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Updated 2025 Tax Year

Walworth County
Property Tax Guide

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

9 Official Sources
8 min read
Quick Facts
Tax Rate
Approximately 1% of assessed value base rate, varies by municipality and school district within county
Exemptions
5+ Available
Section 1

How Property Tax Works

Walworth County, Wisconsin operates under the state's property tax system, which serves as the primary funding mechanism for local government services, schools, and special districts throughout the county. Property owners in Walworth County pay taxes that support essential services including public safety, road maintenance, county operations, local school districts, and various special purpose districts such as lake management and sanitary districts.

The effective property tax rate in Walworth County typically ranges around Wisconsin's base rate of approximately 1% of assessed value, though actual rates vary significantly by location within the county. This variation occurs because property taxes include multiple components: county levy, municipal levy, school district levy, and various special district assessments. Properties in different areas of the county fall under different combinations of these taxing jurisdictions, meaning two similar properties may have different tax bills depending on their specific location and the special districts that serve them.

Property assessments in Walworth County are conducted to reflect market value, with no statewide assessment cap limiting annual increases. However, various tax credits are available to qualifying property owners to help manage tax burdens, though most require annual application and are not automatically applied.

Section 2

What Makes Up Your Tax Bill

ComponentApproximate RateDescription
County LevyVaries by yearFunds county government operations, sheriff's department, courts, and county services
Municipal LevyVaries by municipalityCity, town, or village services including local roads, fire, police, and municipal operations
School District LevyVaries by districtK-12 education funding for local school districts throughout Walworth County
Technical College~0.15-0.25%Wisconsin Indianhead Technical College district assessment
Special DistrictsVaries widelyLake districts, sanitary districts, library districts, and other special purpose assessments

Note: 2025 tax rates are typically finalized in late 2024. Rates shown are estimates based on historical data and vary significantly by specific location within Walworth County due to different combinations of special taxing districts. Contact the Walworth County Treasurer's office for current levy year rates specific to your property location.

The total effective rate for any property depends on the specific combination of taxing jurisdictions serving that location. Properties near lakes often carry additional lake district assessments, while properties in different school districts will have varying educational levies.

Section 3

When Are Property Taxes Due?

For the 2025/2026 tax year in Walworth 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 property taxes in Walworth County are additional tax assessments that occur when there are changes to property ownership, improvements, or corrections to assessments during the tax year. The most common triggers include new construction completion, major renovations that increase property value, ownership transfers that reveal unreported improvements, or corrections to assessment errors.

When supplemental taxes are levied, they are calculated by applying the current tax rate to the difference between the new assessed value and the previous assessed value, prorated for the portion of the tax year remaining. For example, if a property owner completes a $100,000 addition in March and the total tax rate is 2.0%, the supplemental tax would be approximately $2,000 prorated for the remaining 9 months of the tax year, resulting in a supplemental bill of about $1,500.

Supplemental tax bills are typically issued within 30-60 days of the assessment change and have separate due dates from regular property tax installments. Property owners receive a separate notice explaining the reason for the supplemental assessment and the calculation method used.

Example Calculation

Example 1: $300,000 Property

  • Market/Assessed Value: $300,000
  • Less: First Dollar Credit (if applicable): -$500
  • Less: School Levy Credit (estimated): -$600
  • Net Taxable Value: $298,900
  • Applied Tax Rate: 1.95%
  • Annual Tax: $5,829
  • Monthly Escrow: $486

Example 2: $600,000 Property

  • Market/Assessed Value: $600,000
  • Less: First Dollar Credit (if applicable): -$500
  • Less: School Levy Credit (estimated): -$1,200
  • Net Taxable Value: $598,300
  • Applied Tax Rate: 2.10%
  • Annual Tax: $12,564
  • Monthly Escrow: $1,047

Example 3: $1,000,000 Property

  • Market/Assessed Value: $1,000,000
  • Less: First Dollar Credit (if applicable): -$500
  • Less: School Levy Credit (estimated): -$1,500
  • Net Taxable Value: $998,000
  • Applied Tax Rate: 2.25%
  • Annual Tax: $22,455
  • Monthly Escrow: $1,871

Note: Tax credits shown require annual application and eligibility verification. Actual rates vary by specific location within Walworth County due to different special district combinations. Examples use estimated rates for illustration purposes.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Walworth County require borrowers to maintain an escrow account for property tax payments, particularly when the loan-to-value ratio exceeds 80%. Lenders collect monthly escrow payments as part of the mortgage payment, typically calculating the monthly amount by dividing the previous year's tax bill by 12 and adding a cushion for potential increases.

Property taxes in Walworth County are payable in two installments: the first installment is typically due by January 31st, and the second installment is due by July 31st. Lenders usually make payments shortly before these due dates to ensure timely payment and avoid penalties. When tax bills are received, lenders review them against escrowed amounts and may adjust monthly escrow payments if there's a significant difference between collected amounts and actual tax obligations.

Property owners with escrow accounts should verify that their lender receives and pays tax bills correctly. The Walworth County Treasurer's office can confirm whether payments have been received and can provide payoff information to lenders. If you believe your escrow payment is incorrect, contact your lender with a copy of your current tax bill to request a recalculation of the monthly escrow amount.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
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Section 6

Frequently Asked Questions

Q: When are property taxes due in Walworth County? A: Real estate taxes are due in two installments: January 31st and July 31st for the current tax year. Personal property taxes are due by January 31st in a single payment.

Q: What tax credits are available and do I need to apply? A: Wisconsin offers several tax credits including the First Dollar Credit, School Levy Credit, and Lottery Credit. Most credits require annual application or verification of eligibility. Contact the Walworth County Clerk's office for current application requirements and deadlines.

Q: How does the Homestead Credit work? A: The Homestead Credit limits the annual increase in assessed value for qualifying homeowners, typically capping increases at 10% per year rather than reducing the actual market value. This credit requires annual application and income verification, with specific eligibility requirements and application deadlines.

Q: How often are properties reassessed in Walworth County? A: Wisconsin law requires properties to be assessed annually, though not all properties receive physical inspections each year. The county assessor uses market data, recent sales, and periodic inspections to maintain current assessments.

Q: How do I appeal my property assessment? A: Assessment appeals must be filed with the local Board of Review, typically meeting in May. Contact the Walworth County Clerk's office for specific dates, procedures, and required documentation for filing an appeal.

Q: What are the penalties for late property tax payments? A: Late payments are subject to interest charges and penalties. Interest typically begins accruing after the due date, with additional penalties for significantly delinquent payments. Contact the County Treasurer for specific penalty rates and payment options.

Q: Can I pay property taxes online? A: Yes, Walworth County typically offers online payment options through the County Treasurer's website. Check the official Walworth County website for current online payment portals and accepted payment methods.

Q: Why do properties in the same area have different tax rates? A: Tax rates vary based on the specific combination of special districts serving each property, including school districts, lake districts, sanitary districts, and other special purpose districts. Two neighboring properties may fall under different district boundaries, resulting in different total tax rates.

Q: What happens if I don't receive my tax bill? A: Property owners are responsible for paying taxes even if they don't receive a bill. Contact the Walworth County Treasurer's office immediately to obtain a copy of your bill and avoid late payment penalties.

Q: How do special district taxes affect my bill? A: Special district taxes are additional assessments for services like lake management, sanitary districts, or library districts. These appear as separate line items on your tax bill and vary significantly based on your property's location and the districts that serve it.

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