The 2015–16 FA Women's Premier League Cup is the 25th running of the competition, which began in 1991.
Going into the tournament, Charlton Athletic were the reigning champions, having defeated Sheffield on penalties the previous season.
The competition began with a Determining Round, which consisted of all 72 teams in the FA Women's Premier League being drawn in pairs.
The winners of these 36 games progressed to the next stage of the competition, while the losers qualified for the 2015–16 FA Women's Premier League Plate.
[5] With 36 teams progressing from the determining round, four needed to be eliminated to allow a single-elimination knockout tournament to take place.