The play-offs of the 2017 UEFA European Under-21 Championship qualifying competition involve the four runners-up with the best records among all nine groups in the qualifying group stage: Austria, Norway, Serbia, and Spain.
[1] The play-offs are played in home-and-away two-legged format.
The two play-off winners qualify for the final tournament.
As a result, eight matches played by each second-placed team will count for the purposes of determining the ranking.
Spain qualified for the final tournament.