Kalshi undercuts sportsbooks on some Week 9 NFL contracts after fees

Betfirm’s comparison of Week 9 NFL prices found that Kalshi offered lower costs than sportsbooks on 11 of 30 moneyline sides after fees. The reported average price gap was 0.9 cents.

Comparing the available prices

The analysis covered every Week 9 game for which both a sportsbook line and a Kalshi quote were available, according to Betfirm. Prices were recorded on the morning of November 7, with the findings published on Nov 7, 2026, at 12:00 PM ET.

The comparison also examined spreads and totals. After fees, Kalshi was cheaper on 10 of 28 spread sides and 9 of 28 totals sides, according to Betfirm.

A selective price advantage

Across all three categories, the number of sides priced more cheaply on Kalshi was less than half of those compared. The findings therefore describe a selective advantage, rather than consistently lower pricing across the available Week 9 NFL markets.

The figures reflect a morning snapshot. The supplied summary does not identify the individual sides with lower prices or provide further detail about the fee calculations.

What it means for prediction markets

• Fees matter: Betfirm’s lower-price counts incorporate fees, making transaction costs part of the comparison rather than an excluded expense.
• Advantages vary by market: Kalshi was cheaper on 11 of 30 moneyline sides, 10 of 28 spread sides and 9 of 28 totals sides—not across the board.
• Timing limits the conclusion: The comparison applies to prices observed on the morning of November 7, not necessarily to subsequent quotes.