Property taxes in Wisconsin are assessed and collected at the local level — primarily by counties and municipalities — with rates varying significantly depending on where your home is located. The statewide average effective rate for 2025is 1.73%, meaning a homeowner with a $272,300 median-value home typically pays around $4,710 per year in property taxes. For a monthly perspective, that works out to roughly $393/month — a line item that should factor into every home purchase decision in Wisconsin.
Wisconsin uses a 100% assessment ratio for primary residential properties. Most states with a 100% ratio assess property at full market value — what the county believes your home would sell for — and apply a millage rate directly to that figure.
Available Exemptions in Wisconsin
Homestead Tax Credit: income-based credit of up to $1,460 for homeowners with income under $24,680 and property value under $401,200 (2024). Applied on state income tax return.
Property Tax Deferral Loan Program: seniors 65+ can defer property taxes until the property is sold or transferred. The deferred amount accrues interest.
Disabled Veterans Exemption: 100% service-connected disabled veterans: full property tax exemption on primary residence. Surviving spouses may also qualify.
What Makes Wisconsin's Property Tax System Unique
Wisconsin has one of the higher property tax rates in the Midwest. Milwaukee County has the highest effective rates; Dane County (Madison) is also elevated. The state froze school levy rates, shifting more of the burden to municipalities. Wisconsin uses a lottery and gaming credit that reduces property tax bills directly (typically $200–$500/year).
When Are Wisconsin Property Taxes Due?
Wisconsin property taxes are paid on a annual basis. Due dates: January 31 (full payment or first installment). Second installment July 31.. Missing a due date typically results in penalty interest (often 1–2% per month) and eventually tax liens, so it is important to calendar these dates well in advance — especially if you have a mortgage and your lender handles property tax through escrow (in which case they pay on your behalf from your escrow account).
How to Appeal Your Property Tax Assessment in Wisconsin
If you believe your property has been over-assessed — which is surprisingly common, especially after rapid market changes — you have the right to appeal. File with your municipal Board of Review in May (open book period is in April). Further appeals go to the Wisconsin Tax Appeals Commission.
To build a strong appeal, gather comparable sales (homes similar in size, age, and condition that sold recently for less than your assessed value), photos documenting property defects, and any independent appraisals you have. Many homeowners who appeal see their assessments reduced — and some jurisdictions allow free informal hearings before a formal appeal is required.
Property Tax Rates by Major Wisconsin Cities
Within Wisconsin, effective property tax rates vary significantly by city and county. Here are the major areas and what to expect:
- Milwaukee— rates in this area may differ from the 1.73% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Madison— rates in this area may differ from the 1.73% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Green Bay— rates in this area may differ from the 1.73% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Kenosha— rates in this area may differ from the 1.73% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
- Racine— rates in this area may differ from the 1.73% statewide average. Use the calculator above with your specific assessed value for a more accurate estimate.
Note: County rates within Wisconsin can range from well below to well above the statewide average. Always verify the current mill rate with your county assessor's office.
Pro Tips for Wisconsin Property Owners
- Apply for every exemption you qualify for — many homeowners leave money on the table by not filing for the homestead or senior exemption. Applications are typically annual or one-time, and deadlines are firm.
- Review your assessment notice every year. If the county's estimate of your home's market value seems too high relative to what similar homes are actually selling for, appeal it. Even a 10% reduction on a $400,000 assessment saves $400–$700/year at typical Wisconsin rates.
- If you have a mortgage, confirm with your lender whether property taxes are paid via an escrow account. If so, ensure your escrow balance is adequate — under-funded escrow leads to an escrow shortage and a sudden increase in your monthly mortgage payment.
- Pay early if your state offers discounts. Some states (like Florida) give 1–4% discounts for early payment. On a $5,000 tax bill, a 4% early-payment discount saves $200 — for essentially zero work.
- Property taxes are generally deductible on your federal income tax return as part of the SALT deduction (state and local taxes), subject to the $10,000 cap introduced by the Tax Cuts and Jobs Act. For high-tax states, this cap is often a binding constraint.