Below is a comprehensive, practical guide that explains the rules, shows how to determine your status, lists the common tax consequences, and gives step‑by‑step actions you can take to comply with U.S. tax law.
Summary definition
– A nonresident alien (NRA) is a foreign national who is not a U.S. citizen and who does not meet either the Green Card test or the Substantial Presence test for U.S. residency for tax purposes. Nonresident aliens generally pay U.S. tax only on certain U.S.‑source income. (Internal Revenue Service (IRS), Publication 519; Investopedia summary)
1) How U.S. tax residency is determined
– Green Card test: You are a resident for tax purposes if you are a lawful permanent resident of the U.S. at any time during the calendar year (you “have a green card”).
– Substantial Presence test: You meet the test and are treated as a resident if:
• You were physically present in the U.S. for at least 31 days in the current year, and
• The total of: (all days present in the current year) + (1/3 of days present in the previous year) + (1/6 of days present two years before the current year) is 183 days or more.
– Practical tip: Count actual days present (partial days usually count). There are exceptions (e.g., some days as a commuter, certain medical/trainee days, and exemptions for certain visa types such as some students and teachers). See IRS Publication 519 for exception rules and examples.
Quick example of the substantial presence calculation:
– If you were in the U.S. 120 days in each of three years:
• Current year = 120
• Previous year = 120 × 1/3 = 40
• Two years earlier = 120 × 1/6 = 20
• Total = 180 → below 183 → not a resident under the test.
2) Tax treatment of nonresident aliens
– Scope of taxation:
• Resident aliens: taxed like U.S. citizens — worldwide income taxable.
• Nonresident aliens: generally taxed only on U.S.‑source income and income effectively connected with a U.S. trade or business.
– Effectively connected income (ECI): income that is effectively connected with a U.S. trade or business (wages from U.S. employment, business income, certain investment income connected to a U.S. trade or business). ECI is taxed at the same graduated rates that apply to U.S. residents and citizens.
– Fixed, Determinable, Annual, or Periodical income (FDAP) not effectively connected: typically passive U.S.-source items (interest, dividends, rents, royalties) that are not ECI are generally subject to a flat 30% tax withholding rate (or a lower treaty rate where applicable).
– Tax treaties: Tax treaty provisions between the U.S. and the foreign national’s home country can reduce or eliminate U.S. tax on certain types of income. Treaty claims generally require specific documentation (e.g., Form W‑8BEN to claim a treaty rate to the withholding agent, and disclosure on the tax return if filing).
– Social Security/Medicare: Many nonresidents working in the U.S. are subject to FICA unless an exemption applies (e.g., some students/teachers on certain visas under totalization agreements).
3) Filing obligations and forms
– Main federal forms:
• Form 1040‑NR (U.S. Nonresident Alien Income Tax Return) — the primary tax return used by nonresident aliens.
• Historically, Form 1040‑NR‑EZ was a simplified return for some filers; check the IRS website for current form availability and guidance.
– Information and withholding forms:
• Form W‑8BEN: used by foreign persons to certify foreign status and claim treaty benefits to withholding agents.
• Form 1042‑S: statements provided to foreign persons showing amounts paid and taxes withheld for FDAP and other payments.
– Filing deadlines (general guidance):
• If you received wages subject to U.S. income tax withholding, the tax return is generally due the same time as for U.S. residents (typically in mid‑April; exact date varies each year).
• If you did not receive wages subject to withholding, a June due date has applied in the past for nonresident aliens. Because deadlines can change, always confirm the current year’s due date on the IRS website.
– ITIN: If you are required to file a U.S. tax return and are not eligible for a Social Security number, you must apply for an Individual Taxpayer Identification Number (ITIN) using Form W‑7 and attach documents proving identity and foreign status.
4) Departing the U.S. — special filing and compliance steps
– Final return: If you depart the U.S. and will no longer be a U.S. resident for tax purposes, you may need to file a final Form 1040‑NR for the year that you departed.
