diff --git a/addons/pos_loyalty/static/src/js/Loyalty.js b/addons/pos_loyalty/static/src/js/Loyalty.js
index fb27357377c..8c4d9de6033 100644
--- a/addons/pos_loyalty/static/src/js/Loyalty.js
+++ b/addons/pos_loyalty/static/src/js/Loyalty.js
@@ -1028,7 +1028,7 @@ const PosLoyaltyOrder = (Order) => class PosLoyaltyOrder extends Order {
             if (!discountablePerTax[taxKey]) {
                 discountablePerTax[taxKey] = 0;
             }
-            discountablePerTax[taxKey] += line.price * line.get_quantity();
+            discountablePerTax[taxKey] += line.get_base_price();
         }
         return {discountable, discountablePerTax};
     }
@@ -1164,7 +1164,7 @@ const PosLoyaltyOrder = (Order) => class PosLoyaltyOrder extends Order {
             if (!discountablePerTax[taxKey]) {
                 discountablePerTax[taxKey] = 0;
             }
-            discountablePerTax[taxKey] += (line.price * line.get_quantity()) * (remainingAmountPerLine[line.cid] / line.get_price_with_tax());
+            discountablePerTax[taxKey] += (line.get_base_price()) * (remainingAmountPerLine[line.cid] / line.get_price_with_tax());
         }
         return {discountable, discountablePerTax};
     }