TLDR Kalshi is offering a $1 billion prize for a perfect bracket prediction across all 63 men’s NCAA tournament games The odds of winning are about 1 in 120 billion, but the contest is generating massive buzz and media coverage Kalshi carefully avoids using the trademarked term “March Madness” after being scolded by the NCAA in the past The American Gaming Association says Kalshi is the most visible sports betting brand by digital ad impressions, with 5.2 billion per year The 2026 NCAA Tournament is the first where sportsbooks can officially use “March Madness” branding through a Genius Sports deal
Prediction market Kalshi is making headlines this week with a $1 billion bracket contest tied to the NCAA men’s basketball tournament. The company cannot officially associate itself with the NCAA or its trademarked events, but the massive prize is doing the marketing work on its own.
Kalshi is offering the $1 billion grand prize to anyone who correctly picks the winner of all 63 games in the men’s tournament. The contest is one of more than a dozen bracket challenges available across major sports websites and sportsbooks this March.
No other contest is offering a prize anywhere close to 10 figures.
The odds of actually winning are almost nonexistent. Based on theoretical odds of -200 for every game, Kalshi estimates the chances at about 1 in 120 billion. That means you would need to fill out one bracket every second for roughly 3,800 years to expect a perfect one.
“Your odds are low… but they’re not zero,” the company says in its promotion.
While the billion-dollar prize is unlikely to be claimed, Kalshi is also offering $1 million to the highest scorer in the contest. The company is donating another $1 million to charity and math scholarships,