Kalshi Leads Sports Betting Volume

Kalshi’s sports lead shows that regulated U.S. distribution matters more than crypto speed once prediction markets move from election spectacles to daily habit. Sports trading is frequent, resolves fast, and lets users recycle cash every night, which fits Kalshi’s 50 state access and fiat onboarding better than Polymarket’s offshore, crypto first setup, even while Polymarket stays stronger in politics and lower fee global trading.

• Sports became Kalshi’s core engine after the 2024 election. Internal research puts sports at about 75% of Kalshi trading, with $2B in sports volume in H1 2025, and later snapshots show roughly $1.1B monthly on Kalshi versus about $350M on Polymarket.
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• The product and money flow are simpler for mainstream U.S. users on Kalshi. A user links a bank account, trades event contracts in dollars, and Kalshi matches buyers and sellers while taking a transaction fee, instead of asking users to fund with crypto and navigate offshore access limits.
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• This is the same pattern that built modern sportsbooks. Fast resolving sports markets create repeat behavior and high capital turnover, while federal event contract status lets Kalshi operate nationally, unlike DraftKings and FanDuel which still depend on state by state approvals.
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The next phase is a fight over who becomes the default sports venue, not the default prediction market in the abstract. If Kalshi keeps compounding around everyday sports volume, it can turn a regulatory edge into a habit and liquidity edge, while Polymarket’s path is to narrow that gap by bringing its low fee model back onshore.