Key Takeaways
- Nine states charge no wage income tax in 2026 — AK, FL, NV, NH, SD, TN, TX, WA, WY.
- About thirteen states use a flat rate; the remaining 28 plus DC run progressive brackets.
- Top marginal rate is a cocktail-party number. Effective rate is what comes out of your paycheck.
- Residency is decided by two tests in parallel: domicile (intent) and statutory presence (typically 183 days plus a place of abode).
- Reciprocity agreements help cross-border commuters in the Midwest and Mid-Atlantic. New York refuses to sign one with anybody.
- Roughly 5,000 US cities and counties levy a local income tax. NYC, Philly, and Yonkers top the list.
Three Systems, 51 Versions
State income tax in 2026 splits cleanly into three buckets — no income tax at all, a single flat rate, or progressive brackets like the federal system. The split sounds tidy and isn't. Within each bucket, every state writes its own rules: different standard deductions, different exemptions, different rules for retirement income, different surtax cliffs, different cities layering local tax on top. The federal code is one rulebook. State code is fifty-one.
The political direction since 2021 has been toward flatter systems. Iowa collapsed nine brackets to one. Georgia, Mississippi, North Carolina, Idaho, Kentucky, and Louisiana all moved progressive systems toward flat or are phasing toward it. Whether that's good policy is a different essay; the practical effect is that the flat-rate column gets longer most years, and any guide more than two years old has stale rates somewhere.
The 9 No-Income-Tax States
Nine states charge no tax on wage income in 2026: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. New Hampshire was technically the holdout — it kept a 5% tax on interest and dividends through 2024 — but the I&D tax phased out fully effective tax year 2025. That moved NH from the asterisk column to the clean-zero column.
Two caveats people forget. Washington passed a 7% tax on long-term capital gains above $270,000 in 2022 — survived a constitutional challenge in 2023, applies in 2026. Tennessee's old Hall income tax (interest and dividends) was repealed in 2021 but still shows up in old guides. The other seven are clean zeros: no wage tax, no investment-income tax, no surprises.
No-income-tax doesn't mean low-tax. Texas leans hard on property tax — effective rates over 1.7% in many counties, among the highest in the country. Tennessee runs a 7% sales tax plus local add-ons that push effective rates near 10%. Florida's homeowners-insurance crisis post-Ian has functionally re-introduced an income-tax-equivalent for coastal residents — premiums above $8K/year aren't unusual in Miami-Dade. The states didn't waive revenue. They shifted the collection point.
Flat-Rate States
Thirteen states ran a flat income tax rate in 2026: Arizona at 2.5%, Colorado 4.4%, Georgia 5.39% (still phasing toward 4.99%), Idaho 5.695%, Illinois 4.95%, Indiana 3.0%, Kentucky 3.5%, Louisiana 3.0% (post-Landry HB1), Michigan 4.25%, Mississippi 4.4%, North Carolina 4.25%, Pennsylvania 3.07%, and Utah 4.55%. Arizona's 2.5% is the lowest in the country among states that tax income; Idaho's 5.695% is functionally the highest in the bucket.
Flat doesn't mean simple. Pennsylvania's 3.07% looks easy until you realize over 2,500 PA municipalities also levy a local Earned Income Tax (EIT) ranging 0.5-3.9% — Philadelphia at 3.75% is the headline, but Pittsburgh, Reading, and most townships add their own. Indiana's 3.0% state rate sits on top of a county tax in all 92 counties (0.5-3.38%, withheld from ). Maryland's 5.75% top rate sits under a county piggyback of 2.25-3.20% — a Howard County resident at the top bracket pays 8.95% before federal. The advertised flat rate is a starting line, not a finishing line.
Progressive Brackets
The remaining 28 states plus DC use progressive brackets. The top marginal rates that get the headlines: California 13.3% over $1M (with the new 1.1% Mental Health Services Tax above $1M, and AB 5 uncapping pushes some six-figure earners into a combined 14%+ marginal effective rate). Hawaii 11% post-Act 46 phase-in. New York 10.9% over $25M. New Jersey 10.75% over $1M. Oregon 9.9% over $125K (single). Minnesota 9.85% over $193K. Massachusetts 9% (5% flat plus 4% Fair Share over $1M).
Top marginal rate is a cocktail-party number. Effective rate is what comes out of your paycheck. A California single filer at $120K pays an effective state rate around 7.2% on California-source wages — not 13.3%. The headline rates only matter if your lands in the top tier, and the top tier in most states starts well above $200K. Pull the calculator if you want your actual number.
A few progressive states tax the first dollar earned. Maine taxes 5.8% on income from $0 to about $25K — there's no zero bracket. Hawaii's 12 brackets — the most of any US state — start at 1.4% from dollar one. Bracket sprawl makes Hawaii's tax look gentler than it is for low earners; the bottom four brackets cover only $9,600 of income for a single filer, so most full-time workers clear them by mid-March.
Withholding and State W-4s
Most states with an income tax run a state-level equivalent of the federal W-4. The form name varies — California's is the DE 4, New York's the IT-2104, Wisconsin's the WT-4, Ohio's the IT-4, Missouri's the MO W-4, Maryland's the MW507. They mostly piggyback on your federal W-4 selections (filing status, dependents, additional withholding) but a few states diverge enough to require a separate form. If you don't fill it out, your employer defaults to single with zero allowances — the highest withholding posture, which is conservative but means a fat refund next April rather than money in your paycheck now.
