Index: src/include/lib/Garradin/Services/Fees.php
==================================================================
--- src/include/lib/Garradin/Services/Fees.php
+++ src/include/lib/Garradin/Services/Fees.php
@@ -40,10 +40,18 @@
 			if ($row->formula) {
 				$sql = sprintf('SELECT %s FROM membres WHERE id = %d;', $row->formula, $user_id);
 				$row->user_amount = $db->firstColumn($sql);
 			}
 		}
+
+		usort($result, function ($a, $b) {
+			if ($a->user_amount == $b->user_amount) {
+				return 0;
+			}
+
+			return $a->user_amount > $b->user_amount ? 1 : -1;
+		});
 
 		return $result;
 	}
 
 	public function listWithStats()