What actually happens
An employee who lives in North Carolina and performs work in New York sits in two tax systems at once. The residence state claims the right to tax all of a resident's income wherever earned; the work state claims the right to tax income sourced within its borders. Absent an agreement, both claims stand, and the conflict is resolved after the fact through a credit on the resident return rather than up front in payroll.
When New York withholding starts
New York applies a de minimis test of 14 working days before nonresident withholding begins. Per TSB-M-12(5)I, an employer is not penalized for failing to withhold New York tax on a nonresident employee if: the employee's primary work location is outside New York, the employer reasonably expects the employee to work 14 days or fewer in New York during the calendar year, and the employee in fact works 14 days or fewer. ANY part of a day worked in New York counts as a full day (job-related training days do not count). The rule does NOT apply to traveling salespersons paid on volume, deferred compensation, or nonresident public speakers/athletes/entertainers. SEPARATELY, New York applies the strictest CONVENIENCE-OF-THE-EMPLOYER rule in the country: a nonresident's remote workdays are sourced to New York unless the employee works from a bona fide employer office outside New York (a demanding multi-factor test).
The trap is that thresholds are usually retroactive to the first day once crossed. An employee who spends 40 days in a 30-day-threshold state does not owe tax on 10 days; they owe it on all 40, and the employer is the one who failed to withhold.
New York's convenience rule changes the answer for remote workers
New York applies a convenience-of-the-employer test. If the employee is on a New York payroll but works from North Carolina because they prefer to, New York treats those days as New York-source income even though no work was physically performed there. Only genuine employer necessity moves the sourcing. How the test is applied.
Unemployment insurance goes to one state only
Income tax can be split between states. Unemployment insurance cannot. Under the localization test used by every state, an employee whose services are performed entirely in New York is covered by New York for unemployment purposes, and all wages are reported there — regardless of where they live, where you are headquartered, or which state's income tax you withhold. New York's 2026 taxable wage base is $17,600. The four-factor test in order.
Local taxes are a separate problem
New York: New York City imposes a resident personal income tax and Yonkers imposes a resident income tax surcharge plus a nonresident earnings tax -- all withheld through payroll (see Form IT-2104.1 for nonresident allocation). The Metropolitan Commuter Transportation Mobility Tax (MCTMT) is an employer-paid tax on payroll in the MTA region, not withheld from employees.
What you have to register for
| Obligation | State | Agency |
|---|---|---|
| Income tax withholding | New York | New York State Department of Taxation and Finance |
| Unemployment insurance | New York | New York State Department of Labor |
| Paid family & medical leave | New York | New York Paid Family Leave is 100% employee-funded at 0.432% of gross wages for 2026, capped at $411.91 per employee per year (NYSAWW $1,833.63). Separately, NY Disability Benefits Law (DBL) allows employee withholding of 0.50% of wages up to $0.60 per week. |
Frequently asked
Do New York and North Carolina have a reciprocal tax agreement?
No. There is no reciprocal agreement between New York and North Carolina. New York taxes wages earned in the state by nonresidents, and North Carolina taxes the same wages as resident income while allowing a credit for tax paid to New York.
Which state's income tax should be withheld?
New York, as the state where the work is performed. North Carolina also taxes the income as a resident, but the employee claims a credit on the North Carolina return for tax paid to New York.
Which state gets the unemployment insurance wages?
New York. Unemployment coverage is never split between states for a single job. The localization test assigns the whole job to the state where services are performed, which here is New York, regardless of residence or where the employer is headquartered.
How many days can an employee work in New York before withholding starts?
New York applies a de minimis test of 14 working days. Once the limit is crossed, most states require withholding on all in-state wages for the year, not just the excess.
Does New York's convenience-of-the-employer rule apply to a remote employee in North Carolina?
It can. If the employee is assigned to a New York office but works from North Carolina for their own convenience, New York sources those days to New York anyway. The rule is displaced only where the remote arrangement is a genuine necessity of the employer, which is a facts-and-circumstances test you should document contemporaneously.