The winning teams from each tournament played a two-legged final for the season championship and to earn one of the two berths allocated to Argentine clubs in the 1992 Copa Libertadores.

The remaining berth was allocated via a direct elimination tournament between the top four (or five, depending on the outcome of the season final) teams from both Clausura and Apertura.

The match played between Boca Juniors and San Lorenzo was suspended following incidents in the stands during halftime that resulted in the death of a supporter.

The championship decider was played between Newell's Old Boys and Boca Juniors, champions from the Apertura and Clausura tournaments respectively.

San Lorenzo won the final against Boca Juniors and earned the remaining berth for the tournament.