In the NBA, each team is allowed a maximum of two coach's challenges per game under the current rules. Specifically, each team starts with one challenge per game, and if their first challenge is successful, they are awarded a second challenge to use later in the same game

. The challenges can be used to review only three types of calls:

• A personal foul charged to the challenging team,
• An out-of-bounds violation where the challenging team was not awarded possession,
• A goaltending or basket interference violation (except in the last two minutes of the fourth quarter and any overtime, where these reviews are triggered only by officials)

Therefore, the total number of challenges a team can have in a game is up to two, but only if the first challenge is successful; otherwise, the team has just one challenge for the entire game

. This rule is designed to limit the number of challenges and maintain game flow, although some criticism exists about the impact of challenges on game pace