Kalshi vs Polymarket — World Cup Price Gaps
The 2026 World Cup group stage opens June 11. As Kalshi and Polymarket both list match and tournament markets, the live cross-exchange gaps appear below. Before kickoff the board may be quiet — gaps open up as match markets go live.
Live World Cup Price Gaps: Kalshi vs Polymarket
Updated May 30, 11:30 PM ETWhere Kalshi and Polymarket price the same game differently right now. Two exchanges disagreeing on the same outcome is a genuine cross-exchange gap — unlike a sportsbook line, which bakes in vig (the house edge). The book's implied price is shown for reference so you can see how much wider it sits.
Gaps are the difference in implied probability between the two exchanges on the same game, ranked by symmetric KL divergence. Polymarket prices come from the latest hourly snapshot; Kalshi prices are live. Sportsbook prices are de-vigged for a fair comparison. Informational only — verify resolution terms before trading.
How we compute the gap
For each World Cupgame listed on both exchanges, we take Kalshi's live implied probability and Polymarket's latest snapshot probability for the same team, then measure how far apart they are. Games are ranked by symmetric KL divergence — a measure of how much the two price distributions disagree — and we surface the biggest gaps first. A “gap” here is the difference in implied probability between the two exchanges, in percentage points.
A cross-exchange gap is not the same as a sportsbook edge. Two exchanges disagreeing is a genuine signal; a sportsbook line sitting wider is mostly vig — the house margin baked into both sides. That's why we lead with the Kalshi–Polymarket comparison and show the book only for reference. Informational only — always verify resolution terms and liquidity before taking a position.
World Cup: Kalshi vs Polymarket FAQ
Is Kalshi or Polymarket cheaper for the World Cup?
It depends on the match and the market. The live table flags the cheaper exchange on each game once both list it. Neither exchange charges vig, so the gap is the real cross-exchange difference.
When do World Cup gaps appear?
The 2026 group stage opens June 11. Match markets fill in as games approach; before then the board can be thin. Check back closer to kickoff for live gaps.
Can you arbitrage Kalshi against Polymarket on the World Cup?
When the two exchanges price the same outcome differently enough, the gap is a genuine signal. Polymarket is geoblocked for US traders, so most US readers trade the Kalshi side; the gap still shows where the consensus sits. Verify resolution terms first.