Local Sales/Use Tax by Address

"Hold Harmless" Tax Rates Services

Find Local Taxes by Address

The following list of electronic address database providers are currently certified by the department. Taxpayers who use these certified databases will not be liable for sales and use taxes otherwise owed to the State of Colorado and state-collected municipalities, counties and special districts if the database incorrectly designates the location of a sale, storage, use or consumption of taxable tangible personal property or services. This is the "hold harmless" provision. More information is available by watching our How to find Information on Colorado Sales & Use Tax Rates video.

Applying for Certification

Database providers interested in applying with the Department to be listed as a certified electronic address database provider need to complete the Hold Harmless Application and must successfully complete the certification process. Please email the application to dor_localgovsupport@state.co.us. See also: C.R.S. 39-26-105.3.

Participating Home-Rule Cities and Counties

Arvada, Aurora, Boulder, Brighton, Denver, Longmont, Northglenn, Silverthorne, Westminster, Wheat Ridge, and Woodland Park have enacted ordinances that hold taxpayers harmless if they rely on these certified databases.  To visit a local government webpage, see the Colorado Department of Local Affairs, Active Colorado Municipalities

Certified Electronic Address Databases

Please note that by clicking on any of these links, you will leave the Colorado Department of Revenue website and enter a privately owned website created, operated and maintained by a private business. The Colorado Department of Revenue is not endorsing its products, services, or privacy or security policies. We recommend you review the business's information collection policy or terms and conditions to fully understand what information is collected by this private business.
 
Dealr, Inc.
Pitney Bowes Software
Sovos Compliance TTR, Inc.                                   
No Free Lookup Tool
No Free Lookup Tool
Free Lookup Tool No Free Lookup Tool
Product Contact:
720-772-7706
Local Government Access Contact:
Patrick Collins: Senior Product Manager
Product Contact:
http://sovos.com/contact-us/​
860-532-0829
Product Contact:
COrates@ttrus.com
866-578-8193 or 503-472-8500      
System Identification:
dealr.tax powered by dealr.cloud
Effective Date of Certification: 
July 17, 2018
Expiration Date of Certification:
July 16, 2021
Company Information
System Identification:
GeoTAX 7.2., located at Boulder, Colorado.
Effective Date of Certification:
August 22, 2016
Expiration Date of Certification:
September 26, 2021
Company Information
System Identification:  
Sovos GTD v. 8.4+, Taxify.co
Effective Date of Certification:
July 20, 2016
Expiration Date of Certification:  
September 7, 2021
System Identification:  
TTR, Inc. – The Tax Answer Company
Effective Date of Certification: 
October 17, 2018
Expiration Date of Certification:  
October 16, 2021