Wisconsin 2025 Regular Session Status: Introduced 1 R cosponsors

SB 859 — Relating to: adopting changes to the federal Internal Revenue Code for state tax purposes and modifying administrative rules related to such changes. (FE)

Last action — Failed to pass pursuant to Senate Joint Resolution 1

  1. 1
    Introduced
  2. 2
    In Committee
  3. 3
    Passed Senate
  4. 4
    Passed Assembly
  5. 5
    To Executive
  6. 6
    Enacted

This bill has been introduced in the Senate. Introduced January 16, 2026. It must pass committee before a floor vote.

Next likely step: a committee referral and hearing.

Prognosis

Stalled 30% · moderate confidence

Where this bill stands today.

Odds of enactment

Low

How often bills like it became law.

  • Introduced

    Current position in the legislative process.

  • 2 sponsors

    1 primary, 1 co-sponsors signed on.

  • Single-party support

    Sponsorship is currently within one party (1 R).

  • Cleared a recorded vote

    Passed 3 recorded votes so far.

Prognosis reads this bill's own signals — stage, sponsorship breadth, committee status, recorded votes and cross-state momentum. Odds come from a model trained on which bills have become law.

Summary

An Act to amend 71.01 (6) (n) 1., 71.07 (5) (a) (intro.), 71.07 (5) (a) 2., 71.07 (5) (a) 3., 71.07 (5) (a) 4., 71.22 (4) (n) 1., 71.22 (4m) (n) 1., 71.26 (2) (b) 15. a., 71.26 (3) (e) 1., 71.34 (1g) (n) 1., 71.34 (1k) (h) 1., 71.42 (2) (n) 1., 71.65 (2) (b), 71.70 (1) and 71.72; to create 71.01 (6) (o), 71.05 (21m), 71.22 (4) (o), 71.22 (4m) (o), 71.26 (2) (a) 13., 71.26 (2) (b) 16., 71.34 (1g) (o), 71.42 (2) (o) and 71.45 (2) (a) 25. of the statutes;

Bill Text

Action History

  1. Failed to pass pursuant to Senate Joint Resolution 1

  2. Report of Joint Survey Committee on Tax Exemptions received, Ayes 8, Noes 1

  3. Report of Joint Survey Committee on Tax Exemptions requested

  4. Available for scheduling

  5. Report passage recommended by Joint Committee on Finance, Ayes 15, Noes 0

  6. Executive action taken

  7. Withdrawn from committee on Senate Organization and rereferred to joint committee on Finance pursuant to Senate Rule 46(2)(c)

  8. Available for scheduling

  9. Report passage recommended by Committee on Agriculture and Revenue, Ayes 8, Noes 0

  10. Executive action taken

  11. Public hearing held

  12. Fiscal estimate received

  13. Read first time and referred to Committee on Agriculture and Revenue

  14. Introduced by Senator Marklein; cosponsored by Representative Wittke

Sponsors

Sponsorship breakdown

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1 sponsors · 1 co-sponsors · 130 not signed on

Sponsors (1)

Co-sponsors (1)

  • Wittke

Not signed on (130)

130 members have not signed on to this bill.

Show all 130 →

"Not signed on" means a member has not sponsored or co-sponsored this bill — it does not imply opposition. Members flagged Voted No have a recorded No vote on this bill.

Whip count is in markup. Polling the chamber and every recorded vote this session. Only the first open is slow. It’s instant for you after this. Calling the roll · Tallying · Engrossing

Votes

Subjects

taxation
Cross-referencing the record. Reading this bill against every other bill in the corpus by meaning, not keywords. Only the first open is slow. It’s instant for you after this. Matching · Ranking · Engrossing

Frequently asked questions

What does SB 859 do?
An Act to amend 71.01 (6) (n) 1., 71.07 (5) (a) (intro.), 71.07 (5) (a) 2., 71.07 (5) (a) 3., 71.07 (5) (a) 4., 71.22 (4) (n) 1., 71.22 (4m) (n) 1., 71.26 (2) (b) 15. a., 71.26 (3) (e) 1., 71.34 (1g) (n) 1., 71.34 (1k) (h) 1., 71.42 (2) (n) 1., 71.65 (2) (b), 71.70 (1) and 71.72; to create 71.01 (6) (o), 71.05 (21m), 71.22 (4) (o), 71.22 (4m) (o), 71.26 (2) (a) 13., 71.26 (2) (b) 16., 71.34 (1g) (o), 71.42 (2) (o) and 71.45 (2) (a) 25. of the statutes;
Who sponsors SB 859?
SB 859 is sponsored by Wittke and Marklein, Howard (Republican).
What is the current status of SB 859?
This bill has been introduced in the Senate. Introduced January 16, 2026. It must pass committee before a floor vote.
Where can I track SB 859?
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