Mumtaz appeared as a child actress in Sone Ki Chidiya (1958). As a teenager she acted as an extra in Vallah Kya Baat Hai, Stree and Sehra in the early 1960s. As an adult, her first role in A-grade films was that of the role of the sister of the hero in O. P. Ralhan's Gehra Daag. She got small roles in successful films such as Mujhe Jeene Do. Later, she got the role of the main lead heroine in 16 action films, including Faulad, Veer Bhimsen, Tarzan Comes to Delhi, Sikandar-E-Azam, Rustom-E-Hind, Raaka, and Daku Mangal Singh, with freestyle wrestler Dara Singh, and was labelled as a stunt-film heroine. In the films that Dara Singh and Mumtaz did together, Dara's remuneration was INR 450,000 per film, and Mumtaz's salary was INR 250,000 per film.
