The Milwaukee Bucks and Doc Rivers agreed to a contract through the 26-27 season worth approximately $40 million.
As the current season is half over, Rivers will be paid at an annual rate of over $11 million over 3.5 seasons.
The Bucks also owe money to former head coaches Mike Budenholzer and Adrian Griffin.
Until Erik Spoelstra signed his extension with the Miami Heat, Monty Williams was the highest paid coach in the NBA at approximately $13 million per season.