NBA Finals odds make San Antonio the Kalshi favorite at 22%. San Antonio and Oklahoma City share the Polymarket lead at 21% as of September 18, 2026 at 20:32 UTC. New York shows the widest cross-venue spread among these six teams at 4 percentage points. These are market-implied probabilities, not forecasts or trading advice.
October 3 market update
Oklahoma City and San Antonio share the Kalshi lead in NBA Finals odds at 22%, while San Antonio leads the verified Polymarket team contracts at 23%, as of October 3, 2026 at 20:33 UTC. Oklahoma City and New York share the widest spread among the six displayed teams at 4 percentage points. The opening paragraph records the September 18 snapshot. Use the refreshed table below for this check. The dated opening is retained as a historical snapshot. Use the October 3 table for this refresh; last trades can differ from executable bids and asks.
Both venues list contracts on the 2026-27 NBA champion. The event is also searched as NBA title odds. Kairos puts both books on one screen so traders can compare the same team, the same season, and the settlement rule before sending an order. Check Kairos data for current prices.
What are the NBA Finals odds right now?
San Antonio last traded at 22 cents on Kalshi and 23 cents on Polymarket. Oklahoma City traded at 22 cents on Kalshi and 18 cents on Polymarket. New York shared the widest gap with Oklahoma City at 9 cents on Kalshi and 13 cents on Polymarket. Those differences create the cross-venue spread that sportsbook roundups usually omit.
| Contract | Kalshi price | Polymarket price | Implied probability | Cross-venue spread |
|---|---|---|---|---|
| San Antonio | 22.00 cents | 23.00 cents | 22.00% Kalshi, 23.00% Polymarket | 1.00 percentage points |
| Oklahoma City | 22.00 cents | 18.00 cents | 22.00% Kalshi, 18.00% Polymarket | 4.00 percentage points |
| Philadelphia | 10.00 cents | 11.30 cents | 10.00% Kalshi, 11.30% Polymarket | 1.30 percentage points |
| New York | 9.00 cents | 13.00 cents | 9.00% Kalshi, 13.00% Polymarket | 4.00 percentage points |
| Boston | 5.00 cents | 5.00 cents | 5.00% Kalshi, 5.00% Polymarket | 0.00 percentage points |
| Minnesota | 7.00 cents | 5.30 cents | 7.00% Kalshi, 5.30% Polymarket | 1.70 percentage points |
The table uses Kalshi's last trade and Polymarket's last trade from each public event feed. A 22-cent price corresponds to a 22% implied probability before fees. Bids and asks determine the price a trader can execute now. Read the Kalshi price and probability explainer before treating a last trade as a quote. A last trade records a completed transaction. It does not promise the same fill on the next order.
Where can traders trade NBA Finals markets?
Kalshi and Polymarket both list team contracts for the 2027 champion. Kalshi's event calls the winner the 2027 Pro Basketball Champion. Polymarket calls the event NBA: 2027 Champion. Each venue covers the same season, but each team trades in a separate order book with its own bid, ask, and depth.
Fees depend on the venue and market schedule. Kalshi publishes a contract-based fee formula and shows charges before confirmation. Polymarket's public event records can carry a market-specific fee schedule. Traders should inspect the live order ticket instead of applying one fee claim to every sports contract.
Kairos aggregates the books so a trader can see where the better price sits. The same NBA cluster includes NBA MVP odds and NBA Rookie of the Year odds. One terminal. Named teams, live cents, and the contract text that decides settlement.
How do the 2027 NBA Finals markets resolve?
Kalshi resolves a team contract Yes if that team wins the 2027 Pro Basketball Finals. Its San Antonio rule says: "If San Antonio wins the 2027 Pro Basketball Finals, then the market resolves to Yes." The other team contracts use the same condition with the listed team.
Polymarket resolves Yes if the listed team becomes NBA champion for the 2026-27 season. Its rules state: "If at any point it becomes impossible for a listed team to be named as the champion" under NBA rules, that team's contract resolves No. A cancellation, a delay beyond June 30, 2027, or no declared champion sends the event to Other under the published rule.
Why do Kalshi and Polymarket show different NBA title odds?
Different traders, liquidity, and order flow produce different prices on Kalshi and Polymarket. New York and Oklahoma City shared the widest spread among the six rows at 4 percentage points each. Neither gap guarantees an executable trade because the last prices can predate the current bid and ask.
Match team names and season labels before comparing cents. Kalshi shortens some team names in its public feed, while Polymarket uses the full franchise name. The rules tie both events to the 2026-27 champion. Market risk remains real, and every price can change after the timestamp.
Sources
Kalshi 2027 champion market Kalshi public event API Polymarket 2027 champion market Polymarket public event API Kalshi fee documentation Polymarket fee documentation