Two state-specific withholding traps worth knowing. New Jersey withholds based on a different table than NJ taxable income suggests — the disposable-income default tends to over-withhold for high-earner single filers (good for refund, bad for cash flow). California withholds extra for (1.1% in 2026, no wage cap after AB 5) on top of state income tax — a separate paystub line, not bundled. Pennsylvania has 3.07% state plus the local EIT, which your employer also withholds — your paystub will show three separate lines: federal, PA state, and PA local.
Residency: Domicile vs the 183-Day Test
State tax residency is decided by two tests that run in parallel — fail either and you're a resident. Domicile is the intent-based test: where is your true permanent home, the place you intend to return to. Statutory residency is the mechanical test: most states say 183+ days physically present plus a permanent place of abode (a place you keep year-round, not just rent for a week). New York and California are the most aggressive at auditing both.
Domicile is decided on the boring details. Where you vote. Where your driver's license and car are registered. Where your doctor and dentist are. Where your kids go to school. Where your safe-deposit box is. Where you keep your dog's vet records — yes, really, the New York audit checklist names it. Snowbird audits aren't TV myth; they keep accountants in Florida and Texas full-time-employed catching New Yorkers who claimed Florida residency but kept a Westchester address, a Westchester pediatrician, and a Met Gala invite list.
The 183-day count is audited via credit-card statements, EZ-Pass logs, cell-phone tower pings, and airline records. A day-in-state means any part of a calendar day — a 30-minute layover counts. Track days in a calendar app from January 1 if you're trying to break residency. New York's auditors are professional and patient. They can subpoena five years of cell-tower data. Build the paper trail before the audit, not after.
Reciprocity Agreements
A reciprocity agreement lets you pay income tax only to your state of residence, not to the state where your employer is based. About a dozen states participate, almost entirely the Midwest and Mid-Atlantic — Illinois, Indiana, Kentucky, Maryland, Michigan, Minnesota, New Jersey, Ohio, Pennsylvania, Virginia, West Virginia, Wisconsin, plus DC. If you live in NJ and work in PA, you file a single NJ return. Your employer withholds NJ tax for you. No reciprocity = file two returns and credit one against the other.
The famous gap: New York refuses to sign reciprocity with anyone. NY-NJ commuters and NY-CT commuters file two state returns every April, claim a credit on their resident-state return for tax paid to NY, and live with the cash-flow hit through the year. The credit usually zeroes out at the end, but withholding-side it means your paycheck looks lighter than it should. New York gets to keep employer-side withholding all year. Politicians have negotiated and renegotiated the issue for decades and gotten nowhere.
City and Local Taxes
Roughly 5,000 US cities and counties levy a local income tax — almost always layered on top of state tax, withheld separately from your paycheck. Most are tiny (0.5-1% in mid-sized Ohio and Pennsylvania municipalities). A few are large enough to redraw the map of where it makes sense to live.
New York City: 3.078% to 3.876% resident income tax on top of NY state — a Manhattan single filer at $250K runs an effective combined NY-state-plus-NYC rate near 10.5%. Yonkers tacks on a surcharge equal to about 16.75% of your NY state liability. Philadelphia: 3.75% resident wage tax (3.44% non-resident), flat, no exemption, taxes from dollar one. Detroit: 2.4% resident, 1.2% non-resident. Pittsburgh: 3% resident. Cleveland, Columbus, Cincinnati: ~2.5% each. Wilmington, Delaware: 1.25%.
Two state-systems where local tax is universal: Indiana (county tax in all 92 counties, 0.5-3.38%, withheld from alongside state) and Maryland (counties piggyback 2.25-3.20% on top of the 5.75% state rate, withheld together as one line). Ohio runs roughly 600 RITA and CCA municipalities with separate filings — moving from one Cleveland suburb to another can change your local tax rate. Kentucky has occupational license fees by county that function similarly. If you're moving for a job, the local tax should be on your spreadsheet alongside rent and commute.
How State Tax Meets Federal
Two interactions matter. First, the cap: the Tax Cuts and Jobs Act of 2017 capped state-and-local-tax deductions at $10,000 on your federal return. The cap survives in 2026 (Congress has discussed raising or removing it; as of writing it's still $10K). For a high-tax-state professional, federal taxable income gets calculated as if you only paid $10K of state tax — even if you actually paid $40K. The cap is the single biggest reason high earners moved Florida-direction post-2018.
Second, a few states let you deduct federal tax paid on your state return — a reverse interaction. Alabama, Iowa (capped), Louisiana (limited and phasing out post-HB1), Missouri (capped at $5K single / $10K ), Montana, and Oregon (capped at $7,800) let some or all federal-tax-paid through as a state deduction. The effect is that your state effective rate drops as your federal rate rises — a kind of state-level cushion against federal bracket creep. A few of those states are phasing the deduction down or out, so check current-year rules before banking on it.
Pass-through-entity tax (PTET) elections — available in over thirty states by 2026 — let owners of S-corps and partnerships pay state tax at the entity level, where it's deductible on the federal return as a business expense rather than a state-tax deduction subject to the cap. For a physician partner or a Big-4 senior in a partnership-structured firm, PTET can save 2-3 points of effective federal tax. Worth asking your accountant about if you have ownership income.