Born in Coburg, as a young adult he worked from 1900-02 at Deutsche Bank in Berlin and from 1902-04 at Dresdner Bank. 1905 he returned to Coburg as an actor-in-training and from 1906-08 he performed at the local court theatre. From 1908-09, he worked at the Residence Theater Hanover, 1909 at the Summer Theatre in Posen and from 1909-10 at the court theatre in Gera. 1910, he played at the Liebich Theatre and at the Victoria Theatre in Breslau.
Fred Immler retired from acting in 1935 and worked primarily as a dispatcher for a production company until the end of World War II. His last film appearance was in the 1935 film Der blaue Diamant (English: The Blue Diamond). After the war he retired to his hometown of Coburg.