Merchant is well known for acting in the shows Hip Hip Hurray, Ek Hasina Thi, Itna Karo Na Mujhe Pyaar, Har Mushkil Ka Hal Akbar Birbal, Pyaar Kii Ye Ek Kahaani and Kaisi Yeh Yaariyan.

Kishwar then appeared in many successful popular shows like Babul Ki Duwayen Leti Jaa, Des Mein Niklla Hoga Chand, Kutumb, Kasautii Zindagii Kay, Kayaamat – Jabb Bhi Waqt Aata Hai, Hatim and Khichdi.

In 2007, she played the positive role of Tamanna in Sanaya Irani and Arjun Bijlani's popular youth show Miley Jab Hum Tum in 2008.

Merchant, was forced to quit the Ticket to Finale task in its last leg and walked out of the house involuntarily with Rs 15 lakhs.

[7][8][9] In 2016, Kishwar made her comeback with Balaji's popular show Brahmarakshas, playing the main antagonist, Aparajita.