diff --git a/webapp/src/server/api/routers/order.ts b/webapp/src/server/api/routers/order.ts
index b338ce0c..f505cc2e 100644
--- a/webapp/src/server/api/routers/order.ts
+++ b/webapp/src/server/api/routers/order.ts
@@ -129,11 +129,30 @@ export const orderRouter = createTRPCRouter({
       });
 
       try {
+        const total_amount_to_pay = articles.reduce((acc, currentArticle) => {
+          const articleReference = article_references.find(
+            (ar) => ar.reference === currentArticle.reference
+          );
+
+          if (articleReference) {
+            if (currentArticle.kind === "fixed_price" && currentArticle.price) {
+              return acc + currentArticle.price * articleReference.quantity;
+            } else if (
+              currentArticle.kind === "variable_price" &&
+              input_value
+            ) {
+              return acc + input_value * articleReference.quantity;
+            }
+          }
+          return acc;
+        }, 0);
+
         // CREATION DE LA COMMANDE
         const create_order_payload = createOrderPayload(
           user,
           initialOrder,
-          "CARTECADEAU"
+          "CARTECADEAU",
+          total_amount_to_pay
         );
         const [resultOrder] =
           await ctx.soapObizClient.CREATION_COMMANDE_ARRAYAsync({
diff --git a/webapp/src/utils/obiz.ts b/webapp/src/utils/obiz.ts
index d8b03222..7a34e490 100644
--- a/webapp/src/utils/obiz.ts
+++ b/webapp/src/utils/obiz.ts
@@ -17,7 +17,8 @@ export const obiz_signature = crypto
 export const createOrderPayload = (
   user: User,
   order: Order,
-  kind: "CARTECADEAU" | "EBILLET"
+  kind: "CARTECADEAU" | "EBILLET",
+  total_amount_to_pay: number
 ) => {
   const { street_address, city, zip_code } = extractAddressInformations(
     user.address || ""
@@ -91,7 +92,7 @@ export const createOrderPayload = (
         "",
         `${baseUrl.includes("localhost") ? removeProtocolFromUrl(baseUrl) : baseUrl}/dashboard/order/${order.id}/success`, // url_retour_ok
         `${baseUrl.includes("localhost") ? removeProtocolFromUrl(baseUrl) : baseUrl}/dashboard/order/error`, // url_retour_ko
-        "",
+        total_amount_to_pay,
         "",
         "",
         "",