When you move to another state partway through the year, you usually owe each state tax only on the income you earned while you lived there. Your federal taxes don't change at all, but your state withholding should switch on the day your residency changes, and you'll likely file a part-year return in one or both states.
Most of the rules on moving states and taxes come down to timing and paperwork. This guide covers what happens on your paycheck, what happens at tax time, and a worked example using 2026 figures.
What changes and what stays the same
A move only affects the state and local parts of your paycheck. Everything federal is tied to your income and filing status, not your address.
- Stays the same: federal income tax withholding, Social Security (6.2% on wages up to $184,500), Medicare (1.45%), and any 401(k), health insurance or HSA deductions.
- Changes: state income tax withholding, any state payroll items such as disability or paid leave contributions, and local income taxes if your old or new city has one.
Because Social Security and Medicare don't reset when you move, a move doesn't restart the Social Security wage base. If you change employers as part of the move, though, each employer withholds Social Security separately, which can matter for high earners. Our guide to the Social Security wage base explains how that works.
Moving states and taxes: how part-year residency works
Most states that tax wages treat you as a part-year resident in the year you arrive or leave. In general, a part-year resident pays that state's tax on all income received while a resident, plus any income from sources in that state during the rest of the year.
In practice, that usually means two state returns for the year of the move:
- A part-year return for the state you left, covering wages earned before the move.
- A part-year return for the state you moved to, covering wages earned after the move.
If one of those states has no wage tax, you only file in the other one. The nine states with no tax on wages are Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington and Wyoming. See our list of states with no income tax for details.
How states split deductions and exemptions
States don't all handle the split the same way. Some prorate the standard deduction or personal exemption by the share of income earned while a resident. Others calculate tax as if you lived there all year, then multiply by the share of income that belongs to the state. That's why the final bill on a part-year return can differ a little from what was withheld. Check the instructions for each state's part-year return, or ask a tax professional if your situation is complicated.
What to do with your employer when you move
Your employer withholds state tax based on the address and work location in its payroll system. If you don't update it, the wrong state's tax may keep coming out of your pay.
- Update your home address in your payroll or HR portal as of your actual move date.
- Fill out the new state's withholding form if it has one. Some states use their own certificate; others rely on your federal Form W-4.
- Check your first pay stub after the move. The state line should show the new state. If your new state has no wage tax, the state withholding line should drop to zero.
- Ask about local taxes. If you move into or out of a city or county with its own income tax, that line should start or stop too.
If you keep the same job but work remotely from the new state, the rules can get more involved, because the state where your employer is located may still claim some of your wages. Our guide to remote work and state taxes covers that case.
Worked example: moving from Illinois to Texas
Say you're single, earn a $72,000 salary paid biweekly (26 paychecks), and move from Illinois to Texas on July 1, with 13 paychecks in each state. Illinois taxes wages at a flat 4.95% after a $2,925 personal exemption; Texas has no state income tax. Here's what one paycheck looks like in each state, based on our calculator:
| Per biweekly paycheck | Living in Illinois | Living in Texas |
|---|---|---|
| Gross pay | $2,769.23 | $2,769.23 |
| Federal income tax | $269.62 | $269.62 |
| Social Security | $171.69 | $171.69 |
| Medicare | $40.15 | $40.15 |
| State income tax | $131.51 | $0.00 |
| Take-home pay | $2,156.26 | $2,287.77 |
After the move, each paycheck grows by about $132. Over the 13 Illinois paychecks, about $1,710 in Illinois tax is withheld. That's roughly what you'd expect to owe Illinois on a part-year return for those wages, though Illinois's own rules for prorating the exemption decide the exact figure. You'd file nothing in Texas.
The reverse: moving into a state with an income tax
Now flip it. If the same $72,000 earner moves from Texas to Colorado, the calculator estimates Colorado withholding of $94.60 per biweekly paycheck, since Colorado taxes income at a flat 4.4% starting from federal taxable income. Over 13 paychecks that's about $1,230, and take-home pay falls from $2,287.77 to $2,193.17 per check. These are estimates; your own figures depend on your deductions and the state's part-year rules.
You can run your own before-and-after comparison with the paycheck calculator, or open the Illinois paycheck calculator, Texas paycheck calculator and Colorado paycheck calculator directly.
Common mistakes during a mid-year move
Leaving the old state on payroll
If your employer keeps withholding for your old state, you'll have too much tax paid there and too little in the new state. You can usually get the excess back on the old state's part-year return, but you may owe the new state a lump sum, and possibly a penalty for underpaying during the year.
Forgetting income other than wages
Interest, dividends, freelance income and capital gains also have to be split between the two states based on when you received them and where you lived at the time. If you have side income, keep records of the dates.
Assuming relocation pay is tax-free
Moving bonuses and relocation reimbursements from an employer are generally treated as taxable wages, and they often come through as supplemental pay. Look for them on your pay stub so they don't surprise you at tax time.
Not checking your residency date
States look at facts like where you live, where you're registered to vote, where your car is registered and where you hold a driver's license. Changing those around the same date makes your move date clear if a state ever asks.
Frequently Asked Questions
Do I pay tax to both states for the whole year?
Usually not. Each state generally taxes the income you earned while you were a resident there, plus any income sourced to that state during the rest of the year.
Does moving change my federal taxes?
No. Federal income tax, Social Security and Medicare are based on your income and filing status, not where you live. Only state and local taxes change.
Do I need a new W-4 when I move?
Your federal W-4 doesn't need to change because of a move alone. Your new state may have its own withholding form, so ask your employer which one to complete.
What if I move to a state with no income tax?
You'll still file a part-year return in the state you left, covering the wages you earned there. Your new state won't require a wage tax return.
Sources
- Tax Foundation: State Individual Income Tax Rates and Brackets, 2026
- IRS: About Form W-4, Employee's Withholding Certificate
- IRS Publication 15, Employer's Tax Guide
Run the numbers for your state
Written and checked against IRS, Social Security Administration and state tax agency publications for the 2026 tax year. General information, not tax, legal or financial advice. Read our editorial policy, calculation methodology and sources.