Multi-State Worker Tax Fairness Act of 2026

This bill restricts states from taxing the income of individuals who live in one state but work remotely for employers located elsewhere. It establishes that a state can only tax an individual's compensation if they are physically present within that state during the time the work is performed, preventing taxation based on where the employer is headquartered. The legislation specifically prohibits states from using "convenience of the employer" tests to claim taxing rights over workers who are physically located in another jurisdiction. These rules apply immediately upon enactment and affect nonresident employees and independent contractors, while leaving corporate taxes and unearned income regulations unchanged.