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Live
Markets 127694
Platforms 2
Active Arbs 66
Volume $9.1B

Polymarket vs Kalshi Arbitrage Scanner

Live cross-platform price discrepancies, net of estimated fees. • LIVE · updated Jun 11, 2026 13:02 UTC

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Live opportunities
66
Avg spread
1389 bps
Biggest spread
7917 bps
Markets scanned
127694

Cross-platform arbitrage exists when the same real-world event is priced differently on two prediction markets. Buy on the cheaper venue, sell on the more expensive one, lock the spread regardless of outcome. All spreads below are net of estimated platform fees (~2% Polymarket taker, ~1.5% Kalshi). Run your own numbers →

Cross-Platform 66
Overround 1024
Cross-Market 0
Market Platforms Type Direction Arb (bps) Net Profit ROI Volume
Will "Toy Story 5" score at least 80 on the Rotten Tomatoes Tomatomete...
Poly Kalshi
entity BUY K → SELL P 7917 79.18¢ 416.74% $108
KBO: Doosan Bears vs. Lotte Giants
Poly Kalshi
entity BUY K → SELL P 7206 72.07¢ 277.19% $8K
WHOOP IPO before 2027?
Poly Kalshi
entity BUY P → SELL K 6690 66.90¢ 223.00% $346
Will "The Odyssey" score at least 90 on the Rotten Tomatoes Tomatomete...
Poly Kalshi
entity BUY P → SELL K 3386 33.86¢ 54.61% $1
Will "Supergirl" score at least 80 on the Rotten Tomatoes Tomatometer?
Poly Kalshi
entity BUY K → SELL P 2611 26.11¢ 35.77% $28
Will world GDP growth be 3.1% in 2026?
Poly Kalshi
entity BUY K → SELL P 2548 25.48¢ 34.53% $470
Will world GDP growth be 3.0% in 2026?
Poly Kalshi
entity BUY K → SELL P 2486 24.86¢ 33.42% $481
Lokomotiv Kuban vs. BC Zenit
Poly Kalshi
entity BUY K → SELL P 2374 23.74¢ 32.93% $16K
Arka Gdynia vs. Dziki Warszawa
Poly Kalshi
entity BUY K → SELL P 2271 22.71¢ 31.07% $2K
Will Sam Altman be TIME Person of the Year 2026?
Poly Kalshi
entity BUY K → SELL P 2052 20.52¢ 26.14% $60
Will Takumi Kanaya finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1999 19.99¢ 25.14% $0
Will Karl Vilips finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1999 19.99¢ 25.14% $6
Will Trace Crowe finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1999 19.99¢ 25.14% $0
Will Daniel Brown finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1999 19.99¢ 25.14% $1
Legia Warszawa vs. Basket Zielona Gora
Poly Kalshi
entity BUY K → SELL P 1962 19.62¢ 25.78% $8K
Will Matthieu Pavon finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1901 19.01¢ 23.61% $0
Will Sam Ryder finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1896 18.96¢ 23.55% $0
Will Kevin Roy finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1896 18.96¢ 23.55% $0
Will Lee Hodges finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1891 18.91¢ 23.49% $0
Will Lucas Glover finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1846 18.47¢ 22.80% $0
Maccabi Raanana vs. Hapoel Galil Elyon
Poly Kalshi
entity BUY K → SELL P 1756 17.56¢ 22.49% $4K
Will Garrick Higgo finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1744 17.44¢ 21.27% $0
Will Karl Vilips finish in the Top 10 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1734 17.34¢ 21.13% $0
Toronto Tempo vs. Washington Mystics
Poly Kalshi
entity BUY P → SELL K 1705 17.05¢ 21.31% $37
Will Luke Clanton finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1699 17.00¢ 20.61% $0
Will Lee Hodges finish in the Top 10 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1621 16.21¢ 19.52% $0
Will "The Death of Robin Hood" score at least 80 on the Rotten Tomatoe...
Poly Kalshi
entity BUY K → SELL P 1596 15.97¢ 19.72% $56
