"The Attorney" broke even by attracting over three million viewers within a week of its release.
According to the Korean Film Council, the film lured 446,747 cinemagoers on the Christmas Eve and 640,546 on the Christmas Day nationwide.
As of Wednesday, the film has been seen by 3.11 million people, surpassing the three-million mark just a week after it was released on Dec. 19.
The total production cost of W7.5 billion meant that "The Attorney" needed 2.5-2.6 million viewers to break even.
The film is the story of a man who despite his humble background becomes a successful tax lawyer in Busan in the early 1980s, but when he learns that a student activist is in trouble, he decides to defend him.
The film was inspired by the "Boolim Incident" in the early 1980s when Roh Moo-hyun, later to become president, defended student activists who were tortured and tried for possessing banned literature.