Mobile Workforce State Income Tax Simplification Act of 2026
- Sponsor
- Rep. Goldman, Craig A. [R-TX-12]
- Committees
- Judiciary Committee (primary)
- Last action
- Sep 3, 2026
Bottom line
This bill aims to simplify state income tax compliance for employees and employers with mobile workforces by establishing a uniform 30-day threshold for nonresident state taxation and associated withholding.
What it actually does
This bill establishes a federal standard for when states can tax the income of employees who work in multiple states. It limits a state's authority to tax nonresident employees to only their state of residence and any nonresident state where they perform employment duties for more than 30 days in a calendar year. It also aligns state income tax withholding requirements with this 30-day tax liability threshold, providing operating rules for employer reliance on employee determinations.
Proponents argue
Proponents argue that the current patchwork of state income tax laws for mobile employees creates an excessive administrative burden and significant compliance costs for businesses and individuals. This bill would simplify tax filing, reduce instances of double taxation, and foster interstate commerce by providing a clear, uniform standard for when nonresident income is taxable.
Opponents contend
Opponents contend that this bill infringes on states' sovereign rights to determine their own tax policies and could lead to substantial revenue losses for states that currently tax income from shorter work periods. They also raise concerns about the administrative challenges of tracking the 30-day threshold and the potential for tax avoidance.
The bill is concise, allowing for a quick read, but its implications for state tax policy and mobile workforces warrant careful consideration beyond a superficial review.
Section 2(a)
Limitation on Nonresident State Income Taxation
This provision establishes that an employee's wages are only subject to income tax in their state of residence and in any nonresident state where they perform employment duties for more than 30 days in a calendar year. This creates a uniform national standard for when states can tax income of employees working across state lines, overriding existing state-specific rules.
Supporters argue
Supporters argue this simplifies tax compliance for individuals and businesses, reducing the administrative burden and costs associated with tracking and filing in multiple states for short-term work. It also prevents situations where employees might owe taxes to several states for minimal work presence, promoting a fairer tax system.
Critics contend
Critics may argue that this provision infringes on states' sovereign rights to determine their own tax policies and could lead to significant revenue losses for states that currently tax income from shorter work periods, particularly those bordering major metropolitan areas or with high tourism/event-based economies.
Tradeoffs
This provision balances the desire for tax simplification and reduced compliance costs for businesses and individuals against states' rights to tax economic activity within their borders and the potential for state revenue impacts.
Section 2(b)
Alignment of Withholding with Tax Liability
This section mandates that state income tax withholding and reporting requirements only apply if the employee is subject to income tax in that state under the 30-day rule established in subsection (a). Once the 30-day threshold is met, withholding applies retroactively to all wages earned in that state from the commencement date of employment duties during that calendar year.
Section 2(c)
Employer Safe Harbor for Withholding Penalties
This provision establishes operating rules for employers regarding penalties related to state income tax withholding. It allows employers to rely on an employee's annual determination of the time expected to be spent in various states without penalty, unless the employer has actual knowledge of employee fraud or collusion to evade tax. This reliance is generally permitted even if the employer maintains other location records, unless the employer, at its sole discretion, maintains a daily time and attendance system that tracks work location.
Section 2(d)(2)-(6)
Exclusions for Specific Professions
The bill explicitly excludes professional athletes, professional entertainers, qualified production employees, and certain public figures from the definition of 'employee' for the purposes of this Act. This means the 30-day rule does not apply to their income, and existing state tax rules for these professions, which often involve specific 'jock taxes' or event-based taxation, would continue to apply without change.
Defines a 'day' for the purpose of the 30-day threshold. Generally, an employee is considered present and performing employment duties within a State for a day if they perform more duties there than in any other State during that day. However, if an employee performs duties in a resident State and in only one nonresident State during one day, that employee is considered to have performed more of their duties in the nonresident State for that day. Transit time is explicitly excluded from this calculation.
Section 2(d)(1)
Why it matters:It is standard legislative practice to define terms within a dedicated section. However, the specific rule for resident vs. single nonresident state interaction is a critical operational detail that clarifies ambiguous scenarios and is essential for accurate application of the 30-day threshold.
Case for: Proponents would argue this definition provides necessary clarity and prevents ambiguity in counting days, especially for employees who split time between their home state and a single neighboring state. It ensures that even minimal work in the nonresident state counts towards the threshold in that specific, common scenario, preventing unintended loopholes.
Case against: Critics might argue that the specific rule for resident/nonresident states is overly complex and could lead to situations where very minimal work in a nonresident state triggers a 'day' count, potentially complicating tracking for employers and employees beyond the intended simplification.
Estimated impact: Directly impacts how the 30-day threshold is calculated, potentially increasing the number of 'days' counted for nonresident states in specific scenarios, thus expanding the reach of nonresident state taxation compared to a strict 'more than any other state' rule. This could lead to more employees meeting the 30-day threshold.
Defines a 'time and attendance system' as a system in which an employee is required on a contemporaneous basis to record their work location for every day worked outside of their primary state, and the system is designed to allow the employer to allocate the employee's wages for income tax purposes among all states. This definition is critical because, under Section 2(c)(3), if an employer maintains such a system, its data must be used instead of the employee's determination for penalty purposes.
Section 2(d)(9)
Why it matters:It is a technical definition crucial for understanding the scope and limitations of the employer safe harbor provisions. Its placement is standard for defining terms, but its operational impact is easily missed without careful reading of the entire section.
Case for: Proponents would argue this definition clarifies when an employer cannot rely on employee estimates, ensuring that if an employer has a robust, daily tracking system, that accurate data is used for tax purposes. This promotes fairness and accuracy in tax collection, preventing employers from deliberately ignoring their own precise data.
Case against: Critics might argue that this provision could inadvertently disincentivize employers from implementing sophisticated tracking systems if doing so removes their safe harbor for relying on employee estimates, potentially leading to less accurate data overall from employers who choose not to implement such systems.
Estimated impact: Affects employer liability for penalties and the accuracy of tax withholding for employees whose employers use advanced tracking systems. It creates a higher standard for employers who invest in such systems, potentially increasing their administrative burden if their system is not fully integrated with tax allocation.