NFL prediction market volume reached at least $1.035 billion from Sept. 7-13, with Kalshi accounting for $983.36 million as regular-season trading spread across the Week 1 slate.
NFL prediction markets generated at least $1.035 billion in tracked contract volume from Sept. 7-13, up from $72.72 million in our previous weekly volume report.
Kalshi accounted for $983.36 million, including $537.48 million in direct NFL contracts and $445.88 million in NFL-only combo contracts. Polymarket Global added $28.00 million, while Polymarket US had reported $23.20 million across five days when we collected the data.
The volume was not confined to the opening prime-time games. 49ers-Rams and Patriots-Seahawks each generated more than $100 million across the tracked venues, while the other 14 Week 1 matchups added another $315.58 million.
Week 1 also provides the first regular-season checkpoint against our projection that Kalshi NFL volume could reach about $57 billion this season.
Our weekly reporting window ended at 12:00 a.m. UTC on Sept. 14. Later Week 1 markets therefore reflect volume accumulated through the cutoff rather than final game totals. The combined NFL total is also a lower bound because Polymarket US had not posted its Sept. 10 and Sept. 13 Daily Market Reports when the data was collected.
NFL-only combos added $445.9M on Kalshi
Week 1 game markets and game-specific props generated $495.92 million on Kalshi, up from $3.56 million in the prior week. Other direct NFL contracts contributed another $41.55 million, taking direct NFL volume to $537.48 million.
NFL-only combo contracts added $445.88 million, up from $52.25 million a week earlier. Those combos accounted for 45.3% of Kalshi’s NFL volume, with direct NFL contracts making up the remaining 54.7%.
Week 1 NFL Game Markets vs Combos
4,829,753
Total transactions
| Date (UTC) | Direct NFL volume | NFL-only combo volume | Total NFL volume |
|---|---|---|---|
| Monday, Sept. 7 | $3.7M | $11.7M | $15.4M |
| Tuesday, Sept. 8 | $7.7M | $16.8M | $24.6M |
| Wednesday, Sept. 9 | $30.6M | $40.7M | $71.2M |
| Thursday, Sept. 10 | $112.5M | $51.8M | $164.4M |
| Friday, Sept. 11 | $79.0M | $41.6M | $120.6M |
| Saturday, Sept. 12 | $6.5M | $30.1M | $36.7M |
| Sunday, Sept. 13 | $297.4M | $253.1M | $550.5M |
| TOTAL | $537.5M | $445.9M | $983.4M |
NFL volume tops $1B across three venues
Kalshi’s NFL volume rose to $983.36 million from $70.85 million the previous week, an increase of $912.51 million, or 1,288%. Polymarket Global reached $28.00 million, up from $626,401.82, while Polymarket US had already reached $23.20 million across five reporting days.
| Venue | Aug. 31-Sept. 6 | Sept. 7-13 | Increase | WoW | Status |
|---|---|---|---|---|---|
| Kalshi | $70.85M | $983.36M | $912.51M | 1,288% | Complete |
| Polymarket Global | $626.40K | $28.00M | $27.38M | 4,371% | Complete |
| Polymarket US | $1.25M | $23.20M | $21.95M | 1,760% | Partial: five daily reports |
| Tracked total | $72.72M | At least $1.035B | At least $961.84M | At least 1,322% | Partial due to Polymarket US |
Back-to-back $100M games set the pace
Patriots-Seahawks generated at least $111.49 million across the tracked venues, including $103.69 million on Kalshi. A night later, 49ers-Rams moved ahead with at least $117.69 million overall, including $95.63 million on Kalshi.
The remaining 14 matchups generated another $315.58 million. Across the full 16-game board, Kalshi and Polymarket Global recorded 3,989,735 trades and $523.13 million in contract volume, averaging 131.1 contracts per transaction.
NFL accounted for 30.1% of Kalshi sports volume
Kalshi generated $3.26 billion in sports contract volume during the week and $12.98 billion across all markets in our prediction-market volume tracker. NFL contracts, including NFL-only combos, represented 30.1% of Kalshi sports volume and 7.6% of its total market volume.
Polymarket Global recorded $695.21 million in sports volume and $1.12 billion across all markets. Its $28.00 million in NFL trading represented 4.0% of sports volume and 2.5% of total volume.
| Venue | NFL volume | Sports volume | NFL share of sports | Total volume | NFL share of total |
|---|---|---|---|---|---|
| Kalshi | $983.36M | $3.26B | 30.1% | $12.98B | 7.6% |
| Polymarket Global | $28.00M | $695.21M | 4.0% | $1.12B | 2.5% |
Methodology
Our analysis uses deduplicated hourly contract-volume and trade-count data for the Monday-Sunday UTC windows of Aug. 31-Sept. 6 and Sept. 7-13. For each provider market and hour, the latest value by computation time was selected before summing. The Sept. 7-13 window ended at 12:00 a.m. UTC on Sept. 14.
Kalshi’s direct NFL total covers current catalog markets attributable only to the NFL. Its combo total includes complete combo structures only when every resolved leg was NFL-related. Mixed-category combos, unresolved combos, Netflix ticker false positives, college football, CFL and Olympic flag-football markets were excluded. Direct legs and combo contracts were counted once each as separate provider markets.
Sports and platform totals use our category and provider aggregates for the same window. Polymarket US uses official Daily Market Report Trade Volume; Sept. 10 and Sept. 13 reports were unavailable at collection time. Volume measures contracts traded during each window, not ending cumulative volume or dollar notional.