Chuck dies in the fire he set. Jimmy is shocked at Chuck's death and believes himself to be at fault because of his interaction with the insurance company. Howard believes Chuck's death was his fault because he forced Chuck to retire.

How did Chuck Mcgill die?

Chuck's life ended at his own hand, via an intentional house fire, but his presence certainly hasn't left Better Call Saul, and his brother's death (and life) continues to shape who Jimmy will become.

Is Chuck actually dead?

Season 4. In the first episode of season four, we find that Chuck is alive and well, having been rescued by Czech girl, Eva (Clémence Poésy) who has no idea of his wealth or who he is. He creates a fake name and persona as he no longer wants to be the manipulative Chuck Bass.