In early November 2020, the media reported that Sundar C. had bought the remake rights of the demonetisation thriller "Mayabazar 2016" (2020). The film was launched on 14 September 2020 and is based on the 2016 Indian banknote demonetisation. He produced the film under his banner Avni Movies. The film is directed by Badri who previously worked with Sundar C. as a dialogue writer for "Kalakalappu" (2012) and "Action" (2019). Prasanna and Shaam were cast as police officers while Ashwin Kakumanu and Yogi Babu were signed to portray a youngster and thief, respectively. Raiza Wilson was reported by the media as being a part of the film; however, this later proved to be false. Shruti Marathe, who starred in "Guru Sishyan" (2010), was cast as the female lead opposite Prasanna and this film marks her return to Tamil cinema. Rittika Sen, who was last seen in "Dagaalty" (2020), was cast as the female lead opposite Kakumanu. The film was shot in Chennai in twenty-six days during the COVID-19 pandemic. The title was later revealed to be "Naanga Romba Busy". Prasanna later revealed that the inspiration for the title came after he stated "Naa Romba Busy" () on his birthday. Srinivasan and Singampuli were selected to play comical roles.