The season started on 22 September 2018 and will end on 19 May 2019 with the promotion playoffs to LEB Plata.
The two runners-up from each stage will play a final match for the two last spots.
[3] The winner of this single-legged series qualified as group A champion.
The games were played on 4 and 5 May at Pavelló Barris Nord of Lleida.
The four runners-up will play a repechage to decide two more promotion spots.