---
type: "Bill"
title: "Relating to: a sales and use tax exemption for nuclear fusion technology projects. (FE)"
description: "Relating to: a sales and use tax exemption for nuclear fusion technology projects. (FE)"
jurisdiction: "us/states/wi"
legislature: "Wisconsin Legislature"
session: "2025"
identifier: "AB 657"
citation: "Wisconsin AB 657 (2025)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Behnke", "Callahan", "Franklin", "Gustafson", "Kreibich", "Melotik", "Murphy", "Mursau", "Neylon", "Udell"]
version_count: 2
action_count: 43
vote_count: 7
first_action: "2025-11-19T06:00:00+00:00"
last_action: "2026-04-02T05:00:00+00:00"
source: "openstates"
source_identifier: "ocd-bill/40cfc2c3-6fb1-48ea-9099-6e287639ec72"
source_url: "https://docs.legis.wisconsin.gov/2025/proposals/reg/asm/bill/ab657"
source_hash: "32f51a030302c73b0be6b31a980104eb3840801d75ab6321fbbc9d0f0c216c2c"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-wi"]
---

# Wisconsin AB 657 (2025) — Relating to: a sales and use tax exemption for nuclear fusion technology projects. (FE)

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Assembly Substitute Amendment 1** (committee substitute) — [source](https://docs.legis.wisconsin.gov/document/amends/2025/REG/AB657-ASA1)
2. **Bill Text** (committee substitute) — [source](https://docs.legis.wisconsin.gov/document/proposaltext/2025/REG/AB657)

## Votes

- Report concurrence recommended by Joint Committee on Finance, Ayes 14, Noes 0 — **14–0** (pass) · upper
- PASSAGE — **92–6** (pass) · lower
- Public hearing requirement waived by committee on Senate Organization, pursuant to Senate Rule 18 (1m), Ayes 3, Noes 2 — **3–2** (pass) · upper
- Report passage as amended recommended by Committee on Ways and Means, Ayes 10, Noes 0 — **10–0** (pass) · lower
- Report of Joint Survey Committee on Tax Exemptions received, Ayes 9, Noes 0 — **9–0** (pass) · lower
- Report Assembly Substitute Amendment 1 adoption recommended by Committee on Ways and Means, Ayes 10, Noes 0 — **10–0** (pass) · lower
- CONCURRENCE — **30–3** (pass) · upper

## Sponsors

- Behnke — primary (person)
- Callahan — primary (person)
- Franklin — primary (person)
- Gustafson — primary (person)
- Kreibich — primary (person)
- Melotik — primary (person)
- Murphy — primary (person)
- Mursau — primary (person)
- Neylon — primary (person)
- Udell — primary (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2025-11-19T06:00:00+00:00** Introduced by Representatives Franklin, Behnke, Callahan, Gustafson, Kreibich, Melotik, Murphy, Mursau, Neylon and Udell; cosponsored by Senator Feyen `introduction`
- **2025-11-19T06:00:00+00:00** Read first time and referred to Committee on Ways and Means `reading-1, referral-committee`
- **2025-11-21T06:00:00+00:00** Representative Subeck added as a coauthor
- **2025-12-04T06:00:00+00:00** Fiscal estimate received `receipt`
- **2025-12-08T06:00:00+00:00** Fiscal estimate received `receipt`
- **2025-12-17T06:00:00+00:00** Representative Armstrong added as a coauthor
- **2026-01-08T06:00:00+00:00** Public hearing held
- **2026-01-12T06:00:00+00:00** Assembly Amendment 1 offered by Representative Franklin
- **2026-01-29T06:00:00+00:00** Assembly Substitute Amendment 1 offered by Representative Franklin
- **2026-02-04T06:00:00+00:00** Executive action taken
- **2026-02-04T06:00:00+00:00** Report Assembly Substitute Amendment 1 adoption recommended by Committee on Ways and Means, Ayes 10, Noes 0 `committee-passage-favorable`
- **2026-02-04T06:00:00+00:00** Report passage as amended recommended by Committee on Ways and Means, Ayes 10, Noes 0 `committee-passage-favorable`
- **2026-02-04T06:00:00+00:00** Referred to committee on Rules `referral-committee`
- **2026-02-06T06:00:00+00:00** Referred to joint survey committee on Tax Exemptions pursuant to Assembly Rule 45 (4) `referral-committee`
- **2026-02-06T06:00:00+00:00** Senator Spreitzer added as a cosponsor
- **2026-02-09T06:00:00+00:00** Executive action taken by joint survey committee on Tax Exemptions
- **2026-02-10T06:00:00+00:00** Report of Joint Survey Committee on Tax Exemptions received, Ayes 9, Noes 0 `receipt`
- **2026-02-10T06:00:00+00:00** Placed on calendar 2-12-2026 by Committee on Rules
- **2026-02-12T06:00:00+00:00** Read a second time `reading-2`
- **2026-02-12T06:00:00+00:00** Assembly Substitute Amendment 1 adopted `amendment-passage`
- **2026-02-12T06:00:00+00:00** Ordered to a third reading `reading-3`
- **2026-02-12T06:00:00+00:00** Rules suspended
- **2026-02-12T06:00:00+00:00** Read a third time and passed, Ayes 92, Noes 6 `passage, reading-3`
- **2026-02-12T06:00:00+00:00** Ordered immediately messaged
- **2026-02-13T06:00:00+00:00** Received from Assembly `receipt`
- **2026-02-13T06:00:00+00:00** Read first time and referred to joint committee on Finance
- **2026-02-16T06:00:00+00:00** Executive action taken
- **2026-02-16T06:00:00+00:00** Report concurrence recommended by Joint Committee on Finance, Ayes 14, Noes 0 `committee-passage-favorable`
- **2026-02-16T06:00:00+00:00** Available for scheduling
- **2026-03-16T05:00:00+00:00** Public hearing requirement waived by committee on Senate Organization, pursuant to Senate Rule 18 (1m), Ayes 3, Noes 2
- **2026-03-16T05:00:00+00:00** Placed on calendar 3-17-2026 pursuant to Senate Rule 18(1)
- **2026-03-17T05:00:00+00:00** Senators Ratcliff and Smith added as cosponsors
- **2026-03-17T05:00:00+00:00** Read a second time `reading-2`
- **2026-03-17T05:00:00+00:00** Ordered to a third reading `reading-3`
- **2026-03-17T05:00:00+00:00** Rules suspended to give bill its third reading
- **2026-03-17T05:00:00+00:00** Read a third time and concurred in, Ayes 30, Noes 3 `passage, reading-3`
- **2026-03-17T05:00:00+00:00** Ordered immediately messaged
- **2026-03-18T05:00:00+00:00** Received from Senate concurred in `receipt`
- **2026-03-18T05:00:00+00:00** Representative Steffen added as a coauthor
- **2026-03-23T05:00:00+00:00** Report correctly enrolled on 3-23-2026 `enrolled`
- **2026-04-01T05:00:00+00:00** Presented to the Governor on 4-1-2026 `executive-receipt`
- **2026-04-02T05:00:00+00:00** Report approved by the Governor on 4-2-2026. 2025 Wisconsin Act 165 `executive-signature`
- **2026-04-02T05:00:00+00:00** Published 4-3-2026 `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/40cfc2c3-6fb1-48ea-9099-6e287639ec72`. Confidence: reported (aggregated from official Wisconsin legislature records).