She began her career as a print model and went on to act in theater. After brief appearances in a few films, Kaur starred in Anurag Kashyap's production Peddlers. She followed it with her breakthrough role in The Lunchbox. In 2014, Kaur had a recurring role in the fourth season of the American television series Homeland, in which she played Tasneem Qureshi, an Inter-Services Intelligence agent. She then played the leading lady opposite Akshay Kumar in the war thriller Airlift, a major critical and commercial success. Nimrat can currently be seen playing the role of Rebecca Yedlin on the FOX TV series Wayward Pines.