The Double-Tax Problem
NJ residents working in NY face a double state income tax situation. NY taxes income sourced to NY. NJ taxes all worldwide income. You get a credit on your NJ return for taxes paid to NY — but the credit is limited to NJ's rate on that income.
If NY's rate exceeds NJ's rate (likely at higher incomes), the excess NY tax is not refundable by NJ. Net effect: you pay the higher of the two states' rates on your NY-sourced income.
NY's Convenience of the Employer Doctrine
This is the rule that catches most remote workers off guard.
Rule (NY Tax Law §631(b)(2)): If your NY employer has a NY office available to you and you choose to work from NJ some days, NY claims tax on all your work days — including the days you work from home in NJ.
Remote work from NJ for a NY employer triggers NY tax on those days unless working from home is for the employer's necessity (not employee convenience).
Key case: Zelinsky v. Tax Appeals Tribunal (1 N.Y.3d 85, 2003) — NY Court of Appeals upheld the doctrine.
Post-COVID status: NY maintains its aggressive position. NJ has challenged it but no binding decision has reversed it. Assume NY taxes all days unless the employer has no NY office or remote work is at the employer's direction.
Self-Employed: Multi-State Income Sourcing
Self-employed NJ residents with NY clients must allocate income based on where services are actually performed:
- Work done in NJ = NJ income
- Work done in NY = NY income
Keep detailed records of work location. This is distinct from the convenience rule, which applies to employees.
Combined Marginal Rates
For NJ residents with NY income, combined federal + state marginal rates can be substantial:
| Income Range | Federal | NY State | Combined |
|---|---|---|---|
| $80,000 – $215,000 | 22-32% | 6.0-6.85% | ~28-39% |
| $215,000 – $1,077,000 | 32-35% | 6.85% | ~39-42% |
| Over $1,077,000 | 37% | 9.65%+ | ~47%+ |
NYC residents add another 3.078-3.876%, pushing combined rates above 50% at the top.
Frequently Asked Questions
Do I have to pay both NJ and NY income tax?
If you're a NJ resident working in NY, you pay NY tax on NY-sourced income and NJ tax on all income. NJ provides a credit for taxes paid to NY (Form NJ-COJ), but the credit is limited to NJ's rate. You effectively pay the higher of the two states' rates on NY income.
What is the convenience of the employer rule?
Under NY Tax Law §631(b)(2), if your NY employer has an office in NY available to you and you choose to work remotely from NJ, NY claims tax on ALL your work days — including remote/NJ days. Working from home only avoids NY tax if it's at the employer's necessity, not your convenience.
Does remote work from NJ for a NY employer avoid NY tax?
Generally no. Under NY's convenience of the employer doctrine, if your employer has a NY office available to you, NY taxes your income even on days worked from home in NJ. NY has maintained this position aggressively post-COVID. NJ has challenged it but no binding reversal exists.
How is income allocated between NJ and NY for self-employed?
Self-employed individuals allocate income based on where services are physically performed. Work done in NJ = NJ income; work done in NY = NY income. Keep detailed records of work location. The convenience rule applies to employees, not the self-employed.