You can file a state income tax return without filing a federal return, and it’s a legitimate move when your income sits above your state’s filing threshold but below the IRS’s. The catch is that almost every state return begins with your federal adjusted gross income, so you’ll still have to run the federal numbers even if you never send them to the IRS. Expect to paper-file, and expect the process to take a bit longer than a normal state filing.
When This Situation Comes Up
The gap between federal and state filing thresholds is what puts people here. For the 2025 tax year, the IRS doesn’t require a return from a single filer under 65 unless gross income reaches $15,750. Head of household filers hit the threshold at $23,625, and married couples filing jointly (both under 65) at $31,500.1Internal Revenue Service. Check if You Need to File a Tax Return State thresholds can sit far lower. Some states require a nonresident return from anyone who earned as little as $1,000 of in-state income, and a handful require one from any nonresident who earned any income at all inside their borders.2Tax Foundation. Nonresident Income Tax Filing and Withholding Laws by State, 2026
Before you go any further, confirm that your state actually taxes income. Eight states don’t: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, and Wyoming. Washington doesn’t tax wages or salary but does impose a separate tax on capital gains above a certain threshold. If you live and worked exclusively in a no-tax state, you have nothing to file.
If your state does tax income, the question is whether what you earned exceeds its filing threshold for your residency category. Residents, part-year residents, and nonresidents face different rules, and some states vary the thresholds by filing status and age just like the federal system.
How Residency Shapes What You Owe
Your residency classification decides how much of your income a state can reach. There are three categories, and knowing which one you fall into matters more than any other single decision on the return.
A resident is taxed on all income from every source, no matter where it was earned. This mirrors the federal approach. A part-year resident is taxed on all income earned while living in the state, plus any income sourced to the state after leaving. This is the category for people who moved in or out mid-year. A nonresident is taxed only on income sourced to that state, which usually means wages for work physically performed there, rental income from property located there, or business profits from operations inside its borders.
Residency itself hinges on domicile: your permanent home, the place you intend to return to when you’re away. You can have only one domicile at a time, and changing it requires both physically moving and genuinely intending to stay. Renting an apartment in a new state while keeping the old home doesn’t shift it.
Some states also use “statutory residency” rules that look at time spent in the state. New York treats you as a resident if you maintain a permanent place to live in the state and spend 184 or more days there during the year, even if your domicile is elsewhere.3New York State Department of Taxation and Finance. Frequently Asked Questions about Filing Requirements, Residency, and Telecommuting for New York State Personal Income Tax California presumes residency when you spend more than nine months in the state. Check the specific rules of any state claiming a piece of your income.
Reciprocal Agreements That May Eliminate the Filing
If you live in one state and work in another, check whether the two have a reciprocal tax agreement before filling out anything. About 16 states and the District of Columbia participate in roughly 30 reciprocal arrangements that let cross-border commuters pay income tax only to their state of residence. Under these agreements, your employer withholds tax for your home state, and you don’t file in the work state at all.
These agreements cluster in the Mid-Atlantic and Midwest. Someone who lives in Pennsylvania and works in New Jersey, for instance, pays Pennsylvania tax on those wages and files an exemption form with the employer so New Jersey doesn’t withhold. Reciprocity covers only wage and salary income from employment. Rental income, business profits, and investment gains sourced to the other state still get taxed there.
If no reciprocal agreement applies, you’ll typically file in the work state and then claim a credit on your home state return for taxes paid to the other state.
Handling the Federal AGI Line Without a Federal Return
Nearly every state return starts by asking for federal adjusted gross income, the figure that appears on line 11 of Form 1040.4Internal Revenue Service. Adjusted Gross Income Without a completed Form 1040, that number doesn’t exist yet.
The fix is to calculate it anyway. Gather every income document (W-2s, 1099-NEC, 1099-INT, 1099-DIV, 1099-R, and anything else that would land on a 1040), add up gross income, then subtract the adjustments that would go on Schedule 1, such as student loan interest, educator expenses, or the deductible portion of self-employment tax. The result is your federal AGI. Enter it on the state return. Don’t mail the federal form.
Keep every worksheet you used. If the state audits the return, they’ll want to see how the AGI figure was built. Some states explicitly tell filers to complete a “dummy” federal return for this purpose and note on the state form that no federal return was filed.
Building the State Return
Once you have federal AGI, the rest of the return is state-specific. Gather your income documents along with anything supporting state credits or deductions you plan to claim: property tax statements, receipts for contributions to a state college savings plan, and similar records.
