Register in Colorado
Colorado tax agency
You will need to register with these agencies in order for Gusto to file and pay your taxes.
- Colorado Department of Revenue
- Colorado Department of Labor and Employment
- Local Occupational Privilege Tax (OPT) Agencies
Register an existing company
The Colorado Department of Revenue will issue you a withholding account number. You can check your previous Colorado quarterly returns (form DR 1094) for this information. It will be an 8-digit ID number. Some documentation includes trailing digits (i.e. 12345678-003-WTH). Please enter only the first 8 digits (12345678) and no trailing digits (003-WTH). Need help? Call the Colorado Department of Revenue at (303) 238-7378.
You can find your current unemployment account number (XXXXXX.XX-X) and tax rate by referring to your most recent Notice of Employer's Tax Rate (Form UITR-7). Need help? Call the agency at (800) 480-8299.
If you have employees working in Denver, Aurora, Sheridan, Glendale, or Greenwood Village you may be liable for OPT. You can find your OPT account number and deposit schedule on a notice from your local agency. For Denver OPT please make sure the agency is aware you are using a third party service for payroll and you will need to be a monthly depositor.
Register a new company
If you have employees working in Denver, Aurora, Sheridan, Glendale, or Greenwood Village you may be liable for OPT.
Occupational Privilege Tax (OPT) is a head tax that includes both an employee and employer tax . Employees making over a threshold amount (varies per agency) a month are taxed per month and employers are also taxed per month for each employee. The employer tax per employee applies even if you do not run payroll.
To get a Denver OPT account number, register a new business here or fill out and mail in an application that can be accessed online here. Please make sure to note that you are using a third party service for payroll as the agency will need to assign you a monthly deposit schedule. Learn more about how taxation for Denver OPT works.
To get a Sheridan OPT Business License Account Number and learn more about how this tax works, please register your business with the city.
To get a Glendale OPT account number and learn more about how this tax works, please register your business with the city.To get a Greenwood Village OPT account number and learn more about how this tax works, please register your business online with the city.
Troubleshoot Department of Revenue authorization issues
Some agencies require special authorization for Gusto to pay or file your taxes.
To ensure successful authorization, please verify that you have added the ‘withholding’ tax type to your account and that the following information you have entered into Gusto matches what is on file with the Colorado Department of Revenue:
- Official company name/address
- FEIN - Federal Employment Identification Number
- Withholding Account Number
If Gusto is having trouble gaining access to your account, please verify that the above information matches exactly what the agency has on file by giving them a call at (303) 238-7378.