In addition to Lerums IS, 134 other teams from 27 different countries played in Boys 18. They were divided into 33 different groups, whereof Lerums IS could be found in Group 9 together with TSV Friesen Hänigsen, Tuil and F.C. Beirut. Lerums IS continued to Play off A after reaching 2:nd place in Group 9. In the playoff they made it to 1/32 Final, but lost it against Kärra KIF with 0-1. In the Final, Kampala Junior Team won over GAIS and became the winner of Play off A in Boys 18. Lerums IS also participated in Boys 18 during Gothia Cup 2012. They reached the 1/8 Final in B18 Slutspel B, but lost it against TuS Strudden with 1-2.