Rate Breakdown

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

How Property Tax Works in Grant County

In Grant County, Wisconsin, property taxes are calculated 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 Grant County Assessor’s Office evaluates properties annually to determine their fair market value. Assessments are typically based on recent sales of comparable properties.
• Millage Rates: Tax rates are expressed in "mills," where 1 mill equals $1 per $1,000 of assessed value. Rates are set by school districts, municipalities, and the county.
• Tax Calculation: Multiply your property’s assessed value by the total mill rate (divided by 1,000) to estimate your annual tax liability.

Tax bills are mailed in December, with payments due the following January.

Available Exemptions

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

• Homestead Credit: Low-income homeowners may qualify for a refundable credit based on property taxes paid.
• Senior Citizen Exemption: Residents aged 65+ may be eligible for a tax credit if their household income falls below state thresholds.
• Disability Exemption: Individuals with disabilities may qualify for additional relief under the Wisconsin Disabled Veterans and Surviving Spouses program.
• Veteran Exemptions: Veterans with service-connected disabilities or their surviving spouses may receive partial or full property tax exemptions.

Applications for exemptions must be filed with the Grant County Treasurer’s Office by the specified deadlines.

Payment Schedule & Deadlines

Grant County property taxes follow a strict payment schedule:

• Full Payment Deadline: Taxes are due in full by January 31. Payments made after this date incur a 1.5% monthly penalty.
• Installment Option: Homeowners may pay in two installments—50% by January 31 and the remaining 50% by July 31—without penalty.
• Late Payments: Delinquent taxes accrue interest and may result in a tax lien or foreclosure if unpaid for multiple years.

Payments can be made online, by mail, or in person at the Treasurer’s Office.

Appealing Your Assessment

If you believe your Grant County property assessment is inaccurate, follow these steps to appeal:

• Review Your Assessment: Check your assessment notice (mailed in spring) for errors in property details or valuation.
• File an Appeal: Submit a written appeal to the Grant County Board of Review by the deadline (typically in May or June). Include evidence such as recent comparable sales or an independent appraisal.
• Hearing: Attend the Board of Review hearing to present your case. The board may adjust your assessment if justified.

For complex disputes, consider consulting a property tax professional or attorney.