diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 2d45abe..a1144f2 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -375,7 +375,7 @@
 			frappe.throw(_("Cash or Bank Account is mandatory for making payment entry"))
 
 		if flt(self.paid_amount) + flt(self.write_off_amount) \
-				- flt(self.base_grand_total) > 1/(10**(self.precision("base_grand_total") + 1)):
+				- flt(self.grand_total) > 1/(10**(self.precision("grand_total") + 1)):
 			frappe.throw(_("""Paid amount + Write Off Amount can not be greater than Grand Total"""))
 
 
@@ -471,7 +471,7 @@
 			frappe.db.set(self,'paid_amount',0)
 
 		frappe.db.set(self, 'base_paid_amount',
-			flt(self.paid_amount*self.conversion_rate, self.precision("base_paid_amount")))		
+			flt(self.paid_amount*self.conversion_rate, self.precision("base_paid_amount")))
 
 	def check_prev_docstatus(self):
 		for d in self.get('items'):
diff --git a/erpnext/controllers/taxes_and_totals.py b/erpnext/controllers/taxes_and_totals.py
index d4a64f2..49e0bd3 100644
--- a/erpnext/controllers/taxes_and_totals.py
+++ b/erpnext/controllers/taxes_and_totals.py
@@ -283,8 +283,8 @@
 				last_tax.tax_amount += diff
 				last_tax.tax_amount_after_discount_amount += diff
 				last_tax.total += diff
-				
-				self._set_in_company_currency(last_tax, 
+
+				self._set_in_company_currency(last_tax,
 					["total", "tax_amount", "tax_amount_after_discount_amount"])
 
 	def calculate_totals(self):
@@ -319,22 +319,22 @@
 		self.doc.round_floats_in(self.doc, ["grand_total", "base_grand_total"])
 
 		if self.doc.meta.get_field("rounded_total"):
-			self.doc.rounded_total = round_based_on_smallest_currency_fraction(self.doc.grand_total, 
+			self.doc.rounded_total = round_based_on_smallest_currency_fraction(self.doc.grand_total,
 				self.doc.currency, self.doc.precision("rounded_total"))
 		if self.doc.meta.get_field("base_rounded_total"):
 			company_currency = get_company_currency(self.doc.company)
-			
+
 			self.doc.base_rounded_total = \
-				round_based_on_smallest_currency_fraction(self.doc.base_grand_total, 
+				round_based_on_smallest_currency_fraction(self.doc.base_grand_total,
 					company_currency, self.doc.precision("base_rounded_total"))
 
 	def _cleanup(self):
 		for tax in self.doc.get("taxes"):
 			tax.item_wise_tax_detail = json.dumps(tax.item_wise_tax_detail, separators=(',', ':'))
-			
+
 	def set_discount_amount(self):
 		if not self.doc.discount_amount and self.doc.additional_discount_percentage:
-			self.doc.discount_amount = flt(flt(self.doc.get(scrub(self.doc.apply_discount_on))) 
+			self.doc.discount_amount = flt(flt(self.doc.get(scrub(self.doc.apply_discount_on)))
 				* self.doc.additional_discount_percentage / 100, self.doc.precision("discount_amount"))
 
 	def apply_discount_amount(self):
@@ -397,13 +397,13 @@
 				for adv in self.doc.get("advances")])
 
 			self.doc.total_advance = flt(total_allocated_amount, self.doc.precision("total_advance"))
-			
+
 			if self.doc.party_account_currency == self.doc.currency:
 				invoice_total = self.doc.grand_total
 			else:
-				invoice_total = flt(self.doc.grand_total * self.doc.conversion_rate, 
+				invoice_total = flt(self.doc.grand_total * self.doc.conversion_rate,
 					self.doc.precision("grand_total"))
-			
+
 			if invoice_total > 0 and self.doc.total_advance > invoice_total:
 				frappe.throw(_("Advance amount cannot be greater than {0} {1}")
 					.format(self.doc.party_account_currency, invoice_total))
@@ -417,21 +417,23 @@
 		# total_advance is only for non POS Invoice
 		if self.doc.is_return:
 			return
-		
+
 		self.doc.round_floats_in(self.doc, ["grand_total", "total_advance", "write_off_amount"])
+		self._set_in_company_currency(self.doc, ['write_off_amount'])
+
 		if self.doc.party_account_currency == self.doc.currency:
-			total_amount_to_pay = flt(self.doc.grand_total  - self.doc.total_advance 
+			total_amount_to_pay = flt(self.doc.grand_total  - self.doc.total_advance
 				- flt(self.doc.write_off_amount), self.doc.precision("grand_total"))
 		else:
 			total_amount_to_pay = flt(flt(self.doc.grand_total *
-				self.doc.conversion_rate, self.doc.precision("grand_total")) - self.doc.total_advance 
+				self.doc.conversion_rate, self.doc.precision("grand_total")) - self.doc.total_advance
 					- flt(self.doc.base_write_off_amount), self.doc.precision("grand_total"))
-			
+
 		if self.doc.doctype == "Sales Invoice":
 			self.doc.round_floats_in(self.doc, ["paid_amount"])
 			paid_amount = self.doc.paid_amount \
 				if self.doc.party_account_currency == self.doc.currency else self.doc.base_paid_amount
-			self.doc.outstanding_amount = flt(total_amount_to_pay - flt(paid_amount), 
+			self.doc.outstanding_amount = flt(total_amount_to_pay - flt(paid_amount),
 				self.doc.precision("outstanding_amount"))
 		elif self.doc.doctype == "Purchase Invoice":
-			self.doc.outstanding_amount = flt(total_amount_to_pay, self.doc.precision("outstanding_amount"))
\ No newline at end of file
+			self.doc.outstanding_amount = flt(total_amount_to_pay, self.doc.precision("outstanding_amount"))