That matters for Australians on U.S. work assignments, students, investors with U.S. shares or rental property, and owners of U.S. businesses. Getting the classification wrong changes your return, your withholding and your treaty position.
This guide covers the green card test, the substantial presence test, exceptions, taxable income, filing forms and when to get professional help. Figures are for tax year 2025.
Key Takeaways
- A nonresident alien is a non-U.S. citizen who fails both the green card and substantial presence tests.
- It is a tax label, not a statement about immigration status.
- Nonresident aliens are generally taxed on U.S.-source income; resident aliens report worldwide income.
- Status decides your form (1040-NR or 1040), withholding, deductions and treaty claims.
What Nonresident Alien Means for U.S. Tax Purposes
Tax status is different from immigration status
"Alien" is simply the IRS term for someone who is not a U.S. citizen or national. It says nothing about whether you are lawfully in the country.
Your visa, Australian residence or citizenship are relevant facts. None of them decides U.S. tax residency alone, according to the IRS visa guidance. Certain visa categories do affect which days count toward presence, which we cover below.
Resident alien versus nonresident alien
- Resident aliens generally report worldwide income, like U.S. citizens.
- Nonresident aliens generally report U.S.-source income and income effectively connected with a U.S. trade or business.
The label also affects forms, deductions, credits, withholding, treaty claims and information reporting. U.S. citizens are not technically resident aliens, since they are not aliens, though they also report worldwide income.
Who needs to check
- Australians working temporarily in the U.S.
- Students and exchange visitors
- People with U.S. dividends, interest or rental income
- Anyone providing services in the U.S. or owning U.S. business interests or property
How the IRS Determines Your Tax Residency Status
The green card test
Being a lawful permanent resident at any time in 2025 generally makes you a U.S. resident for tax purposes. Check the dates you obtained, surrendered or lost that status. Where only this test applies, residency generally starts on your first day physically present in the U.S. as a permanent resident.
Residency generally continues until status is formally abandoned or taken away. Moving back to Australia does not end it by itself.
The substantial presence test
For 2025 you must meet both conditions, per IRS Publication 519:
- At least 31 days in the U.S. during 2025.
- At least 183 weighted days across 2025, 2024 and 2023.
The weighting: every 2025 day, one-third of 2024 days and one-sixth of 2023 days. You are generally present on any day you are physically in the U.S. at any time.
Illustration (not tax advice): An Australian consultant spends 120 days in the U.S. in each of 2023, 2024 and 2025. That is 120 + 40 + 20 = 180 weighted days, so the test is not met. Add 10 more days in 2025 and the total reaches 190, so it is met.
Some days do not count, including:
- Regular commuting from Canada or Mexico
- Transit of under 24 hours between two foreign places
- Crew service on a foreign vessel
- Days you could not leave because of a medical condition that arose in the U.S.
Exempt individuals and excluded days
"Exempt" here means certain days are excluded from the count, not that you are free of tax. It covers qualifying foreign-government-related individuals, teachers, trainees, students and some charity-event athletes.
- Students on F, J, M or Q visas generally exclude days for up to 5 calendar years, after which you must show no intent to reside permanently and substantial visa compliance.
- A teacher or trainee generally loses the exclusion if exempt in any part of 2 of the preceding 6 years.
- Claiming it usually requires Form 8843, even when no return is otherwise due.
Closer connection and treaty exceptions
Even if you meet the substantial presence test, you may avoid resident status if you:
- Were in the U.S. fewer than 183 days in 2025
- Had a foreign tax home
- Had a closer connection to one foreign country than to the U.S.
Factors include your home, family, belongings, bank accounts, business activity, driver's licence, voting registration and social ties. You claim this on Form 8840. It is not available to green card holders.
If you are resident under both countries' laws, Article 4 of the U.S.-Australia treaty applies tie-breaker rules (permanent home, personal and economic relations, habitual abode, nationality). Disclose a treaty position on Form 8833.
A practical checklist
Gather before you file:
- Passport, visa and any green card records
- U.S. entry and exit dates
- Prior-year returns and income documents
- Details of your Australian residence
- Treaty-related records
A mid-year status change, overlapping tests or patchy travel history justify a professional review before filing.
How Nonresident Alien Status Affects U.S. Taxation
U.S.-source versus foreign-source income
Sourcing follows simple rules, according to IRS Publication 515:
- Wages and services: where the work is physically performed
- Dividends: the paying corporation's country
- Interest: the payer's residence
- Rent: the property's location
So a U.S. wage is U.S.-source, while pay for work done in Australia is generally not. A U.S. scholarship is sourced by the payer; a degree candidate may exclude amounts used for tuition, fees, books and required supplies.
Effectively connected income
ECI is income tied to a U.S. trade or business, such as pay for services performed in the U.S. or certain business and rental income. After allowable deductions, it is taxed at graduated rates.
FDAP income and withholding
FDAP (fixed, determinable, annual or periodic) income covers passive items like dividends, interest, rents and royalties. The general withholding rate on U.S.-source FDAP that is not ECI is 30% of gross income, unless a treaty or Internal Revenue Code exception reduces it.
