Highest paid referees in the world

The NBA referees are the highest paid professional match officials in the world. The season begins in October and finals are being played in June. NBA referees earn a good salary package, making more money than any other match officials.
Match Officials
Per Match
Playoffs & Finals
Annual Earnings
NBA Professional Referee
NBA Entry Level Referee
Women's NBA Referee
The average annual salaries of professional referees in the North-American top leagues:
NBA (basketball): $375,000
MLB (baseball): $235,000
NHL (hockey): $212,500
NFL (American football): $188,322

Source: TSM Sportz