Background

State income tax withholding rules grew more complex as remote work expanded. Historically, withholding was usually tied to the employer’s location. Today, most states determine withholding obligations using employee residence, worksite, or a mix of residency and source rules. This shift means employers with remote staff must treat withholding as a multistate compliance issue rather than a single‑state payroll task.

How withholding obligations are typically decided

  • Residence vs. source: Many states with income tax require withholding based on the employee’s state of residence. Other states tax wages sourced to work performed there.
  • Reciprocity agreements: Some neighboring states have reciprocity (for example, certain PA–MD or MI–WI arrangements) that let residents exempt withholding from the work state if they file the correct form with their employer. Check each state’s rules.
  • Convenience-of-the-employer rules: A few states (notably New York) treat work performed remotely for the employee’s convenience as sourced to the employer’s state unless an exception applies; that can create withholding obligations even when the employee lives elsewhere.
  • Multiple states and day allocation: If an employee works in multiple states, employers may need to prorate wages and withhold for each state according to days or hours worked in each jurisdiction.

Practical steps employers should take

  1. Maintain a location registry: Require employees to confirm their home work state and any other states where they regularly perform work. Track changes and effective dates.
  2. Run a nexus/registration review: If employees create a presence (payroll, withholding, unemployment insurance, or sales nexus) in another state, register for withholding and unemployment accounts before payroll runs. (See state tax agencies directory: https://www.taxadmin.org/state-tax-agencies.)
  3. Check reciprocity and nonresident withholding forms: Offer and collect state-specific withholding forms where applicable to avoid unnecessary withholding.
  4. Use payroll providers or automation: Reputable payroll platforms (ADP, Gusto, Paychex) handle multistate calculations, but verify settings and test scenarios each quarter.
  5. Document policies and audits: Keep written policies on telework, time tracking, and who is responsible for updates. Perform quarterly reviews of employee locations and withholding settings.

Real-world examples

  • Remote hire in a no-income-tax state: A California company employs a worker who lives and performs all work in Texas. Texas has no state income tax, so the employer generally won’t withhold California personal income tax as long as the work is performed solely in Texas. But the employer should still confirm withholding policy and verify that no New York–style sourcing rules apply.
  • Multiple-state telecommuting: An employee lives in New Jersey, works three weekdays in New Jersey and two in New York. The employer must evaluate New Jersey residency rules, New York source rules, and may have to withhold in both states or require the employee to file credits on state returns.

Who is affected

  • Any employer with employees working remotely from a different state than the employer’s business location. This includes full-time remote workers, hybrid employees, and short-term cross‑state telecommuters.
  • Payroll administrators, HR leaders, and small business owners that lack robust payroll compliance processes.

Common mistakes to avoid

  • Assuming the employer’s state controls withholding. Remote employees often create withholding obligations in their home or work states.
  • Ignoring convenience-of-the-employer and sourcing rules that can override residency in some states.
  • Delaying registration. Failing to register for withholding or unemployment accounts can trigger penalties and back taxes.
  • Relying on employee self-certification without verification. Keep documentation of addresses, work locations, and hours.

Professional compliance checklist (quick)

  • Confirm employee primary work location and update W-4/state equivalents.
  • Search state reciprocity and nonresident withholding rules where employees work.
  • Register for withholding and unemployment accounts in states where required.
  • Configure payroll software for multistate withholding and test payroll before the first pay run.
  • Retain records showing when employees changed locations.

Tools and tech

Payroll vendors and workforce-management tools can simplify multistate withholding, but do these checks yourself regularly. Automation reduces errors but does not replace the need to interpret unusual rules (e.g., convenience-of-the-employer).

Further reading and internal resources

Authoritative sources

Frequently asked questions

Q: If an employee works remotely part of the year from another state, when should I change withholding?
A: Update withholding when the employee’s primary work location or residency changes. Retain documentation showing the effective date. If work is regularly split between states, withhold per each state’s allocation rules.

Q: Do I need to register in every state where I have a single remote employee?
A: Possibly. Registration requirements depend on the state and type of tax (income withholding, unemployment insurance). Even one remote employee can trigger withholding and unemployment registration in some states.

Q: Can I rely on payroll vendors to manage this entirely?
A: Vendors help, but you remain legally responsible for correct withholding and registration. Verify vendor configurations and keep records.

Professional disclaimer

This article is educational and does not replace legal or tax advice. Employers should consult a qualified tax advisor or state tax authority for guidance tailored to their specific situations.

Last reviewed: 2025