S. 1443 (119th)Bill Overview

Mobile Workforce State Income Tax Simplification Act of 2025

Taxation|Taxation
Cosponsors
Support
Bipartisan
Introduced
Apr 10, 2025
Discussions
Bill Text
Current stageCommittee

Read twice and referred to the Committee on Finance.

Introduced
Committee
Floor
President
Law
Congressional Activities
01 · The brief
Plain-English summaryWhat this bill actually does

The bill restricts States from taxing wages of employees who work in multiple States so that only the employee’s resident State and any State where the employee performs duties more than 30 days in a calendar year may tax that income. Employers need not withhold for a State unless the employee meets that test; employers may rely on an employee’s annual estimate of time spent in each State unless the employer uses a contemporaneous time-and-attendance system.

Why people may split

Left emphasizes state revenue and progressive fairness concerns

Watch point

Relative to its intended legislative type, this bill is a clearly targeted substantive policy change that sets a definitive rule limiting State income tax reach for multi-State employees.

The bill restricts States from taxing wages of employees who work in multiple States so that only the employee’s resident State and any State where the employee performs duties more than 30 days in a calendar year may tax that income.

Employers need not withhold for a State unless the employee meets that test; employers may rely on an employee’s annual estimate of time spent in each State unless the employer uses a contemporaneous time-and-attendance system.

The bill excludes professional athletes, entertainers, certain production workers, and some public figures, and becomes effective January 1 of the second year after enactment.

Passage40/100

Technically focused and administrable but high federalism sensitivity and fiscal effects lower probability absent strong bipartisan coalition.

CredibilityPartially aligned

Relative to its intended legislative type, this bill is a clearly targeted substantive policy change that sets a definitive rule limiting State income tax reach for multi-State employees. It includes detailed definitions and several operational rules (withholding applicability, employer reliance, time-and-attendance override) that make the statute reasonably actionable.

Contention66/100

Left emphasizes state revenue and progressive fairness concerns

02 · What it does

Who stands to gain, and who may push back.

Likely benefits vs burdens50% / 50%
Employers · WorkersStates

These are examples from the analysis, not a ranked list of the most-affected groups.

Likely helped
  • EmployersReduces employer payroll complexity and compliance costs for multi-state employees.
  • WorkersAllows many mobile workers to avoid multiple state income tax filings and withholding.
  • EmployersProvides a clear safe harbor for employers who rely on employee time estimates.
Likely burdened
  • StatesReduces State income tax revenue where nonresidents currently pay tax for short work periods.
  • Potential burdenCreates incentives to structure work to stay beneath the 31‑day threshold to avoid tax.
  • StatesMay produce enforcement and auditing challenges for States seeking to verify employee location.
03 · Why people split

Why the argument around this bill splits.

Left emphasizes state revenue and progressive fairness concerns
Progressive30%

Likely skeptical.

Views the bill as a federal preemption that could shrink state tax bases and undercut progressive state revenue.

Appreciates compliance simplification but sees likely harms to public services and tax fairness, though exact impacts are uncertain.

Likely resistant
Centrist60%

Cautiously supportive of simplified rules but concerned about state budget impacts and gaming of employee estimates.

Would favor safeguards, a transition plan, and data collection to measure fiscal effects.

Split reaction
Conservative85%

Generally favorable.

Sees the bill as reducing state overreach, lowering compliance costs, and encouraging worker mobility and economic efficiency.

Few ideological objections absent federal fiscal costs or hidden mandates.

Leans supportive
04 · Can it pass?

The path through Congress.

Introduced

Reached or meaningfully advanced

Committee

Reached or meaningfully advanced

Floor

Still ahead

President

Still ahead

Law

Still ahead

Passage likelihood40/100

Technically focused and administrable but high federalism sensitivity and fiscal effects lower probability absent strong bipartisan coalition.

Scope and complexity
52%
Scopemoderate
24%
Complexitylow
Why this could stall
  • No federal cost or State revenue estimates provided
  • Level of organized state government opposition
05 · Recent votes

Recent votes on the bill.

No vote history yet

The bill has not accumulated any surfaced votes yet.

06 · Go deeper

Go deeper than the headline read.

Included on this page

Left emphasizes state revenue and progressive fairness concerns

Technically focused and administrable but high federalism sensitivity and fiscal effects lower probability absent strong bipartisan coaliti…

Unlocked analysis

Relative to its intended legislative type, this bill is a clearly targeted substantive policy change that sets a definitive rule limiting State income tax reach for multi-State employees. It includes detailed definition…

Go beyond the headline summary with full stakeholder mapping, legislative design analysis, passage barriers, and lens-by-lens tradeoff breakdowns.

Perspective breakdownsPassage barriersLegislative design reviewStakeholder impact map
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