2013 Calendar:
| February 8 | Annual Statement of Property (ASOP) forms made available at the Division of Property Taxation website. |
| March 25 | Preliminary cost of capital study available to state assessed companies on DPT website. |
| March 26 | Cost of Capital meeting to be held at Xcel offices, 1800 Larimer St, Rm. 03G01, 1:00 p.m. |
| April 1 | ASOPs are due to the Division of Property Taxation (DPT). An extension to April 19 is granted with written or e-mailed extension request made no later than April 1.* |
| April 5 | Final cost of capital study available to state assessed companies on DPT website. |
| April 19 | ASOPs from companies which have been granted an extension are due to the DPT.* |
| June 7 | Courtesy Notice of Value (NOV) sent to state assessed companies. |
| June 10-21 | Informal hearings scheduled through June 21. |
| July 1 | First NOV sent to state assessed companies and counties. |
| July 15 | Last day for state assessed companies and counties to file for protest. |
| July 19 | Formal protest hearings scheduled no later than July 19. |
| August 1 | Final NOV sent to state assessed companies and counties. |
| August 31(Saturday postmark) | Last day to file with the Board of Assessment Appeals (BAA) or Denver District Court. |
* Excel format files can be e-mailed back, but a hard copy return of at least the first page, with a signature, is required. The mandatory late filing penalty is $100 per day, to a maximum of $3,000