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Market Notice
December 20, 2018


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ISO News and Information


Reporting ISO/RTO Costs Effective 1/1/19 Pursuant to FERC Order No. 668


The California ISO has allocated its Grid Management Charge (GMC) charge codes, administrative fees, and line/path operator agreement (LOA) charges into the required accounts effective Jan. 1, 2019. Market participants billed for ISO costs through the GMC and LOAs can report those costs pursuant to FERC Order No. 668.


Three GMC charge codes, eight administrative fees, and one LOA charge make up the ISO 2019 costs. Federal Energy Regulatory Commission (FERC) Order No. 668 requires the ISO to report ISO and Regional Transmission Organization costs using three specified FERC accounts as follows:

  • 561.4 – Scheduling, System Control and Dispatching Services
  • 561.8 – Reliability Planning and Standards Development Services
  • 575.7 – Market Administration, Monitoring and Compliance Services

The ISO has allocated its 2019 costs into the required FERC accounts. Market participants billed for the ISO costs can report these costs according to the FERC order.


To calculate each account, market participants should take the charges for each respective charge code or LOA and apply the percentages of each FERC account listed in the document titled Summary of Regional Transmission Organization Costs Effective Jan. 1, 2019. The document is available on the ISO website at


Dennis Estrada at 916-351-2235 or

April Gordon at 916-351-2162 or

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California Independent System Operator | P.O. Box 639014 | Folsom, CA 95630 | United States