diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index d9ff98132252..06b9d29e69c7 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -21,6 +21,9 @@
 from erpnext.accounts.party import get_party_account, get_party_account_currency
 from erpnext.buying.utils import check_on_hold_or_closed_status, validate_for_items
 from erpnext.controllers.buying_controller import BuyingController
+from erpnext.manufacturing.doctype.blanket_order.blanket_order import (
+	validate_against_blanket_order,
+)
 from erpnext.setup.doctype.item_group.item_group import get_item_group_defaults
 from erpnext.stock.doctype.item.item import get_item_defaults, get_last_purchase_details
 from erpnext.stock.stock_balance import get_ordered_qty, update_bin_qty
@@ -69,7 +72,7 @@ def validate(self):
 		self.validate_with_previous_doc()
 		self.validate_for_subcontracting()
 		self.validate_minimum_order_qty()
-		self.validate_against_blanket_order()
+		validate_against_blanket_order(self)
 
 		if self.is_old_subcontracting_flow:
 			self.validate_bom_for_subcontracting_items()
@@ -198,33 +201,6 @@ def validate_minimum_order_qty(self):
 					).format(item_code, qty, itemwise_min_order_qty.get(item_code))
 				)
 
-	def validate_against_blanket_order(self):
-		po_data = {}
-		for item in self.get("items"):
-			if item.against_blanket_order and item.blanket_order:
-				if item.blanket_order in po_data:
-					if item.item_code in po_data[item.blanket_order]:
-						po_data[item.blanket_order][item.item_code] += item.qty
-					else:
-						po_data[item.blanket_order][item.item_code] = item.qty
-				else:
-					po_data[item.blanket_order] = {item.item_code: item.qty}
-
-		if po_data:
-			allowance = flt(frappe.db.get_single_value("Buying Settings", "over_order_allowance"))
-			for bo_name, item_data in po_data.items():
-				bo_doc = frappe.get_doc("Blanket Order", bo_name)
-				for item in bo_doc.get("items"):
-					if item.item_code in item_data:
-						remaining_qty = item.qty - item.ordered_qty
-						allowed_qty = remaining_qty + (remaining_qty * (allowance / 100))
-						if allowed_qty < item_data[item.item_code]:
-							frappe.throw(
-								_(
-									f"Item {item.item_code} cannot be ordered more than {allowed_qty} against Blanket Order {bo_name}."
-								)
-							)
-
 	def validate_bom_for_subcontracting_items(self):
 		for item in self.items:
 			if not item.bom:
diff --git a/erpnext/manufacturing/doctype/blanket_order/blanket_order.py b/erpnext/manufacturing/doctype/blanket_order/blanket_order.py
index d03f019b0847..32f1c365adef 100644
--- a/erpnext/manufacturing/doctype/blanket_order/blanket_order.py
+++ b/erpnext/manufacturing/doctype/blanket_order/blanket_order.py
@@ -87,3 +87,38 @@ def update_item(source, target, source_parent):
 		},
 	)
 	return target_doc
+
+
+def validate_against_blanket_order(order_doc):
+	if order_doc.doctype in ("Sales Order", "Purchase Order"):
+		order_data = {}
+
+		for item in order_doc.get("items"):
+			if item.against_blanket_order and item.blanket_order:
+				if item.blanket_order in order_data:
+					if item.item_code in order_data[item.blanket_order]:
+						order_data[item.blanket_order][item.item_code] += item.qty
+					else:
+						order_data[item.blanket_order][item.item_code] = item.qty
+				else:
+					order_data[item.blanket_order] = {item.item_code: item.qty}
+
+		if order_data:
+			allowance = flt(
+				frappe.db.get_single_value(
+					"Selling Settings" if order_doc.doctype == "Sales Order" else "Buying Settings",
+					"over_order_allowance",
+				)
+			)
+			for bo_name, item_data in order_data.items():
+				bo_doc = frappe.get_doc("Blanket Order", bo_name)
+				for item in bo_doc.get("items"):
+					if item.item_code in item_data:
+						remaining_qty = item.qty - item.ordered_qty
+						allowed_qty = remaining_qty + (remaining_qty * (allowance / 100))
+						if allowed_qty < item_data[item.item_code]:
+							frappe.throw(
+								_("Item {0} cannot be ordered more than {1} against Blanket Order {2}.").format(
+									item.item_code, allowed_qty, bo_name
+								)
+							)
diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 385d0f3a5856..ee9161bee48e 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -21,6 +21,9 @@
 )
 from erpnext.accounts.party import get_party_account
 from erpnext.controllers.selling_controller import SellingController
+from erpnext.manufacturing.doctype.blanket_order.blanket_order import (
+	validate_against_blanket_order,
+)
 from erpnext.manufacturing.doctype.production_plan.production_plan import (
 	get_items_for_material_requests,
 )
@@ -52,6 +55,7 @@ def validate(self):
 		self.validate_warehouse()
 		self.validate_drop_ship()
 		self.validate_serial_no_based_delivery()
+		validate_against_blanket_order(self)
 		validate_inter_company_party(
 			self.doctype, self.customer, self.company, self.inter_company_order_reference
 		)