diff --git a/src/pages/05_quotation/QuotationForm.vue b/src/pages/05_quotation/QuotationForm.vue
index 94375f0b..2f86fa7f 100644
--- a/src/pages/05_quotation/QuotationForm.vue
+++ b/src/pages/05_quotation/QuotationForm.vue
@@ -147,7 +147,7 @@ const refSelectZoneEmployee = ref<InstanceType<typeof SelectZone>>();
 const mrz = ref<Awaited<ReturnType<typeof parseResultMRZ>>>();
 const toggleWorker = ref(true);
 const tempTableProduct = ref<ProductServiceList[]>([]);
-const tempPaySplitCount = ref(1);
+const tempPaySplitCount = ref(0);
 const tempPaySplit = ref<
   { no: number; amount: number; name?: string; invoice?: boolean }[]
 >([]);
@@ -455,7 +455,7 @@ async function fetchQuotation() {
     const id = currentQuotationId.value || quotationFormData.value.id || '';
 
     await quotationForm.assignFormData(id, quotationFormState.value.mode);
-    tempPaySplitCount.value = quotationFormData.value.paySplitCount || 1;
+    tempPaySplitCount.value = quotationFormData.value.paySplitCount || 0;
     tempPaySplit.value = JSON.parse(
       JSON.stringify(quotationFormData.value.paySplit),
     );
@@ -733,7 +733,7 @@ function triggerProductServiceDialog() {
 function handleChangePayType(type: PayCondition) {
   if (
     type === 'Split' &&
-    tempPaySplitCount.value &&
+    tempPaySplitCount.value !== undefined &&
     tempPaySplit.value &&
     tempTableProduct.value
   ) {
@@ -746,6 +746,11 @@ function handleChangePayType(type: PayCondition) {
       installmentNo: tempTableProduct.value[index].installmentNo || 0,
     }));
   }
+
+  if (type === 'SplitCustom') {
+    quotationFormData.value.paySplitCount = 1;
+    quotationFormData.value.paySplit.push({ no: Number(1), amount: 0 });
+  }
 }
 
 function handleUpdateProductTable(
@@ -844,7 +849,7 @@ function toggleDeleteProduct(index: number) {
 
   // find split count
   tempPaySplitCount.value = Math.max(
-    ...productServiceList.value.map((v) => v.installmentNo || 1),
+    ...productServiceList.value.map((v) => v.installmentNo || 0),
   );
   quotationFormData.value.paySplitCount = tempPaySplitCount.value;
 
@@ -868,7 +873,7 @@ function convertToTable(nodes: Node[]) {
   const list = nodes.flatMap(_recursive).map((v) => v.value);
 
   quotationFormData.value.paySplitCount = Math.max(
-    ...list.map((v) => v.installmentNo || 1),
+    ...list.map((v) => v.installmentNo || 0),
   );
   tempPaySplitCount.value = quotationFormData.value.paySplitCount;
 
@@ -902,7 +907,7 @@ function convertToTable(nodes: Node[]) {
     }));
   } else {
     quotationFormData.value.paySplit = [];
-    quotationFormData.value.paySplitCount = 1;
+    quotationFormData.value.paySplitCount = 0;
     quotationFormData.value.payCondition = 'Full';
   }
 
@@ -2116,7 +2121,7 @@ watch(
               :date="v.date"
               :pay-type="quotationFormData.payCondition"
               :index="i"
-              :pay-split-count="quotationFormData.paySplitCount || 1"
+              :pay-split-count="quotationFormData.paySplitCount || 0"
               @view="
                 () => {
                   selectedInstallmentNo = [v.invoice.installments[0].no];