diff --git a/client/src/containers/Sales/Estimate/EstimateForm.js b/client/src/containers/Sales/Estimate/EstimateForm.js
index 97ead1a26..6a172266f 100644
--- a/client/src/containers/Sales/Estimate/EstimateForm.js
+++ b/client/src/containers/Sales/Estimate/EstimateForm.js
@@ -116,7 +116,13 @@ const EstimateForm = ({
       .label(formatMessage({ id: 'note' })),
     entries: Yup.array().of(
       Yup.object().shape({
-        quantity: Yup.number().nullable(),
+        quantity: Yup.number()
+        .nullable()
+        .when(['rate'], {
+          is: (rate) => rate,
+          then: Yup.number().required(),
+        }),
+        rate: Yup.number().nullable(),
         item_id: Yup.number()
           .nullable()
           .when(['quantity', 'rate'], {
diff --git a/client/src/containers/Sales/Invoice/InvoiceForm.js b/client/src/containers/Sales/Invoice/InvoiceForm.js
index b7f425157..761c7cf38 100644
--- a/client/src/containers/Sales/Invoice/InvoiceForm.js
+++ b/client/src/containers/Sales/Invoice/InvoiceForm.js
@@ -115,7 +115,12 @@ function InvoiceForm({
 
     entries: Yup.array().of(
       Yup.object().shape({
-        quantity: Yup.number().nullable(),
+        quantity: Yup.number()
+          .nullable()
+          .when(['rate'], {
+            is: (rate) => rate,
+            then: Yup.number().required(),
+          }),
         rate: Yup.number().nullable(),
         item_id: Yup.number()
           .nullable()
diff --git a/client/src/containers/Sales/Receipt/ReceiptForm.js b/client/src/containers/Sales/Receipt/ReceiptForm.js
index 14b4b0320..129491b96 100644
--- a/client/src/containers/Sales/Receipt/ReceiptForm.js
+++ b/client/src/containers/Sales/Receipt/ReceiptForm.js
@@ -116,7 +116,12 @@ function ReceiptForm({
 
     entries: Yup.array().of(
       Yup.object().shape({
-        quantity: Yup.number().nullable(),
+        quantity: Yup.number()
+          .nullable()
+          .when(['rate'], {
+            is: (rate) => rate,
+            then: Yup.number().required(),
+          }),
         rate: Yup.number().nullable(),
         item_id: Yup.number()
           .nullable()