On 25 January 2023, the UEFA Executive Committee confirmed an altered format for the 2024–25 Nations League, including the addition of the promotion/relegation play-offs. In addition to the automatic promotion and relegation decided by the league phase, the promotion/relegation play-offs will determine the final composition of the leagues for the
2026–27 UEFA Nations League. The matches will be played home-and-away over
two legs. If the team from the higher league is the winner, both teams will remain in their respective leagues, whereas if the team from the lower league wins, they will be promoted to the higher league, with the losers relegated to the lower league. The match-ups in the promotion/relegation play-offs are as follows: • The third-placed teams of
League A faced the runners-up of
League B (four ties in March 2025). • The third-placed teams of
League B faced the runners-up of
League C (four ties in March 2025). • The
two best-ranked fourth-placed teams of
League C will face the runners-up of
League D (two ties in March 2026). The teams from the higher leagues were seeded, and will play the second leg at home. In the two-legged ties, the team that scores more goals on aggregate is the winner. If the aggregate score is level,
extra time is played (the
away goals rule is not applied). If the score remains level after extra time, a
penalty shoot-out is used to decide the winner. ==Qualified teams==