In the 2018 Volta ao Algarve, four different jerseys were awarded. For the general classification, calculated by adding each cyclist's finishing times on each stage, and allowing time bonuses for the first three finishers at intermediate sprints and at the finish of mass-start stages, the leader received a yellow jersey.[11] This classification was considered the most important of the 2018 Volta ao Algarve, and the winner of the classification was considered the winner of the race.
Additionally, there was a points classification, which awarded a red jersey.[11] In the points classification, cyclists received points for finishing in the top 10 in a mass-start stage. For winning a stage, a rider earned 25 points, with 20 for second, 16 for third, 13 for fourth, 10 for fifth, 8 for sixth, 6 for seventh, 4 for eighth, 2 for ninth and 1 for tenth place. Points towards the classification could also be accrued 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 blue jersey.[11] 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.
The fourth jersey represented the young rider classification, marked by a white jersey.[11] This was decided in the same way as the general classification, but only riders born after 1 January 1995 were eligible to be ranked in the classification. 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.