2025 to 2026 Legislature · State Assembly bill

AB 870

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

In committee Last action March 23, 2026: Failed to concur in pursuant to Senate Joint Resolution 1

Official bill page and text: docs.legis.wisconsin.gov

Sponsors 1

Prime sponsor

Wittke

Status

In committee as of March 23, 2026. The 2025 to 2026 Legislature serves until the 2027 Legislature convenes on January 4, 2027.

Referred to: Assembly Rules, Assembly Ways and Means, Joint Tax Exemptions Survey, Senate Organization (from the official referral record)

Roll-call votes 0

No roll-call votes recorded for this measure.

Timeline 25

Date	Chamber	Action
March 23, 2026	Senate	Failed to concur in pursuant to Senate Joint Resolution 1
February 25, 2026	Senate	Available for scheduling
February 25, 2026	Senate	Read first time and referred to committee on Senate Organization
February 24, 2026	Senate	LRB correction (Assembly Substitute Amendment 1)
February 23, 2026	Senate	Received from Assembly
February 19, 2026	Assembly	Ordered immediately messaged
February 19, 2026	Assembly	Read a third time and passed, Ayes 58, Noes 35
February 19, 2026	Assembly	Rules suspended
February 19, 2026	Assembly	Ordered to a third reading
February 19, 2026	Assembly	Assembly Substitute Amendment 1 adopted
February 19, 2026	Assembly	Assembly Substitute Amendment 1 offered by Representative Wittke
February 19, 2026	Assembly	Read a second time
February 18, 2026	Assembly	Made a special order of business at 11:38 AM on 2-19-2026 pursuant to Assembly Resolution 14
February 10, 2026	Assembly	Report of Joint Survey Committee on Tax Exemptions received
February 9, 2026	Assembly	Executive action taken by joint survey committee on Tax Exemptions
February 6, 2026	Assembly	Referred to joint survey committee on Tax Exemptions pursuant to Assembly Rule 45 (4)
February 4, 2026	Assembly	Referred to committee on Rules
February 4, 2026	Assembly	Report passage as amended recommended by Committee on Ways and Means, Ayes 7, Noes 3
February 4, 2026	Assembly	Report Assembly Amendment 1 adoption recommended by Committee on Ways and Means, Ayes 7, Noes 3
February 4, 2026	Assembly	Executive action taken
January 28, 2026	Assembly	Fiscal estimate received
January 21, 2026	Assembly	Public hearing held
January 19, 2026	Assembly	Assembly Amendment 1 offered by Representative Wittke
January 16, 2026	Assembly	Read first time and referred to Committee on Ways and Means
January 16, 2026	Assembly	Introduced by Representative Wittke; cosponsored by Senator Marklein

Data: Open States (bulk data, October 1, 2026 monthly extract, which has no roll-call tallies; public data, attribution appreciated). Official record: docs.legis.wisconsin.gov. Bill pages link to the official text, not copied.