Group champions will be promoted directly to the Segunda RFEF. Due to the remodeling of the RFEF leagues, as of this season the promotion play-off is divided into two stages: regional and national. Four teams from each group participate in the regional stage, which were classified between places second and fifth of the regular season. The regional stage is a single match played on neutral ground. The second classified will face the fifth classified; and the third will do the same with the fourth. The winners of the two series will play a match to determine the team that will qualify for the national stage.[1]
In the regional phase, if a match ends in a draw, extra time will be played, if the same result is maintained at the end of extra time, the best seeded team will win.
The national stage will be played by 18 teams, which won their respective regional play-offs. Nine different matches will be played to determine the winners of the promotion to Segunda RFEF.[2]
The eighteen qualifying teams will be drawn into nine single-leg neutral site matches to determine the final promotion spots. For the purposes of the draw, the qualifying teams will be placed into pots corresponding to their final regular-season position in their respective groups (i.e. second-place finishers will be placed in one pot, third-place finishers in another, and so on). Participants will then be drawn such as to pit the highest remaining teams against the lowest. When teams that achieved the same standings finish are drawn to face each other, the team drawn first will be designated the home team.
In games ending in a draw at the end of regulation, an overtime period will be played. If the scores are still level at the end of the overtime period, the team that achieved a higher regular season finish will be crowned the winner (a penalty shootout will be held in matches between teams level on standings).
All matches will be played in Las Rozas, 20 km northwest of Madrid, at the main field of the La Ciudad del Fútbol and at the nearby Campo Municipal Dehesa de Navalcarbón.[3]
The 18 teams that were promoted through regular season groups are included.
The numbers of years after the last promotion are referred to the last participation of the club in Segunda División B, the division that was partially replaced by the Segunda División RFEF.