diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.js b/erpnext/accounts/doctype/payment_entry/payment_entry.js
index 439b1ed..d96bc27 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.js
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.js
@@ -533,8 +533,8 @@
 	source_exchange_rate: function(frm) {
 		if (frm.doc.paid_amount) {
 			frm.set_value("base_paid_amount", flt(frm.doc.paid_amount) * flt(frm.doc.source_exchange_rate));
-			if(!frm.set_paid_amount_based_on_received_amount &&
-					(frm.doc.paid_from_account_currency == frm.doc.paid_to_account_currency)) {
+			// target exchange rate should always be same as source if both account currencies is same
+			if(frm.doc.paid_from_account_currency == frm.doc.paid_to_account_currency) {
 				frm.set_value("target_exchange_rate", frm.doc.source_exchange_rate);
 				frm.set_value("base_received_amount", frm.doc.base_paid_amount);
 			}
diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.py b/erpnext/accounts/doctype/payment_entry/payment_entry.py
index 46904f7..a131a81 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.py
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.py
@@ -55,8 +55,9 @@
 		self.validate_mandatory()
 		self.validate_reference_documents()
 		self.set_tax_withholding()
-		self.apply_taxes()
 		self.set_amounts()
+		self.validate_amounts()
+		self.apply_taxes()
 		self.clear_unallocated_reference_document_rows()
 		self.validate_payment_against_negative_invoice()
 		self.validate_transaction_reference()
@@ -236,7 +237,9 @@
 						self.company_currency, self.posting_date)
 
 	def set_target_exchange_rate(self, ref_doc=None):
-		if self.paid_to and not self.target_exchange_rate:
+		if self.paid_from_account_currency == self.paid_to_account_currency:
+			self.target_exchange_rate = self.source_exchange_rate
+		elif self.paid_to and not self.target_exchange_rate:
 			if ref_doc:
 				if self.paid_to_account_currency == ref_doc.currency:
 					self.target_exchange_rate = ref_doc.get("exchange_rate")
@@ -473,6 +476,14 @@
 		self.set_unallocated_amount()
 		self.set_difference_amount()
 
+	def validate_amounts(self):
+		self.validate_received_amount()
+	
+	def validate_received_amount(self):
+		if self.paid_from_account_currency == self.paid_to_account_currency:
+			if self.paid_amount != self.received_amount:
+				frappe.throw(_("Received Amount cannot be greater than Paid Amount"))
+
 	def set_received_amount(self):
 		self.base_received_amount = self.base_paid_amount