He is the eldest son of businessman, Brotin Bose Roy and Dolly Roy. His younger brother, Rohit Roy is also a TV actor. Ronit Roy spent his childhood in Ahmedabad, Gujarat. This is where he did his schooling with the father of Ayush Sarkar, teenage actor. After his schooling, Roy pursued hotel management. After completion of his studies, he moved to Mumbai and stayed at the residence of filmmaker Subhash Ghai. While Roy was keen to work in the film industry, Subhash Ghai persuaded him, not to pursue it due to the difficulties associated with it. Ronit worked as a management trainee at Mumbai's Sea Rock Hotel. To have experience at all different levels, Ronit's work ranged from dish-washing and cleaning to serving tables and bar-tending.