Overview

Remote work raised new state tax questions after 2020. States apply different tests to decide whether you are a resident (taxed on worldwide income), a nonresident (taxed on income sourced to that state), or a part‑year resident. Employers and employees both have obligations: employers may need to withhold in the state where you live or where your employer is located; employees must file the correct state returns and claim credits where available. For an accessible primer on reciprocity and commuting rules, see FinHelp’s guide to State Income Tax Reciprocity: What It Means for Commuters.

Key rules and how they affect you

  • Residency tests: Most states use either a domicile test (your permanent home) or statutory residency (days spent in state, often 183 days or similar). Each state defines these differently — check your state’s department of revenue. (See the Tax Foundation for state-by-state context.)

  • Sourcing wages: States generally tax wages where the work is performed. If you perform services while physically present in State A, that income is typically sourced to State A even if your employer is in State B.

  • Withholding: Employers typically withhold based on the employee’s state of residence or the employer’s business location depending on state law and employer practices. Remote workers should confirm payroll withholding with their employer to avoid under- or over-withholding.

  • Credits and nonresident returns: To avoid double taxation, most resident states offer a credit for taxes paid to other states. Nonresidents usually file a nonresident return in the state that sourced the income and a resident return in their home state claiming a credit.

Practical steps for remote workers (my workflow with clients)

  1. Confirm your state residency: Change of domicile requires intent and actions — update your driver’s license, voter registration, primary address, and ties like bank and tax records.
  2. Track your location: Keep a simple log (dates, city/state, reason) of where you worked each day. That evidence makes a big difference if states question residency or sourcing.
  3. Review payroll setup: Ask HR which state they use for withholding. If it’s incorrect, submit the correct state withholding form to your employer or make estimated payments to the right state.
  4. File correctly: Prepare to file a resident return in your home state and nonresident returns where income was sourced. Claim resident credits for taxes paid to other states where allowed.
  5. Use reciprocity when available: If your state has a reciprocity agreement with the work state, you can often ask your employer to stop withholding the other state’s tax. See FinHelp’s article on State Reciprocity Agreements for details.

Common scenarios and traps

  • The “employer-state withholding” trap: Employers who process payroll from their HQ state sometimes default to withholding there. Employees then face unexpected state returns and possible estimated tax bills.

  • Short trips and telework: Temporary work in another state can create a filing obligation if that state taxes income earned inside its borders. Even a few days can matter in some states.

  • Moving mid-year: You may need to file part‑year returns in both states and apportion income by dates or by source.

Employer obligations

Employers should monitor where employees perform work and withhold accordingly, register for state withholding where required, and update payroll systems for remote teams. Employers that ignore state rules risk penalties for unpaid withholding and payroll taxes. For employer-focused guidance, see FinHelp’s State Withholding for Remote Employees.

Avoiding double taxation — what to expect

Most resident states allow credits for taxes paid to other states, which reduces double taxation. Where credits aren’t available, apportionment or treaty-like reciprocity rules may help. The Tax Foundation maintains updated summaries of state individual income tax rules and rates that are useful when evaluating exposure.

Recordkeeping and documentation

Keep: lease or property records, voter registration, driver’s license, utility bills, payroll notices, daily work logs, and correspondence with HR about withholding. These documents are often decisive in residency or audit disputes.

When to get help

If you have income sourced to multiple states, significant travel, or a midyear move, consult a CPA or multistate tax professional. In my practice, clients who document days worked and confirm payroll settings avoid most surprises on filing.

Authoritative resources and further reading

  • Tax Foundation: state tax summaries and rates (taxfoundation.org)
  • Your state Department of Revenue website for residency, withholding, and nonresident filing rules
  • Consumer Financial Protection Bureau: resources on taxes and worker protections

Disclaimer

This article is educational and does not constitute tax advice. State tax laws change and outcomes depend on facts. Consult a qualified tax professional for advice tailored to your situation.