Whether you have to file a state tax return comes down to three questions: which state you live in, how much you made, and whether any of that income came from somewhere else. Nine states don’t tax personal income at all, so residents there usually have nothing to file. Everyone else has to check their state’s filing threshold, which shifts with filing status, age, and sometimes the type of income. Move during the year, work remotely across a state line, or pick up money in a state you don’t live in, and the answer gets more complicated.
States Where You Likely Owe No Return
Eight states impose no individual income tax at all: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, and Wyoming. New Hampshire was the last holdout, repealing its tax on interest and dividends effective January 1, 2025. If you live in one of these states and had no income sourced to another state, there is no state income tax return to file.
Washington often gets lumped in but sits a little apart. Wages and salary aren’t taxed, but the state does tax capital gains on the sale of stocks, bonds, and other long-term assets above a standard deduction of $278,000 (the 2025 figure, adjusted annually).1Washington Department of Revenue. Capital Gains Tax The threshold keeps most people out of it, but if you sold investments and cleared it, Washington expects a return even though your paycheck isn’t taxed.
None of this eliminates other state or local obligations. Property taxes, sales taxes, and various excise taxes still apply. The point is narrower: no income tax return.
Income Thresholds for Residents
The other 41 states and the District of Columbia each set their own minimum income for mandatory filing. Thresholds vary by filing status, age, and sometimes by whether someone else can claim you as a dependent. Some states peg the number to their standard deduction; others use a figure of their own. A single filer might have to file with only a few thousand dollars of gross income, while married couples filing jointly usually get a higher floor.
Filing status matters more than people expect. Most states use the same categories as your federal return: single, married filing jointly, married filing separately, head of household, and qualifying surviving spouse. Each carries its own threshold. If you are 65 or older or blind, many states raise the threshold further, mirroring the extra standard deduction on the federal side. The exact numbers change periodically, so confirm your state’s current figures on the tax agency’s site before deciding you don’t have to file.
Residency itself hinges mostly on domicile, meaning the place you treat as your permanent home. Most states also apply a statutory residency test: keep a permanent place to live in the state and spend more than 183 days there during the year, and the state treats you as a resident no matter where you say your domicile is. Residents owe tax on all income from all sources, not just what was earned inside the state. Wages, investment income, rental income, retirement distributions, business income: all of it counts.
If You Moved During the Year
Move into or out of a state mid-year and you become a part-year resident of both. Most states require part-year residents to file if they had any income during the months they lived there, and the filing threshold is often lower than for full-year residents. In some states it drops to the first dollar of income.
A part-year return splits your income two ways: everything you earned while you lived in the state, and any income sourced to that state during the part of the year you didn’t live there. Deductions and credits are usually prorated for the portion of the year you were a resident. That often means filing returns in two states for the same year, each covering a different slice.
Records are the practical problem. You need to know the exact date you established residency in the new state, and you want documentation to back it up: a new lease, an updated driver’s license, voter registration. States sometimes dispute the move date, especially if you kept a home in the old state after relocating. Get the date wrong and both states may try to tax the same income.
If You Earned Money in a State Where You Don’t Live
You don’t have to live in a state to owe it tax. Income sourced to a state you’re not a resident of can trigger a non-resident return there. Source income includes wages for work physically performed in the state, rent from property located there, business income from operations in the state, and gains from selling real estate inside its borders.
Non-resident thresholds tend to be much lower than resident thresholds. Some states expect a return from any non-resident with even one dollar of source income. Others set a small floor of a few hundred dollars. Short work trips, rent from a single out-of-state property, or business income routed through another state’s economy can all pull you into a filing obligation.
This reaches more people than it sounds like. Consultants traveling to client sites, salespeople covering multi-state territories, and athletes or entertainers performing in different states all face potential filings in every state where they worked. If an employer withheld tax for a state you passed through, you almost certainly need to file there anyway, even if only to get the over-withheld amount back.
Remote Work and the Convenience-of-the-Employer Rule
The general rule for remote work is simple: you owe income tax to the state where you physically do the work. Live in one state and work from home for an employer based in another, and you usually owe only your home state. A handful of states apply an aggressive exception.
