state logo Colorado Department of Labor and Employment
Unemployment Insurance Employer Services
251 E. 12th Ave
Denver, Colorado 80203
Phone: 303-318-9100 (Denver-metro area)
or 1-800-480-8299 (outside Denver-metro area)

Unemployment Insurance Employer-Change-of-Business-Address Web Site

Welcome to the Colorado Department of Labor and Employment's Employer-Change-of-Business-Address Web site.

This Web site gives you the opportunity to change some of your business addresses for Unemployment Insurance (UI) purposes, such as your location and mailing addresses.   In order to use this site, you must have your Colorado Employer UI Account Number and Employer name.  If you do not have a Colorado Employer UI Account Number, please register your business at and click on the Businesses & Employers tab, then on Unemployment Insurance Premium, then on Register a new business.

Please enter your Employer name and Colorado Employer UI Account number in the following fields, exactly as they appear on the Form UITR-1, Unemployment Insurance Quarterly Report.

Employer Name (owner/corporate name)
Colorado Employer UI Account Number
(e.g., 234567.00-8)
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