diff --git a/app/models/group_score.rb b/app/models/group_score.rb
index d7686d3..077b081 100644
--- a/app/models/group_score.rb
+++ b/app/models/group_score.rb
@@ -3,4 +3,8 @@
 class GroupScore < ApplicationRecord
   belongs_to :team
   belongs_to :group
+
+  def difference_in_points
+    scored_points - received_points
+  end
 end