Money gambled on horse racing and at tracks are used to calculate the purse money,
Tracks with an accompanying casino (racino), contribute some of their gaming profits to the purse as well.
7.25% of the amount bet onsite goes to the purse.
Four percent of the amount wagered through Advanced Deposit Wagering is added to the purse.
One and half percent of simulcast wagers are contributed to the purse.
Online betting contributes the lowest percentage to the purse and in some cases zero.