As a 14-year-old, Margit Tóth competed at the Montréal Olympics. With the Hungarian team, she placed fourth in the all-around, while also reaching the individual final, placing 17th. Earlier that year, Tóth had won a national title in the uneven bars, which would be her only senior title. Tóth qualified again for the national team for 1978 World Championships, where the team again placed fourth, but Tóth did not enjoy any individual success. She retired from the national team due to exhaustion in 1979, but returned in 1981, when she competed in the World Championships one more time, placing 8th with the team. Tóth then focused on her education, becoming a physical education teacher and gymnastics coach.