In most states, yes, you have to file state taxes even if you don’t owe anything. The filing requirement is driven by how much income you earned, where you lived, and where you worked—not by your final tax balance. Nine states don’t tax wage income at all, so residents there generally have nothing to file. Everywhere else, you need to check the specific rules, because a zero balance is not a defense against a missed return.
States Where the Question Doesn’t Apply
Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming do not levy a traditional individual income tax on wages and salaries.1Tax Foundation. Nonresident Income Tax Filing and Withholding Laws by State If you live and earn in one of them, there’s no state income tax return to worry about. Two footnotes: New Hampshire historically taxed interest and dividends, though that tax has been phased out, and Washington imposes a capital gains tax on certain high-value asset sales that can create a separate filing obligation. For the other 41 states and the District of Columbia, the rest of this applies.
Crossing the Income Threshold Triggers a Return
Every state with an income tax sets a minimum income level. Land above it and you must file, whether or not your withholding already covered what you owe. Thresholds vary widely and depend on filing status, age, and dependents. Many states peg the number to some combination of the state’s own standard deduction and personal exemption, and those figures don’t line up with the federal ones.
The federal standard deduction for a single filer in 2026 is $16,100, and $32,200 for married couples filing jointly.2Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Some state thresholds sit well below those numbers, so a taxpayer who doesn’t need to file federally may still owe a state return.
Consider a common example: you earned $15,000 in wages as a single filer. Your employer withheld state tax from every paycheck, and your final state liability works out to zero. You still have to file if your state’s threshold is below $15,000, and many are. “I don’t owe anything” is not a legal defense. The obligation to file is separate from the obligation to pay.
Dependents With Their Own Income
If someone else can claim you as a dependent, your state filing threshold is usually lower than the standard amount, sometimes much lower. States often set separate thresholds by income type. A teenager with a summer job and a small brokerage account might have an unearned-income threshold of just a few hundred dollars, even when the earned-income threshold is higher. Parents miss this a lot, assuming small amounts don’t count. Look for the dependent filing threshold specifically; it’s usually in its own table in the state’s instructions.
Retirees
Retirees deal with a patchwork. Several states exclude Social Security benefits entirely; a few tax them above certain AGI thresholds. If Social Security is your only income and your state fully exempts it, you may fall below the filing line. Add a pension, an IRA withdrawal, or investment income and those amounts count toward your gross income, which can push you over. Some states also grant a higher filing threshold based on age, so check whether that applies.
Where You Lived and Worked Also Triggers Filing
Residency creates its own filing trigger, separate from the income threshold question. States sort taxpayers into full-year residents, part-year residents, and nonresidents, and each category has its own rules.
Full-Year Residents
If you lived in a state all year, that state generally wants to see all your income from every source—wages earned elsewhere, rent from out-of-state property, investment gains. To keep you from being taxed twice, your home state typically gives you a credit for tax paid to another state on the same income. But the obligation to report the income and file the return stands regardless of whether tax is ultimately owed.
Nonresidents
If you don’t live in a state but earned income there—traveled to a client site, did consulting work, collected rent on property you own—that state can require a nonresident return on the income sourced inside its borders. Nonresident thresholds vary sharply. As of 2026, 22 states have essentially no meaningful nonresident filing threshold, so even a single day of work in the state can trigger a return. Nineteen states set thresholds by days worked (roughly 20 to 30 days) or by dollar amount (from $100 to more than $15,000).1Tax Foundation. Nonresident Income Tax Filing and Withholding Laws by State
Part-Year Residents
If you moved states during the year, you’ll likely file in both. Each state expects a return covering the months you lived there, reporting all income earned during your residency plus any income sourced to that state during the nonresident portion. This is one of the most common ways people accidentally skip a required filing. They focus on the new state and forget the old one still expects a return for the months they were there.
Reasons to File Even When You’re Below the Threshold
Even when you’re clearly below the filing threshold and don’t owe a dime, skipping the return can cost you money. Two situations come up constantly: over-withholding and refundable credits.
Getting Back Over-Withheld Tax
If your employer withheld more state income tax than you actually owe—common when you start a new job mid-year, claim fewer allowances than you’re entitled to, or earn less than projected—the only way to get that money back is to file. The state isn’t going to send you a check unprompted. Your W-2 shows the state tax withheld in Box 17, and the return is the formal request to have the overpayment refunded.
Refundable Credits Pay You in Cash
Refundable credits can pay you beyond zeroing out your tax bill. The most common is the state-level Earned Income Tax Credit, offered by roughly 30 states and the District of Columbia. Most are calculated as a percentage of the federal EITC, ranging from around 3 percent to 100 percent of the federal credit. If your state has a refundable EITC and your income qualifies, the credit is paid to you in cash even when your tax liability is already zero, but only if you file. Some states also offer refundable credits for child care expenses, property taxes paid by renters, or low-income households. Every one requires a filed return.
The Refund Deadline You Can Miss
You don’t have forever to file for a refund. Most states follow a statute of limitations similar to the federal rule: generally three years from the date the return was due, or two years from the date the tax was paid, whichever is later. Miss the window and the state keeps your money. If you’ve been putting off filing because you figured there was no rush when you’re owed a refund, the clock is running. For a 2025 tax year return due in April 2026, the refund claim deadline in most states would expire around April 2029.
What Happens if You Skip a Required Return
The consequences of skipping a required return depend heavily on whether you owe tax. At the federal level, the failure-to-file penalty runs 5 percent of the unpaid tax per month, up to a maximum of 25 percent.3Internal Revenue Service. Failure to File Penalty Most states use a similar structure for their own penalties. When your actual liability is zero, 5 percent of zero is zero, so many states impose no dollar penalty for a late return with no balance owed.
Not all states are that forgiving. Some impose flat minimum penalties for significantly delinquent returns even when the balance is zero, typically in the range of $50 to a few hundred dollars. The risk grows when you’re wrong about owing nothing. If the state disagrees with your math—maybe you forgot to include freelance income reported on a 1099, or you miscounted your withholding—the penalty applies to the actual unpaid balance, not the zero you assumed.
When a taxpayer doesn’t file at all, the state revenue department can build a return for you using wage and income data reported by employers and financial institutions. This substitute return almost always produces a higher tax bill than you’d calculate yourself, because the state won’t give you deductions and credits you didn’t claim. Penalties and interest stack on top of that inflated figure. What might have been a zero balance or a small refund can snowball into a notice for hundreds or thousands of dollars. Filing your own return, even late, is always better than letting the state guess.
Extensions and Free Filing Options
If you need more time, most states offer a filing extension, typically six months, that pushes the deadline to October. Many states grant this automatically, so you don’t need to file a separate form when your balance due is zero. The extension form is primarily a vehicle for making estimated payments; when no payment is needed, the form serves no purpose. Remember that an extension gives you more time to file, not more time to pay. If you miscalculated and actually owe something, interest and penalties run from the original April deadline regardless.
Cost shouldn’t be the reason you skip a return you need to file. The IRS Free File program, available to taxpayers with adjusted gross income of $89,000 or less, partners with private tax software companies to offer free federal filing, and some partners include free state return preparation.4Internal Revenue Service. 2026 Tax Filing Season Opens With Several Free Filing Options Available Eligibility varies by partner and may depend on your age, income, state, or military status. Many state revenue departments also offer their own free e-filing portals, particularly for residents with straightforward returns. If you’re filing solely to collect a refund you’re already owed, there’s no reason to pay someone to help you get it.