For this season, the competition was played under the same format as the previous season, with the thirty-six participating teams split into two zones of 18 teams, where they played against the other teams in their group twice: once at home and once away. However, since this season had two teams less than the previous one as no teams were relegated from
Primera División, no interzonal matches between rival teams were played, although rival sides were still paired together for the season draw and drawn into different zones. Both zone winners played a final match on neutral ground to decide the first promoted team to the top flight for the following season, while the teams placed from second to eighth place in each zone played a knockout tournament (
Torneo Reducido) for the second promotion berth along with the loser of the final between the zone winners. Moreover, the playoff match between the sides placing second-from-bottom in each group was not played this season, and instead four teams were relegated to the third-tier leagues, those being the bottom two teams from each zone. Similar to previous seasons, fifteen Primera Nacional teams qualified for the
2026 Copa Argentina through league performance, those being the top seven teams of each zone plus the best eighth-placed one. ==Club information==