The Town sales tax rate is 4%

The Town's Revenue Division is responsible for licensing businesses that operate within Town and collecting the proper amount of sales tax.

Remember to file the proper tax form using the 4% rate for the Town of Castle Rock.

For filing sales taxes online, please follow the Sales Tax Returns and Instructions.

If needed, access a blank Sales Tax Return (PDF).

Sales tax returns need to be received by the Town, or postmarked, no later than the 20th of the month due. Monthly filers should submit the previous month’s sales. Quarterly filings are due April 20, July 20, Oct. 20, and Jan. 20. Annual filings are due Jan. 20.

Remember to pay your taxes on time to avoid interest and late fees.

Sales tax & business resources

• Address Locator Guide
• Affidavit of Exempt Sales (PDF)
• Castle Rock sales tax exemption list (PDF)
• Castle Rock business license closure form (PDF)