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Updated 2025 Tax Year

Sauk County
Property Tax Guide

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

10 Official Sources
8 min read
Quick Facts
Tax Rate
Varies by municipality: $64.53-$67.07 per $1,000 assessed value (varies significantly by district)
1st Due
Dec 31
Exemptions
5+ Available
Section 1

How Property Tax Works

Property taxes in Sauk County, Wisconsin, serve as a primary funding source for essential local services including schools, municipal operations, county government, and special districts. The county follows Wisconsin's property tax system where taxes are calculated based on assessed property values and local mill rates. Property owners can expect effective tax rates that vary significantly based on their specific location within the county, as rates are determined by the combination of county levy, municipal taxes, school district assessments, and any applicable special district charges.

Tax rates in Sauk County vary considerably by municipality and taxing district. For example, recent data shows the Town of Freedom with rates around $64.53-$67.07 per $1,000 of assessed value, while the Village of Sauk City shows rates of approximately $829.10-$864.33 per $1,000. These variations reflect different service levels, debt obligations, and special assessments across the county's various municipalities and school districts. Property owners should verify their specific tax rate with their local municipality, as your actual rate depends on your precise location and the combination of all applicable taxing jurisdictions.

Section 2

What Makes Up Your Tax Bill

ComponentRate Range (per $1,000)Description
County Levy$3.00-$5.00Sauk County operations, law enforcement, courts, social services
Municipal$2.00-$8.00City/village/town services, varies significantly by location
School District$8.00-$12.00K-12 education, varies by school district boundaries
Technical College$0.50-$1.50Wisconsin technical college system assessment
Special Districts$0.00-$3.00Fire districts, sanitary districts, other special assessments
Total Effective Rate$13.50-$29.50Combined rate varies by specific location

Rates shown are estimates for FY 2025-2026 tax year and vary significantly by municipality. The Village of Sauk City shows much higher rates due to municipal services and debt obligations. Contact your municipal clerk for exact rates applicable to your property address.

Section 3

When Are Property Taxes Due?

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

First Installment
Dec 31
Delinquent after Dec 10
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 Sauk County are additional assessments that may occur during the tax year when property values change due to new construction, major improvements, or ownership changes that trigger reassessment. These supplemental bills are calculated based on the difference between the old assessed value and the new assessed value, multiplied by the applicable tax rate, and prorated for the remaining months in the tax year.

For example, if you complete a $100,000 home addition in June that increases your assessed value, you would receive a supplemental tax bill for the increased assessment covering July through December of that tax year. The supplemental amount would be calculated as: ($100,000 increase × your local tax rate ÷ 1,000) × (6 months ÷ 12 months). Supplemental taxes are billed separately from your regular property tax installments and have their own due dates, typically 30 days from the bill date.

Example Calculation

Example 1: $300,000 Home in Town of Freedom

  • Assessed Value: $300,000
  • Less: Homestead Credit (if applied): -$1,200
  • Net Taxable Value: $298,800
  • Tax Rate: $67.07 per $1,000
  • Annual Tax: $20,032
  • Monthly Escrow: $1,669

Example 2: $600,000 Home in Village of Sauk City

  • Assessed Value: $600,000
  • Less: Homestead Credit (if applied): -$1,200
  • Net Taxable Value: $598,800
  • Tax Rate: $864.33 per $1,000
  • Annual Tax: $51,753
  • Monthly Escrow: $4,313

Example 3: $1,000,000 Home (Average County Rate)

  • Assessed Value: $1,000,000
  • Less: Homestead Credit (if applied): -$1,200
  • Net Taxable Value: $998,800
  • Tax Rate: $20.00 per $1,000 (estimated average)
  • Annual Tax: $19,976
  • Monthly Escrow: $1,665

Note: Homestead credit amounts are estimates and require annual application. Actual credits and rates vary by location and qualification status.

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Section 5

Escrow & Property Taxes

Most mortgage lenders in Sauk County require property tax escrow accounts to ensure timely payment of property taxes. Your lender collects monthly escrow payments along with your mortgage payment, typically calculating 1/12th of your annual property tax bill plus a small cushion for potential increases. The escrow account is analyzed annually, and you'll receive either a refund check or a notice of increased monthly payments if there's a shortage.

Property tax payments from escrow accounts are typically made by your lender in January for the first installment (due April 1st) and in July for the second installment (due September 1st). You should receive copies of the tax bills and payment confirmations from your lender. If you pay your own taxes without escrow, you're responsible for making both installment payments on time directly to the appropriate tax collector. Late payments after January 31st following the tax year are payable to the Sauk County Treasurer with additional penalties and interest charges.

How HonestCasa Helps
  • Understand whether your escrow is set correctly
  • See how rising taxes will change your monthly payment
  • Plan ahead instead of being surprised by "shortage" letters
Section 6

Frequently Asked Questions

Q: When are property taxes due in Sauk County? A: Property taxes for FY 2025-2026 are due in two installments: first installment due April 1, 2026, and second installment due September 1, 2026. Payments made after January 31st are considered delinquent and must be paid to the Sauk County Treasurer with penalties and interest.

Q: What tax credits are available and do I need to apply? A: Wisconsin offers several tax credits including the Homestead Credit for qualifying homeowners, which requires annual application. Most credits are NOT automatic and require filing applications with specific deadlines. Contact the Sauk County Assessor's office for available credits and application requirements specific to your situation.

Q: How does the Homestead Credit work? A: The Homestead Credit is a tax credit (not an exemption) that reduces your property tax bill and requires annual application. It doesn't reduce your property's assessed value but caps the annual increase in your property tax assessment, helping limit year-over-year tax increases for qualifying homeowners who occupy their property as their primary residence.

Q: How often are properties reassessed? A: Wisconsin properties are typically reassessed annually, though some municipalities may conduct comprehensive revaluations every few years. You'll receive assessment notices showing any changes to your property's assessed value, and you have the right to appeal if you believe the assessment is incorrect.

Q: What are the penalties for late payment? A: Late payments incur interest charges and penalties. After January 31st following the tax year, delinquent taxes are transferred to the county treasurer, and additional collection costs and interest are added. Properties with extended delinquency may eventually face tax sale proceedings.

Q: Can I pay my property taxes online? A: Yes, Sauk County offers online property tax payment options through their ALRS system. Visit the Sauk County website for secure online payment options, though convenience fees may apply for electronic payments.

Q: Why do tax rates vary within Sauk County? A: Tax rates vary significantly because they're comprised of multiple taxing jurisdictions including your municipality, school district, technical college district, and any special districts like fire or sanitary districts. Each jurisdiction sets its own levy, creating different combined rates across the county.

Q: How do special district taxes work? A: Special district taxes fund services like fire protection, sanitary districts, or lake districts. These appear as separate line items on your tax bill and vary based on your property's location within specific district boundaries. Not all properties are subject to all special districts.

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