Managing payroll taxes for out-of-state employees means working through a fixed sequence: identify which state has the right to tax each employee’s wages, register with that state’s revenue department, unemployment agency, and often its Secretary of State before running the first payroll, withhold and deposit under that state’s rules, add on any local taxes, paid leave contributions, disability programs, and workers’ compensation coverage the work state requires, and report each state’s wages separately on the year-end W-2. A single employee is enough to trigger all of it.
Figure Out Which State Can Tax the Wages
Everything downstream depends on this determination. Withhold for the wrong state and you’ve simultaneously created a missed obligation in one jurisdiction and an over-collection in another.
Physical Presence Is the Default
Most states tax wages where the work is physically performed. If your company sits in Texas and your employee works from a home office in Colorado, Colorado sources those wages. The employee’s residence and your company’s headquarters are secondary under this rule.
The Convenience of the Employer Rule
Five states reverse the default through a “convenience of the employer” doctrine: New York, Delaware, Nebraska, Pennsylvania, and Connecticut. If the employee could have performed the work at the employer’s in-state office, the wages are sourced to the employer’s state regardless of where the employee actually sat. New Jersey and Alabama apply conditional or retaliatory versions aimed mainly at employees who live in states with similar rules.
New York’s version is the most aggressive. Wages are taxed in New York unless the employer can show the remote arrangement exists because of genuine business necessity rather than the employee’s preference. An employee who lives in New Jersey and works remotely for a New York-based employer for their own convenience will have wages claimed by New York; the employee may also owe New Jersey tax as a resident and will resolve the overlap through a credit on the personal return.
De Minimis Day Thresholds
Not every day of work in another state triggers withholding. A growing number of states apply a minimum day-count threshold before withholding kicks in during a calendar year. Examples include Maine at 12 days, New York at 14 days, Georgia at 23 days per quarter, Illinois at 30 days, and Arizona and Hawaii at 60 days. States without a published threshold generally require withholding from the first day of work performed there. These thresholds change, so verify each relevant state’s rule at the start of each calendar year.
Reciprocal Agreements Between Neighboring States
When two states have a reciprocal agreement, you withhold only for the employee’s residence state even though the work is performed in the other. Common pairings include Virginia and Maryland, Ohio and Pennsylvania, and Kentucky and Indiana. About half the states with an income tax participate in at least one such pairing.
Two caveats. Reciprocity only applies if the employee files an exemption certificate with the work state claiming residency elsewhere; without that form on file, you’re technically required to withhold for the work state. And reciprocity covers income tax withholding only. It has no effect on state unemployment tax, paid leave contributions, or other work-state obligations.
What One Out-of-State Employee Triggers
For payroll purposes, nexus is easy to establish: one employee physically performing work in a state is enough to require income tax withholding registration and state unemployment coverage. Full-time, part-time, and temporary all count. The obligation begins the moment the employee starts working from the new state, which can mean registering and beginning to withhold before the first paycheck is issued from that location.
Foreign Qualification With the Secretary of State
Tax registration is not the only step. Having a remote employee in a new state often triggers a requirement to register your company as a foreign entity with that state’s Secretary of State. Most states treat an employee working regularly from within their borders as “doing business” in the state, and full-time remote workers almost always meet the “regular and ongoing” standard states apply.
Skipping this step has consequences. A company that hasn’t qualified as a foreign entity can be barred from filing lawsuits in that state’s courts, and most states impose monetary penalties for operating without proper registration. Fees typically run between $100 and $750 depending on state and entity type. It’s a one-time filing, and it needs to happen before or shortly after the employee begins working.
Registering With State Tax and Unemployment Agencies
Once nexus exists, you register with two separate agencies. The state Department of Revenue (or equivalent) issues a withholding tax identification number for remitting withheld income taxes. The state Department of Labor issues a state unemployment insurance account number for quarterly SUTA filings. Both numbers must be in hand before you run the first payroll sourced to that state.
