| February 7 | Annual Statement of Property (ASOP) forms made available at the Division of Property Taxation website. |
| March 20 | Preliminary cost of capital study available to state assessed companies on DPT website. |
| TBA | Cost of Capital meeting - TBA |
| April 1 | ASOPs are due to the Division of Property Taxation (DPT). An extension to April 22 is granted with written or e-mailed extension request made no later than April 1.* |
| TBA | Final cost of capital study available to state assessed companies on DPT website. |
| April 22 | ASOPs from companies which have been granted an extension are due to the DPT.* |
| June 5 | Courtesy Notice of Value (NOV) sent to state assessed companies. |
| June 5-19 | Informal protest hearings scheduled through June 22. |
| July 1 | First Notice of Valuesent to state assessed companies and counties. |
| July 15 | Last day for state assessed companies and counties to file for protest. |
| July 20 | Formal appeal hearings scheduled no later than July 20. |
| August 1 | Final Notice of Valuesent to state assessed companies and counties. |
| August 31 | Last day to file with the Board of Assessment Appeals (BAA). |
| September 6 | Last day to file with the Denver District Court. |
*The mandatory late filing penalty is $100 per day, to a maximum of $3,000.