual” means certain days are excluded from the substantial presence calculation. It does not mean exempt from all US income tax.
The student exclusion generally covers up to five calendar years, with prior exempt years and compliance with status relevant. A partial calendar year can count as a year. Beyond that period, specific exceptions may be available, but continuing student status alone does not automatically preserve the exclusion. J-1 teachers and trainees have different rules from J-1 students. Read the IRS student guidance.
If you exclude days under the relevant exempt-individual rules, Form 8843 generally must be filed even when no income-tax return is required. Whether Form 1040-NR is also required depends on your income and circumstances. See our F-1/J-1 filing guide.
Form 1040 or 1040-NR—and what about dual status?
A full-year resident generally uses Form 1040. A nonresident with a filing requirement generally uses Form 1040-NR. Nonresidents generally cannot claim the standard deduction or file jointly, although treaty provisions and valid elections can change particular results.
An arrival, departure or status change can produce a dual-status year, but it does not always do so. An August arrival with no relevant prior US presence does not automatically become a resident by December. Calculate the tests, residency start date and any first-year or spousal election before choosing a filing method.
A full-year resident election can bring foreign income into the US tax calculation. Review the consequence before choosing it simply to obtain a joint return or deduction. See our first-year dual-status guide.
Foreign income, double taxation and account reporting
Tax residents should review worldwide income even if no US information form arrives. Foreign tax credits or treaty relief may reduce double taxation, but relief is not automatic and state treatment can differ.
Account reporting is separate from tax on income. FinCEN's FBAR rules generally require a US person with reportable foreign accounts to file if their aggregate value exceeds $10,000 at any time during the year. This is not a $10,000 income exemption. Form 8938 has separate thresholds and requirements.
Before filing: a short checklist
1. Gather passport travel history, I-94s, green card dates and prior visa/status records.
2. Calculate countable days and document exclusions for each year.
3. Check treaty, closer-connection, dual-status and election questions where relevant.
4. List US and foreign income and review foreign-account reporting separately.
5. Use filing support that handles your actual status, and retain the calculation with your return.
Does an H-1B or H-4 visa automatically mean resident alien?
No. Apply the tax tests and relevant dates. The same visa category can produce different results in an arrival year and a later year.
Does becoming a tax resident grant immigration rights?
No. Tax residency does not grant permanent residence or work authorization.
Editorial review: October 17, 2026. General federal-tax education; individual and state rules can require professional review.