Kalshi pays wrong side $18.6M, claws back after Michigan comeback
Kalshi prematurely settled its Western Michigan versus Michigan college football market before the game ended on September 6, paying $18.6 million to traders who backed the losing side. Michigan completed a comeback victory on a last-second Hail Mary, leaving correct-outcome traders unpaid while Kalshi clawed back the mistaken payouts. User complaints surfaced on social media about the handling of the reversal. The error struck during Kalshi's opening weekend of college football event contracts.
The $18.6 million payout error damages Kalshi's credibility with traders at the exact moment it is fighting for sports betting market share. Novig has already posted $125 million in first-week volume, so traders with size now have a direct comparison for platform reliability. Kalshi must convince users that its settlement mechanics can handle live-game uncertainty, or risk losing order flow to venues with deeper liquidity and cleaner execution.
The incident gives state attorneys general fresh material in Michigan and other jurisdictions where Kalshi's legal standing is already contested. Platforms that survive September will be those that deliver operational competence, not just contract variety. Kalshi's engineering and risk teams now face a rebuild deadline before Week 2 kickoff.