Will world GDP growth be 3.4% in 2026?
Poly Kalshi
entity BUY P → SELL K 1568 15.68¢ 18.80% $4K
Will Stephan Jaeger finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1450 14.50¢ 17.06% $0
Will "The Odyssey" score at least 80 on the Rotten Tomatoes Tomatomete...
Poly Kalshi
entity BUY P → SELL K 1361 13.61¢ 16.60% $20
Will Stephan Jaeger win the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1263 12.64¢ 14.51% $18
Will Karl Vilips finish in the Top 20 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 1027 10.28¢ 11.55% $32
Will Thorbjorn Olesen finish in the Top 5 at the 2026 RBC Canadian Ope...
Poly Kalshi
entity BUY K → SELL P 960 9.60¢ 10.67% $0
Will Sam Ryder finish in the Top 20 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 919 9.20¢ 10.22% $0
Will Pontus Nyholm finish in the Top 10 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 911 9.11¢ 10.07% $40
Will William Mouw finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 911 9.11¢ 10.07% $0
Will Chris Kirk finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 911 9.11¢ 10.07% $0
Will Taylor Moore finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 857 8.57¢ 9.42% $0
Will Matthieu Pavon finish in the Top 10 at the 2026 RBC Canadian Open...
Poly Kalshi
entity BUY K → SELL P 857 8.57¢ 9.42% $13
Will Matt Wallace finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 808 8.08¢ 8.83% $0
Will "The Odyssey" score at least 70 on the Rotten Tomatoes Tomatomete...
Poly Kalshi
entity BUY K → SELL P 639 6.40¢ 7.11% $53
Will "Toy Story 5" score at least 90 on the Rotten Tomatoes Tomatomete...
Poly Kalshi
entity BUY P → SELL K 632 6.32¢ 7.10% $170
Will world GDP growth be 3.2% in 2026?
Poly Kalshi
entity BUY K → SELL P 605 6.06¢ 6.46% $2K
Will "Supergirl" score at least 70 on the Rotten Tomatoes Tomatometer?
Poly Kalshi
entity BUY P → SELL K 569 5.70¢ 6.33% $399
Will Belgium score the most goals at the 2026 FIFA World Cup?
Poly Kalshi
entity BUY P → SELL K 557 5.57¢ 5.94% $8K
Will Matt Wallace finish in the Top 10 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 537 5.38¢ 5.72% $0
Pavel Šulc: 1+ goals
Poly Kalshi
entity BUY P → SELL K 491 4.92¢ 5.23% $0
Will Keith Mitchell finish in the Top 5 at the 2026 RBC Canadian Open?
Poly Kalshi
entity BUY K → SELL P 439 4.40¢ 4.63% $0
Will Jacob Bridgeman finish in the Top 5 at the 2026 RBC Canadian Open...
Poly Kalshi
entity BUY K → SELL P 381 3.81¢ 3.99% $0
Will Tommy Fleetwood finish in the Top 5 at the 2026 RBC Canadian Open...
Poly Kalshi
entity BUY K → SELL P 365 3.66¢ 3.83% $100
Market Platform Overround % Best Yes Best No Volume

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Market A Market B Platform Spread (bps) Confidence Volume

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How cross-platform arbitrage works

What is a "bps" spread?

One basis point equals 0.01¢ per contract. A 100 bps spread means you lock 1¢ of profit on every $1 pair you trade, after fees. Bigger spread, bigger edge.

How is ROI calculated?

ROI is net profit divided by total capital deployed (cost of the YES leg plus the NO leg of the hedge). It is the return on the money you actually lock up, not on contract notional.

What does "direction" mean?

"BUY K → SELL P" means buy the YES contract on Kalshi and sell YES on Polymarket (or equivalently buy NO on Polymarket). The opposite direction is the inverse pair.

Why do spreads exist?

Polymarket and Kalshi serve different user bases, settle differently, and update at different speeds. The price gap is the cost of that friction. Scanners surface it; execution is on you.