Two people with identical $75,000 salaries can take home meaningfully different paychecks depending purely on which state they live in — nothing to do with federal tax, deductions, or benefits. State income tax is one of the most overlooked variables in take-home pay, and it's also one of the most misunderstood. Here's how it actually works, state by state.
Flat Tax vs. Progressive Tax
States generally use one of two systems. A flat tax applies the same percentage to all taxable income regardless of amount — Colorado's 4.4% flat rate, for example, applies whether you earn $30,000 or $300,000. A progressive tax splits income into brackets and applies increasing rates to each bracket, similar to the federal system. California's progressive system ranges from 1% on the lowest bracket up to 13.3% on income above roughly $1 million.
The Marginal Rate Myth
The single most common misunderstanding about progressive tax: people think if they're "in the 9% bracket," all their income is taxed at 9%. That's wrong. In a bracket system, each rate only applies to the income within that bracket. If a state's brackets are 2% up to $10,000, 4% from $10,000-$40,000, and 6% above $40,000, someone earning $50,000 pays 2% on the first $10,000, 4% on the next $30,000, and 6% only on the last $10,000 — an effective rate well below 6%, even though their "marginal" (top) rate is 6%.
How Take-Home Pay Compares by State
Using a $75,000 salary as an example, here's roughly how state income tax alone (ignoring federal tax, which is the same everywhere) changes what's left in your paycheck:
| State | Type | Approx. state tax owed |
|---|---|---|
| Texas | No income tax | $0 |
| Colorado | Flat 4.4% | ~$3,300 |
| Illinois | Flat 4.95% | ~$3,713 |
| New York | Progressive (up to 10.9%) | ~$3,800-$4,200 |
| California | Progressive (up to 13.3%) | ~$4,200-$4,600 |
That's a swing of roughly $4,000-$4,600 per year for the exact same salary, purely based on state of residence — before even factoring in cost of living, property tax, or sales tax differences.
Where Does the Money Actually Come From?
States with no income tax don't just forgo revenue — they raise it elsewhere. Texas has some of the highest property tax rates in the country (often 1.6-2%+ of home value annually). Washington and Tennessee lean more heavily on sales tax. Florida relies significantly on tourism-related revenue (hotel taxes, sales tax from visitors). The "no income tax" headline doesn't automatically mean "lowest total tax burden" — it depends heavily on your income level, whether you own a home, and your spending habits.
Local and City Taxes Stack On Top
Some cities layer an additional local income tax on top of state tax. New York City residents pay a city tax of up to 3.876% in addition to New York state tax. Philadelphia has a wage tax around 3.75% for residents. If you're comparing take-home pay between cities, always check for a local/municipal income tax — it's easy to miss and can add another percentage point or more.
What This Means for Your Paycheck
State income tax is calculated on top of federal tax and FICA (Social Security + Medicare), and it's withheld from every paycheck, not paid as one lump sum. If you're comparing a job offer in a different state, or considering relocating, running the actual numbers for your specific income and state bracket structure — not a rough headline rate — is the only way to see the real difference in your take-home pay.