Welcome to the Group 1 Software Colorado Local Sales and Use Tax Rate Locator. This site allows Colorado businesses to determine local tax jurisdictions and tax rates based on address inputs.  While other sites charge a fee for this service, Group 1 Software is pleased to make this site available for no charge to Colorado businesses. 

CODOR rates are updated on January 1 and July 1 each year.

By registering with the Centrus CO DOR site, you will have access to the Sales Tax Rate Locator.  The registration process consists of a few simple questions. We take privacy issues very seriously. Information collected in the registration process is never shared outside of Group 1 Software..

For new registrants: Upon completion of the registration process, you will be sent a confirmation email at the provided email address.  Using the link provided in this email will activate your user account.

For any questions concerning this site, please contact us at Co_Tax@g1.com