| Real Estate | ||
| Date | Events | Notes |
| Jan 01 | Assessment Date | |
| Apr - Jun | Value Notices Issued | Must be sent by June 15 |
| Jun | Appeal Deadline | 3rd Monday in June for 1st class counties |
| Jul | Appeal Deadline | 3rd Monday in July for non-1st class counties |
| Nov 01 | Tax Bills Issued | |
| Dec 31 | Tax Bills Due |
| Personal Property | ||
| Date | Events | Notes |
| Jan 01 | Assessment Date | |
| Mar 01 | PP Returns Due | Inventory exempt; St. Louis City due Apr 01 |
| May 01 | Value Notice Issued | If assessed value is different from rendered value, notice issued |
| June | Appeal Deadline | 3rd Monday in June or 30 days after notice |
| Nov 01 | Tax Bills Issued | |
| Dec 31 | Tax Bills Due |