fix: Calculate depreciation_amount accurately (#27585)

erpnext/accounts/doctype/gl_entry/gl_entry.py

@@ -58,7 +58,8 @@ class GLEntry(Document):
 
 			# Update outstanding amt on against voucher
 			if (self.against_voucher_type in ['Journal Entry', 'Sales Invoice', 'Purchase Invoice', 'Fees']
-				and self.against_voucher and self.flags.update_outstanding == 'Yes'):
+				and self.against_voucher and self.flags.update_outstanding == 'Yes'
+				and not frappe.flags.is_reverse_depr_entry):
 					update_outstanding_amt(self.account, self.party_type, self.party, self.against_voucher_type,
 						self.against_voucher)
 

erpnext/accounts/doctype/journal_entry/journal_entry.py

@@ -58,7 +58,10 @@ class JournalEntry(AccountsController):
 		if not frappe.flags.in_import:
 			self.validate_total_debit_and_credit()
 
+		if not frappe.flags.is_reverse_depr_entry:
 			self.validate_against_jv()
+			self.validate_stock_accounts()
+
 		self.validate_reference_doc()
 		if self.docstatus == 0:
 			self.set_against_account()
@@ -69,7 +72,6 @@ class JournalEntry(AccountsController):
 		self.validate_empty_accounts_table()
 		self.set_account_and_party_balance()
 		self.validate_inter_company_accounts()
-		self.validate_stock_accounts()
 
 		if self.docstatus == 0:
 			self.apply_tax_withholding()

erpnext/accounts/doctype/sales_invoice/sales_invoice.py

@@ -37,7 +37,7 @@ from erpnext.assets.doctype.asset.depreciation import (
 	get_disposal_account_and_cost_center,
 	get_gl_entries_on_asset_disposal,
 	get_gl_entries_on_asset_regain,
-	post_depreciation_entries,
+	make_depreciation_entry,
 )
 from erpnext.controllers.selling_controller import SellingController
 from erpnext.projects.doctype.timesheet.timesheet import get_projectwise_timesheet_data
@@ -934,6 +934,7 @@ class SalesInvoice(SellingController):
 						asset.db_set("disposal_date", None)
 
 						if asset.calculate_depreciation:
+							self.reverse_depreciation_entry_made_after_sale(asset)
 							self.reset_depreciation_schedule(asset)
 
 					else:
@@ -997,22 +998,20 @@ class SalesInvoice(SellingController):
 
 	def depreciate_asset(self, asset):
 		asset.flags.ignore_validate_update_after_submit = True
-		asset.prepare_depreciation_data(self.posting_date)
+		asset.prepare_depreciation_data(date_of_sale=self.posting_date)
 		asset.save()
 
-		post_depreciation_entries(self.posting_date)
+		make_depreciation_entry(asset.name, self.posting_date)
 
 	def reset_depreciation_schedule(self, asset):
 		asset.flags.ignore_validate_update_after_submit = True
 
 		# recreate original depreciation schedule of the asset
-		asset.prepare_depreciation_data()
+		asset.prepare_depreciation_data(date_of_return=self.posting_date)
 
 		self.modify_depreciation_schedule_for_asset_repairs(asset)
 		asset.save()
 
-		self.delete_depreciation_entry_made_after_sale(asset)
-
 	def modify_depreciation_schedule_for_asset_repairs(self, asset):
 		asset_repairs = frappe.get_all(
 			'Asset Repair',
@@ -1026,7 +1025,7 @@ class SalesInvoice(SellingController):
 				asset_repair.modify_depreciation_schedule()
 				asset.prepare_depreciation_data()
 
-	def delete_depreciation_entry_made_after_sale(self, asset):
+	def reverse_depreciation_entry_made_after_sale(self, asset):
 		from erpnext.accounts.doctype.journal_entry.journal_entry import make_reverse_journal_entry
 
 		posting_date_of_original_invoice = self.get_posting_date_of_sales_invoice()
@@ -1041,11 +1040,19 @@ class SalesInvoice(SellingController):
 				row += 1
 
 			if schedule.schedule_date == posting_date_of_original_invoice:
-				if not self.sale_was_made_on_original_schedule_date(asset, schedule, row, posting_date_of_original_invoice):
+				if not self.sale_was_made_on_original_schedule_date(asset, schedule, row, posting_date_of_original_invoice) \
+					or self.sale_happens_in_the_future(posting_date_of_original_invoice):
+
 					reverse_journal_entry = make_reverse_journal_entry(schedule.journal_entry)
 					reverse_journal_entry.posting_date = nowdate()
+					frappe.flags.is_reverse_depr_entry = True
 					reverse_journal_entry.submit()
 
