S. D. Burman recorded Kumar's voice for Dev Anand's "Munimji" (1954), "Taxi Driver" (1954), "House No. 44" (1955), "Funtoosh" (1956), "Nau Do Gyarah" (1957), "Paying Guest" (1957), "Guide" (1965), "Jewel Thief" (1967), "Prem Pujari" (1970), and "Tere Mere Sapne" (1971). He also composed music for Kumar's home production "Chalti Ka Naam Gaadi" (1958). Some of their songs were "Maana Janaab Ne Pukara Nahin" from "Paying Guest" (1957), "Hum Hain Rahi Pyar Ke" from "Nau Do Gyarah" (1957), "Ai Meri Topi Palat Ke Aa" from "Funtoosh" (1956), and "Ek Ladki Bheegi Bhaagi Si" from "Chalti Ka Naam Gaadi". Asha Bhosle and Kishore performed duets composed by Burman including "Chhod Do Aanchal" from "Paying Guest" (1957), "Ankhon Mein Kya Ji" from "Nau Do Gyarah" (1957), "Haal Kaisa Hai Janaab Ka" and "Paanch Rupaiya Baara Aana" from "Chalti Ka Naam Gaadi" (1958) and "Arre Yaar Meri Tum Bhi Ho Gajab" from "Teen Deviyan" (1965).