Rate Breakdown

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

How Property Tax Works in Washington County

Property taxes in Washington 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 Washington County Assessor’s Office evaluates your property’s market value annually. This assessed value determines your share of the tax burden.
• Millage Rates: Tax rates are set by school districts, municipalities, and the county, measured in "mills" (1 mill = $1 per $1,000 of assessed value). The total tax is calculated by multiplying your assessed value by the combined mill rate.
• Tax Bills: Bills are typically mailed in December, with payments due the following January.

Available Exemptions

Washington County offers several exemptions that may reduce your property tax liability:

• Homestead Exemption: Available to Wisconsin residents who own and occupy their primary home as of January 1. This exemption may lower your taxable assessment.
• Senior Citizen Exemption: Residents aged 65+ with limited income may qualify for additional reductions. Income limits apply.
• Disability Exemption: Homeowners with disabilities may be eligible for tax relief, depending on income and disability status.
• Veteran Exemptions: Veterans with service-connected disabilities or wartime service may qualify for partial or full exemptions. Documentation (e.g., DD-214) is required.

Apply for exemptions through the Washington County Treasurer’s Office by the annual deadline (typically early January).

Payment Schedule & Deadlines

Washington County property taxes are due in two installments:

• First Installment: Due by January 31. Payable to your local municipal treasurer.
• Second Installment: Due by July 31. Payable to the Washington County Treasurer.

Late Payments: Penalties apply for missed deadlines—1.5% monthly interest (18% annually) on unpaid balances. Delinquent taxes may result in a tax lien or foreclosure.

Payment Options: Pay online, by mail, or in person. Some municipalities offer installment plans; contact your local treasurer for details.

Appealing Your Assessment

If you believe your property’s assessed value is inaccurate, follow these steps to appeal:

• Review Your Assessment: Check your assessment notice (mailed in spring) or search records online via the Washington County Assessor’s Office.
• File an Appeal: Submit a written objection to the Board of Review by the deadline (typically within 30 days of the assessment notice). Include evidence (e.g., recent appraisals, comparable sales).
• Hearing: Present your case to the Board of Review, which may adjust your assessment if justified.
• Further Appeals: If unsatisfied, you may appeal to the Wisconsin Department of Revenue or circuit court.

For deadlines and forms, visit the Washington County website or contact the Assessor’s Office.