State income tax varies from none at all to a double-digit top rate, and it applies to where the work is performed rather than where the employer sits. On a professional salary the difference between a no-tax state and a high-tax one can be several percent of take-home — enough to reverse a comparison between two offers that looked clearly separated on gross.
The number that is not in your salary comparison
Two offers arrive, one for $100,000 and one for $95,000, and the first looks like the obvious winner. Then you notice that the first is in a state charging a top rate over ten percent and the second is in a state charging nothing. The gap on gross was five thousand dollars, and the gap on what reaches your account may run the other way. State income tax is the easiest adjustment to make and the one most often skipped.
It gets skipped because base salary is what appears in the offer and everything else takes a calculation. It applies to your whole salary rather than a slice of it, which is exactly why it moves answers so reliably. On six figures the difference between the extremes is several thousand dollars a year before any other cost is considered. That is a larger number than most people win in a negotiation.
Four structures, and which one you are in
Some states levy no income tax on wages at all, which is the simplest case and the one people know about. Others charge a single flat rate on all taxable income, so the arithmetic is one multiplication and there is no bracket to reason about. Most use progressive brackets, where the headline rate applies only to income above a threshold. And several cities and counties add their own income tax on top of whichever state structure applies.
Knowing which of the four you are looking at decides how you estimate the bill. A flat state is comparable at a glance, a progressive one needs an effective rate, and a local layer needs a separate lookup entirely. People routinely compare a flat state’s rate against another state’s top bracket and reach a conclusion neither number supports. The structures are published and the check takes minutes.
The states with no income tax on wages
Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington and Wyoming levy no state income tax on wages. New Hampshire taxes some investment income but not wages, which puts it in a category of its own. For somebody on a professional salary those states represent a real and permanent difference in take-home. It applies every year rather than once.
That advantage is real and it is not free. States raise revenue somehow, and the usual substitutes are property tax, sales tax, or lower public spending. A homeowner in a no-income-tax state with high property taxes may be no better off at all. The comparison has to include more than one line, and property tax is the line that most often reverses it.
Why the headline rate is the wrong number
In a state with brackets, the top rate applies only to income above a threshold rather than to everything you earn. Your effective rate, which is total tax divided by total income, is always lower than the headline and sometimes substantially so. Comparing two headline rates therefore compares two numbers that neither person will actually pay. It is the most common error in this whole area.
States also differ on deductions, exemptions, and whether they follow the federal treatment of retirement contributions. Two states with identical headline rates can produce different bills on identical income for that reason alone. A state that exempts a chunk of retirement contribution is quietly cheaper for somebody contributing heavily. Use a calculator that takes your actual figures rather than a table of top rates.
Local taxes are the ones people miss
Several cities and counties levy their own income tax on top of the state, and that layer almost never appears in state-by-state comparisons. It can be worth more than the difference between the two states you are comparing. Somebody moving to a cheaper state and into a city with a local levy can end up paying more overall. The state-level headline gave them no warning at all.
Check the city as well as the state, particularly in the Midwest and the Northeast where local income taxes are most common. Some of them apply to non-residents who merely work there, which catches commuters specifically. The rates are published by the city or county revenue office. It is a five-minute check that occasionally changes the ranking of two offers.
Working in one state and living in another
Generally you owe tax where you work and where you live, with a credit that prevents the same income being taxed twice. The mechanics vary between state pairs, and some neighboring pairs have reciprocity agreements that hand the whole thing to your home state. Where one exists it removes most of the complication and usually a filing obligation with it. Where none exists, expect to file in both states.
If you are considering a move that puts a state line between home and office, check this before signing rather than at filing time. The answer occasionally changes whether the move makes financial sense at all. It also determines what your employer should be withholding from the first paycheck. Getting that wrong creates a cash-flow problem even when the eventual total is correct.
Where remote work complicates it
Working remotely from a different state than your employer raises the question of which state may tax the income. A few states apply rules that treat you as working at the office regardless of where you actually sat. The temporary arrangements that softened this during the pandemic have largely lapsed. Anybody still operating on a 2020 understanding is working from assumptions that may no longer hold.
This area is genuinely unsettled and the answer depends on the specific state pair. It is one of the few situations where paying for an hour of professional advice is straightforwardly worth the money. The cost of getting it wrong is a bill you did not budget for, arriving a year late. Ask before the arrangement becomes established rather than afterwards.
Running the comparison properly
Take each offer’s gross figure and write it down. Subtract estimated state and local income tax using effective rates rather than headline ones. Subtract your realistic housing cost in each place, which usually dominates everything else on the list. Then compare what is left, which is the only number that describes your actual position.
What generally survives is a smaller gap than the raw salaries suggested and a larger one than no-income-tax enthusiasm implies. Both extremes are wrong and the arithmetic is not difficult. Doing it takes twenty minutes with a payroll calculator and a rental listing. Not doing it means choosing between two numbers that were never comparable.
What tax should not decide
Tax should not decide whether the market for your occupation is deep where you are going. A few thousand dollars of annual saving is erased quickly by a thin local market if the job ends. Check your occupation’s employment level and median in the destination metro before anything else. That is the number that governs your position in a bad year.
Tax is a real factor and it is the last one to apply rather than the first. Work out whether the destination is a market for you, then whether the offer is good for that market, then what the tax does to it. In that order the tax question is a refinement. In the wrong order it is how people move somewhere they cannot get a second job.
This is general information rather than tax advice, and your own position depends on your filing status, income mix and the specific states involved.
Common questions
Which state taxes my income?
Generally the one where the work is performed. Some neighboring state pairs have reciprocity agreements that assign it to your state of residence instead.
Is a no-income-tax state always better?
No. Those states fund themselves through sales, property and other taxes, which appear in the local price level. Applying the tax rate alone tells you the flattering half of the story.
Should I compare headline or effective rates?
Effective — total tax over total income. In a progressive state most of your income is taxed below the top rate, so headline rates overstate the difference.
Do cities levy income tax too?
Several do, on top of the state. It is easy to miss because it does not appear in a state-level comparison, and where it exists it is not trivial.
How much can this move a comparison?
Several percent of take-home on a professional salary, which is enough to reverse a comparison between two offers that looked clearly separated on gross.
Which states have no income tax on wages?
Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington and Wyoming. New Hampshire taxes some investment income but not wages.
Should I use the headline tax rate?
No. Most states use brackets, so your effective rate — total tax over total income — is always lower, sometimes substantially.
What do people miss most often?
Local income taxes levied by cities and counties, which rarely appear in state comparisons and can outweigh the difference between two states.