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Tax Planning

Moving to Another State: Domicile, Residency Tests, and Taxes

Moving does not end your old state's tax by itself. You need a new domicile, to stay clear of its day-count rules, and to watch income it can still source.

Moving to Another State: Domicile, Residency Tests, and Taxes

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Does moving to a lower-tax state end your old state's income tax?

  • Not automatically: your old state can keep taxing you as a resident until your domicile has changed and you stay clear of its statutory residency rules.
  • Even after a clean move, income sourced to the old state, such as pay for work performed there, can stay taxable.
  • California and New York examine the facts of a move in detail, so records matter as much as the move itself.
  • Starting the move well before a large sale or equity event leaves time to establish the new domicile.
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Full Guide

Does moving to a lower-tax state end your old state's income tax?

  • Not automatically: your old state can keep taxing you as a resident until your domicile has changed and you stay clear of its statutory residency rules.
  • Even after a clean move, income sourced to the old state, such as pay for work performed there, can stay taxable.
  • California and New York examine the facts of a move in detail, so records matter as much as the move itself.
  • Starting the move well before a large sale or equity event leaves time to establish the new domicile.

What is the difference between domicile and statutory residency?

  • Domicile is your one permanent home, the place you intend to return to; you can have several residences but only one domicile.
  • Statutory residency can make you a resident even when your domicile is elsewhere, based on days present and a home in the state.
  • New York treats you as a resident if you keep a permanent place of abode there for substantially all the year and spend 184 or more days there.
  • California has no simple day count: it presumes residency after more than nine months in the state in a year and otherwise weighs where your closest connections are.

Counting days and keeping records

  • In New York, any part of a day counts as a full day, and you need not be at your home there for the day to count.
  • Travel itineraries, card statements, phone location data, and calendars are the kinds of records used to reconstruct days.
  • Records of where you live, work, bank, vote, see doctors, and keep your belongings support the domicile side.
  • Updating a driver's license and voter registration helps, but neither settles domicile on its own.

What do California and New York look at when you leave?

  • California's FTB weighs factors such as where your spouse and children live, where you vote, bank, and hold licenses, and where you own or rent a home.
  • California offers a safe harbor for people absent on an employment contract for at least 546 consecutive days, subject to conditions.
  • New York requires clear and convincing evidence that you abandoned your New York domicile; filing a domicile certificate or registering to vote elsewhere is not enough.
  • A home kept available in New York can count as a permanent place of abode for the statutory residency test, even if you rarely use it.

How does a move interact with a liquidity event?

  • Gain on stock and other intangibles is generally sourced to where you live when you sell, so the date residency changes matters.
  • California still taxes installment payments on stock sold while you were a resident, even if they arrive after you move.
  • Equity pay is sourced to where you worked: California allocates NSO income by California workdays from grant to exercise, and restricted stock income from grant to vesting.
  • A disqualifying ISO sale after leaving is treated like NSO income and allocated the same way; a qualifying ISO sale as a nonresident is generally not California-source.

Estate and inheritance taxes by state

  • The federal estate tax exemption is $15 million per person for 2026 under the One Big Beautiful Bill Act, indexed for inflation after that.
  • Twelve states and Washington, D.C. levy their own estate tax, some with far lower exemptions; Oregon's starts at $1 million.
  • Five states (Kentucky, Maryland, Nebraska, New Jersey, and Pennsylvania) levy an inheritance tax; Iowa's ended for deaths from 2025.
  • Real estate is generally taxed by the state where it sits, so a home kept in the old state can keep an estate tax exposure there.

Remote work, the SALT cap, and total cost

  • Working remotely for an employer in another state can create filing obligations in more than one state.
  • New York generally taxes a nonresident's pay for days worked from home for the employee's convenience rather than the employer's necessity.
  • For 2026 the federal SALT deduction is capped at $40,400, reduced at higher incomes but not below $10,000, so state tax remains largely a real cost.
  • Property tax, sales tax, and insurance differ widely between states, so comparing total costs gives a fuller picture than income tax alone.

Key takeaways

  • A move changes your tax residence only when both the domicile and statutory residency tests point to the new state.
  • Day logs and a clear break from the old state are the evidence that supports a move.
  • California and other states can still tax equity pay earned while you worked there and installment gains from sales made while resident.
  • Rubric Advisors does not prepare tax returns or provide legal advice; confirm residency questions with a CPA or attorney who handles multi-state taxation.
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