State income taxes when you move or work remote

Federal taxes follow you everywhere. State taxes follow rules that most people have never read — and remote work has turned those rules from trivia into real money. Move states mid-year, work from a different state than your employer, or split time between two homes, and you can easily end up with two states claiming the same paycheck. The rules are learnable, and the mistakes are almost all avoidable in advance.

How states decide you owe them

States tax you on two different theories. Your state of residence taxes ALL your income, no matter where you earned it. Any state where you physically work taxes the income earned there, even if you don't live there. When both apply, your home state generally gives you a credit for taxes paid to the work state — so you're usually not double-taxed, but you always pay at least the higher of the two rates.

Residency vs. domicile

Most states use two tests. 'Statutory residency' is mechanical: spend more than 183 days in the state (and keep a home there) and you're a resident, period. 'Domicile' is squishier: it's the place you intend to be your permanent home — where your life is centered. You can only have one domicile, and high-tax states famously do not let go of it easily. Moving your body is not enough; you have to move your life.

Moving mid-year: the part-year return

The year you move, you typically file part-year resident returns in both states. Each state taxes the income you earned while a resident there (plus any income sourced to it afterward). Your W-2 may or may not split this correctly — tell payroll your move date the week it happens, not at year-end, or you'll be untangling withholding in April.

Remote work: the traps

• The convenience-of-the-employer rule: a handful of states (New York is the famous one) tax remote employees of in-state companies as if they worked in-state, unless the remote arrangement is for the employer's necessity. Live in New Hampshire, work remotely for a Manhattan firm, and New York may still tax your wages.
• Working while traveling: technically, many states expect a nonresident return after as little as one day of work performed there. Enforcement focuses on longer stints and high earners, but a month of 'workcation' in another state can create a real filing obligation.
• Reciprocity agreements: many neighboring states (e.g., across the Midwest and mid-Atlantic) agree to tax border-crossing commuters only where they live. If you qualify, file the reciprocity exemption form with your employer so withholding goes to the right state.
• Your employer's payroll settings matter: if withholding goes to the wrong state all year, you'll eventually get the money back — but only after filing an extra return and floating the cash for months.

How to actually break up with a state

1. Change your driver's license, voter registration, and car registration within weeks of moving.
2. Update your address everywhere that matters: banks, brokerages, insurance, doctors, the IRS (Form 8822).
3. Move the anchors: primary doctor, dentist, accountant, place of worship, gym membership.
4. Keep a day-count log (an app or a calendar) if you still spend real time in the old state — under 183 days, provably.
5. Sell or rent out the old home if you can; a kept-and-empty house is the classic audit loser.
6. File a final part-year return in the old state — disappearing without one invites a letter.

The residency evidence, ranked

1. 1
   The hard anchors (do these first)

   Driver's license, voter registration, vehicle registration, and your federal tax mailing address. These are the documents auditors pull first, and they're all changeable within weeks of arriving.

2. 2
   The life anchors (do these within months)

   Primary doctor and dentist, bank branch relationships, gym, place of worship, and professional licenses. Auditors call this the 'center of life' evidence — where your Tuesday actually happens.

3. 3
   The day count (keep it forever, while both states matter)

   Under 183 days in the old state, provably — a location-logging app or a disciplined calendar. In a residency audit, the taxpayer bears the burden of proof, and 'I think I was mostly in Florida' loses to a state's subpoenaed cell records.

One nuance worth knowing before a big liquidity event: states tax income based on residency WHEN THE INCOME IS RECOGNIZED, with special rules for deferred compensation, options, and RSUs earned while working in the old state. Moving to Texas in March and selling your company in April genuinely works for the capital gain; moving in March while holding RSUs granted for New York work years does not erase New York's claim on those vests. Equity compensation earned across a multi-state career gets apportioned by workday formulas — a topic worth an hour with a CPA before, not after, the move or the vest.

The bottom line

State tax follows two questions: where do you live, and where do you physically work? Answer them cleanly — move your whole life when you move, tell payroll immediately, watch the 183-day line, and respect the convenience rule if your employer is in one of those states. The savings from a genuine move to a lower-tax state are real and repeat every year; the penalty for a fake one is a residency audit you will probably lose.