2023 Segunda Federación play-offs

Twenty teams participated in the promotion play-off. Each of the five groups of the Segunda División RFEF were represented by the four teams that finished the regular season between the second and fifth positions.^[1] In the draw for the first stage, the participating teams were assigned to pots corresponding to their final regular season position. While avoiding matches between teams from the same regular season group, second-place finishers were drawn against fifth-place finishers while teams that finished third would play teams that finished fourth. The same draw process was repeated, to the extent that it would be possible, in the draw for the second round.^[2]

The five winning clubs of the second stage attained promotion to Primera RFEF and accompanied the five group champions who had already achieved their promotion.^[3]

The final two relegation spots (of 27 total) were also determined via play-offs. The four 13th-place finishers with the lowest point totals were drawn into two single-leg matches, with the winners securing survival in the Segunda División RFEF and the losers being relegated to the Tercera División RFEF. The two match-ups were selected through a random draw and hosted at a venue chosen from among the stadiums selected to host the promotion play-offs.

As of this season, the RFEF recovered the two-legged knockout system, due to the complaints filed against the single knockout system at a neutral venue that had been implemented after COVID-19 and the subsequent reform of the football leagues organized by the RFEF.^[4]

• The five teams that were or would be promoted to Primera Federación through regular season groups and the five play-off winners were included.
• The number of years after the last participation of the club in the third tier is referred to the previous appearance at that level, where Segunda División B was replaced by the Primera Federación.