Kalshi, Polymarket Volume Jumps 75% To $45 Billion In June On World Cup Betting

Kalshi, Polymarket and Polymarket US recorded a combined $44.8 billion in trading volume in June, up 75% from May’s $25.66 billion. Kalshi led the growth, rising 87.4% to $31.5 billion from $16.81 billion the previous month.

Polymarket’s main non US platform brought in $10.26 billion, up 45% from $7.08 billion in May, reversing a steady decline seen from March through May. Polymarket US, the platform’s regulated arm, posted $3.04 billion in volume, up from $1.77 billion in May.

World Cup Drives Betting Surge

The jump in activity coincides with the FIFA World Cup, which began June 11. Kalshi’s World Cup winner market alone has drawn more than $832 million in bets, with about 35% backing France to win. Individual match contracts on Polymarket have each attracted between $500,000 and $2 million in volume. The tournament runs through July 19.

Platforms Face Legal Pushback In The US

Kalshi and Polymarket continue to face legal challenges from more than a dozen US states, which argue the platforms are offering unlicensed sports betting. Both companies, along with the Commodity Futures Trading Commission, maintain that federal rules allow them to offer sports-related markets regardless of state law.