División de Honor B is the second level of Spanish league competition for rugby union clubs. The league began in 1998 and consists of three groups (North, East and South) of 8 or 9 teams each. The two top teams of each group and two best 3rd-placed teams qualify for promotion playoff.
The season takes place between October and April. There are three groups of 12 teams, with every team playing each other home and away for a total of 22 matches. Points are awarded according to the following:
For the promotion playoff, the teams are seeded by total points. The draw for the promotion playoff is as follows:
