Check or Money Order Payments

Paying a Tax Bill

Before mailing your payment, please consider an electronic method. Using electronic funds transfer (EFT), a credit/debit card or an e-check reduces errors and processing time. Please note that applicable penalties and interest will continue to accrue while your payment is in transit and being processed. Also, be sure to visit the Tax Payment Options Page to verify whether your tax bill can be paid with a check or money order. 

If you choose to mail your tax payment:

  • Make sure your check, money order or cashier’s check is payable to the Colorado Department of Revenue
  • Be sure to include the payment coupon or payment form with your check.  Sending a payment without the proper document will cause significant delays in processing your payment, which might cause your account to be sent to collections. 
  • Do not paperclip or staple your payment to your payment coupon.  
  • Clearly write your last name, social security number (SSN) or Colorado Account Number (CAN), and tax period in the check memo area.
  • If sending a money order or cashier's check, be sure to keep the attachments or carbon copies with your tax records. You may need to use this information for tracking purposes, if your payment is lost.
  • Mail your payment to the address on specified on the tax bill. 

Payment Included with a Mailed Tax Return

If you are paying the amount owed with a tax return, simply fold your check into the form before placing it in the envelope. Do not paperclip or staple your payment to the form. Also, be sure to keep proof of payment with your tax records for future use, if needed. Mail the check and return in the same envelope to the address listed on the tax return for payments. Sending your payment and return to the incorrect address will increase processing time, which may delay any applicable refunds. Be sure to review the Contact Us By Mail web page prior to mailing your check and tax return. 

Estimated Tax Payments

If you are making estimated tax or any other advance payment, be sure to complete the payment form that is applicable to your tax type. Send your check with the form to the address listed on the form. Do no paperclip or staple the check to the form.