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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.

Related Documents


Rate changes were processed to incorporate the annual revenue requirements and/or divisor updates of Attachments O/GG/MM/ZZ for Transmission Owners (TOs) using a forward-looking Attachment O. This rate update also includes changing the MISO base ROE to 9.88% for all TOs. Manitoba Hydro (MHEB) provided revised rates for Schedules 1, 2, 7, 8, and 11.

In addition, these updates were also incorporated:

Schedule 2

  • Per Docket ER19-1488, AB Brown CT Units 3 and 4 were added to the Vectren/SIGE Transmission Pricing Zone (TPZ).
  • Per Docket ER18-2280, the revenue requirement for Marshalltown Generating Station was reduce in the ITC Midwest TPZ.

Schedules 7,8 & 9

  • Per Docket ER20-175, OTP corrected a pre-2018 error which also affects Schedule 26.
  • Per Docket ER20-176, OTP adds an adjustment line on Attachment O allowing prior year adjustments.
  • Per Docket ER20-159, Pioneer is allowed recovery of pre-commercial costs
  • Per Docket ER19-956, ITCM recognition of Intangible Assets as Transmission
  • Per Docket EL14-12, reducing MISO base ROE to 9.88% for all MISO TOs including historical test year TOs.

 Schedule 26, 37, & 38

  • Newly approved MTEP19 projects added.  This is also the second year of the phase-in of a portion (25.0%) of the MISO South (RTOR) average rate being charged on transactions exiting the MISO South system.

 Schedule 26-C & 26-D

  • Cost recovery for TMEPs (Targeted Market Efficiency Projects) to reflect updates from MISO and PJM.

 The overall impact on MISO system rates follows:


  • Schedule 1:                            0.83% decrease
  • Schedule 2:                             0.38% increase
  • Schedules 7, 8, & 9:           0.99% decrease
  • Schedule 26:                       10.18% decrease
  • Schedule 26A:                        5.70% increase
  • Schedule 33:                           0.33% increase
  • Schedule 45:                          6.27% increase


  • Schedule 1:                         32.30% Increase
  • Schedule 2:                         10.81% Decrease
  • Schedule 7:                           8.06% Decrease
  • Schedule 8:                           8.06% Decrease
  • Schedule 11:                    15.27% Increase

These changes are effective January 1, 2020.

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