Sales tax returns for the Town of Castle Rock can be filed via paper form or through our online filing system. Please print the Town of Castle Rock Sales Tax Return and return the form.
If you are a first-time filer, or you need your password reset, please contact the Sales Tax Division at 303-660-1397.
Special event sales tax
As of July 1, 2003, the promoter of a special event held in the Town of Castle Rock is required to hold a business license and remit taxes on the behalf of all individual vendors that attend the event. Individual vendors have the option of applying for their own sales tax licenses, but that is not required.
An event is considered a special event when three or more vendors are organized to sell items for up to seven consecutive days. Vendors who hold events on consecutive weekends do not fall under these provisions of a special event. However, they may elect to do so and have the promoter license and remit taxes on the behalf of all individual vendors.