What are property taxes based off of in Wisconsin

@Steve Bittorf estimated fair market value plus some formula. Every county in the state can be different. There's no simple answer to your question.

@Steve Bittorf, like @Jeff Cichocki said, every municipality sets their own rate. The basic formula is 

(total municipality expenditures) divided by (total assessed value of all property in the city) = tax rate applied to all property. 

There is a pretty big range in rates from city to city, usually 1.5 to 3.0 percent. 

Here in Milwaukee, the tax dollars go toward:

• Public Schools
• Local Technical Colleges
• Public Works
• Public Safety
• Health
• Culture & Recreation
• General Government

the taxes are calculated on the taxing authority (municipality or township) MIL Rate, per $1000 of assessed value. each township or municipality publishes their MIL rate as public record.