Sales Tax Returns and Instructions

Sales tax returns

We are excited to announce that the Town of Castle Rock has a new online sales tax filing system! The new system features a user-friendly portal that you can access from all devices, including home devices.

The new system offers more payment options. We accept ACH debit (eChecks), credit cards and debit cards.

Access the Town of Castle Rock | Sales Tax Portal, and follow the prompts.

Please note, you will need to use Chrome as your browser for the sales tax filing portal. We have included instructions for installing Chrome.

If needed, please print the Town of Castle Rock Sales Tax Return (PDF) and return the form via mail.

If you have any questions, please let us know. 

For business license inquiries, email us

For sales tax questions, email us.

Lodger's tax

Castle Rock voters approved a lodger's tax in the Nov. 2021 election. Beginning Jan. 1, 2022, a lodging tax of 6% will be imposed on all sales of lodging. “Lodging" means the transaction of furnishing rooms or accommodations by any person, partnership, limited liability company, association, corporation, estate, receiver, trustee, assignee, lessee, or person acting in a representative capacity or any other combination of individuals by whatever name known to a person who for a consideration uses, possesses, or has the right to use or possess any room in a hotel, apartment hotel, lodging house, motor hotel, guesthouse, guest ranch, trailer coach, mobile home, auto camp, or trailer court and park, under any concession, permit, right of access, license to use, or other agreement, or otherwise. "Lodging" shall not include the transaction of furnishing rooms or accommodations to any natural person who is a permanent resident of any hotel, apartment hotel, lodging house, motor hotel, guesthouse, guest ranch, trailer coach, mobile home, auto camp, or trailer court or park and who enters into or has entered into a written agreement for occupancy of a room or accommodations for a period of at least thirty (30) consecutive days during the calendar year or preceding year. (Ord. No. 2021-015 , § 1, 8-17-2021/11-2-2021; Ord. 95-30 §3, 1995; Ord. 94-27 §2, 1994; Ord. 92-17 §2, 1992; Ord. 89-33 §1, 1989; Ord. 88-06 §1, 1988; Ord. 9.09 §4.1, 1976)

Please note, this tax is assessed in addition to the sales tax rate. 

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.