Wisconsin

state characteristics

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
RE Rendition Required: No
PP Rendition Required: Yes
Consultant Certification or Licensing: Not Required
Real Estate Taxable? Yes
Personal Property Taxable? Yes
Inventory Taxable? No

key tax dates – real estate

Assessment Date: Jan 1  
Appeal Deadline: May – Oct

Apr 28

May 15 

Depending on jurisdiction

City of Madison (Last Fri. of April)

City of Milwaukee
(3rd Monday of May)

Tax Bills Issued: Dec 1  
Tax Bills Due: Jan 31  

key tax dates – personal property

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