America’s Premier Competitive Power Company
... Creating Power for a Sustainable Future


Supplier information

Doing Business with Calpine


As one of the nation’s largest and cleanest power producers, Calpine is committed to environmental responsibility, both for the company and our suppliers. Calpine purchases a broad range of products and services to keep our facilities running efficiently and cleanly.

safety and integrity at calpine

Calpine's commitment to safety and integrity – two of our core values – includes holding our suppliers to the same high standards we apply to our own operations.

  • We make purchasing decisions based on many factors, including a supplier’s previous safety records. we also actively monitor our suppliers’ behavior at all of our locations to ensure that they maintain Calpine safety standards.
  • The integrity of our suppliers is also of great importance to Calpine. For more details, please review our Supplier Code of Conduct.

supplier code of conduct

calpine’s purchasing methodology

Calpine has a center-led procurement practice where purchasing decisions are made at the business-unit level based on research and guidance provided by its corporate supply chain department. Calpine supply chain experts identify and qualify suppliers across various purchasing categories to best fulfill the needs of our energy facilities and offices nationally and regionally.


In late 2023, Calpine implemented Coupa, a cloud-based purchasing and payment system that streamlines our shared workflow – all free of cost for our suppliers. Registration with Coupa is a requirement for all suppliers to transact with Calpine.


  • A centralized location for doing business with Calpine.
  • Ability to view orders, receive purchase orders and submit invoices.
  • Convenient anytime visibility into the status of orders, invoices and payments.
  • Online catalogs to increase visibility of supplier goods and services for Calpine to purchase.
  • Easy access to Calpine sourcing events.
  • A messaging center to communicate with Calpine partners.
  • Faster payment of invoices.



All new Calpine purchase orders will be sent electronically to suppliers through the CSP. Suppliers will send all invoices to Calpine though the CSP, supplier actionable notifications (SAN) or cXML. These are the most efficient methods to submit invoices, allowing Calpine to expedite payment in accordance with contract terms.

Invoicing Methods

  • CSP: Suppliers create invoices directly from their purchase orders in the CSP with the click of a button, allowing them to manage all invoices and POs and view payment status. This is the easiest and most efficient method for suppliers seeking payment.
  • SAN: Suppliers create invoices from a PO email, as well as the ‘create invoice’ webpage. Suppliers cannot see payment status via SAN and will need to log into the CSP to view invoices and POs.
  • cXML: Suppliers who receive high volumes of purchase orders from Calpine will send cXML invoices directly to Coupa. Calpine has already identified and connected with these impacted suppliers.
  • Suppliers who are unable to submit an invoice through any of the above options are asked to contact .



1. Is my company required to register in Coupa to transact with Calpine?

Yes. As of October 2023, registration with Coupa is a requirement for all suppliers to do business with Calpine.

2. How does my company enroll in Coupa?

All suppliers were invited to enroll in Coupa in late 2023. Suppliers who did not receive an invitation or were unable to enroll are encouraged to reach out to for assistance.

3. Will Calpine provide supplier training to use Coupa?

Calpine routinely hosts training sessions for suppliers and will continue to provide training directly with those suppliers who make requests. Resources have been posted above for reference; however, suppliers are encouraged to reach out to their Calpine supply chain representative or for additional support.

4. Where can my company go for more information about Coupa?

Click here to learn more about Coupa.

5. What does it cost to join Coupa?

Coupa is FREE of charge for suppliers.

6. Why should my company join Coupa?

There are many reasons to enroll in Coupa. First, your company will retain the ability to do business with Calpine going forward. Your company will also have the ability to generate invoices, view payment status and maintain your supplier information (i.e., name, address, key contacts) via the Supplier Information Management (SIM). As important, your invoices will be paid on time and in accordance with agreed-upon terms.

7. What if my company is already registered with Coupa?

While your company may already be a registered user of Coupa, you will still need to accept Calpine’s invitation to connect. After connecting with Calpine, your company will receive a Supplier Questionnaire which you will need to complete.

8. What if I’m having issues connecting to Coupa?

Please contact Coupa’s supplier support team for assistance by clicking the upper right-hand ‘Help’ link on the Supplier portal or by emailing at

9. What are Calpine’s payment terms?

Calpine’s standard payment terms are net 45. However, there are some acceptable shorter terms that include a discounted amount/percentage for suppliers requesting payment prior to the standard net 45.