Kalshi Set to Benefit from March Madness Tournament

March Madness has become the most active category on Kalshi. The success comes even as the NCAA continues pushing back against college sports betting on prediction markets.  

Over the first weekend of the men's and women's basketball tournaments, Kalshi users traded more than $800 million in contracts tied to tournament games, according to the company's figures. That total was nearly double the amount traded across the full three-week span of last year's tournaments, showing how sharply activity has increased on the platform. 

The tournament also helped drive another record week of trading volume at Kalshi, as prediction market apps continued to gain ground on more traditional gambling operators. Rival platform Polymarket recorded another $200 million in March Madness trading last week, adding to signs that event-contract platforms are becoming a larger force in sports wagering.  

Those figures put prediction markets on pace to compete more directly with state-regulated sportsbooks during one of the busiest betting events of the year. 

The American Gaming Association has projected $3.3 billion in legal wagers on March Madness through regulated sportsbooks this year, only a slight increase over last year's results. Against that backdrop, Kalshi's trading volumes have drawn fresh attention to how quickly these markets are expanding. 

Last week, NCAA President Charlie Baker sent a letter to the Commodity Futures Trading Commission (CFTC), reaffirming its push to introduce a temporary suspension of trading on college sports so the CFTC can implement new guardrails to protect athletes and the integrity of competitions.  

Perfect bracket offer adds visibility to tournament push 

Kalshi has used the tournament to raise its profile with a high-value bracket contest tied to the men's field. The operator is offering $1 billion to any participant who correctly predicts the outcome of all 63 games. If no entry is perfect, the leading bracket will receive $1 million instead. 

That contest has added another layer to Kalshi's March Madness growth because it focuses on one of the least likely outcomes in sports prediction. Every year, millions of fans fill out brackets for the NCAA men's tournament, but a verified perfect bracket has never been recorded. With 64 teams and 63 single-elimination games, the challenge remains defined by long odds and frequent upsets. 

Kalshi said the promotion was meant partly to show the scale of that improbability. The company described the contest as a lesson in probability, using the size of the prize to draw attention to just how difficult a flawless bracket would be. Rather than presenting a realistic path to a $1 billion payout, the offer works more as a high-profile marketing tool during the busiest stretch of the college basketball calendar. 

The promotion still includes a guaranteed prize even if no one predicts every game correctly. Kalshi said the top-scoring entry will receive $1 million if the perfect bracket goes unclaimed. It also said two education non-profits will each receive $500,000.