Resident vs Nonresident Alien: Filing Requirements and Tax Obligations

(UNITED STATES) The Internal Revenue Service is reminding foreign taxpayers that filing season rules differ sharply depending on whether they are treated as a resident alien or a nonresident alien for U.S. tax purposes. Thousands of nonresident aliens work, own property, or earn investment income in the United States each year, and many must file Form 1040-NR. Most U.S.-source income received by a nonresident is subject to a 30% withholding tax, though tax treaties can reduce or remove that amount.

Who must file and key deadlines

A nonresident alien must file <a href="https://www.irs.gov/forms-pubs/about-form-1040-nr">Form 1040-NR</a> if any additional tax is due or if they are engaged in a trade or business in the United States.

• Nonresidents who only receive income subject to withholding may still need to file if they:
  • seek a refund, or
  • claim a treaty benefit.

Important deadlines:
1. April 15 — for nonresidents who had wages subject to withholding.
2. June 15 — for many nonresident filers with no wage withholding.

Resident aliens follow the same filing rules as U.S. citizens and report worldwide income on <a href="https://www.irs.gov/forms-pubs/about-form-1040">Form 1040</a> or <a href="https://www.irs.gov/forms-pubs/about-form-1040-sr">Form 1040-SR</a>. That includes pay from U.S. and foreign jobs, bank interest, dividends, rental income, and capital gains worldwide, subject to U.S. tax law.

Links to official forms:
– File as a nonresident alien with Form 1040-NR.
– Resident filers use Form 1040 or Form 1040-SR.

Resident vs. nonresident tests — overview

Under IRS rules, a taxpayer who is not a U.S. citizen must first determine whether they are a resident alien or a nonresident alien for tax purposes.

• A person is a resident alien if they meet either the Green Card Test or the Substantial Presence Test.
• Otherwise, they are a nonresident alien, unless a tax treaty deems them a resident of a treaty country for tax purposes.

Green Card Test

• You are a lawful permanent resident of the United States at any time during the year and did not take treaty steps to be treated as a resident of another country.
• In most cases, holding an alien registration card (a “green card”) meets this test.

Substantial Presence Test

You are treated as a U.S. resident if:
– You were physically present in the U.S. for at least 31 days during the current year, and
– You were present for 183 days over the 3-year period that includes the current year and the two years before it, counted as:
– all days in the current year,
– one-third of the days in the first prior year,
– one-sixth of the days in the second prior year.

Notes on the test:
– “United States” covers all 50 states and the District of Columbia, plus territorial waters and certain adjacent submarine areas where the U.S. has rights under international law.
– It does not include U.S. possessions and territories or U.S. airspace.

Example:
– If you spent 120 days in the U.S. in each of 2022, 2023, and 2024, the 3-year count is:
– 120 days (2024) + 40 days (one-third of 120 for 2023) + 20 days (one-sixth of 120 for 2022) = 180 days.
– In that scenario you would not meet the substantial presence test.

Filing forms and sourcing rules

• Resident aliens file <a href="https://www.irs.gov/forms-pubs/about-form-1040">Form 1040</a> or <a href="https://www.irs.gov/forms-pubs/about-form-1040-sr">Form 1040-SR</a> and report worldwide income.
• Nonresident aliens file <a href="https://www.irs.gov/forms-pubs/about-form-1040-nr">Form 1040-NR</a>, follow special sourcing rules, and are generally taxed only on U.S.-source income.

According to analysis by VisaVerge.com, the determination between resident and nonresident status affects:
– filing status,
– availability of credits,
– which forms and schedules to use.

Treaty rules can change outcomes for nonresidents. The United States has income tax treaties with many countries that may reduce or eliminate U.S. tax on wages, pensions, interest, dividends, royalties, and capital gains. Each treaty has its own terms, so taxpayers must check the exact article that applies to their type of income.

For treaty texts and guidance, see: IRS guidance for international taxpayers.

Election to be treated as a resident (married to U.S. citizen or resident)

A nonresident alien married to a U.S. citizen or resident alien may elect to be treated as a U.S. resident for the entire year. This election:

• Allows a joint filing on <a href="https://www.irs.gov/forms-pubs/about-form-1040">Form 1040</a> or <a href="https://www.irs.gov/forms-pubs/about-form-1040-sr">Form 1040-SR</a>.
• Can open access to deductions and credits not available on <a href="https://www.irs.gov/forms-pubs/about-form-1040-nr">Form 1040-NR</a>.

All of the following must be true to make the election:
– You are married.
– Your spouse was a U.S. citizen or resident alien on the last day of the tax year.
– You file a joint return for the year of the election.

If you make this election:
– You must report worldwide income for the whole year.
– You must keep records needed to figure the tax.
– After the initial election year, couples may choose to file jointly or separately in later years.

Dual-status years and transitional rules

Many newcomers face a dual-status tax year — the year they arrive or depart — when they are a nonresident for part of the year and a resident for the rest. Key points:

• Each part of the year follows different tax rules.
• Income must be split based on the period of status.
• If you become a U.S. resident, you remain a resident until you leave the United States, though treaty positions or later facts may affect status in a future year.

Withholding and reconciliation

Withholding rules remain central for nonresident filers:

• Most U.S.-source fixed or determinable annual or periodical income (interest, dividends, rents, royalties) paid to a nonresident alien is subject to 30% withholding, unless a treaty reduces the rate.
• Workers with U.S. wages typically face wage withholding through their employers.
• Filing <a href="https://www.irs.gov/forms-pubs/about-form-1040-nr">Form 1040-NR</a> is the method to:
  • claim treaty benefits,
  • reconcile withheld tax with actual tax due,
  • receive refunds.

Practical stakes, recordkeeping, and professional help

For families and employers, the consequences are practical and immediate:

• International students with part-time jobs, visiting researchers on short stays, seasonal workers, and property owners with U.S. rental income often need to determine status and file correctly.
• Small mistakes — like claiming the wrong status, using the wrong form, or missing a deadline — can delay refunds or trigger notices.

Tax professionals stress careful recordkeeping. Recommended items to keep:
– travel calendars,
– copies of visas and I‑94 records,
– wage statements and 1099s,
– detailed notes on foreign income.

These records support the substantial presence calculation, treaty positions, and any election to be treated as a resident.

When in doubt:
1. Review the official instructions for Form 1040-NR, Form 1040, and Form 1040-SR.
2. Consider advice from a qualified tax professional experienced in cross‑border cases.

Key takeaway: Determining resident vs. nonresident status is the first and most important step for foreign taxpayers in the United States — it affects filing forms, taxable income, withholding, treaty benefits, and eligibility for credits and deductions.