About seven states enforce a convenience-of-the-employer rule. If you’re working remotely from another state for your own convenience rather than because your employer requires it, the employer’s state can still tax those wages as if you’d been at the office. New York is the best-known example. Connecticut, Delaware, Nebraska, Oregon, and Pennsylvania apply versions of it, with Connecticut and New Jersey mainly using theirs as a countermeasure against other convenience-rule states.
In practice, a remote worker living in New Jersey who works for a New York employer can owe New York income tax on all their wages without ever setting foot in New York during the year. That worker files a New York non-resident return, pays New York, and then claims a credit on the New Jersey resident return for the taxes paid across the line. Before you assume you owe only your home state, check whether your employer’s state applies this rule.
Reciprocal Agreements Between Neighboring States
Some pairs of neighboring states have reciprocal agreements that simplify things for commuters. Under one of these, if you live in one state and commute to a job in the partner state, you owe income tax only to your home state. The work state agrees not to tax your wages, and your employer withholds for your state of residence instead.
These agreements cluster in the Midwest and Mid-Atlantic, where cross-border commuting is common. Reciprocity exists only between specific partner pairs, though, not across the board, so confirm your particular home-and-work pair before relying on it.
To use reciprocity, you generally have to file an exemption certificate with your employer certifying that you live in the partner state, so they stop withholding for the work state. Miss the form and your employer withholds for the wrong state, and you can still fix it at tax time by filing a non-resident return in the work state to claim the refund while paying your home state what it’s owed. Filing the exemption up front avoids the extra return.
Avoiding Double Taxation
When two states tax the same income, the credit for taxes paid to another state is what keeps you from paying twice. Almost every state with an income tax offers one, and the mechanics are consistent. File a non-resident return in the state where the income was earned and pay their tax. Then, on your resident state return, claim a credit for the amount you paid to the other state.
The credit is capped at the lesser of what you actually paid or what your home state would have charged on the same income. Live in a high-tax state and earn income in a low-tax state, and the credit covers everything you paid to the work state while you still owe the difference at home. Reverse it, and the credit wipes out your home-state liability on that income, but the extra you paid to the work state isn’t refunded to you.
A common and costly mistake: assuming that because a state already taxed the income, you don’t have to report it to your home state. Residents owe tax on all income, wherever earned. The credit resolves the double-taxation problem, but only if you file both returns and claim it. Leaving your home state return off because the income “was already taxed” is one of the fastest ways to get a notice and end up owing back taxes with interest.
When Filing Anyway Is Worth It
Coming in under your state’s threshold doesn’t always mean skipping the return makes sense. If your employer withheld state income tax from your paychecks, filing is the only way to get that money back. Withholding runs off your W-4 and the state’s withholding tables; it doesn’t know whether your annual income will end up below the filing floor. Earn $8,000 in a state with a $12,000 threshold and you owe no tax, but the couple hundred dollars withheld sits with the state treasury until you file and claim it.
Some states also run their own earned income tax credit or other refundable credits for lower-income filers. These can produce a refund even when you owe no tax. Don’t file and you forfeit the money. Part-time workers, students, and anyone whose income fluctuated during the year are the people most often affected.
What Happens if You Skip a Required Return
If you were supposed to file and didn’t, the consequences follow a familiar shape. Most states charge a failure-to-file penalty calculated as a percentage of the unpaid tax for each month the return is late. The federal version is 5% per month, capped at 25%.2Internal Revenue Service. Failure to File Penalty Many states use a similar structure with their own percentages and caps. Some tack on a flat minimum penalty regardless of the tax owed.
Interest accrues on top, usually running from the original due date. Penalties and interest compound quickly if the problem sits for years. States exchange information with each other and with the IRS, so unfiled returns don’t stay invisible indefinitely. If the state finds the gap through data matching, it may assess tax based on its own estimate of what you owed, which is almost always higher than what you would have calculated yourself.
Deliberate evasion is a different category. Intentionally failing to file or filing a fraudulent return can be prosecuted criminally in most states, with potential fines and jail time. Prosecutions of ordinary taxpayers are rare, but they happen when the amounts are large or the conduct is egregious.
Deadlines and Extensions
Most states set their filing deadline to match the federal date of April 15. A few use different dates, so confirm with your state agency if you’re not sure. Most states also grant an automatic extension to October 15, mirroring the federal one. An extension only moves the filing date. It does not extend the deadline to pay. If you owe, you’re expected to estimate the amount and pay it by the original April deadline to avoid interest and penalties on the balance.