​NASCAR is gearing up for the 20th race weekend of the 2026 season at Chicagoland Speedway, where the O’Reilly Series is set to put on a thrilling show. The series has not competed at this venue since 2019, and now the action returns with a substantial purse on the line. The O’Reilly Series race at Chicagoland will feature a total purse of $1,661,806 on Saturday evening. NASCAR no longer discloses the earnings for the winning driver, making it impossible to determine exactly how much of the prize will go to the winning team. Since Chicagoland was off the schedule last year, there’s no direct comparison to previous purses. It will be fascinating to see which NASCAR driver ultimately takes the largest share of the winnings at Chicagoland this weekend. Justin Allgaier is aiming for a sixth win of 2026, while Jesse Love and Corey Day hope to knock him from the top. Chicagoland is poised to deliver a memorable show, with expectations riding high. For how to watch NASCAR live at Chicagoland in July 2026, including the full schedule, see the related guide. This article originally appeared on Motorsports Wire: NASCAR purse for the O’Reilly Series race at Chicagoland in July 2026.