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Transmission Settlements and Pricing

The Monthly Transmission Settlements process financially settles Transmission Customers’ use of the MISO transmission system and our mandated, non-competitive Ancillary Services. Customer charges for transmission and Ancillary Services are calculated based upon the FERC-approved Tariff, and collected funds are distributed to Transmission Owners and providers of the mandated Ancillary Services. 

Transmission Settlements follows a calendar-month billing cycle by which MISO determines what charges Transmission Customers have incurred and the distribution of revenue to Transmission Owners and/or generators.  Customers also may count on us for technical assistance and support on MISO Transmission rate-related matters. Our processes provide non-discriminatory reviews of Attachments O, GG, MM, SS, and ZZ submissions annually.


ROE Complaint/Resettlement Update

On November 21, 2019 FERC issued Opinion 569 (ROE Docket EL14-12) which lowers the base ROE from 10.32% to 9.88%, and requires refunds for 2 periods: #1) 11/12/13 - 02/11/2015 & #2) 09/28/16 – 11/21/19.  Materials related to the Resettlement can be located below.

TO Matrix of ROE Refund Applicability

Related Documents


 Rate changes were processed for the following items:


Schedule 2


  • Per Docket ER21-1794 White Oak Wind (FPLP)  was added to Zone 3A.


  • Per Docket ER21-1662 Georgetown GT 1, Georgetown GT 4, Harding Street GT 1, Harding Street GT 2, Harding Street GT 4, Harding Street GT 5, Harding Street GT 6, Harding Street Steam 5, Harding Street Steam 6, Harding Street Steam 7, Petersburg Steam 2, Petersburg Steam 3 and Petersburg Steam 4 (IPL) were added to Zone 11.


  • Per Docket ER 21-1622 Ashtabula 1 Wind, Astoria Station, Big Stone Plant, Coyote Station, Jamestown Units 1 and 2, Lake Preston, Langdon Wind, Luverne Wind, Merricourt Wind Energy Center, and Solway (OTP) were added to Zone 18.


  • Per the Attachment Y Grand Tower (SIGC) was removed from Zone 3A with a suspension date effective July 1, 2021.


  • The MISO Schedule 2 rate increased by 2.01%.


These changes are effective July 1, 2021.


Attachments, Schedules and TO Data

Transmission rates are effective as of the date of their posting and will not reflect any retroactive adjustments due to FERC Orders or any other reasons.

General Documents