Each team will play four matches within their group, using the home-and-away round-robin on double matchdays in September, October, and November 2024.

[1] The winners of both groups will be automatically promoted to the 2026–27 UEFA Nations League C. In addition, the second-placed team of both groups will advance to the promotion play-offs against the two best-ranked fourth-placed teams from League C home-and-away over two legs on March 26 and 31 2026, with the League C teams hosting the second leg.

[4] The seeding pots for the league phase were confirmed on 2 December 2023,[5] and were based on the access list ranking.

[2] The draw for the league phase took place at the Maison de la Mutualité in Paris, France, on 8 February 2024, 18:00 CET.

The fixture list was confirmed by UEFA on 9 February 2024, the day following the draw.