The following is a list of seasons played by B 1908 from the founding of the club in May 1908 up to the most recent season. In 1912, the club joined Amager Boldspil-Union (ABU), joining their league and cup tournaments and later also participated in tournaments organised by the Københavns Forstadsklubbers Boldspil Union (KFBU). In the first 1912-season for seniors arranged by the new football association, Boldklubben 1908 won the regional league championship of Amager by going through the tournament undefeated. Their first competitive league match was played away in April 1912 against Boldklubben Fremad Amager, ending in a 13–0 win, as part of the first match in the official regional championship of Amager.
