To sign up for Square’s online payroll services in Colorado, you must be registered with the Colorado Department of Revenue (DOR) and the Colorado Department of Labor and Employment so we can pay and file your state taxes.

Agency Required Tax Information Format
Colorado Department of Revenue (DOR) Colorado Account Number 00000000 (8 digits)
Colorado Electronic Funds Transfer (EFT) Number 3710000000 (10 digits)
Colorado Filing Frequency Weekly, Monthly, or Quarterly
Colorado Department of Labor and Employment Colorado UI Employer Account Number 000000.00-0 (9 digits)
Colorado UI Total Combined Rate X.XX%

Colorado Tax Account Numbers

Colorado Account Number and Filing Frequency

  • If you are a new business, register online. You will only need to enter the first 8 digits of your account number.
  • If you are already registered with the Department of Revenue, you can find your Colorado Account Number and Filing Frequency online or by contacting the CO Department of Revenue at 303-205-8333.

Colorado Electronic Funds Transfer (EFT) Number

  • If you have not yet registered to make electronic payments, register online for an EFT Number. Please make sure you are applying to make payments through ACH Credit. The EFT Number will begin with 371.
  • If you already have an EFT Number, you can find it online or by contacting the CO Department of Revenue at 303-205-8333.

Colorado Unemployment Insurance Employer Account Number

  • If you are a new business, register online to retrieve your CO UI Employer Account Number.
  • If you already have a CO UI Employer Account Number, look this up online or find it on the Unemployment Insurance Rate Notice mailed by the CO Department of Labor and Employment. If you are unsure, contact the agency at 303-318-9100 or cdle_employer_services@state.co.us.

Colorado Occupational Privilege Tax

City of Aurora Account Number

  • If you are a new business, register online to receive your Aurora Account Number.
  • If you are already registered with the City of Aurora, you can retrieve your account number by contacting the agency at 303-739-7800.

City of Denver Account Number

  • If you are a new business, register online to receive your Denver Account Number.
  • If you are already registered with the City of Denver, you can find your account number online or retrieve it by contacting the agency at 720-913-9400.

City of Glendale Account Number

  • If you are a new business, submit a Business Registration form to receive your Glendale Account Number.
  • If you are already registered with the City of Glendale, you can retrieve your account number by contacting the agency at 303-639-4706.

City of Greenwood Village Account Number

  • If you are a new business, apply for an Occupational Privilege Tax License to retrieve your Greenwood Village Account Number.
  • If you are already registered with the City of Greenwood Village, you can retrieve your account number by contacting the agency at 303-486-8299.

Employer Exemption from Occupational Privilege Tax

Religious and charitable organizations may be exempt from the employer (business) portion of Occupational Privilege Tax. You can find more details on each city’s exemption rules here:

Sheridan Occupational Privilege Tax

Square Payroll will calculate and withhold Sheridan Occupational Privilege Tax (OPT) from your employees but you will need to file and pay this tax to the City of Sheridan manually. We’ll provide you with all the information you’ll need at the time of filing. Please note that Square Payroll will file all other state taxes including Colorado state income tax and unemployment insurance (UI) tax for you.

Colorado Payroll Tax Details

Square Payroll processes the following per the frequency below to the listed state agencies:

Agency Filing Frequency
Colorado Department of Revenue (DOR) Wage Withholding Tax Return (DR 1094) After Every Pay Run
Wage and Tax Statement (W-2) Annually
Colorado Department of Labor and Employment Unemployment Insurance Payment Quarterly
Quarterly Report of Wages Paid and Premiums Owed (UITR-1) Quarterly
State Directory of New Hires New Hire Report As Needed

Colorado City-Level Payroll Tax Details

Agency Filing Frequency
Denver Department of Finance Denver Occupational Privilege Tax Return Monthly
Aurora Tax & Licensing Division Aurora Occupational Privilege Tax Return Monthly
Glendale Tax Department City of Glendale Occupational Privilege Tax Return Monthly
City of Greenwood Village Greenwood Village Occupational Privilege Tax Return Monthly

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