Dey counted along with Mohammed Rafi, Kishore Kumar and Mukesh of the most important Indian playback singers. He has recorded more than 3500 songs over the course of his career. In December 1953, he married Sulochana Kumaran; they had two daughters: Shuroma (* 1956) and Sumita (* 1958). Dey lived in Bangalore since the 1990s; his wife Sulochana died in January 2012 of cancer.
- National Film Award for Best Male Playback Singer 1970 Yes Khushi Ora Bole from the film Nishi Padma
- 2011: Filmfare Awards for his life's work
- 2007: Dadasaheb Phalke Award for lifetime achievement