All 72 Wisconsin counties and county equivalents. 2 have been checked against the county's own schedule; the rest follow the state schedule below.
| Instalment | Due | Notes |
|---|---|---|
| Full payment or first installment | February 1, 2027 | Full payment is due January 31; municipalities that offer installments take the first installment by the same date. |
| Second installment | August 1, 2027 | Where an installment option is offered, the second installment is due July 31. |
Wisconsin property tax is billed and collected county by county, so the collector — not the state — issues the bill. State law sets January 31 as the default, but local governments may adopt different installment schedules and some allow more than two payments.
CountyTaxDates is an independent reference and is not a government agency. Deadlines change and exceptions apply — always confirm with your county treasurer using the official link on this page. Nothing here is tax, legal or financial advice.