Court ruling could raise property taxes across Wisconsin

A Dane County judge's recent ruling striking down key provisions of Act 10 has sparked fears of sharp property tax increases across Wisconsin, including Milwaukee. The 2011 law limited public employee collective bargaining to control school and local government costs, but its potential repeal could add $624 or more annually to property taxes on a $300,000 home if districts pass on expenses, according to the Wisconsin Institute for Law & Liberty's new calculator.[2] The case, now pending before the Wisconsin Court of Appeals after briefs were submitted in late 2025, could head to the state Supreme Court for a final say.[1][6]

Act 10, passed amid massive protests 15 years ago, curbed union power for most public workers while exempting police and firefighters, a point challengers call unconstitutional under equal protection rules.[3][4] Groups like the Institute for Reforming Government warn repeal would erase billions in taxpayer savings—$1.6 billion yearly for schools alone—leading to layoffs or service cuts.[1][2] Unions, meanwhile, are already pushing for broader bargaining, as seen in Madison schools demanding new talks post-ruling.[5]

For Milwaukee residents, this hits home: higher taxes strain family budgets amid rising living costs, potentially forcing cuts to neighborhood schools or public safety.[2][5] The city's schools, already navigating tight budgets, could face $1.788 billion statewide in new costs shifted locally, squeezing property owners from Wauwatosa to the south side.[2]

The Court of Appeals is expected to rule soon, with appeals likely pushing a Supreme Court decision into late 2026 or beyond, keeping taxpayers in limbo.[6]