America's Property Tax Advisor

POER's Chicago office represents clients' properties in the State of Wisconsin.


This information is deemed to be a reliable calendar of specific property tax event dates that are updated quarterly and throughout the year as changes are known. However, it is not guaranteed and some dates and/or jurisdictions are not listed.


For POER's local office contact information for this state, visit our locations page.

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Assessment Ratio: 100% 

Note: Local assessors appraise property at 100%. The State Department of Revenue performs a ratio study and publishes their results on each individual tax bill. The majority of jurisdictions are actually between 90-100%.
Fiscal Tax Year: 01/01 – 12/31
Valuation Authority: City
Collection Authority: City, Village or Town
Level One Appeal Name: Cities of Madison & Milwaukee: Board of Assessors
All others: City/Town/Village Board of Review
Consultant Certification/Licensing: Not Required
Real Estate Taxable? Yes
RE Rendition Required: No
Non-Disclosure State? No
Personal Property Taxable? Yes
PP Rendition Required: Yes
Inventory Taxable? No


Assessment Date: Jan 1  
Appeal Deadline: Apr - Sep Depending on jurisdiction
  Apr 30 City of Madison
(Varies based on value publication)
  May 16 City of Milwaukee
(3rd Monday of May)
Tax Bills Issued: Dec 1  
Tax Bills Due: Jan 31  


Assessment Date: Jan 1  
Tax Returns Due: Mar 1 Inventory exempt
Tax Bills Issued: Dec 1  
Tax Bills Due: Jan 31