MLS (Major League Soccer) referees make a salary based on their level of experience. Level four is the most experienced and make a total of 875 a game. assistant referees make $495 a game and officials make $285 a game. Level three referees make 775 per game, assistant referees earn $360, and officials make $260 a game. Level two makes $679, $310, and $230 per game. Level one makes $565, $255, and $205 per game.