Overview: If you're a new company or have an employee working out of Colorado and need to register for unemployment tax, that can be done through various official Colorado websites.
Type of Tax:
Withholding Tax
State Unemployment Insurance (SUI) Tax
Paid Family and Medical Leave program
Occupational Privilege Tax (OPT) - Local Taxes
Third-party Administrator (TPA) access
Employers withholding Colorado state income are required to register with the Colorado Department of Revenue as a "withholding tax agent."
Upon receipt of the application, the Colorado Department of Revenue will open a withholding tax account and assign an 8-digit account number. There is no fee for the account. And there is no renewal requirement for a withholding tax account.
Apply for Colorado Withholding Tax Number
Forms W-2 Employer
Located in the State of Colorado
If your business is located in the State of Colorado, register through MyBizColorado or complete Form CR 0100, Colorado Sales Tax and Withholding Account Application.
When completing Form CR 0100, complete sections A, B, D, E, F, and G of the form.
Located outside of the State of Colorado
If your business is located outside of the State of Colorado, complete Form CR 0100, Colorado Sales Tax and Withholding Account Application, sections A, B, D, E, F, and G.
1099 Issuers
To apply for a 1099 withholding account, complete Form CR 0100, Colorado Sales Tax, and Withholding Account Application. Indicate in Box D that a 1099 account is needed. Allow 4 - 6 weeks for processing.
Tax Agency:
Apply for Colorado SUI Tax Number
To register a business for Colorado SUI tax:
Paper. Complete paper application, Colorado Form UITL-100, Application Form Unemployment Insurance Account and Determination of Employer Liability. Or,
Online. Register using the CDLE online application, MyBizColorado.
Tax Agency:
Apply for Colorado FAMLI Tax Number
To register a business for Colorado FAMLI tax:
From the My FAMLI+ Employer webpage, select “log into My FAMLI+ Employer”
Under Sign In, select “create an account”
This will direct you to a secure login.gov site where you will enter your email address you wish to use for this account
Go to your email and confirm your email address and you will then be directed to set up a password and authentication method
Complete registration
For additional assistance, a How to Register video is available on their website
Aurora, Colorado Occupational Privilege Tax (OPT)
The Aurora OPT is administered by the City’s Tax and Licensing Division. To obtain an account number, an employer is required to register with the Aurora Tax and Licensing Division for a business license. There is a $17 application fee.
Online. An employer can submit an application online through the Aurora Tax Portal.
Denver, Colorado Occupational Privilege Tax (OPT)
The Denver OPT is administered by the City’s Department of Finance, Treasury Division.
To obtain an account number, an employer is required to register with the City of Denver. An employer can register electronically or by mail.
Online. An employer can register online through Denver eBiz Tax Center. Or,
Paper. Or, an employer can register by completing and mailing in the Denver Application for Denver Sales, Use, Lodger’s Tax License and/or Occupational Tax Registration
Glendale, Colorado Occupational Privilege Tax (OPT)
The Glendale OPT is administered by the City’s Tax Department. There is a $10 business registration fee (required by all). To obtain a tax account number, an employer is required to register with Glendale. An employer can register electronically or by mail.
Online. An employer can register online through the Glendale Online Licensing & Tax System.Or,
Paper. An employer can complete and mail the Glendale Business Registration and Sales Tax Application (PDF).
Greenwood Village, Colorado Occupational Privilege Tax (OPT)
The Greenwood OPT is administered by the City’s Tax Department. To obtain an account number, an employer is required to complete the online license application. The Village imposes a $10 one-time application fee. Employers can complete and mail the Greenwood Tax License Application.
Sheridan, Colorado Occupational Privilege Tax (OPT)
The Sheridan OPT is administered by the City’s Finance Department. To obtain an account number, an employer is required to register online through MUNIRevs, the City’s online business licensing and tax collection system. MuniRevs Tutorial (PDF)
Log in to your account by visiting the My FAMLI+ Employer Portal web page.
Under “Manage My Accounts”, select “Manage Accounts”.
From the “Accounts” page, select your FAMLI employer account
Scroll down to the section titled, Third Party Administrator
Click Add
Under “Select Account”, you will search for and select “Check Technologies, Inc.”
Enter the start date (This should be the first day of the quarter which you are enrolling)
Save and select, “Yes, add TPA”
For step-by-step instructions, see the Employer User guide located under User Guides and Additional Resources
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