The short answer is not directly.
Jockeys are paid a riding fee for each race they ride. This is typically a fixed amount set by the racetrack or racing organization.
A jockey's earnings are not tied to the horse's finishing position. If the horse wins or places, the purse money goes to the horse's owner and trainer.
However, jockeys do benefit indirectly from a horse's success. A winning or placing horse brings the jockey greater exposure and a stronger reputation. That can lead to more rides with higher-paying owners and trainers, ultimately increasing the jockey's long-term income.
So while a jockey doesn't receive a cut of the purse, a successful race can significantly boost their career and earnings down the road.