2012 Segunda División B play-offs
The 2012 Segunda División B play-offs were the final playoffs for promotion from 2011–12 Segunda División B to the 2012–13 Segunda División. The four first placed teams in each of the four Segunda División B groups played the Playoffs de Ascenso and the four last placed teams in Segunda División were relegated to Segunda División B. It also decided the two teams which placed 16th to be relegated to the 2012–13 Tercera División.
Format
The four group winners have the opportunity to promote directly and become the overall Segunda División B champion. The four group winners were drawn into a two-legged series where the two winners will be promoted to 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 were 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, a draw will determine the club to play at home first.
Group Winners Promotion Play-off
Qualified teams
The draw was held in the RFEF headquarters, in Las Rozas, on 14 May 2012, 16:30 CEST.| Group | Team |
| 1 | Real Madrid Castilla |
| 2 | Mirandés |
| 3 | Atlético Baleares |
| 4 | Cádiz |
Matches
Semifinals
First leg
Second leg
Final
First leg
Second leg
| Segunda División B 2011–12 Winners |
| Real Madrid Castilla |
Non-champions Promotion Play-off
First round
Qualified teams
The draw took place in the RFEF headquarters, in Las Rozas, on 14 May 2012, 16:30 CEST.| Group | Position | Team |
| 1 | 2nd | Tenerife |
| 2 | 2nd | Ponferradina |
| 3 | 2nd | Orihuela |
| 4 | 2nd | Linense |
| 1 | 3rd | Lugo |
| 2 | 3rd | Eibar |
| 3 | 3rd | Huracán Valencia |
| 4 | 3rd | Lucena |
| 1 | 4th | Albacete |
| 2 | 4th | Amorebieta |
| 3 | 4th | Badalona |
| 4 | 4th | Real Jaén |
Matches
First leg
Second leg
Second round
Qualified teams
The draw was held in the RFEF headquarters, in Las Rozas, on 28 May 2012, 17:00 CEST.| Group | Position | Team | Notes |
| 3 | 1st | Atlético Baleares | Relegated from Group Winners Promotion Play-off |
| 4 | 1st | Cádiz | Relegated from Group Winners Promotion Play-off |
| 1 | 2nd | Tenerife | |
| 2 | 2nd | Ponferradina | |
| 4 | 2nd | Linense | |
| 1 | 3rd | Lugo | |
| 4 | 3rd | Lucena | |
| 1 | 4th | Albacete |
Matches
First leg
Second leg
Third round
Qualified teams
The draw was held in the RFEF headquarters, in Las Rozas, on 11 June 2012, 17:00 CEST.| Group | Position | Team |
| 4 | 1st | Cádiz |
| 1 | 2nd | Tenerife |
| 2 | 2nd | Ponferradina |
| 1 | 3rd | Lugo |
Matches
First leg
Second leg
Relegation play-off
Qualified teams
The draw was held in the RFEF headquarters, in Las Rozas, on 14 May 2012, 16:30 CEST.| Group | Team |
| 1 | Conquense |
| 2 | Palencia |
| 3 | Zaragoza B |
| 4 | Lorca Atlético |