What is the average effective property-tax rate in Wisconsin?

Wisconsin's statewide average effective property-tax rate is approximately 1.51% of market value, according to the Tax Foundation and Lincoln Institute of Land Policy (2024). That places Wisconsin among the top 15 highest property-tax states in the US. On a $300,000 home the annual bill comes to roughly $4,530, or about $378 per month.

Why are Wisconsin property taxes so high compared with neighbouring states?

Wisconsin relies heavily on local property taxes to fund public schools, counties, municipalities, and special districts. The state does not levy a statewide general property tax, so nearly all of the burden falls on locally set millage rates. School district levies alone can represent 50–60% of a typical Wisconsin property-tax bill. By contrast, states like Minnesota and Illinois supplement local funding with larger state income-tax transfers, spreading the load.

What is the Wisconsin Lottery and Gaming Credit?

The Lottery and Gaming Credit is a direct reduction applied to the property-tax bill of owner-occupied primary residences in Wisconsin. The credit amount varies by levy year but typically ranges from $158 to $175. It appears automatically on the November tax bill if your property qualifies as your primary residence by January 1 of the tax year. No separate application is required for most homeowners — the credit is determined when you claim the primary-residence designation with your local assessor.

Which Wisconsin county has the highest and lowest property-tax rate?

Milwaukee County consistently carries the highest effective rate in Wisconsin, averaging around 2.20%, driven by high school levy demands and dense municipal overlays. Iron County in the rural north is among the lowest, around 0.80%, reflecting lower school and service costs. Dane County (Madison) sits near 1.85%, while suburban Waukesha County is lower at roughly 1.30%. Even within a county, rates vary by municipality and school district, so two properties a mile apart can face meaningfully different bills.

How does Wisconsin assess property for tax purposes?

Wisconsin uses full-value (equalized) assessment, meaning residential property is generally assessed at or close to 100% of its estimated fair market value. Assessors are required by state law to maintain assessments within 10% of full market value. Agricultural land is assessed at use value (based on the income the land generates for farming) rather than market value, which is why farm effective rates differ from residential. The Wisconsin Department of Revenue publishes assessment ratios for each municipality; a ratio below 1.00 means local assessed values lag behind market values.

When are Wisconsin property taxes due?

Wisconsin property taxes are billed in December and can be paid in full by January 31 of the following year or in two installments: the first half by January 31 and the second half by July 31. Payments are made to your local municipal treasurer (city, town, or village), not the county. After the January 31 deadline, delinquent taxes are returned to the county and interest and penalties begin to accrue. Contact your municipal clerk or treasurer for exact due dates and accepted payment methods.

Wisconsin Property Tax Calculator

The Wisconsin property tax calculator gives you a fast, reliable estimate of your annual and monthly property-tax bill based on your home value and the state’s average effective rate. Whether you are buying a first home in Madison, refinancing in Green Bay, or comparing counties before relocating, you can see exactly what to budget in seconds — no spreadsheet required.

How the calculation works

Wisconsin assesses residential property at close to 100% of estimated market value — unlike some states that apply a fractional assessment ratio before multiplying by the mill rate. That means you can use your purchase price, appraisal value, or online estimate directly as the starting figure.

The effective rate used in this calculator is the standard comparison shortcut:

Effective rate = total tax paid ÷ market value

So when this tool quotes Wisconsin’s statewide average of 1.51%, it means that on average Wisconsin homeowners pay $15.10 in annual property tax for every $1,000 of their home’s market value. The formula is simply:

Annual tax = home value × (effective rate ÷ 100)

Monthly tax is the annual figure divided by 12 — useful for matching the figure to your mortgage escrow line.

Worked example

Suppose you purchase a home in Dane County (Madison area) for $380,000. Dane County’s average effective rate is approximately 1.85%.

Annual property tax: $380,000 × 0.0185 = $7,030
Monthly property tax: $7,030 ÷ 12 = $586
Tax per $1,000 of value: $18.50

Compare that to the statewide average of 1.51%: the same $380,000 home at the state average would generate an annual bill of roughly $5,738 — a $1,292 per-year difference purely from county location. Moving to Waukesha County at 1.30% would drop the same home to $4,940 per year, saving over $2,000 annually compared with Dane County.

Home value	Eff. rate	Annual tax	Monthly
$200,000	1.51%	$3,020	$252
$300,000	1.51%	$4,530	$378
$450,000	1.51%	$6,795	$566
$300,000	1.85% (Dane)	$5,550	$463
$300,000	2.20% (Milwaukee)	$6,600	$550
$300,000	1.30% (Waukesha)	$3,900	$325

All figures are calculated in your browser — nothing is uploaded or stored.

Why Wisconsin property taxes are above the national median

Wisconsin’s effective rate of 1.51% ranks it among the top 15 highest property-tax states. Several structural factors explain the elevated burden:

School district levies dominate the bill. In most Wisconsin municipalities, the school district portion alone accounts for roughly half the total levy. Voters can approve additional referenda levies beyond state-imposed revenue limits, pushing rates higher in growing suburban districts.
Full-value assessment. Because Wisconsin assesses at close to 100% of market value (rather than 10%–20% as some states do), the taxable base is large, making even modest mill rates translate into significant dollar amounts.
No statewide property tax. Every dollar of property tax is locally set. Counties, municipalities, school districts, technical college districts, and special districts all levy independently, and those levies stack on top of each other.
State aid offsets are partial. Wisconsin distributes equalization aid to school districts and shared revenue to municipalities, but the amounts have not kept pace with rising property values and service costs, leaving local levies to fill the gap.

Understanding your Wisconsin tax bill

A Wisconsin property-tax bill lists each taxing jurisdiction separately — county, municipality, school district, technical college, and any special districts. The mill rate for each layer is published by December 1 each year. Key items to check:

Assessed value vs. equalized value. Your notice shows the local assessed value. The state also publishes an equalized (full market) value for each municipality; if the two diverge, the state’s equalized figure is the fairer market-value benchmark.
Lottery and Gaming Credit. Owner-occupants of a primary residence receive a direct credit (typically $158–$175) deducted automatically from the gross tax — no application needed for most homeowners.
School Levy Tax Credit. This state-funded credit further reduces the bill; the exact amount depends on your property’s value relative to the municipal total.
First-dollar credit. A small additional state credit applies to all improved property.

This calculator uses the effective rate (the net tax after credits, divided by market value) as published by the Tax Foundation and Lincoln Institute, so the credits are already baked into the 1.51% figure. Your county treasurer’s office can provide a breakdown of the current year’s levies for your specific parcel.