What is a dual-status alien?
Updated on January 22, 2026
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A dual-status alien/taxpayer is someone who, in a single year, lives in the US long enough to qualify as a resident alien, and lives outside of the US for long enough to qualify as a nonresident alien. Many dual-status taxpayers hold Green Cards or temporary work visas that allow them to live and work in the US for part of the year.
Foreign nationals are generally taxed as either a nonresident alien or a resident alien. If they have maintained both statuses in the same calendar year, they’re taxed as a dual-status alien by the IRS.
In a dual-status year, the tax form you file depends on whether you are considered a resident or nonresident on the last day of the tax year. The IRS uses the substantial presence test to determine whether a foreign national is treated as a US resident for tax purposes.
The substantial presence test
To qualify under the substantial presence test, you must be both:
- Physically present in the US for at least 31 days in the current year.
- Have 183 counted days over the current year and the two prior years.
Counted days are calculated as all days in the current year, one-third of the days in the first prior year, and one-sixth of the days in the second prior year.
Example of a dual-status taxpayer
For example, a Mexican citizen arrives in the US on a H visa on June 1, 2025, and leaves on December 31, 2025. This person meets the substantial presence test based on their US presence during the year, making them a resident alien from June 1 through December 31.
If you are a resident at year-end, you generally file Form 1040. If you are a nonresident at year-end, you generally file Form 1040-NR.
US tax obligations for dual-status aliens
Dual-status aliens will be taxed on income from all sources received during their residence in the US, and only taxed on US-based income they received when they lived abroad. So, for the part of the year you are a nonresident alien, any income sourced outside of the US that is not ‘effectively connected’ to a trade or business in the US is not taxable by the IRS.
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How to file a dual-status tax return
As a dual-status alien, Form 1040-NR will report only your US-sourced income for your period as a nonresident. Form 1040 will report your worldwide income for the period you were a resident.
The IRS requires that the main tax return in a dual-status year is labeled “Dual-Status Return,” and the attached form is labeled “Dual-Status Statement.” Which form is the return and which is the statement depends on your residency on the last day of the tax year:
- If you were a resident on the last day of the year, you file Form 1040 as the Dual-Status Return and attach Form 1040-NR as the Dual-Status Statement.
- If you were a nonresident on the last day of the year, you file Form 1040-NR as the Dual-Status Return and attach Form 1040 as the Dual-Status Statement.
This labeling rule applies whether attaching 1040, 1040-NR, or 1040-SR forms as statements.
Restrictions when filing a dual-status return
If you’re filing a dual-status US tax return for the tax year, the following restrictions apply:
- Dual-status taxpayers can’t claim the standard deduction, even for the portion of the year they are treated as a resident alien.
- You can’t use the head of household Tax Table column or Tax Rate Schedule.
- You can’t file a joint return unless a dual-status alien is married to a US citizen or resident alien who elects to file a joint return.
- As a dual-status taxpayer, you generally can’t claim education credits unless you elect to be taxed as a resident alien instead of being treated as dual-status.
- Personal exemption deductions are currently set to zero under US tax law, including for recent and upcoming tax years.
- A nonresident alien married to a US citizen or resident alien for all or part of the tax year, who doesn’t choose to file jointly, must use the Tax Table or Tax Rate Schedule for married filing separately.
When and where do I file my tax return as a dual-status alien?
If you’re a resident alien on the last day of the tax year, you need to file by April 15, for the year following the close of your tax year.
If you are a nonresident at year-end, Form 1040-NR is generally due by the 15th day of the fourth month (April 15) after the end of the tax year if you received wages subject to withholding, or by the 15th day of the sixth month (June 15) if you did not.
Extensions may be available, but they do not extend the time to pay any tax owed. Filing deadlines may shift if the due date falls on a weekend or legal holiday.
FAQs
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Can a dual-status alien claim the standard deduction?
No. Dual-status taxpayers can’t claim the standard deduction, even for the portion of the year they are treated as a resident alien.
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Which tax form does a dual-status alien file?
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Is a dual-status alien taxed on worldwide income?
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Can a dual-status alien file a joint tax return?
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