If you earned money in a U.S. state as a nonresident alien, filing your federal Form 1040-NR almost never finishes the job. A nonresident alien state tax return is a separate filing you owe to each state where you had U.S.-source income, prepared under that state’s own residency rules, on that state’s own form, and submitted by that state’s own deadline. Nine states skip the issue entirely by not taxing personal income; the other 41 and the District of Columbia each run an independent system you have to deal with on its own terms.
First, Check Whether the State Taxes Income at All
As of 2026, nine states charge no broad-based personal income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. If every dollar of your U.S.-source income came from one of these, you generally have no state income tax return to file. New Hampshire phased out its tax on investment income at the end of 2025, so wage earners there were already unaffected.
Washington is the one to watch. It charges no tax on wages but does impose a capital gains tax on high earners. A nonresident alien with large investment gains sourced to Washington should check whether that tax reaches them before concluding there is nothing to file.
How the State Decides If You’re a Resident
States do not use the federal Substantial Presence Test. The IRS applies a rolling three-year day-count to decide whether someone is a U.S. resident for federal purposes, and states ignore that formula. They look instead at two things: domicile, meaning the place you consider your permanent home and intend to return to, and statutory residence, which typically applies when you keep a permanent place to live in the state and spend more than 183 days there in the calendar year.
The evidence states weigh is concrete: where you hold a driver’s license, where you registered to vote, where your bank accounts are, where your family lives. Those facts can override your federal classification, so you can be a nonresident alien to the IRS and a full-year resident to a state at the same time.
Most states sort filers into three categories: full-year resident, part-year resident, and nonresident. Nonresidents live outside the state but earned income from sources inside it. Part-year residents moved in or out during the year. Each category uses a different form and a different rule for how much of your income gets taxed, and picking the wrong one leads to back-tax assessments later.
A Trap for F, J, M, and Q Visa Holders
International students and scholars on F, J, M, or Q visas get “exempt individual” treatment under the federal Substantial Presence Test, so their days in the U.S. don’t count toward the 183-day federal threshold for a set number of years. States are not required to follow that exemption. Some will treat you as a resident for state tax purposes based on physical presence alone, even while the IRS still considers you a nonresident alien. Check the rule in the specific state where you live or study rather than assuming your federal status carries over.
What Income the State Can Actually Tax
States tax nonresident aliens only on income sourced within their borders. Wages earned while you were physically working in the state are the main category, even if your employer is based elsewhere. Rental income from property in the state, profits from a business operating there, and gains from selling real estate in the state all count as state-source income.
Passive income like bank interest and stock dividends works differently. For nonresidents, these earnings are generally taxed by the state where you live, not where the money originated. Since nonresident aliens typically don’t live in any U.S. state, this income often falls outside state taxing authority. Bank interest from a U.S. account not connected to a U.S. business is frequently exempt at the federal level as well, provided you’ve filed Form W-8BEN with the bank.
On a nonresident return you report your total income and then calculate the share sourced to that state. The state applies its rate to that ratio. Getting the allocation wrong means either overpaying or drawing an audit when the figures don’t match what your employer reported.
Your Federal Tax Treaty May Not Apply
This is where people get blindsided. A federal tax treaty can exempt certain income from U.S. federal tax, but not every state honors treaties. The IRS states directly: “Some states honor the provisions of U.S. tax treaties and some states do not.”1Internal Revenue Service. Tax Treaties
According to IRS guidance, states that do not allow treaty benefits include Alabama, Arkansas, California, Connecticut, Hawaii, Kansas, Kentucky, Maryland, Mississippi, Montana, New Jersey, North Dakota, and Pennsylvania.2Internal Revenue Service. State Income Taxes If you’re a teacher or researcher whose salary is treaty-exempt federally, or a student whose scholarship is exempt under a treaty, the full amount can still be taxable in any of those states. Your federal return will show zero tax on that income while your state return shows a balance due. The federal filing lulls people into thinking the income is tax-free everywhere, and it isn’t.
If You Worked in More Than One State
Earned income in two states during the year? You file a separate nonresident return in each. A researcher who spent the spring semester at a university in one state and the fall at an institution in another files two state returns on top of the federal 1040-NR, each covering only the income sourced to that state.
When two states claim the same income, you can usually avoid double taxation through a credit for taxes paid to the other state. The credit only works if you actually file in both states and attach documentation of what you paid elsewhere. Skipping a return doesn’t just leave a filing gap; it also costs you the credit on the return you did file.
