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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.

Transmission Owner Loss Data  

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Find historical rates on OASIS

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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.


Transmission rate changes were processed to incorporate the Annual Updates of the historical Transmission Owners, which includes updating the Attachments O and GG.  The following schedules changed: 1, 2, 7, 8, 9, 26, 33, 37, 38, 41, 42-B, and 45.  

In addition to divisor and revenue requirement updates, other changes reflected in the rate update include the following: 

  • Schedule 2
    • In the ATC-WEC TPZ, generator-specific revenue requirements were approved for 8 generators in Docket ER18-829.
    • In the ATC-WPL TPZ, the Glacier Hills generator was also approved in Docket ER18-829.
    • In the ITCM TPZ, the ML Kapp and Red Cedar generators were retired as addressed in Docket ER18-1250
    • In the NIPSCO TPZ, Bailly Units 7 & 8 were retired as addressed in Docket ER18-1242.
    • In the Duke Indiana TPZ, the Connersville and Miami Wabash units were retired as addressed in Docket ER18-1196.
    • In the Entergy Mississippi TPZ, the Baxter-Wilson #2 and Rex Brown #3 units were retired as addressed in Docket ER18-1703.
    • In the NSP TPZ, the Red Pine Wind generators' revenue requirement was reduced per the settlement in Docket ER18-563. 

The overall impact on MISO system rates follows: 

  • Schedule 1:                           1.46% increase
  • Schedule 2:                           1.91% increase
  • Schedules 7, 8, & 9:           2.66% decrease
  • Schedule 26:                        0.01% increase
  • Schedule 33:                        0.25% increase
  • Schedule 45:                       0.25% increase  

These changes are effective June 1, 2018.

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