This episode marks the final regular appearance of Chuck McGill. ... However, McKean confirmed that Chuck is indeed dead, stating: "It seemed like this was kind of the end of Chuck's chapter in the life of Jimmy McGill-slash-Saul Goodman.

How did Chuck McGill die?

Season 4. 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.

Why did Charles McGill kill himself?

After suffering a major relapse of his EHS following his failed attempt to get Jimmy disbarred as well as failing to sue HHM for breach of contract and destroying his friendship with Howard in the process, Chuck committed suicide by setting fire to his house.