At the end of World War I, football began to be played in Čačak. According to some sources the first football match took place in 1920. Six years later, a group of union workers who organized on 1 May 1926 founded the club. Initially, the uniform was red and later was changed to red-and-white. The first president of the club was a carpenter, Jovan Jolović. On 6 August 1932, FK Borac had its first night match under stadium floodlights, with the Arsenal football club. Before World War II the club's biggest success was winning 1st place in the West Morava district league in 1934.
