Overview

Moving to a new state or working remotely for an out‑of‑state employer can create state tax obligations you didn’t expect. State laws differ on how they define residency, what counts as state‑sourced income, and when a state can require withholding or a tax return. In my 15+ years of advising clients, the most common issue I see is poor documentation of the move—leaving the taxpayer unable to prove they changed domicile or that work was performed outside the taxing state.

This article explains the practical rules, common traps, and a step‑by‑step checklist to reduce risk. It is educational and should not replace personalized tax advice—consult a CPA or state tax attorney for your facts.

Sources and further reading: IRS general guidance (https://www.irs.gov/), Tax Foundation analysis (https://www.taxfoundation.org/), and state Departments of Revenue.

How states generally decide who they can tax

Two concepts drive state income tax obligations:

  • Domicile and residency: Your domicile is your permanent legal home. You can only have one domicile at a time. States use different residency tests—many apply a 183‑day presence test or look at whether you maintain a permanent place of abode. If a state considers you a resident (or domiciliary), it can tax your worldwide income.

  • Source (situs) rules and nonresident taxation: If you are a nonresident, a state can generally tax income that has source in that state—wages for work performed inside the state, business income earned from in‑state activities, rental income from property located in the state, and certain retirement or partnership allocations.

Remember: the 183‑day rule is common but not universal. Some states place heavier weight on domicile or on where your family, voter registration, and driver’s license are located.

(For more on residency tests, see our guide: State Residency Rules: How They Affect Your State Tax Obligations).

Common scenarios and how states usually treat them

1) You moved midyear

  • You typically file a part‑year resident return in the state you left and a part‑year or resident return in your new state for the period you lived there. Income is allocated to each state based on where it was earned. See our guide on mid‑year moves for filing specifics: Mid‑Year Move Between States: Filing and Residency Impacts.

2) You live in State A and work remotely for an employer in State B

  • Most states tax residents on all income and nonresidents only on state‑source income. If you live in State A and do all your work from home in State A, State B generally cannot tax the wages unless a unique rule applies.
  • Important exception: New York’s “convenience of the employer” rule (and similar doctrines in a few jurisdictions) can require nonresidents who perform remote work for NY‑based employers to pay New York tax unless the remote work is for the employer’s convenience and the employer requires the work be performed outside NY. Check the employer’s payroll withholding and consult with counsel if your employer is in NY.

3) You regularly travel and split time between states

  • States apply day‑count tests and look at ties (home, family, business). Multiple states taxing the same income can happen—then credits and allocation rules apply.

Practical steps to change your state tax home (documented checklist)

In my practice, clients who follow a disciplined documentation routine avoid audits and unintended tax liabilities. Key steps:

  1. Establish a clear physical move date and keep proof: closing/lease papers, utility bills, moving receipts, and airline/train tickets.
  2. Change key legal ties immediately: get a driver’s license, register to vote, and update your primary address with the USPS.
  3. Update financial and professional ties: move bank accounts, notify your employer of the new address, and, if applicable, update business registrations.
  4. Reduce ties to the old state: sell or rent the former home, terminate local clubs or memberships, and remove primary physicians if you’ve relocated permanently.
  5. Keep a contemporaneous day‑by‑day log for the first 12 months showing where you worked and why (client meetings, office visits, vacations). A calendar with meeting locations helps in audits.

Documenting intent matters as much as physical presence—keep everything together in a relocation binder or secure digital folder.

Employer withholding and payroll considerations

Employers are generally required to withhold state income tax where the employee performs services, but rules differ:

  • Employers may still withhold for the employer’s state or where the employee used to live until payroll is updated. Update HR immediately after a move.
  • Some employers follow the employee’s state of residence for withholding; others follow the company’s location or where work is performed.
  • Inform payroll and provide any required withholding certificates (e.g., state nonresident withholding forms or reciprocity exemption forms).

If your employer withholds incorrectly, you may reclaim over‑withheld tax when you file state returns, but you should aim to fix withholding proactively to avoid cash flow issues.

Credits, reciprocity, and avoiding double taxation

Most states provide a credit for taxes paid to another state on the same income, but credits are limited to taxable income and the tax that would have been due on that income in your resident state. Carefully allocate income on part‑year returns to avoid overpayment.

Reciprocity agreements between some neighboring states allow residents to opt‑out of nonresident withholding. Check your state’s Department of Revenue page for reciprocal agreements and the process to file exemption forms.

Common tax traps and mistakes I see

  • Failing to document a move. Without proof of domicile change, an old state can assert residency and tax worldwide income.
  • Ignoring convenience‑of‑employer rules. New York is the most common surprise—remote work for a NY employer can still trigger NY tax.
  • Assuming no tax because you live in a no‑income‑tax state. States that levy no broad‑based personal income tax (examples include Florida, Texas, Washington, Nevada, Wyoming, South Dakota, Alaska, Tennessee, and New Hampshire—NH taxes interest/dividends only) still permit other states to tax income sourced there.
  • Not coordinating with your employer on withholding and tax withholding certificates.

When to hire a professional

If you have any of the following, get professional help before you move or immediately after:

  • High income, complex investment or partnership allocations
  • Frequent interstate travel and split work locations
  • A nexus‑creating business activity or telecommuting that could trigger corporate or payroll tax obligations for your employer
  • Potential eligibility for domicile‑related tax benefits or residency audits

In my experience, an hour of planning before a move often saves thousands in state tax, penalties, and interest.

Quick reference — what to check right now

  • Which state will consider you a resident under its laws? (Domicile vs. statutory residency)
  • Does your employer have offices in multiple states and what are their withholding policies?
  • Do any states involved have special rules (e.g., New York’s convenience‑of‑the‑employer doctrine)?
  • Are there reciprocity agreements to avoid withholding?
  • Have you documented the move and changed key legal ties?

Further reading: our practical guide to filing taxes for remote workers covers residency and withholding in detail: Filing State Taxes for Remote Workers: Residency Rules.

Professional disclaimer
This article is educational and reflects general rules and my practical experience. It is not tax, legal, or financial advice for specific situations. State tax law changes; check your state Department of Revenue and consult a qualified tax professional for an opinion tailored to your facts.

Authoritative sources