The 1912–13 Prima Categoria season was won by Pro Vercelli.
In summer 1912, minor clubs took control over the Italian Football Federation, and imposed a championship reform.
New vicepresidents Mr.Valvassori and Mr.Faroppa created a new format with more clubs but more groups, regionalising the tournament.
Due to this, the sides began the final round with a point bonus: Note:solely 8 matches really played instead of 10.
Naples won 5–3 on aggregate, advanced to Central-Southern Final.