The 2020–21 Billie Jean King Cup is the 58th edition of the international women's tennis team's tournament and the first to be styled as the Billie Jean King Cup. For this edition, the format of the cup has changed. The main modification is the World Group taking place at one location and in one week, with twelve teams divided in four round-robin groups of three teams each, with the winners of each group advancing to the semi-finals. The series between the teams in this stage will feature two singles matches and one doubles match. As the World Group will now take place as one single tournament, the event has been named the Billie Jean King Cup Finals. The lower zone groups I, II and III will be composed of round-robin group play deciding promotion or relegation.