AB 657 Wisconsin Assembly · 2025-2026 Regular Session

Relating to: a sales and use tax exemption for nuclear fusion technology projects. (FE)

AB 657 exempts sales and use taxes for specific equipment and materials used exclusively in qualified nuclear fusion technology projects. It covers over 70 listed items, including plasma heating systems, superconductors, diagnostic tools, specialized materials like lithium and tungsten, and safety equipment. The exemption applies to businesses conducting fusion projects focused on energy generation, medical isotope production, research, or other fusion-related applications as defined in the bill. This policy directly reduces costs for companies developing nuclear fusion technology by eliminating taxes on qualifying purchases.
Bill status signed all 5 stages cleared
Introduction
Nov 2025
Committee Review
Mar 2026
Assembly Passage
Feb 2026
Senate Passage
Mar 2026
Signed into Law
Apr 2026
Introduced Nov 19, 2025 Signed Apr 2, 2026
Floor votes · Senate Mar 17, 2026 · Assembly Feb 12, 2026

How they voted

303
Passed
Total votes 33
Mar 17, 2026
D Democratic15
12 Yea 3 Nay
80% Yea
R Republican18
18 Yea
100% Yea
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
43
Key actions
10
Committee
8
Amendments
3
Apr 2, 2026
Signed into law
Report approved by the Governor on 4-2-2026. 2025 Wisconsin Act 165
lower
Mar 17, 2026
Upper · Passed
Read a third time and concurred in, Ayes 30, Noes 3
upper
Mar 16, 2026
Upper · Passed
Public hearing requirement waived by committee on Senate Organization, pursuant to Senate Rule 18 (1m), Ayes 3, Noes 2
upper
Feb 16, 2026
Upper · Passed
Report concurrence recommended by Joint Committee on Finance, Ayes 14, Noes 0
upper
Feb 12, 2026
Lower · Passed
Read a third time and passed, Ayes 92, Noes 6
lower
Feb 12, 2026
Lower · Passed
Assembly Substitute Amendment 1 adopted
lower
Feb 10, 2026
Lower · Passed
Placed on calendar 2-12-2026 by Committee on Rules
lower
Feb 9, 2026
Lower · Passed
Executive action taken by joint survey committee on Tax Exemptions
lower
Feb 6, 2026
Committee
Referred to joint survey committee on Tax Exemptions pursuant to Assembly Rule 45 (4)
lower
Feb 4, 2026
Committee
Referred to committee on Rules
lower
Feb 4, 2026
Lower · Passed
Report passage as amended recommended by Committee on Ways and Means, Ayes 10, Noes 0
lower
Feb 4, 2026
Lower · Passed
Report Assembly Substitute Amendment 1 adoption recommended by Committee on Ways and Means, Ayes 10, Noes 0
lower
Jan 29, 2026
Introduced
Assembly Substitute Amendment 1 offered by Representative Franklin
lower
Jan 12, 2026
Introduced
Assembly Amendment 1 offered by Representative Franklin
lower
Nov 19, 2025
Introduced
Introduced by Representatives Franklin, Behnke, Callahan, Gustafson, Kreibich, Melotik, Murphy, Mursau, Neylon and Udell; cosponsored by Senator Feyen
lower
10 primary · 0 co-sponsors

Sponsors