Format
The four group winners have the opportunity to promote directly and become the overall Segunda División B champion. The four group winners will be drawn into a two-legged series where the two winners will be promoted to the Segunda División and will enter into the final for the Segunda División B champion. The two losing semifinalists will enter the playoff round for the last two promotion spots. The four group runners-up will be drawn against one of the three fourth-placed teams outside their group while the four third-placed teams will be drawn against each other in a two-legged series. The six winners will advance with the two losing semifinalists to determine the four teams that will enter the last two-legged series for the last two promotion spots. In all the playoff series, the lower-ranked club will play at home first. Whenever there is a tie in position (''e.g.'' like the group winners in the Semifinal Round and Final or the third-placed teams in the first round), a draw will determine the club to play at home first.Group Winners promotion play-off
Qualified teams
Bracket
Matches
Semifinals
=First leg
==Second leg
=Final
Non-champions promotion play-off
First round
Qualified teams
Matches
=First leg
==Second leg
=Second round
Qualified teams
Matches
=First leg
==Second leg
=Third round
Qualified teams
Matches
=First leg
==Second leg
=Relegation play-off
Qualified teams
Matches
The losers of this tournament will be relegated to the 2019–20 Tercera División.First leg
Second leg
References
{{DEFAULTSORT:2019 Segunda Division B play-offs Segunda División B play-offs 2019 Spanish football leagues play-offs 2018–19 Segunda División B