– Form 1040‑C (U.S. Departing Alien Income Tax Return): a special departure compliance form used in some circumstances to obtain a “certificate of compliance” (sometimes called a sailing or departure permit) showing you met tax obligations up to the date of departure. Filing Form 1040‑C does not substitute for filing an annual Form 1040‑NR when required.
– Keep records of arrival/departure dates (I‑94 entries, boarding passes, passport stamps), pay stubs, Forms 1042‑S and 1099s, and copies of returns and treaty claim documentation. These support both residency tests and the tax return.
5) Special categories and common exceptions
– Students and scholars (F, J, M, Q visas): often exempt from counting days for the substantial presence test for limited periods; they may remain nonresident aliens for a number of years depending on visa and prior U.S. presence. Check Publication 519 for specifics.
– Teachers, trainees, researchers: special rules and treaty provisions may apply.
– Medical patients: presence for medical treatment can have special treatment regarding substantial presence counting.
– Dual-status aliens: in some years you may be both a resident and a nonresident for different parts of the year; special tax rules apply and require careful filing.
6) Practical step‑by‑step checklist (what to do now)
1. Determine your residency status for the tax year:
• Check Green Card status and apply the substantial presence test (use arrival/departure records).
2. Gather documentation:
• Passport, visa, I‑94, travel dates, pay stubs, Forms W‑2, 1099, 1042‑S, bank statements, property/rental records, and any home‑country tax documents.
3. Identify the types and sources of your income:
• Wages, business income, rental income from U.S. property, interest/dividends, scholarships, etc.
• Classify each as ECI or FDAP (or foreign‑source).
4. Check whether a tax treaty applies:
• If applicable, determine allowed benefits and documentation required (e.g., Form W‑8BEN).
5. Obtain an ITIN if you need to file and don’t have an SSN (Form W‑7).
6. Prepare and file the correct tax return:
• File Form 1040‑NR (or other forms as directed by current IRS instructions).
• Include treaty statements where required.
7. Pay any taxes due and confirm withholding credits:
• If tax was withheld (Forms W‑2, 1042‑S), reconcile on your return; claim refunds if withholding exceeds tax liability.
8. If departing the U.S., consider Form 1040‑C and obtain certificate of compliance if required:
• Consult the IRS instructions and, if needed, an international tax professional.
9. Keep records for at least several years in case of IRS queries.
7) Common pitfalls and practical notes
– Miscounting days: incorrect day counts can misclassify residency and create unexpected tax liabilities.
– Ignoring treaty benefits: failing to claim a treaty exemption or reduced rate can result in unnecessary withholding.
– Thinking state tax is the same as federal: many states have separate residency rules and state filing obligations — check state tax agencies.
– Not applying for an ITIN early enough: ITIN processing can delay refunds or filing.
8) When to get professional help
– If you have business income, complex treaty situations, rental property, dual‑status years, or large withholding/refund issues, consult a tax professional experienced in international tax law and nonresident filings.
Key IRS references (for authoritative detail and current forms/deadlines)
– IRS Publication 519, U.S. Tax Guide for Aliens — residency tests, exceptions, ECI/FDAP rules, examples.
– IRS Topic No. 851, Resident and Nonresident Aliens.
– Instructions for Form 1040‑NR and Form 1040‑C.
– For withholding and treaty claims, see Form W‑8BEN guidance and Form 1042‑S instructions.
Sources
– IRS Publication 519, U.S. Tax Guide for Aliens (see residency tests and taxation of nonresident aliens).
– IRS Topic No. 851: Resident and Nonresident Aliens.
– IRS forms & instructions: Form 1040‑NR and Form 1040‑C instructions; Form W‑8BEN; Form W‑7 (ITIN).
– Investopedia summary: “Nonresident Aliens” (background summary and examples).
– Walk through a personalized residency test using your exact travel dates and visa history.
– Provide a short checklist customized for a student, teacher, or employee.
– Draft the parts of a Form 1040‑NR return (lines checklist) you’ll need to fill out, given your income types.