The National Basketball League Cup, often shortened to the NBL Cup, was a midseason tournament for the Australian National Basketball League (NBL) played during the 2020–21 season.

The majority of the 36 games were scheduled to be played at John Cain Arena (formerly Melbourne Arena), with a small amount scheduled for the State Basketball Centre in Wantirna South, Melbourne.

[5][6] On 14 March 2021, the Perth Wildcats won the inaugural NBL Cup with a 7–1 record in eight games played.

At the completion of the NBL Melbourne Hub, teams returned to regular home-and-away schedules.

[8] A mid-season tournament was raised again by the league in January 2025 following the success of the NBA Cup.