Atlético Nacional entered the season as defending champions, having won the 2024 Finalización tournament.
[2] For this season, the regional derbies matchday in the first stage of each tournament was reinstated after being scrapped in 2024 due to scheduling constraints, whilst the distribution of international berths was kept: both season champions as well as the top two non-champion teams in the aggregate table will qualify for the Copa Libertadores, with the next best three teams in the aggregate table as well as the Copa Colombia champions qualifying for the Copa Sudamericana.
[1] 20 teams take part in the season, the top 18 teams in the relegation table of the previous season as well as the 2024 Primera B champions Unión Magdalena, who were promoted after a one-year absence and runners-up Llaneros, who were promoted for the first time in their history.
[4] For this season, Águilas Doradas returned to Rionegro, Antioquia to play their home matches, after the agreement with the Sincelejo Municipality expired at the end of 2024 and was not renewed.
[1] Source: Soccerway A separate table is kept to determine the teams that are relegated to the Categoría Primera B for the next season.