Kumar produced and directed some movies in the late 1970s and early 1980s; "Pyar Zindagi Hai", "Badhti Ka Naam Dadhi" (1978), "Sabaash Daddy", "Zindagi" (1981), "Door Wadiyon Mein Kahin" (1980) and "Chalti Ka Naam Zindagi" (1982)which was his last appearance as an actor. Kumar's son Amit Kumar became a Bollywood singer in the 1974 with the song "Apne Bas Ki Baat Nahi", composed by Kumar for the film "Badthi Ka Naam Daadi". Amit Kumar became popular with success of the song "Bade Achche Lagte Hai". Kishore continued singing for several actors even in 1980s. Kumar performed stage shows right from 1969 to earn money to pay his income tax arrears. Kumar stopped singing for Amitabh Bachchan in the year 1981, after Bachchan refused to appear as a guest in the film "Mamta Ki Chhaon Mein", which Kishore produced. Kishore declined to give voice for Amitabh in "Naseeb", "Coolie", "Mard" and "Desh Premee". Kishore said he would give his voice to Randhir Kapoor in the film "Pukar". Since Kishore shared good rapport with R. D. Burman, he agreed to sing in "Mahaan", "Shakti" and "Bemisal". Later, Kishore called a truce by singing for Amitabh in a solo song in "Shahenshah" and later in "Toofan". Kishore sang the song "Mera Geet Adhura Hai" for his production "Mamta Ki Chaon Mein" and picturised the song on Rajesh Khanna. Kishore had directed the film, but died in 1987 and Rajesh Khanna helped Amit Kumar in releasing the film in 1989. He also temporarily stopped singing for Mithun Chakraborty after Yogeeta Bali divorced him and married Chakraborty. However, he later sang for Chakraborty in "Surakshaa" in the 1970s, and in the 1980s in many films, including "Boxer", "Jaagir", "Fareib" and "Waqt Ki Awaz".