Wisconsin has historically featured some of the highest property taxes in the nation, but significant legislative overhaulsincluding the 2024 repeal of the personal property tax and massive increases in shared revenueare actively working to reduce local levies. The state also heavily offsets residential bills using the Lottery and Gaming Credit (est., Tax Foundation 2026).
Property taxes are the primary source of revenue for Wisconsin’s public schools, municipalities, counties, and technical colleges. Because the state historically relied heavily on local property levies rather than expansive state funding, rates are higher than the national average.
100% Equalized Value and Reappraisals
In Wisconsin, the target assessment ratio is 100% of fair market value. Local assessors value properties annually as of January 1. However, full physical revaluations are expensive and not required every year.
To ensure fairness when allocating school and county taxes across different municipalities, the Wisconsin Department of Revenue calculates an “Equalized Value” annually. By law, local municipalities must ensure their assessed values are within 10% of this state-determined full market value at least once every five years.
Wisconsin statewide effective rate. On a $350,000 home, expect approximately $4,620 per year at the statewide average. (est., Tax Foundation 2026).
| Home Value | Annual Tax (est.) | Monthly Payment | vs. U.S. Average |
|---|---|---|---|
| $200,000 | $2,640 | $220 | +$840 above avg. |
| $350,000 | $4,620 | $385 | +$1,470 above avg. |
| $500,000 | $6,600 | $550 | +$2,100 above avg. |
| $750,000 | $9,900 | $825 | +$3,150 above avg. |
| $1,000,000 | $13,200 | $1,100 | +$4,200 above avg. |
Estimates use 1.32% statewide effective rate. U.S. average uses 0.90%. Source: est., Tax Foundation / Census ACS.
Strict Levy Limits (Net New Construction)
While Wisconsin does not cap the assessed value of individual homes, state law strictly limits how much a local government can increase its total property tax levy (the total amount of revenue collected).
A municipality’s allowable levy increase is directly tied to its “valuation factor”the percentage change in equalized value due exclusively to net new construction (new improvements minus demolitions). If a town has zero new construction, it cannot raise its property tax levy unless voters approve it via a special referendum.
The Lottery & Gaming Credit
To offset high tax rates, Wisconsin provides direct relief to primary homeowners using revenue from the state lottery, parimutuel on-track betting, and bingo. The Lottery and Gaming Credit appears as a direct reduction on your property tax bill.
You must actively apply for this credit, and the property must be your primary residence as of January 1. (There is also a universal “First Dollar Credit” that applies automatically to any property with real improvements).
Massive 2024-2025 Legislative Overhauls (Act 12)
The Wisconsin legislature recently enacted historic changes to the property tax system to alleviate local burdens:
- Repeal of the Personal Property Tax: Effective Jan 1, 2024, the personal property tax on locally assessed business property was entirely eliminated.
- Shared Revenue Overhaul: 2023 Wisconsin Act 12 provided a massive 19.3% ($901.5 million) increase in state aid for cities and villages in 2024. This was explicitly designed to help municipalities fund police and fire services without resorting to property tax hikes via referendum.
- Telecommunications Tax Exemptions: Taking effect for 2026 assessments, cellular and radio towers will be excluded from property taxation entirely.
Estimated Tax Rates Across the Top 10 Counties
Milwaukee County levies the highest property taxes in the state (approaching 2.00%) due to the heavy financial burden of urban infrastructure and school funding. In contrast, conservative-leaning Waukesha County (Milwaukee’s largest suburb) maintains significantly lower rates (1.14%).
| County | Effective Rate | Annual Tax on $350k Home | Notes |
|---|---|---|---|
| Milwaukee County | 1.92% | $6,720 | Highest population; highest rate in top 10. |
| Dane County | 1.68% | $5,880 | Includes Madison (State Capital) and UW. |
| Waukesha County | 1.14% | $3,990 | Affluent Milwaukee suburbs; lowest top 10 rate. |
| Brown County | 1.37% | $4,795 | Includes Green Bay. |
| Racine County | 1.46% | $5,110 | Located between Milwaukee and Chicago. |
| Outagamie County | 1.22% | $4,270 | Includes Appleton. |
| Winnebago County | 1.49% | $5,215 | Includes Oshkosh. |
| Kenosha County | 1.59% | $5,565 | Bordering Illinois. |
| Rock County | 1.36% | $4,760 | Includes Janesville / Beloit. |
| Marathon County | 1.24% | $4,340 | Includes Wausau. |
Disclaimer and Methodology
This calculator provides estimates for planning purposes only, based on effective property tax rates (actual median taxes paid divided by median home values). In Wisconsin, the state targets 100% of fair market value for assessments. This calculator uses historical “effective rates” to bypass complex, overlapping local mill rates and equalization factors to provide a realistic estimate of actual homeowner burden.
What this calculator does not account for:
- The Lottery and Gaming Credit or the First Dollar Credit. These are calculated by the state as flat-dollar reductions based on local school tax rates and are subtracted directly from your final tax bill.
- Referendums. Wisconsin law requires voter approval to exceed levy limits, meaning school or city referendums can dramatically spike localized rates overnight.
How to get an accurate estimate:
- Find your home’s Equalized Assessed Value on your municipal property search portal.
- Multiply the value by your municipality’s total net mill rate (including state, county, local, and school levies), and divide by 1,000.
- Subtract the specific dollar amounts for the Lottery Credit and First Dollar Credit.
Data sources: Statewide effective rate and aggregate county effective rates derived from the Tax Foundation, Census ACS, and SmartAsset aggregations. Statutory rules, equalization laws, and recent legislative overhauls (Act 12) sourced from the Wisconsin Department of Revenue and the Legislative Fiscal Bureau.
Return to the National Property Tax Calculator to compare Wisconsin with other states.
