[2] Thirty teams competed in the league, twenty returning from the 2014 Torneo de Transición and ten promoted from the 2014 Primera B Nacional (Aldosivi, Argentinos Juniors, Colón, Crucero del Norte, Huracán, Nueva Chicago, San Martín (SJ), Sarmiento, Temperley and Unión).
No teams were relegated to the Primera B Nacional Championship in the previous tournament.
The teams that place third to sixth in the league table advanced to the Liguilla Pre-Libertadores.
Teams play every other team once (either at home or away), and play one additional round against their local derby rival (or assigned match by AFA if a club doesn't have derby), completing a total of 30 rounds.
The Liguilla Pre Libertadores is contested by the four best placed teams from the league that have not already qualified for the Copa Libertadores, with the winners gaining a place in the 2016 tournament and the runners-up playing in the Copa Sudamericana.