Rate Breakdown

Property taxes in Trempealeau County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

How Property Tax Works in Trempealeau County

Property taxes in Trempealeau County are based on the assessed value of your property and the combined millage rates (tax rates) set by local taxing authorities. Here’s how the process works:

• Assessment: The Trempealeau County Assessor’s Office evaluates properties annually to determine their fair market value. Assessments are typically conducted as of January 1 each year.
• Millage Rates: Tax rates are calculated per $1,000 of assessed value. These rates are set by the county, school districts, municipalities, and technical colleges. Your total tax bill is the sum of these levies.
• Tax Calculation: Multiply your property’s assessed value by the total mill rate, then divide by 1,000. For example, a $200,000 home with a 20-mill rate would owe $4,000 annually.

Available Exemptions

Wisconsin offers several property tax exemptions that may reduce your tax burden:

• Homestead Credit: Low-income homeowners may qualify for a refundable credit based on property taxes or rent paid.
• Senior Citizen Exemption: Residents aged 65+ with income below $24,680 (2023) may qualify for a tax credit.
• Disability Exemption: Homeowners with disabilities may be eligible for reduced assessments or credits.
• Veteran Exemptions: Veterans with service-connected disabilities or their surviving spouses may qualify for property tax relief.

Applications for exemptions must be filed with the Trempealeau County Treasurer’s Office by the annual deadline (typically May 1).

Payment Schedule & Deadlines

Trempealeau County property taxes are due in two installments:

• First Installment: Due January 31 to your local municipality.
• Second Installment: Due July 31 to Trempealeau County.

Late payments incur a 1.5% monthly penalty (18% annually). If taxes remain unpaid for two years, the county may initiate foreclosure proceedings. Payment options include:

• Online via the county’s payment portal
• Mail or in-person at the Treasurer’s Office
• Prepayment plans (contact the Treasurer for details)

Appealing Your Assessment

If you believe your property is overassessed, follow these steps to appeal:

• Step 1: Review your assessment notice (mailed in spring) and compare it to similar properties in your area.
• Step 2: Contact the Trempealeau County Assessor’s Office to discuss discrepancies. Many issues are resolved informally.
• Step 3: File a formal appeal with the Board of Review by the deadline (usually mid-May). Provide evidence such as recent appraisals or sales data.
• Step 4: If unsatisfied, you may appeal to the Wisconsin Department of Revenue or circuit court.

Appeals must be filed within the annual window—check the county website or assessment notice for exact dates.