His acting career began in 2006 when he acted in a science fiction TV show called Antariksh that aired on Star Plus. In 2008, he starred as JaiKishan in a comedy movie called Don Muthu Swami, starring actor Mithun Chakraborthy in the lead role, however the film too didn’t do well. He again returned to television in 2009 with another Star Plus show called Chehra, a suspense drama revolving around a handicapped girl. Mohit played her husband Garv, a young business tycoon. Mohit was also a part of the TV series Bandini(NDTV Imagine). In December 2010, a show Ganga Kii Dheej aired on Sahara One, which dealt with the ordeals of young unmarried girls in a village called Kaliganj based in rural West Bengal. Mohit Raina played the male lead, Agantuk, who plays a pivotal role in eradication of the evil customs of the village.
