The Volta a Catalunya is part of the UCI World Tour, which meant that the 17 UCI WorldTeams were automatically invited and obliged to send a team. The race organisers also made seven wildcard invitations to UCI Professional Continental teams. The peloton was therefore made up of 24 teams.[6]
In the 2015 Volta a Catalunya, four different jerseys were awarded. For the general classification, calculated by adding each cyclist's finishing times on each stage, and allowing time bonuses in intermediate sprints (3, 2 and 1 seconds) and at the finish in mass-start stages (10, 6 and 4 seconds respectively for the first three finishers), the leader received a white and green jersey. This classification was considered the most important of the 2015 Volta a Catalunya, and the winner of the classification was considered the winner of the race.
Additionally, there was a sprints classification, which awarded a white jersey. In the sprints classification, cyclists received points for finishing in the top 3 at intermediate sprint points during each stage; these intermediate sprints also offered bonus seconds towards the general classification. There was also a mountains classification, the leadership of which was marked by a red jersey. In the mountains classification, points were won by reaching the top of a climb before other cyclists, with more points available for the higher-categorised climbs.
There was also a classification for teams, in which the times of the best three cyclists per team on each stage were added together; the leading team at the end of the race was the team with the lowest total time.