Sales Tax Returns and Instructions

Sales tax returns


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.

All individual vendors must apply for a license with the State of Colorado.


Event forms

  • Promoter information - General information for special event promoters.
  • Vendor information letter - Individual vendor information letter to be handed out by the promoter to all individual vendors.
  • Vendor list - Town must receive this at least two days in advance of the event.
  • Vendor sales tax worksheet - Individual vendor sales tax resale sales documentation form and sales tax worksheet to be handed out by the promoter to all individual vendors.