The 2017–18 Primera División de Nicaragua season was divided into two tournaments (Apertura and Clausura) and determined the 69th and 70th champions in the history of the league.
The regular stage and quadrangular winners would have played to decide the tournament's champion, but ultimately the same team won both and the final was not necessary.
The same format was recently adopted by the Costa Rican Primera División, but for both half seasons.
The 9th place team in the aggregate table, Deportivo Sebaco, faced the second place team from the Segunda División, San Francisco Masachapa, in a playoff for a spot in the Primera División.
San Francisco Masachapa won the playoff 3-2 on aggregate and were promoted, while Deportivo Sebaco were relegated.