Download the correct form from your state’s department of revenue. The form you need depends on your filing category, and the names vary widely. Georgia uses Form 500 for residents. Indiana uses IT-40 for full-year residents and IT-40PNR for part-year and nonresidents. California nonresidents use Schedule CA (540NR) to allocate income. Search your state’s tax agency site directly rather than guessing.
Adjustments to Federal AGI
State taxable income starts with federal AGI and then gets pushed up or down by state-specific additions and subtractions. A common addition is interest from municipal bonds issued by other states, which is federally tax-free but usually taxed by your state because states typically exempt only their own municipalities’ bonds. Common subtractions include certain retirement income exclusions, military pay exemptions, and portions of Social Security benefits that were taxed federally but are exempt at the state level. Read your state’s line-by-line instructions rather than relying on general rules.
Standard or Itemized Deduction
Apply either the state’s standard deduction or itemized deductions after those adjustments. State standard deduction amounts are set independently from the federal figure. The 2026 federal standard deduction for a single filer is $16,100, but North Carolina’s is $12,750 for the same filer.5North Carolina Department of Revenue. North Carolina Standard Deduction or North Carolina Itemized Deductions Massachusetts offers no standard deduction at all and uses a personal exemption system instead.6Massachusetts Department of Revenue. Differences Between MA and Federal Tax Law for Personal Income State itemized deduction rules also often diverge from federal ones, so compare before automatically matching your federal choice.
Tax Rates
Run the final taxable income through your state’s rate schedule. Most states with an income tax use a progressive structure with marginal rates. Fifteen states use a flat rate instead, applying a single percentage to all taxable income.7Tax Foundation. State Individual Income Tax Rates and Brackets, 2026 The current schedule appears in the return instructions.
Credits
Credits come off the gross tax dollar for dollar. The most important one for anyone earning income in multiple states is the credit for taxes paid to another state, which prevents the same income from being taxed twice. It’s capped at the lesser of what you actually paid to the other state or what your home state would have charged on that same income. If the other state’s rate is higher, you won’t get a full offset, but you also won’t be taxed twice on the full amount.
Other common state credits include earned income credits (often set as a percentage of the federal Earned Income Tax Credit), property tax credits on a primary residence, and child care credits. Each has its own eligibility rules and usually a separate schedule.
Why You’ll Probably Have to Paper-File
Most state e-filing systems are built to receive the state return only after the IRS accepts a corresponding federal return. New Jersey’s system, for example, routes the state return through IRS acceptance before making it available to the state.8New Jersey Division of Revenue and Enterprise Services. Division of Revenue E-File Individual Income Tax Returns With no federal return in the pipeline, the state return has nowhere to go electronically.
Commercial tax software enforces the same restriction. If you prepare a state return without also transmitting a federal return, most programs block electronic submission and require you to paper-file. California is a notable exception, and some software platforms allow California returns to be e-filed independently.
If paper filing is your only option, use the correct mailing address from the current year’s form instructions. Many states use different addresses for returns with a payment versus returns expecting a refund. Don’t reuse last year’s envelope.
If you owe, include a check or money order payable to the state’s treasury or revenue department, with your Social Security number and the tax year written on the payment. Some states provide a separate payment voucher that goes in the envelope with the check.
Send the return by certified mail with return receipt requested. The receipt is your proof of the date the state received the return, which matters if any deadline dispute comes up later. Keep a full copy of the return and every attachment. Refunds from paper returns generally take four to eight weeks, compared with two to three weeks for e-filed returns.
Deadlines, Extensions, and What Happens If You Skip It
Most states set their individual income tax deadline on April 15, matching the federal date. A few give you more time. Delaware, Iowa, and New Mexico typically use April 30. Virginia and South Carolina extend to May 1. Louisiana runs to May 15. These later deadlines apply whether or not you file federally.
Many states automatically honor a federal extension. File IRS Form 4868, and the state treats your state return as extended too, often to October 15. The catch is that if you aren’t filing a federal extension because you don’t owe federal tax, you may need a separate state extension form. Check your state’s rule specifically, because some states require their own extension request regardless of what you did federally. An extension gives more time to file, not more time to pay. If you owe state tax and don’t pay by the original deadline, interest and penalties start accruing even if the filing extension is approved.
Skipping a required state return carries real risk. States exchange data with the IRS and receive copies of your W-2s and 1099s, so income sourced to a state where no return was filed tends to surface eventually. Late filing penalties commonly run around 5% of the unpaid tax per month up to a 25% maximum, with late payment penalties adding roughly another 0.5% per month and interest on top of both. The bigger issue is the statute of limitations. When you file a return, most states have a three-year window to audit and assess. When you never file, that window never opens, and the state can pursue unfiled returns with no time limit on assessment. Filing, even late, starts the clock.