STATE TAXES

State Residency and Income Tax Rules Explained

How to determine your state tax residency and avoid unexpected state income tax obligations.

May 20, 2026Tax Researcher8 min read

What Defines State Residency?

Each state has rules for residency, often based on days spent in the state, permanent home, and where you work. These rules determine which state can tax your income.

Avoiding Dual Residency Issues

If you split time between two states, you may owe tax to both. Understand the rules and use residency breaks or domicile changes to manage your obligations.

Part-Year Residency Filing

If you move during the year, you may file as a part-year resident in both states. This requires careful allocation of income to the time spent in each state.

Special Rules for Remote Workers

Remote work has created new state tax questions. Some states tax nonresidents who work remotely for companies located there, so know the latest guidance.

Tools for State Tax Comparison

Our site can help you compare residency scenarios and estimate net pay after the correct state taxes are applied.