The NBA declared on Friday that it had imposed a $50,000 fine on Irving, who according to TMZ and widespread reports attended a large family birthday celebration while not wearing a mask.
That was in contravention of the league's coronavirus protocols.
But that penalty is just the tip of a very large iceberg, as Irving also must sacrifice his salary for the games he has since missed while quarantining, and according to ESPN's Bobby Marks that amounts to $816,898 in addition to the fine.
In a statement, the NBA said: "Brooklyn Nets guard Kyrie Irving has been fined $50,000 for violating the league's health and safety protocols, which among other things prohibit attending indoor social gatherings of 15 or more people or entering bars, lounges, clubs or similar establishments, it was announced today by Byron Spruell, president, league operations.
"The violation occurred when he attended a private indoor party last weekend.
"Irving will forfeit salary for any games he misses due to his five-day quarantine period, which will allow him to return to team activities on Saturday, January 16 if he continues to test negative."
Irving has averaged 27.1 points in his seven NBA appearances for the Nets this season, but for personal reasons he has not played in the team's most recent five games.
The 28-year-old six-time NBA All-Star joined the Nets in 2019 from the Boston Celtics and began his career with the Cleveland Cavaliers, landing a 2016 championship with the Cavs.
The Nets face the Orlando Magic on Saturday.