Even as income levels rise across Wisconsin, the revenue generated from those gains is not keeping pace.
That’s the message embedded in municipal data released by the Wisconsin Policy Forum, which reveals a growing gap between what residents earn and what they pay in state income taxes.
In 2023, the total adjusted gross income (AGI) reported by residents of Wisconsin cities and villages rose by 3.3%, topping $168 billion. This continues a trend of strong income growth over the last three years, following increases of 6.2% in 2021 and 8.0% in 2022. Yet the amount of individual income tax paid remained flat at $6.3 billion in 2023, showing little movement despite the broader economic expansion.
This divergence is not new. According to the Forum’s analysis, AGI has followed a steady upward path since 2019, while income tax receipts have flattened or slowed—an outcome influenced by recent state income tax cuts. The data marks a shift from the 2010s, when both metrics typically rose together year over year.
The disconnect is particularly notable because income taxes remain a primary revenue stream for Wisconsin’s state government. In fiscal year 2022, individual income taxes accounted for nearly half of all general fund revenues. A long-term slowdown in this category, even in the face of rising earnings, could carry consequences for school funding, shared revenue to municipalities, and the state’s ability to weather future economic downturns.
Much of the recent tax flattening stems from policy changes. In 2021, Wisconsin implemented a substantial rate cut for the second income bracket, reducing the rate from 6.27% to 5.3%. Additional cuts followed in 2023, with further plans advanced by legislative leaders seeking to compress the state’s graduated tax structure. While proponents argue that such reforms make Wisconsin more competitive, critics warn of long-term fiscal imbalance.
The 2025 MuniTool doesn’t weigh in on the political debate. But its numbers highlight a fiscal trend that appears increasingly structural: income is rising, but the public share is shrinking.
That shift may help explain why some lawmakers are expressing renewed urgency around Wisconsin’s approach to long-term budget stability. Though the state entered 2024 with a sizable budget surplus, projections from the Legislative Fiscal Bureau suggest that sustained revenue compression could limit future flexibility.
That will be especially true if inflation drives up state costs in areas like Medicaid, education, or public employee benefits. Meanwhile, the disconnect between income and taxes is being felt at the local level.
While municipalities do not levy their own income taxes, they rely heavily on shared revenue payments from the state, which are in turn funded primarily by income and sales tax collections. If individual income tax growth stalls, local governments may struggle to maintain services without greater reliance on property taxes or user fees.
The implications vary across the state. In higher-income suburbs and fast-growing areas, rising AGI might not be immediately disruptive. But in lower-growth rural regions or older urban cores, state aid often plays a critical role in stabilizing budgets. Any long-term flattening of the income tax base could worsen geographic disparities in service quality, infrastructure maintenance, and public safety investments.
The Forum’s report does not identify specific municipalities, but the trend is consistent across all cities and villages in Wisconsin. That consistency suggests the underlying dynamic is not simply demographic or economic, but fiscal and policy-driven. In short, the structure of Wisconsin’s income tax system may be decoupling from the growth of the state’s economy.
It’s a trend already playing out in other parts of the country. States such as North Carolina, Iowa, and Arizona have enacted similar tax cuts in recent years, aiming to spur investment or return excess revenue to taxpayers. But fiscal analysts warn that the early effects—strong surpluses, then slower growth—may give way to difficult trade-offs if broader economic conditions turn.
For now, Wisconsin’s rising incomes suggest economic strength. But the muted tax response could signal a growing challenge for future budget writers. The 2025 MuniTool’s data leaves little doubt that personal earnings are up, yet overall revenue isn’t following.
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Cora Yalbrin (via ai@milwaukee)
