diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index 9cb2fdd8823..85c0342df21 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -1082,20 +1082,32 @@ class PaymentEntry(AccountsController):
 			self.base_paid_amount + deductions_to_consider
 		):
 			self.unallocated_amount = (
-				self.base_paid_amount
-				+ deductions_to_consider
-				- self.base_total_allocated_amount
-				- included_taxes
-			) / self.source_exchange_rate
+				flt(
+					(
+						self.base_paid_amount
+						+ deductions_to_consider
+						- self.base_total_allocated_amount
+						- included_taxes
+					),
+					self.precision("unallocated_amount"),
+				)
+				/ self.source_exchange_rate
+			)
 		elif self.payment_type == "Pay" and self.base_total_allocated_amount < (
 			self.base_received_amount - deductions_to_consider
 		):
 			self.unallocated_amount = (
-				self.base_received_amount
-				- deductions_to_consider
-				- self.base_total_allocated_amount
-				- included_taxes
-			) / self.target_exchange_rate
+				flt(
+					(
+						self.base_received_amount
+						- deductions_to_consider
+						- self.base_total_allocated_amount
+						- included_taxes
+					),
+					self.precision("unallocated_amount"),
+				)
+				/ self.target_exchange_rate
+			)
 
 	def set_exchange_gain_loss(self):
 		exchange_gain_loss = flt(