Calculate state income tax allocation for remote workers and multi-state earners. Includes reciprocity agreements and tax credits.
| State | Days | Income | Tax | Credit | Net |
|---|---|---|---|---|---|
| NY | 180 | $67,500 | $4,624 | — | $4,624 |
| NJ | 100 | $37,500 | $3,364 | — | $3,364 |
| CT | 40 | $15,000 | $1,049 | — | $1,049 |
State tax allocation is based on days-worked methodology. Reciprocity agreements and tax credits are simplified. Some states use income-sourcing rules instead of days. This is for estimation only — consult a tax professional.
About this tool
Calculate state income tax when working across multiple states. Days-worked allocation, reciprocity agreements, and tax credits. Free multi-state tax calculator — no signup.
What Is Multi-State Tax Allocation?
When you work in multiple states during a tax year, each state can tax the income earned within its borders. The most common method is days-worked allocation: your total income is split based on the percentage of work days spent in each state. For example, if you worked 180 days in New York and 100 days in New Jersey out of 280 total days, New York taxes 64.3% of your income and New Jersey taxes 35.7%.
What Are State Tax Reciprocity Agreements?
Some states have reciprocity agreements that allow residents of one state to work in another without paying tax to the non-resident state. For example, if you live in New Jersey but work in Pennsylvania, the NJ-PA reciprocity agreement means you only pay tax to New Jersey. This tool automatically checks reciprocity agreements between your home state and work states.
How Do Tax Credits Work for Multi-State Earners?
If your home state does not have reciprocity with a state where you worked, you may face double taxation. Most states offer a tax credit for income taxes paid to other states. The credit is typically the lesser of: (a) the tax you paid to the non-resident state, or (b) the tax your home state would charge on that same income. This prevents double taxation but requires careful calculation.
Frequently asked
How is income allocated across multiple states?
The most common method is days-worked allocation. Count total work days in all states, then divide each state's work days by the total. That percentage of your annual income is allocated to that state. For example, 180 days in NY out of 280 total = 64.3% of income allocated to New York.
What states have reciprocity agreements?
About 16 states have reciprocity agreements, mostly in the Midwest and Mid-Atlantic. Key pairs include: NJ-PA, MD-DC-VA-WV, OH-IN-KY-MI-PA-WV, IL-IA-KY-MI-WI, and MN-MI-ND. If your home state has reciprocity with your work state, you only pay tax to your home state.
Do I pay double tax if there's no reciprocity?
Not necessarily. Most states that charge income tax offer a credit for taxes paid to other states. The credit is usually the lesser of the tax paid to the other state or what your home state would charge on that income. States without income tax (TX, FL, WA, NV, etc.) do not offer credits because they don't charge income tax.
What if I work remotely from home for an out-of-state employer?
Generally, you are taxed where you physically perform the work, not where your employer is located. If you work from home in New York for a California company, only New York taxes your income (under the convenience-of-the-employer rule, with some exceptions for Delaware, Nebraska, New York, and Pennsylvania).
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