NBA Champion: Polymarket vs Kalshi
San Antonio Spurs leads at 22.5¢ on Polymarket against 22.5¢ on Kalshi. 1 outcome currently differ by 3 points or more between the two venues — the kind of gap that can survive fees and taxes.
Poly
KalshiDiff
San Antonio Spurs22.5¢22.5¢0.0Oklahoma City Thunder12.5¢15.5¢-3.0Philadelphia 76ers11.6¢13.5¢-1.9Houston Rockets7.8¢7.5¢+0.3Boston Celtics7.5¢6.5¢+1.0New York Knicks▼1.06.5¢6.5¢0.0Minnesota Timberwolves▲0.15.6¢5.5¢+0.1Detroit Pistons4.5¢3.5¢+1.1Los Angeles Lakers▲0.83.7¢3.5¢+0.2Toronto Raptors▼0.13.5¢3.5¢+0.1Denver Nuggets▲1.03.5¢2.5¢+1.1Cleveland Cavaliers2.8¢2.5¢+0.3Portland Trail Blazers▲0.32.5¢2.5¢0.0Miami Heat▲0.22.3¢2.5¢-0.3Golden State Warriors▲0.51.9¢1.5¢+0.5Indiana Pacers▼0.11.4¢1.5¢-0.1Atlanta Hawks1.1¢1.5¢-0.5Memphis Grizzlies▼0.10.9¢1.0¢—Orlando Magic▲0.10.9¢1.0¢—Dallas Mavericks0.9¢1.5¢-0.7Charlotte Hornets▲0.10.7¢1.0¢—Washington Wizards0.4¢1.0¢—Utah Jazz0.4¢1.0¢—Phoenix Suns▲0.10.4¢1.0¢—New Orleans Pelicans0.1¢1.0¢—Los Angeles Clippers▲0.10.1¢1.0¢—Sacramento Kings0.1¢1.0¢—Milwaukee Bucks0.1¢1.0¢—Chicago Bulls0.1¢1.0¢—Brooklyn Nets0.1¢1.0¢—Polymarket shows the last traded price; Kalshi shows the bid/ask midpoint. Where the Kalshi book is too wide to compare, the raw bid–ask range is shown instead and no difference is reported. Prices move continuously — confirm on the venue before trading.
Where to trade this
Polymarket review
USDC settlement, taker fees 0.75–1.80%, no interest on balances.
Kalshi review
CFTC-regulated, USD settlement, about 4% APY on idle cash.
Deciding between them? Read the full Polymarket vs Kalshi comparison, or see the best prediction market apps.
NBA Champion odds explained
The table above prices NBA Champion on Polymarket and Kalshi at the same moment. Each figure is what one contract costs in cents, so 52.0¢ means the market implies a 52% chance. Contracts settle at $1, which makes the price and the implied probability the same number.
The two venues run separate order books, so the same outcome can sit several points apart. Where the gap reaches three points it is worth a look: that is roughly what a difference needs to be to survive Polymarket's 0.75–1.80% taker fee and Kalshi's per-contract charge. Our prediction market arbitrage guide covers how to trade a gap without getting caught with one leg filled.
Frequently asked questions
Where can I get the best odds on NBA Champion?
The table above prices NBA Champion on both venues, refreshed every ten minutes, with the cheaper side highlighted for each outcome. It is often not the same venue across the whole board.
Is there an arbitrage opportunity on NBA Champion?
Differences of three points or more are flagged above — roughly what a gap needs to survive fees on both sides. Smaller ones are shown but rarely worth acting on; the arbitrage guide covers the execution risk.
Who is favourite in NBA Champion?
San Antonio Spurs carries the highest implied probability on Polymarket right now. The ranking reflects the most recent sync and moves with the market.
Do I owe tax on profits from this market?
Yes. Kalshi issues a 1099-MISC and Polymarket issues nothing, and there is no IRS guidance specific to prediction markets — see the tax guide.
More sports odds, or every market we track on the Polymarket vs Kalshi comparison. New to this? Start with how prediction markets work and the best prediction market apps.