MISO Summer Capacity Auction Prices Remain Elevated But Lower Than Prior Year: Non-Summer Prices Drop Steeply

April 29, 2026

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Copyright 2026 EnergyChoiceMatters.com
Reporting by Paul Ring • ring@energychoicematters.com

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The Midcontinent ISO posted results from the 2026-27 Planning Resource Auction (capacity auction)

For zones of relevance to retail energy, 2026-27 capacity auction pricing was as follows by season ($/MW-day):

MISO 2026-27 PRA

Summer
Zone 4 (Ameren Illinois)           $424.30
Zone 7 (Michigan: DTE, Consumers)  $424.30
Zone 2 (Michigan Upper Peninsula)  $424.30
Zone 3 (MidAmerican Illinois)      $424.30

Fall
Zone 4 (Ameren Illinois)            $33.92
Zone 7 (Michigan: DTE, Consumers)   $33.92
Zone 2 (Michigan Upper Peninsula)   $33.92
Zone 3 (MidAmerican Illinois)       $33.92

Winter
Zone 4 (Ameren Illinois)            $35.97
Zone 7 (Michigan: DTE, Consumers)   $35.97
Zone 2 (Michigan Upper Peninsula)   $35.97
Zone 3 (MidAmerican Illinois)       $35.97

Spring
Zone 4 (Ameren Illinois)             $7.61
Zone 7 (Michigan: DTE, Consumers)    $7.61
Zone 2 (Michigan Upper Peninsula)    $7.61
Zone 3 (MidAmerican Illinois)        $7.61

For comparison, the Summer 2025 Zone 4 price had been $666.50 per MW-day

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