Documents and Forms
Every state return starts with a taxpayer identification number. You need either a Social Security Number or an Individual Taxpayer Identification Number (ITIN).3Internal Revenue Service. Taxpayer Identification Numbers (TIN) If you aren’t eligible for an SSN, apply for an ITIN using IRS Form W-7, which you can submit with your federal return. Without one of these numbers, no state tax department will process your filing.
Most states require a complete copy of your federal Form 1040-NR attached to the state return.4Internal Revenue Service. About Form 1040-NR, U.S. Nonresident Alien Income Tax Return States use your federal figures as the starting point and then adjust for the share earned within their borders. You will also need all wage statements: Form W-2 from employers and Form 1042-S for income subject to withholding under a treaty or other provisions.5Internal Revenue Service. About Form 1042-S, Foreign Person’s U.S. Source Income Subject to Withholding
Each state has its own nonresident form. California uses Form 540NR; New York uses Form IT-203. Download the current year’s version from the state revenue department’s website. Prior-year forms will be rejected.
Deadlines, Extensions, and Submission
Most states follow the federal April 15 deadline, shifting to the next business day when April 15 falls on a weekend or holiday. A few states set slightly different due dates, so confirm it on the state revenue department’s site.
If you can’t file in time, most states grant an automatic extension when you file a federal extension on Form 4868. Some states still require a separate state extension form, and a few only grant the extension if you don’t owe any tax. The extension gives you more time to file, not more time to pay. Interest and penalties keep accruing on any unpaid balance from the original due date.
You can submit most nonresident state returns on paper or electronically. State e-filing portals accept nonresident returns and send immediate confirmation, and they process faster than mailed paper. If you mail a paper return, check the address carefully: most states use different addresses for returns with payment and returns claiming a refund. Send a complete copy of your federal 1040-NR and all supporting wage statements with the state forms.
If you owe, state portals typically accept direct debit from a U.S. bank account or credit card payments. For refunds, most states require a U.S.-based bank account for direct deposit; without one, the state mails a paper check to the address on your return, which takes much longer to reach an address outside the country.
What Happens If You Don’t File
States impose penalties for both failing to file and failing to pay, and they stack. The structure usually mirrors the federal approach: a monthly percentage penalty on unpaid tax plus daily interest on the outstanding balance. Beyond the money, states can place liens on property, garnish wages earned within their borders, and refer debts to collection agencies.
Unresolved state tax debt causes problems that outlast the tax year. For a nonresident alien who may return to the U.S. for future work or study, those problems are far easier to prevent than to clean up.
Passport Consequences for Large Federal Debts
When federal tax debt exceeds $66,000, the IRS is required to certify that debt to the State Department under 26 U.S.C. ยง 7345.6Office of the Law Revision Counsel. 26 USC 7345 – Revocation or Denial of Passport in Case of Certain Tax Delinquencies The State Department can then deny a new passport application, revoke an existing passport, or issue a limited-validity passport good only for travel back to the United States.7Internal Revenue Service. Revocation or Denial of Passport in Cases of Certain Unpaid Taxes The provision targets federal debt, but unfiled state returns can feed into federal problems when audit adjustments raise your overall liability.
Immigration Applications
For nonresident aliens on the path to a green card or citizenship, tax compliance has weight beyond the dollars. USCIS evaluates “good moral character” during naturalization, and compliance with tax obligations is an explicit factor. Full payment of overdue taxes supports a positive finding. Unfiled state returns leave a gap in your tax history that an immigration officer may flag, and fixing it later requires amended returns, penalty payments, and extra documentation that slows the case.
Mistakes That Cause Most of the Trouble
The single most frequent error is assuming the federal 1040-NR takes care of everything. It doesn’t. The IRS and state tax departments are separate systems with separate filings. The second most common error is relying on a federal tax treaty to exempt income from state tax without checking whether the state honors that treaty. These two account for the bulk of surprise state tax bills nonresident aliens receive.
Other recurring mistakes: filing as a nonresident in a state that treats you as a resident because you kept an apartment there more than 183 days, forgetting to file in the second state when you worked in two, and missing a deadline because you assumed a federal extension automatically covered every state. Each is straightforward to prevent with a short visit to the relevant state revenue department’s website before you start the return.