Background

Remote work has complicated long-standing state tax concepts. Traditionally, states taxed income earned within their borders and residents on worldwide income. The sharp rise in telework has increased multistate filing, withholding disputes, and audits as states adapt sourcing rules to capture revenue. In my practice advising remote employees and contractors, the common thread is documentation: where you worked on specific days often decides tax liability.

How sourcing rules work

  • Residency vs. source: States tax residents on all income (resident taxation) and nonresidents on income sourced to the state (source taxation). Which rule applies depends on whether you are a resident, part-year resident, or nonresident.
  • Work-location sourcing: Most states tax wages where the services are physically performed. If you physically work in State A, that income is typically State A source income.
  • Convenience-of-the-employer rules: A handful of states (notably New York) treat work performed remotely for the worker’s convenience as sourced to the employer’s state unless the remote work is required by the employer — potentially creating tax in the employer state even when the employee never set foot there (see New York guidance).
  • Reciprocity and credits: Many bordering states have reciprocity agreements that exempt nonresident wages from withholding; otherwise, you may file in both states and use a credit on your resident return to avoid double taxation.

Real-world examples

  • Example 1: Resident telecommuter. A Texas resident (no state income tax) works remotely for a Pennsylvania employer; Texas imposes no income tax, but Pennsylvania may still treat the income as sourced to Pennsylvania for withholding depending on the facts and any reciprocity agreement. If withholding occurs, the worker claims credits or refunds with Pennsylvania.
  • Example 2: Mid-year mover. If you move from New Jersey to Florida midyear, you file as a part-year resident in each state, allocate income to the period you lived in NJ, and claim any credits for taxes paid to other states for income earned while a resident.

Who is affected

  • Remote employees, freelancers, and contractors who live in a different state than their employer or who split work time across multiple states.
  • Commuters who cross state lines for occasional work or who travel for assignments.

Practical steps to comply

  1. Track days and location: Keep a simple log (date, city/state, hours) for the year; it’s the strongest support in audits.
  2. Review your state residency test: Domicile and statutory-residency rules vary; consult your state’s definitions.
  3. Check reciprocity: If your employer’s state and your home state have reciprocity, you may avoid dual withholding (see state reciprocity rules).
  4. Ask your payroll team about withholding: Request the correct withholding state on your W-4/IT-2104 equivalent to prevent unnecessary state withholding.
  5. File part‑year/nonresident returns as required and claim resident credits for taxes paid to other states to reduce double taxation.

Professional tips and strategies

  • In my experience, proactively updating employer payroll with your remote-work state and providing any reciprocity declaration form prevents many issues later.
  • Use calendar or time-tracking exports as contemporaneous evidence rather than relying on memory.
  • If you travel frequently for short assignments, aggregate the days by state quarterly to simplify withholding adjustments.

Common mistakes and misconceptions

  • Mistake: Assuming your employer’s state is automatically the taxing state. The key is where the services are performed.
  • Mistake: Ignoring convenience-of-the-employer rules — New York’s rule, for example, has surprised many purely remote workers.
  • Misconception: Reciprocity eliminates filing obligations; it may only affect withholding, not whether you must file a nonresident return in some states.

Frequently asked questions

  • Do I have to file in more than one state?
    Possibly. If you earned income sourced to a nonresident state, that state can require a nonresident return. Your home state typically allows a credit to prevent double taxation. (See multistate filing basics.)

  • What documentation do states accept for remote work days?
    Payroll records, VPN logs, calendar entries, meeting records, and travel receipts are commonly used; contemporaneous logs are strongest.

  • Who pays withholding when I live in one state and my employer is in another?
    Payroll should withhold according to where you perform work or per a reciprocity agreement, but many employers default to the employer-state — so confirm and correct withholding early in the year.

Related FinHelp resources

Professional disclaimer

This article is educational and does not replace personalized tax advice. State rules differ and change; consult a tax professional or your state tax agency for guidance specific to your situation.

Authoritative sources

(Last reviewed 2025.)