How much does a Boxer earn? It seems it varies a lot, but some matches can fetch a very large sum no matter whether they win or lose.
Just a few examples of the Guaranteed purse figures:
$31.4 million Floyd Mayweather v Miguel Cotto, May 6, 2012
$29.5 million Mike Tyson v Evander Holyfield, June 28, 1997
$26.0 million Manny Pacquiao v Timothy Bradley ($5 m) June 2012
$25.0 million Manny Pacquiao v Juan Manuel Márquez ($3 m) December 10, 2012
$23.3 million Oscar de La Hoya’s v Floyd Mayweather ($10m), May 5, 2007
$22.0 million Manny Pacquiao v Juan Manuel Márquez ($5 m) Nov 12, 2011
$ 3.0 million Julio Cesar Chavez Jr v Sergio Martinez ($1.4 m) Sept 2012
$ 2.0 million Saul “Canelo” Alvarez v Josesito Lopez ($212,500) Sept 2012
$ 1.025 million Timothy Bradley v Joel Casamayor ($100,000) Nov 2011
51.1 - 873,687