You’ll need your Federal Employer Identification Number, your legal business structure, and an estimate of wages you expect to pay in the state. Many states offer a combined online registration portal, but even with a single application, the two agencies often issue account numbers on different timelines. Track each application. If the SUTA number hasn’t arrived by quarter-end, you risk missing the quarterly filing deadline and picking up penalties.
Your legal name and FEIN on state registrations must match your federal records exactly. Even a minor discrepancy between state filings and IRS records can produce rejected filings, processing delays, and cascading penalty notices.
Workers’ Compensation Coverage
Workers’ comp coverage is determined employee by employee, and in most states it must comply with the laws of the state where the employee performs the work. An employee working from home in Washington while your company is based in Ohio likely needs a Washington workers’ comp account covering that employee. Some states have reciprocal arrangements allowing temporary cross-border work under the home state’s policy, but full-time remote employees generally need coverage in their work state. Failing to carry the required coverage exposes you to penalties, claim liability, and potentially criminal sanctions depending on the state.
Withholding, Dual Withholding, and Deposits
Mechanically, state income tax withholding mirrors the federal process with state-specific tables, forms, and deposit schedules. The employee completes the state’s withholding certificate (the state equivalent of Form W-4) specifying filing status and any additional withholding. You calculate withholding using the state’s percentage method or wage bracket tables under the rules of whichever state the income is sourced to.
When Two States Both Claim the Same Wages
Where no reciprocal agreement covers the pairing, you may need to withhold for both. An employee who lives in State A and works in State B will have taxes withheld for State B based on the wages earned there, and simultaneously have State A taxes withheld based on total resident income. This does not mean the employee pays double tax; it means two states collect up front and the employee resolves the overlap through a credit on the personal return. On the payroll side, you calculate each state’s withholding independently using its own tables and rates. The two are not netted against each other.
Deposit Schedules Vary by State
Each state sets its own remittance frequency, typically based on total volume withheld. Most require electronic funds transfer for payroll tax deposits. The federal schedule is a useful reference point: employers whose total tax liability during the lookback period was $50,000 or less deposit monthly, those above that threshold deposit on a semi-weekly schedule, and any employer accumulating $100,000 or more in a single day must deposit by the next business day.1Internal Revenue Service. Publication 15 (2026), (Circular E), Employer’s Tax Guide State deadlines follow similar logic but with their own thresholds. Keep a calendar of deposit due dates across every jurisdiction where you have employees.
State Unemployment Taxes Follow the Work
SUTA liability follows where the work is physically performed, regardless of where the employee lives or where the company is headquartered. This is independent of any income tax reciprocal agreement. Even when reciprocity lets you skip income tax withholding for the work state, you still owe SUTA to that state if the employee physically works there.
New Employer Rates
When you register for SUTA in a new state, you’re assigned a default new employer rate, generally higher than what established employers pay. Across states, these initial rates typically fall between about 2.7% and 4.1%. After your business builds enough payroll history and claims data in the state, the rate adjusts annually based on your experience rating. Fewer unemployment claims from former employees mean a lower rate over time. Missing a quarterly filing can jeopardize your experience rating and lead to a higher default rate.
Wage Bases Vary Dramatically
SUTA applies only to the first portion of each employee’s annual wages, and the taxable wage base varies enormously by state. The federal floor sits at $7,000 per employee.2Office of the Law Revision Counsel. 26 US Code 3306 – Definitions Most states set their base well above that. As of 2026, state SUTA wage bases range from $7,000 to over $78,000, with 28 states adjusting their base annually. The same employee can generate dramatically different SUTA costs depending on which state sources the wages.
