Mobile Workforce State Income Tax Simplification Act of 2026

The Mobile Workforce State Income Tax Simplification Act of 2026 restricts state income tax collection on employees who work in multiple states, limiting taxation to only the employee's home state and any other state where they perform duties for more than 30 days in a calendar year. This change directly affects multi-state workers and their employers by eliminating withholding and reporting requirements for wages earned in states where the employee does not meet the 30-day threshold. Employers are permitted to rely on employees' annual estimates of work location for tax purposes, unless the employer maintains a daily time and attendance tracking system or has actual knowledge of fraud. The bill excludes specific groups, such as professional athletes, entertainers, film production staff, and public figures, from these simplified rules, and it takes effect on January 1 of the second calendar year following its enactment.