SB 581 Michigan Senate · 2025-2026 Regular Session

Economic development: downtown development authorities; definition of downtown district; modify. Amends sec. 201 of 2018 PA 57 (MCL 125.4201). TIE BAR WITH: HB 5455'26

SB 581 updates definitions in Michigan's downtown development law to clarify how tax increment financing (TIF) programs operate. It specifically revises the definition of "downtown district" to allow multiple geographic areas within a business district under certain conditions (like inter-municipal agreements), defines "captured assessed value" for TIF calculations, and limits "catalyst development projects" to one per authority (requiring $300 million+ investment in cities over 600,000 population). These changes directly affect municipalities operating downtown development authorities that use TIF to fund redevelopment. The bill focuses on precise terminology to ensure consistent application of existing TIF rules, without creating new funding mechanisms.
Bill status signed all 5 stages cleared
Introduction
Sep 2025
Committee Review
Mar 2026
Senate Passage
Mar 2026
House Passage
Mar 2026
Signed into Law
Apr 2026
Introduced Sep 22, 2025 Signed Apr 14, 2026
Maddy AI version diff · 4 comparisons

What changed between versions

Substitute (H-1) - 3 Senate Concurred Bill · 3 edits
MINOR
The bill was renumbered from a House substitute to a Senate concurred version, indicating it has passed both chambers. The substantive text contains numerous formatting errors and contradictory language (e.g., 'prior to before', 'shall must be', 'is not be') that likely require correction before becoming law. No clear new policy, funding amounts, or eligibility criteria were successfully added in this version.
TECHNICAL

The document header changed from 'HOUSE SUBSTITUTE' to 'Senate BILL', reflecting its status as a final version passed by the Senate.

The text contains severe grammatical and legal drafting errors, such as 'prior to before' and 'shall must be', which create ambiguity and likely need to be fixed in the final enacted law.

Page number headers and tracking codes from the House version were removed in the Senate version.

Floor votes · Senate Mar 11, 2026 · House Mar 19, 2026

How they voted

2214
Passed · 2 other
Total votes 38
Mar 11, 2026
D Democratic19
18 Yea 1
94% Yea
R Republican19
4 Yea 14 Nay 1
73% Nay
Vote distribution
All Yea All Nay Mixed No data
Full legislative history

Actions timeline

Total actions
32
Key actions
9
Committee
6
Apr 14, 2026
Introduced
FILED WITH SECRETARY OF STATE 3/26/2026 11:37 AM
upper
Apr 14, 2026
Signed into law
APPROVED BY GOVERNOR 3/26/2026 9:30 AM
upper
Mar 24, 2026
Upper · Passed
HOUSE SUBSTITUTE (H-1) CONCURRED IN
upper
Mar 24, 2026
Upper · Passed
PASSED BY HOUSE WITH SUBSTITUTE (H-1) WITH IMMEDIATE EFFECT
upper
Mar 19, 2026
Lower · Passed
passed; given immediate effect Roll Call #104 Yeas 98 Nays 2 Excused 0 Not Voting 10
lower
Mar 19, 2026
Lower · Passed
substitute (H-1) adopted
lower
Mar 19, 2026
Lower · Passed
motion to discharge committee approved
lower
Mar 11, 2026
Committee
referred to Committee on Economic Competitiveness
lower
Mar 11, 2026
Introduced
received on 03/11/2026
lower
Mar 11, 2026
Upper · Passed
PASSED ROLL CALL # 23 YEAS 22 NAYS 13 EXCUSED 2 NOT VOTING 0
upper
Feb 24, 2026
Upper · Passed
REPORTED BY COMMITTEE OF THE WHOLE FAVORABLY WITHOUT AMENDMENT(S)
upper
Feb 12, 2026
Committee
REFERRED TO COMMITTEE OF THE WHOLE
upper
Feb 12, 2026
Upper · Passed
REPORTED FAVORABLY WITHOUT AMENDMENT 2/11/2026
upper
Sep 22, 2025
Committee
REFERRED TO COMMITTEE ON LOCAL GOVERNMENT
upper
Sep 22, 2025
Introduced
INTRODUCED BY SENATOR KEVIN HERTEL
upper
1 primary · 0 co-sponsors

Sponsors

Role
Legislator
Party
State
District
P
Photo of Kevin Hertel
Kevin Hertel
DDemocratic
MI
12