Teams played matches within a series of divisions with the winners of the top division being crowned the Champions. Matches were played using a Twenty20 format.
The championship worked on a points system with positions within the divisions being based on the total points. Points were awarded as follows:[2]
The 2015 Women's Twenty20 Cup was divided into four divisions: Divisions One, Two and Three with nine teams each and Division Four with 11 teams, divided into three regional groups; teams in the top three divisions played each other once, and teams in Division Four played between four and six matches. The top team in each Division Four group progressed to a final group of three, with the top two being promoted.