S. 549 (119th)Bill Overview

Maritime Fuel Tax Parity Act

Taxation|Taxation
Cosponsors
Support
Lean Republican
Introduced
Feb 12, 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

Amends section 4041(g) of the Internal Revenue Code to extend the existing excise-tax exemption for alternative motorboat fuels sold as supplies for vessels or aircraft so that it also applies to fuels used by vessels described in section 4042(c)(1) that are engaged in trade between Atlantic or Pacific U.S. ports (including territories). The amendment applies to fuel sold for use or used after December 31, 2025.

Why people may split

Liberals want environmental standards and transparency attached.

Watch point

Simple, technical tax fix with likely industry support and low controversy; may move easily if prioritized or attached to larger legislation.

Amends section 4041(g) of the Internal Revenue Code to extend the existing excise-tax exemption for alternative motorboat fuels sold as supplies for vessels or aircraft so that it also applies to fuels used by vessels described in section 4042(c)(1) that are engaged in trade between Atlantic or Pacific U.S. ports (including territories).

The amendment applies to fuel sold for use or used after December 31, 2025.

Passage40/100

Narrow, low-controversy tax tweak with modest fiscal cost increases prospects, but requires committee action or packaging into broader tax legislation.

CredibilityPartial

How solid the drafting looks.

Contention32/100

Liberals want environmental standards and transparency attached.

02 · What it does

Who stands to gain, and who may push back.

Likely benefits vs burdens50% / 50%
Likely helpedFederal agencies

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

Likely helped
  • Potential benefitReduces per-gallon taxes for qualifying coastal vessels using alternative fuels, lowering operating fuel expenses.
  • Potential benefitImproves tax parity for vessels serving a single coast relative to other maritime operators.
  • Potential benefitEncourages adoption of alternative marine fuels by improving their cost competitiveness.
Likely burdened
  • Federal agenciesReduces federal excise tax receipts to the extent qualifying vessels purchase eligible alternative fuels.
  • Potential burdenCreates a targeted tax benefit that may advantage coastwise operators over other transport modes.
  • Potential burdenPotentially subsidizes fuels whose lifecycle emissions may not be lower, limiting environmental gains.
03 · Why people split

Why the argument around this bill splits.

Liberals want environmental standards and transparency attached.
Progressive65%

Likely sees the bill as a targeted incentive to encourage alternative marine fuels, potentially reducing maritime emissions.

Concern remains that it is a tax subsidy for industry without explicit environmental performance requirements or equity guardrails.

Split reaction
Centrist75%

Views the bill as a narrow, technical correction to extend an existing tax exemption to additional coastal trade vessels.

Generally supportive if costs are small and oversight prevents abuse.

Leans supportive
Conservative60%

May be cautiously supportive if it reduces regulatory friction for maritime commerce and energy choice, but wary that it's a tax exemption expanding government favoritism toward certain industries.

Split reaction
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

Narrow, low-controversy tax tweak with modest fiscal cost increases prospects, but requires committee action or packaging into broader tax legislation.

Scope and complexity
24%
Scopenarrow
24%
Complexitylow
Why this could stall
  • Magnitude of expected revenue loss is unspecified
  • Exactly how many vessels qualify under 4042(c)(1)
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

Liberals want environmental standards and transparency attached.

Narrow, low-controversy tax tweak with modest fiscal cost increases prospects, but requires committee action or packaging into broader tax…

Unlocked analysis

Pro readers get the full perspective split, passage barriers, legislative design review, stakeholder impact map, and lens-based policy tradeoff analysis for Maritime Fuel Tax Parity Act.

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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