What "dual-status" means
You are a dual-status taxpayer when you are both a U.S. resident and a nonresident in the same tax year. It refers only to your tax residency, not your citizenship or visa. The most common dual-status years are the year you arrive in the U.S. and the year you leave.
For a dual-status year, you split the year in two and apply different rules to each part.
| Part of the year | What U.S. tax applies to |
|---|---|
| While you are a U.S. resident | Income from all sources — U.S. and foreign (worldwide income) |
| While you are a nonresident | U.S.-source income, and income effectively connected with a U.S. trade or business. Foreign income not connected with a U.S. business is generally not taxable. |
When does your residency start?
If you were not a U.S. resident at any time during the previous year, your residency starts on your residency starting date, and you are a nonresident before it:
- Substantial presence test: generally the first day you are present in the U.S. during the year. You may disregard up to 10 days of earlier presence if you can show a closer connection to a foreign country where you had your tax home on those days — this requires a signed statement.
- Green card test: the first day in the year you are present in the U.S. as a lawful permanent resident.
- Both tests met: the earlier of the two dates.
If you were a U.S. resident for any part of the previous year and are a resident this year, you are treated as a resident from January 1 — there is no dual-status split for your arrival.
A worked example
Lin lived and worked in Taiwan until May 2025, arrived in the U.S. on an H-1B on June 1, 2025, and stayed for the rest of the year. She was not a U.S. resident in 2024 and meets the substantial presence test for 2025.
| Period | Status | Taxed by the U.S. |
|---|---|---|
| January 1 – May 31, 2025 | Nonresident | Only U.S.-source income — her Taiwan salary for this period is generally not taxable |
| June 1 – December 31, 2025 | Resident | All income, including any Taiwan interest or rent received after June 1 |
Because she is a resident on December 31, Lin files Form 1040 marked "Dual Status Return" (using the new "Other" box at the top of the 2025 form), with a dual-status statement for the nonresident months. She must file it on paper — dual-status returns for 2025 can't be e-filed.
Restrictions on a dual-status return
| Rule | Dual-status return |
|---|---|
| Standard deduction | Not allowed — you can itemize allowable deductions |
| Head of household | Cannot use the head of household tax table or worksheet |
| Joint return | Not allowed — unless you and your spouse make the full-year resident election |
| Married, nonresident for part of the year, no election | Must use the married filing separately tax rates on income effectively connected with a U.S. business |
| Certain credits (married nonresident) | No earned income credit, credit for the elderly or disabled, or education credits unless you elect to be taxed as a resident jointly with your spouse |
| Dependents | You may be able to claim a dependent |
How to file
| Your status on December 31 | Main return | Attach |
|---|---|---|
| Resident (usually your year of arrival) | Form 1040 — check the "Other" box at the top and write "Dual Status Return" | A statement showing income for the nonresident part — Form 1040-NR may be used, with "Dual Status Stmt" entered in its "Other" box |
| Nonresident (usually your year of departure) | Form 1040-NR — check the "Other" box at the top and write "Dual Status Return" | A statement showing income for the resident part — Form 1040 or 1040-SR may be used, with "Dual Status Stmt" entered in its "Other" box |
The statement must show your name, address, and taxpayer identification number. If you are a resident on December 31, the return is generally due April 15 of the following year. If you are a nonresident on December 31, it is generally due April 15 if you had wages subject to withholding, or June 15 if you did not.
Elections that change the picture
Married? The full-year resident election
If you were a nonresident at the beginning of the year, are a resident (or citizen) at the end, and are married to a U.S. citizen or resident at year end, you and your spouse can choose to be treated as U.S. residents for the entire year and file jointly. The dual-status restrictions no longer apply — but both of you are taxed on worldwide income for the whole year, including the months before you arrived. Single people cannot make this choice. See Nonresident spouse: can we file jointly?
The first-year choice
If you arrive late in the year and do not meet the substantial presence test until the next year, the first-year choice may let you be treated as a resident for part of your arrival year. It has specific day-count requirements; see Substantial Presence Test explained.
Dual-status returns are among the most complex individual returns. Get help if you have a spouse, investments or rental income abroad, a possible tax treaty position, or you are leaving the U.S. permanently.