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Updated 2025 Tax Year

Kewaunee County
Property Tax Guide

Everything you need to know about property taxes in Kewaunee County, WI. Rates, due dates, exemptions, and how it affects your monthly payment.

10 Official Sources
8 min read
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Quick Facts
Tax Rate
Varies by district and location within county due to overlapping taxing jurisdictions
Exemptions
5+ Available
Section 1

How Property Tax Works

Kewaunee County, Wisconsin operates on a property tax system that serves as the primary funding mechanism for essential local services including schools, municipal services, county operations, and various special districts. Property taxes in Kewaunee County are assessed based on fair market value, with an assessment ratio of 0.683179717 used to calculate taxable assessed value from market value. The county assesses various property classes including residential (Class 1), commercial (Class 2), manufacturing (Class 3), agricultural (Class 4), undeveloped (Class 5), forest lands (Class 6), and other properties (Class 7).

Effective tax rates in Kewaunee County vary significantly by location within the county due to overlapping special taxing districts, school districts, and municipal boundaries. While Wisconsin's statewide average property tax rate is approximately 1%, actual rates in Kewaunee County depend on your specific location and the combination of taxing authorities that serve your property. Property owners should expect rate variations based on their school district, fire district, sanitary district, and other local special assessments that may apply to their specific parcel.

Section 2

What Makes Up Your Tax Bill

ComponentDescription
County LevyBasic county services, administration, public safety
School DistrictK-12 education funding (varies by district within county)
Municipal LevyCity/town services (varies by municipality)
Technical CollegeWisconsin technical college system assessment
Special DistrictsFire districts, sanitary districts, library districts (location-specific)

Note: 2025 property tax rates for Kewaunee County are not yet available. Tax rates vary significantly by location within the county due to different combinations of school districts, municipalities, and special taxing districts. For current rates specific to your property, contact the Kewaunee County Assessor's office or check the county's official website. All rates apply to the assessment value calculated using the county's assessment ratio of 0.683179717.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Kewaunee County, property taxes are due in two installments:

Pro tip: If you pay through mortgage escrow, your lender splits these payments across your monthly mortgage. If you pay directly, set calendar reminders to avoid late penalties.
Section 4

Supplemental Tax Bills

Supplemental taxes in Kewaunee County are additional property tax assessments that occur when there are mid-year changes to property ownership, value, or use that weren't captured in the regular assessment cycle. Common triggers include new construction completion, major improvements, change of property use classification, or correction of assessment errors. These taxes are calculated by applying the current tax rate to the difference between the old and new assessed values, prorated for the portion of the tax year the change was in effect.

For example, if you complete a $100,000 home addition in March and your total tax rate is 2.0%, the supplemental tax would be calculated on the additional assessed value (using the 0.683179717 assessment ratio) for the remaining months of the tax year. The supplemental bill would be issued separately from your regular property tax bill and would have its own due date, typically 30 days from the date of issuance.

Example Calculation

$300,000 Property Value:

  • Market Value: $300,000
  • Assessed Value: $300,000 × 0.683179717 = $204,954
  • Less Homestead Credit (if applicable): -$500 (example)
  • Net Taxable Value: $204,454
  • Annual Tax (estimated 2.2% rate): $4,498
  • Monthly Escrow: $375

$600,000 Property Value:

  • Market Value: $600,000
  • Assessed Value: $600,000 × 0.683179717 = $409,908
  • Less Homestead Credit (if applicable): -$500 (example)
  • Net Taxable Value: $409,408
  • Annual Tax (estimated 2.2% rate): $9,007
  • Monthly Escrow: $751

$1,000,000 Property Value:

  • Market Value: $1,000,000
  • Assessed Value: $1,000,000 × 0.683179717 = $683,180
  • Less applicable credits: -$500 (example)
  • Net Taxable Value: $682,680
  • Annual Tax (estimated 2.2% rate): $15,019
  • Monthly Escrow: $1,252

Note: Tax credits shown require application and approval. Actual rates vary by specific location within the county.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Kewaunee County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects 1/12 of your estimated annual property tax bill each month along with your mortgage payment, holding these funds in a separate escrow account. Since Kewaunee County property taxes are due January 31st annually, your lender will make the payment directly to the county treasurer before this deadline.

Lenders typically conduct an annual escrow analysis to adjust your monthly payment based on actual tax bills and account balance. If your property taxes increase due to reassessment or rate changes, your monthly escrow payment may increase accordingly. You have the right to receive annual escrow statements and can request information about your escrow balance at any time. If you pay off your mortgage or refinance, ensure that any escrow funds are properly transferred or refunded, and verify that you receive future tax bills directly from the county.

How HonestCasa Helps
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Section 6

Frequently Asked Questions

Q: When are Kewaunee County property taxes due? A: Property taxes are due by January 31st annually. This is a firm deadline, and payments received after this date are subject to penalties and interest charges.

Q: What tax credits are available and how do I apply? A: Wisconsin offers several tax credits including the Homestead Credit for qualifying homeowners and the School Levy Credit. These credits require separate applications filed with the Wisconsin Department of Revenue, typically by the filing deadline for income tax returns. Credits are NOT automatic and must be applied for annually.

Q: How does the Homestead Credit work? A: The Homestead Credit is designed to limit property tax increases on your primary residence, not reduce market value. It caps assessment increases and provides tax relief based on income and property value. You must file a separate application with the state, and eligibility is based on household income limits and other qualifying criteria.

Q: How often are properties reassessed in Kewaunee County? A: Wisconsin requires property reassessment cycles, but frequency varies by municipality within the county. Contact your local assessor for your specific reassessment schedule. You have the right to appeal assessments through the local board of review process.

Q: What are the penalties for late payment? A: Property taxes paid after January 31st are subject to interest charges and penalties. Interest typically accrues monthly until the full amount is paid. Continued non-payment can eventually lead to tax lien procedures.

Q: Can I pay my property taxes online? A: Contact the Kewaunee County Treasurer's office for current online payment options and accepted payment methods. Many Wisconsin counties offer online payment systems, but availability and fees vary.

Q: Why do tax rates vary within Kewaunee County? A: Different areas of the county are served by different combinations of school districts, fire districts, sanitary districts, and municipalities. Each taxing authority sets its own levy, resulting in different total tax rates depending on your property's location.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with your local board of review during their designated meeting period, typically in May. Contact your municipal assessor for specific dates, procedures, and required documentation for filing an appeal.

Verified Sources

Backed by 10 Official Government Sources

Every fact in this guide is sourced from official county, state, and federal documents.

01
County
2025 Statement of Assessment for 5soakewaunee Countyrevenue.wi.gov
02
Local Government Revenue Optionsdocs.legis.wisconsin.gov
03
2025 Guide for 70.75 Reassessmentsrevenue.wi.gov
04
County
Official Kewaunee County, Wisconsin websiteco.kewaunee.wi.gov
05
Tax Doc
Taxes & Assessmentscityofkewauneewi.gov
06
ADJOURNED SESSIONwinnebagocountywi.gov
07
COMMON COUNCIL MEETINGcityofkewauneewi.gov
08
Tax Doc
The Homestead Tax Credit Program Summaryrevenue.wi.gov
09
Tax Doc
DOR Property Tax Exemption Formsrevenue.wi.gov
10
County
Kewaunee Countyrevenue.wi.gov
All sources verified as of 2025 Tax Year

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