In most cases, the winning owner of a race would receive 60% of the purse money.
For example, if the race had a purse of $25,000, the winning horse would be awarded $15,000 ($25,000 * 0.60).
Unfortunately, this $15,000 isn't all profit for the owner. When a horse wins, the owner must still pay the trainer and jockey their percentage of the winnings. It is typical for the jockey and trainer to each receive 10% of the horse's winnings. That means the jockey and trainer would each receive $1,500 ($15,000 * 0.10). This would result in the owner taking in a total of $12,000 for winning a race with a purse of $25,000.