Remote work created a state tax problem that most employees and their employers never anticipated: multiple states may claim the legal right to tax the same paycheck. The federal government does not coordinate this. There is no federal rule that limits states to one taxpayer. Whether you owe income tax in one state, two states, or more depends on where your employer is located, where you physically work, and which states have reciprocity agreements with each other.
States assert income tax jurisdiction over individuals on two independent bases. The first is residency - your home state taxes all your income, regardless of where it was earned. The second is source - the state where you physically perform the work also taxes that income. When you work remotely from a different state than your employer, both states may have a valid legal claim.
The three questions to answer for every remote work situation:
1. What is your state of domicile (permanent home)? Your domicile state taxes all worldwide income. You can only have one domicile at a time. Changing domicile requires affirmative steps - it does not happen automatically by moving. California, New York, and several other states are aggressive about asserting continued domicile over taxpayers who relocate without severing ties.
2. What is your employer's state? Some states - notably New York - assert the right to tax income earned by employees of in-state employers even when the employee physically performs the work elsewhere. This is the "convenience of employer" rule, covered in detail below.
3. Do you have a reciprocity agreement? Some states have bilateral agreements that provide that only one state taxes the income of residents who cross the border to work. If a reciprocity agreement applies, you file only in your home state and provide your employer a withholding exemption certificate for the work state.
The rule originates from New York Tax Law §601 and has been consistently upheld by New York courts and the New York State Tax Appeals Tribunal. The leading cases are Huckaby v. New York State Division of Tax Appeals (2004) and Zelinsky v. Tax Appeals Tribunal (2003, cert. denied by US Supreme Court 2003). The Supreme Court's denial of certiorari in Zelinsky left the New York rule intact.
To escape New York taxation under the convenience rule, the out-of-state work must be required by the employer's business - not merely permitted or preferred by the employee. New York applies four factors in its audit guidance:
First, the employer must maintain no office or facility in New York that the employee could use. Second, the nature of the work must require physical presence outside New York (for example, an employee who manages a manufacturing facility in Ohio that the employer operates there). Third, the employer must not have a permanent office in New York that the employee would otherwise use. Fourth, the employee must spend a majority of their working days actually in the state where the out-of-state office is located.
A software engineer in Florida whose employer's headquarters is in Manhattan, but who works remotely because they prefer Florida's climate (or taxes), does not meet the necessity test. New York treats that employee as having earned all wages in New York.
| State | Convenience Rule? | Notes |
|---|---|---|
| New York | Yes | Most aggressive application. Applies to wages from NY employers. Leading case: Huckaby (2004). |
| Connecticut | Reciprocal only | CT applies convenience rule only to residents of states that apply the rule to CT residents. Currently applies reciprocally to NY residents working for CT employers. |
| Delaware | Yes | Similar rule. Less frequently litigated. DE employers' out-of-state remote employees may owe DE tax. |
| Nebraska | Yes | Nebraska applies convenience of employer rule to wages from NE-based employers. |
| Pennsylvania | Yes (pre-2020 guidance) | PA suspended the rule for COVID-era remote work in 2020 but has not made the suspension permanent. Verify current status before filing. |
| All other states | No | Tax only income physically earned within the state. Remote employees working from these states for out-of-state employers owe tax only to the home state (and potentially the source state where they physically work). |
Reciprocity agreements between states provide that residents of one state who earn income in the other state pay income tax only to their home state. The agreement eliminates double taxation without requiring the employee to file a nonresident return in the work state.
If a reciprocity agreement applies, the employee provides their employer with a withholding exemption certificate for the work state, and the employer withholds only for the home state.
| State Pair | Reciprocal Agreement | Employee Certificate |
|---|---|---|
| Virginia - DC, MD, NC, WV, KY, PA | Yes | VA Form VA-4 (exemption for work state) |
| Maryland - DC, VA, WV, PA | Yes | MD Form MW507 |
| Pennsylvania - NJ, IN, MD, VA, WV, OH, KY | Yes | PA Form REV-419 |
| New Jersey - PA | Yes | NJ Form NJ-165 |
| Michigan - Most surrounding states | Yes | MI Form MI-W4 |
| New York - Any state | None | NY has no reciprocity agreements. NY employees working in other states must file nonresident returns in both states and claim a credit for taxes paid to NY. |
| California - Any state | None | California has no reciprocity agreements. |
Most states require nonresidents to file a state income tax return if they have income from sources within that state above a threshold. The threshold varies significantly by state. Below are the most common rules:
Dollar thresholds: Many states require a nonresident return if income from that state exceeds a set amount - commonly $1,000 to $5,000, though some states have no threshold and require filing if any income is earned there.
Day thresholds: Some states trigger a filing obligation based on the number of days physically present. Connecticut requires nonresident filing if a person spends more than 183 days in the state in a year and maintains a permanent place of abode there (this converts a nonresident to a statutory resident). New York applies a similar rule.
New York statutory residency trap: A non-domiciliary of New York is treated as a New York resident - and taxed on all income - if they maintain a permanent place of abode in New York (including a rented apartment) and spend more than 183 days in New York during the year. "Day" is defined broadly: any part of a day counts. NY Tax Law §605(b)(1)(B).
The primary protection against double taxation for remote workers is the resident state's credit for taxes paid to another state. Most states allow residents to claim a credit, dollar-for-dollar, for income taxes paid to another state on the same income. This does not eliminate double filing - you still file a nonresident return in the work state - but it typically eliminates double taxation.
The credit is limited to the lesser of (a) the tax paid to the other state or (b) the resident state's tax on that same income. If the work state's tax rate is higher than the home state's rate, the home state credit covers only the home state's tax on that income - the excess is not refundable.
An employee lives in New Jersey and works fully remotely for a New York City employer. The employer withholds New York State and NYC taxes under the convenience rule. The employee must file: (1) a New York nonresident return reporting all wages as NY-sourced income, and (2) a New Jersey resident return reporting all income, claiming a credit for taxes paid to New York. The NJ credit substantially offsets the NY tax, but the employee still pays both the NJ filing cost and any difference between NY and NJ rates. NYC wage tax is not creditable by NJ because NYC is a municipality, not a state.
First, determine your employer's state and whether that state has a convenience of employer rule. If your employer is in New York, Delaware, Nebraska, Connecticut, or Pennsylvania, assume the convenience rule applies until verified otherwise.
Second, review withholding. Many employers withhold only for the state where the employee is physically located. If the convenience rule applies and the employer is not withholding for the correct state, the employee may face a large balance due at filing plus underpayment penalties.
Third, review domicile. If you have moved states recently - especially out of New York or California - verify that you have properly established domicile in the new state. Domicile is facts-and-circumstances based. Having a driver's license, voter registration, and spending the majority of your time in the new state are necessary but may not be sufficient if significant ties remain to the old state.