| January 1 | Assessment Date | All property is assessed as it existed on this date. |
| January 31 | Property Taxes Due - First Installment | The first installment of property taxes is due to the Rock County Treasurer. |
| March 1 | Statement of Personal Property Due | Form PA-003 must be received by the Assessor. |
| March 1 | Property Tax Exemption Request Due | Form PR-230 must be received by the Assessor. |
| March - June | Statement of Assessment | Assessment notices are mailed if the assessed value on a property changed from one year to the next. |
| March - June | Open Book | The assessor will hold an open book session to meet with residents. |
| May - September | Board of Review | Must meet once within a 30-day period beginning the 2nd Monday in May. |
| July 31 | Property Taxes Due - Second Installment | The second installment of property taxes is due to the Rock County Treasurer. |
| August 15 | Equalized Values Established | Set by the Wisconsin Department of Revenue. |
| December | Tax Bills | Tax bills are required to be mailed by the third Monday in December. |