Dual-status tax year: what you can and cannot claim

What dual status means

Dual status describes tax residency, not citizenship. The publication defines a dual-status tax year as one in which you have been both a resident alien and a nonresident alien. The most common examples are the year you arrive and the year you depart. In those years different rules apply to the resident part and the nonresident part, and the return is built from both.

The year of arrival is the easiest to picture. You become a resident on your residency starting date, which under the substantial presence test is generally the first day you are present in the United States that year. Up to 10 days of presence can be ignored for that purpose if you had a closer connection to, and a tax home in, a foreign country on those days, as long as you file the required statement. The publication’s example is Ivan Ivanovich, who visited January 6 to 10, 2025, kept his tax home in Russia and moved here on March 1; his residency starting date is March 1.

The year split

The calculator above splits a calendar year around the residency starting date. For Ivan, enter 2025 and March 1, 2025: there are 59 days before the start, January 1 through February 28, and 306 days from the start through December 31, out of 365. The split does not decide tax by itself, but it shows how much of the year each regime covers, which helps when estimating whether a dual-status filing is better or worse than alternatives.

A second rule is that residency can run backward. If you were a U.S. resident at any time during the preceding calendar year and are a resident for any part of the current year, you are treated as a resident from the beginning of the current year. The publication’s example is Robert Bach, a Swiss citizen who was a resident in 2024 and returned as a permanent resident on March 5, 2025: his 2025 residency starts January 1, 2025.

Which income is taxed

For the resident part of the year you are taxed on income from all sources. That includes foreign income received while a resident, even if you earned it before arriving. For the nonresident part you are taxed on U.S.-source income and on certain foreign-source income treated as effectively connected with a U.S. business. Foreign income that is not effectively connected and is received while you are a nonresident is not taxable, even if you earned it as a resident.

The two pieces are then combined. Resident-period income plus income effectively connected with a U.S. business in the nonresident period, after allowable deductions, is taxed at the rates that apply to citizens and residents. Income from the nonresident period that is not connected with a U.S. business is taxed at the flat 30% rate or a lower treaty rate, with no deductions allowed against it. See the effectively connected income page for the split between the two kinds.

The restrictions

Four headline restrictions apply to a dual-status return. You cannot use the standard deduction allowed on Form 1040 or 1040-SR, though you can itemize allowable deductions. You cannot use the head of household column or worksheet. You cannot file a joint return, although a separate choice (below) can change that. And for 2025 you cannot e-file; the return is filed on paper.

On rates, a married dual-status taxpayer who does not choose joint filing must use the married filing separately column or worksheet for tax on effectively connected income. The publication allows an exception for married residents of Canada, Mexico or South Korea and for married U.S. nationals who lived apart from their spouse during the last six months of the year; the Form 1040-NR instructions say whether you qualify. Credits are narrower too: you cannot claim the education credits, the earned income credit or the credit for the elderly or the disabled unless you are married and choose to be treated as a resident for all of 2025 by filing jointly with a spouse who is a citizen or resident.

The choice that removes the restrictions

A dual-status alien who is a nonresident at the start of the year and a resident or citizen at the end, and who is married at year-end to a citizen or resident alien who joins in the choice, can choose to be treated as a U.S. resident for the entire year. The couple files jointly, is taxed on worldwide income, and the dual-status restrictions do not apply. The choice can only be made once: neither spouse can make it for a later year, even after separation, divorce or remarriage. A single person cannot make it.

Whether that trade is attractive depends on how much foreign income the household has, since worldwide income comes into the U.S. return for the whole year. That is a reason to weigh the choice carefully before making it, and to see the first-year choice page for the separate election that works without a spouse.

Credits you can still use

The restrictions are not a blanket ban. The publication says a dual-status alien can generally claim credits under the same rules as a resident alien, with the restrictions above. The foreign tax credit is available on Form 1116, the child and dependent care credit is available to married dual-status aliens only if they choose to file jointly or qualify as living apart, and the child tax credit requires a qualifying child and a valid Social Security number issued before the due date including extensions.

Sources

• IRS Publication 519, U.S. Tax Guide for Aliens (2025): Dual-Status Aliens; Chapter 6, Dual-Status Tax Year; Restrictions for Dual-Status Taxpayers; How To Figure Your Tax; Forms To File. Read November 2, 2026.

Edition read: Publication 519 (2025), U.S. Tax Guide for Aliens, for use in preparing 2025 returns. Dollar figures on this page are the ones printed in that edition; check the current publication and form instructions for your tax year. This page summarizes the publication and does not replace it.