Depends on where the fight is taking place. Some states (United States) have a minimum round amount: As in: In Georgia the promoter must pay a minimum of $50 per scheduled round. So a 4 round fight at minimum is $200. If the fight ends before the final bell, the boxer still receives his full pay, barring any purse withheld or penalty.
:good That is why I respect you, you are really involved in boxing and not just "talking". I have fun with the trolling from time to time but the reality of the sport vs the business never blinds me.