PlainBillCongress, translated.Legislation. Context. Public interest.Read twice and referred to the Committee on Finance.
Congressional Research Service
Version 00 · Introduced in Senate · Feb 28, 2019
Mobile Workforce State Income Tax Simplification Act of 2019
This bill prohibits the wages or other remuneration earned by an employee who performs employment duties in more than one state from being subject to income tax in any state other than (1) the state of the employee's residence, and (2) the state within which the employee is present and performing employment duties for more than 30 days during the calendar year.
The bill exempts employers from state income tax withholding and information reporting requirements for employees not subject to income tax in the state under this bill. For the purposes of determining penalties related to an employer's state income tax withholding or reporting requirements, an employer may rely on an employee's annual determination of the time expected to be spent working in a state in the absence of fraud or collusion by such employee.
Showing the opening paragraphs of the official summary.
For the purposes of this bill, the term "employee" excludes professional athletes; professional entertainers; production employees who perform services in connection with certain film, television, or other commercial video productions; and public figures who are persons of prominence who perform services for wages or other remuneration on a per-event basis.
People & committees
Sen. Thune, John [R-SD] · R–SD
Legislative record
A procedural vote is different from passage. Passage in one chamber does not establish enactment. Explore the glossary.
Read twice and referred to the Committee on Finance.
Introduced in Senate
Primary sources
Text links open the official source. We currently store references to these documents.
Source last updated: Dec 5, 2025. Consult Congress.gov for the current record.
AI Conversation Starters
Choose a perspective, copy a prompt, and paste it into your preferred AI. Each prompt includes the bill version and available official source links, and asks for counterarguments as well as supporting evidence.
Analyze S.604 as objectively as possible. Explain its main provisions, who would be affected, possible benefits and harms, implementation, exceptions, and uncertainties. Present the strongest arguments for and against it, and identify evidence needed to assess its public impact.
Examine S.604 through a progressive lens, focusing on fairness, access, economic inequality, and effects on vulnerable communities. Explain potential benefits, costs, and unintended consequences. Consider the strongest counterarguments and distinguish stated goals from demonstrated outcomes.
Examine S.604 through a conservative lens, focusing on fiscal responsibility, institutional stability, federalism, and the scope of government. Explain potential benefits, costs, and unintended consequences. Consider the strongest counterarguments and any provisions that challenge this perspective.
Examine S.604 through a civil-liberties and limited-government lens. Consider individual rights, privacy, voluntary choice, accountability, and government power. Explain tradeoffs, possible safeguards, and the strongest counterarguments without assuming the proposal is beneficial or harmful.