Sporting Cristal won their nineteenth domestic championship on 16 December after beating Alianza Lima in both legs of the finals.
The winner of this tournament gained access to the playoffs and the 2019 Copa Libertadores if they finished in the top eight of the aggregate table at the end of the season.
The winners of the Apertura and Clausura qualified to the playoffs and the 2019 Copa Libertadores as long as they finished in the top eight of the aggregate table at the end of the season.
If teams were tied in points, a third match on neutral ground would be played to decide the national champion.
a: Ayacucho played their home games in the Torneo de Verano and Torneo Apertura at Estadio Eloy Molina Robles in Huanta while their regular stadium Estadio Ciudad de Cumaná underwent maintenance works.
[7] c: Comerciantes Unidos played their home games at Estadio Carlos A. Olivares in Guadalupe due to their regular stadium Estadio Juan Maldonado Gamarra not meeting ADFP's stadium requirements.
e: UTC initially planned to play their home games at Estadio Mansiche in Trujillo due to their regular stadium Estadio Héroes de San Ramón not meeting ADFP's stadium requirements.