Protect Your FUTA Credit
The Federal Unemployment Tax Act imposes a 6% tax on the first $7,000 of each employee’s wages, but employers who pay their state unemployment taxes on time receive a credit of up to 5.4%, reducing the effective FUTA rate to 0.6%. Falling behind on SUTA in any state can cost you that credit, effectively multiplying your federal unemployment tax by a factor of ten. States that have borrowed from the federal government to fund their unemployment programs and haven’t repaid the loans may also trigger a credit reduction for every employer in that state, regardless of individual compliance.3Internal Revenue Service. FUTA Credit Reduction
Local Taxes, Paid Leave, and Disability Insurance
State-level obligations are only part of the picture. Several categories of local and state-mandated programs add payroll complexity, especially when an employee relocates to a jurisdiction with obligations you’ve never dealt with.
Local Income and Payroll Taxes
A handful of states authorize cities or counties to impose their own income or payroll taxes with separate employer withholding requirements. The states with the most widespread local income tax systems are Indiana, Kentucky, Maryland, Michigan, Ohio, and Pennsylvania. In these states, you may need to withhold a local tax based on where the employee works, lives, or both. Outside them, individual cities including New York City, Newark, St. Louis, Kansas City, and Portland impose payroll-based taxes. Rates are small individually but each locality has its own registration, filing, and deposit requirements.
Paid Family and Medical Leave
As of 2026, at least 13 states plus the District of Columbia operate mandatory paid family and medical leave programs funded through payroll contributions. Deductions come from employees, employers, or both, with total premium rates generally at 1% or less of taxable wages. States with active PFML programs include California, New Jersey, Rhode Island, New York, Washington, Massachusetts, Connecticut, Oregon, Colorado, Delaware, Minnesota, and Maine; Maryland is scheduled to begin in 2028. Delaware and Minnesota launched in 2026, and Maine’s program starts in May 2026. Employer contribution obligations vary by state and often depend on company size, with small employers sometimes exempt.
State Disability Insurance
Five states require short-term disability insurance coverage: California, Hawaii, New Jersey, New York, and Rhode Island. In some the premium is funded entirely by employee payroll deductions; in others the employer shares the cost. An employee working in one of these states means registering for the program and beginning to collect or contribute the required premiums, even if your home state has no equivalent requirement.
Year-End W-2 Reporting for Multi-State Wages
Every employee with wages sourced to more than one state needs a W-2 that reports each state’s data separately. Boxes 15 through 17 report the state abbreviation, your state employer identification number, and the wages and taxes withheld for that state. If you withheld for two states, the W-2 must include a separate line for each. The employer name and FEIN on the W-2 must match exactly what you used on federal employment tax returns.4Internal Revenue Service. General Instructions for Forms W-2 and W-3 (2026)
Accurate state-specific W-2 data matters for the employee too. Employees with income sourced to a non-resident state file a non-resident return there reporting only the income earned in that state, and a resident return in their home state reporting all income. The resident state grants a credit for taxes paid to the non-resident state, but the credit calculation depends on clean state-by-state figures on the W-2.
What Happens If You Don’t Do This
The risks compound. A state that discovers you had an employee working within its borders without registering can assess back taxes, penalties, and interest going back to when the obligation first arose. Most states have no statute of limitations for unfiled returns, so the lookback period is effectively unlimited if you never registered.
Late or missing SUTA filings put your FUTA credit at risk, turning a 0.6% federal unemployment tax into the full 6% rate on every dollar of taxable wages in that state.3Internal Revenue Service. FUTA Credit Reduction Failure to qualify as a foreign entity with the Secretary of State can bar the company from enforcing contracts or filing lawsuits in that state’s courts. Incorrect W-2s that omit state wage data create problems for employees at tax time that flow back to you as corrections and complaints.
Many states offer voluntary disclosure programs that let employers come into compliance with reduced penalties, but those programs typically require the employer to come forward before the state initiates contact. Once the state reaches out first, the voluntary disclosure option usually disappears. If you discover you’ve had an employee working in a state where you’re not registered, addressing it proactively is almost always cheaper than waiting for the state to find you.