Forms you may encounter:
- W-8BEN: you give it to the payer, not the IRS, to document foreign status and treaty claims
- W-8ECI: documents income you claim as effectively connected
- 1042-S: the payer's report of your withheld U.S.-source income
Not every form applies to every person.
Deductions, credits and treaty benefits
- No standard deduction for most nonresident aliens (a narrow India-treaty student exception exists)
- Itemised deductions generally need to relate to ECI
- No personal exemptions since 2018
- Generally no earned income credit or education credits
Australian cross-border considerations
The U.S.-Australia treaty (signed 1982, amended by a 2001 Protocol) can cap withholding. These are ceilings, not blanket exemptions:
| Income | Treaty ceiling |
|---|---|
| Dividends | 15% generally; 5% or 0% for qualifying corporate holders |
| Interest | 10%, with some exemptions |
| Royalties | 5% |
Beneficial ownership, permanent establishment and limitation-on-benefits rules all affect the result. Under Article 7, business profits are generally taxable only in the residence country unless there is a U.S. permanent establishment.
U.S. treatment does not settle Australian tax. The ATO says Australian residents must declare foreign income. A foreign income tax offset may be available once foreign tax is paid. Confirm the treaty article for your specific income before relying on it.
Filing Responsibilities and Key Tax Forms
When a nonresident alien may need to file
- Anyone engaged in a U.S. trade or business in 2025 generally must file, even with no income or only exempt income.
- Otherwise, you generally file when you have U.S.-source income and not all tax was withheld.
- You may also file to claim a refund or treaty position.
Having no income does not always end your obligations. Students and exchange visitors claiming excluded days may still need Form 8843.
Form 1040-NR
Nonresident aliens who must file use Form 1040-NR, not Form 1040. Form choice depends on your residency status, not citizenship. Form 1040-NR can be e-filed.
- Due April 15, 2026 if you received wages subject to U.S. withholding
- Due June 15, 2026 if you did not
- Form 4868 gives an automatic six-month filing extension, but tax is still due by the original date
Supporting forms
| Form | Role |
|---|---|
| W-8BEN / W-8ECI | Withholding documentation given to payers |
| 1042-S, W-2, 1099 | Income and withholding statements |
| 8840 / 8843 | Closer connection and excluded-day claims |
| 8833 | Treaty position disclosure |
| W-7 | ITIN application |
Receiving a form does not determine your residency. Information forms report payments; the annual return determines your tax.
ITIN
Use Form W-7 to apply for an ITIN, generally filed with your return. Acceptance Agents can help with document verification.
Records to keep
- Travel dates, passport stamps and a day-by-day U.S. presence log
- Visa and immigration documents, and green card records
- U.S. income statements and withholding forms
- Foreign tax paid, treaty claims and rental or business expenses
- Prior returns
Reconcile your log with immigration records. IRS guidance in Publication 583 suggests keeping records at least 3 years, or 6 years if more than 25% of gross income was omitted.
Consequences of the wrong status
Filing as a resident instead of a nonresident, or the reverse, can mean misreported income, missed treaty benefits, excess tax, interest and penalties. The failure-to-file penalty is 5% per month, capped at 25%. File Form 1040-X to correct the error.
Special Situations, Common Mistakes, and Practical Next Steps
Situations requiring extra care
- Dual-status years: you may be resident for part of the year and nonresident for the rest. Don't apply one label to the whole year.
- Nonresident spouses: if married to a U.S. citizen or resident, you may elect full-year resident treatment under section 6013(g).
- First-year choice: certain people can elect resident treatment for part of a year, with a 31-consecutive-day and 75% presence requirement.
- Green card holders, students and heavy U.S. travellers: each have their own rules.
Common mistakes
- Assuming every non-citizen is a nonresident alien
- Counting days without the weighted formula
- Treating a visa label as a tax answer
- Ignoring U.S.-source income not shown on a familiar form
- Claiming a treaty exemption, deduction or foreign tax credit without confirming eligibility and keeping documents
When to seek cross-border help
Get a review if you have U.S. business activity, property, investment income, a green card, overlapping residency rules or treaty questions.
VJM Global prepares Form 1040-NR returns, treaty disclosures on Form 8833, withholding compliance and ITIN applications for foreign nationals with U.S.-source income. The firm also supports cross-border businesses, including those with India operations.
It supports your filing but does not replace an IRS determination.
Frequently Asked Questions
How do I know if I am a nonresident alien or a resident alien?
You are a resident alien if you meet the green card test or substantial presence test, unless an exception applies. Otherwise you are generally a nonresident alien. Check the current IRS rules each year.
What is a nonresident alien?
A non-U.S. citizen or national who does not meet the U.S. tax residency tests. It is a tax classification, not an immigration status.
Does having a green card make you a resident or nonresident alien?
Generally a resident for tax purposes. Start dates, abandonment and dual-status years need closer review.
Are U.S. citizens resident aliens?
No. Citizens are not aliens. They generally report worldwide income under similar rules.
How do I answer "Are you a nonresident alien?"
Apply your U.S. tax residency status, not your visa or citizenship. Answer the form on that basis.
Do non-citizens have to pay U.S. taxes?
They may owe tax on U.S.-source or effectively connected income. The result depends on residency, income type, treaty provisions and withholding.