+					frappe.flags.is_reverse_depr_entry = False
+					asset.flags.ignore_validate_update_after_submit = True
+					schedule.journal_entry = None
+					asset.save()
+
 	def get_posting_date_of_sales_invoice(self):
 		return frappe.db.get_value('Sales Invoice', self.return_against, 'posting_date')
 
@@ -1060,6 +1067,12 @@ class SalesInvoice(SellingController):
 					return True
 		return False
 
+	def sale_happens_in_the_future(self, posting_date_of_original_invoice):
+		if posting_date_of_original_invoice > getdate():
+			return True
+
+		return False
+
 	@property
 	def enable_discount_accounting(self):
 		if not hasattr(self, "_enable_discount_accounting"):

erpnext/accounts/doctype/sales_invoice/test_sales_invoice.py

@@ -2237,9 +2237,9 @@ class TestSalesInvoice(unittest.TestCase):
 		check_gl_entries(self, si.name, expected_gle, add_days(nowdate(), -1))
 		enable_discount_accounting(enable=0)
 
-	def test_asset_depreciation_on_sale(self):
+	def test_asset_depreciation_on_sale_with_pro_rata(self):
 		"""
-			Tests if an Asset set to depreciate yearly on June 30, that gets sold on Sept 30, creates an additional depreciation entry on Sept 30.
+			Tests if an Asset set to depreciate yearly on June 30, that gets sold on Sept 30, creates an additional depreciation entry on its date of sale.
 		"""
 
 		create_asset_data()
@@ -2252,7 +2252,7 @@ class TestSalesInvoice(unittest.TestCase):
 		expected_values = [
 			["2020-06-30", 1311.48, 1311.48],
 			["2021-06-30", 20000.0, 21311.48],
-			["2021-09-30", 3966.76, 25278.24]
+			["2021-09-30", 5041.1, 26352.58]
 		]
 
 		for i, schedule in enumerate(asset.schedules):
@@ -2261,6 +2261,59 @@ class TestSalesInvoice(unittest.TestCase):
 			self.assertEqual(expected_values[i][2], schedule.accumulated_depreciation_amount)
 			self.assertTrue(schedule.journal_entry)
 
+	def test_asset_depreciation_on_sale_without_pro_rata(self):
+		"""
+			Tests if an Asset set to depreciate yearly on Dec 31, that gets sold on Dec 31 after two years, created an additional depreciation entry on its date of sale.
+		"""
+
+		create_asset_data()
+		asset = create_asset(item_code="Macbook Pro", calculate_depreciation=1,
+			available_for_use_date=getdate("2019-12-31"), total_number_of_depreciations=3,
+			expected_value_after_useful_life=10000, depreciation_start_date=getdate("2020-12-31"), submit=1)
+
+		post_depreciation_entries(getdate("2021-09-30"))
+
+		create_sales_invoice(item_code="Macbook Pro", asset=asset.name, qty=1, rate=90000, posting_date=getdate("2021-12-31"))
+		asset.load_from_db()
+
+		expected_values = [
+			["2020-12-31", 30000, 30000],
+			["2021-12-31", 30000, 60000]
+		]
+
+		for i, schedule in enumerate(asset.schedules):
+			self.assertEqual(getdate(expected_values[i][0]), schedule.schedule_date)
+			self.assertEqual(expected_values[i][1], schedule.depreciation_amount)
+			self.assertEqual(expected_values[i][2], schedule.accumulated_depreciation_amount)
+			self.assertTrue(schedule.journal_entry)
+
+	def test_depreciation_on_return_of_sold_asset(self):
+		from erpnext.controllers.sales_and_purchase_return import make_return_doc
+
+		create_asset_data()
+		asset = create_asset(item_code="Macbook Pro", calculate_depreciation=1, submit=1)
+		post_depreciation_entries(getdate("2021-09-30"))
+
+		si = create_sales_invoice(item_code="Macbook Pro", asset=asset.name, qty=1, rate=90000, posting_date=getdate("2021-09-30"))
+		return_si = make_return_doc("Sales Invoice", si.name)
+		return_si.submit()
+		asset.load_from_db()
+
+		expected_values = [
+			["2020-06-30", 1311.48, 1311.48, True],
+			["2021-06-30", 20000.0, 21311.48, True],
+			["2022-06-30", 20000.0, 41311.48, False],
+			["2023-06-30", 20000.0, 61311.48, False],
+			["2024-06-30",  20000.0, 81311.48,  False],
+			["2025-06-06",  18688.52,  100000.0, False]
+		]
+
+		for i, schedule in enumerate(asset.schedules):
+			self.assertEqual(getdate(expected_values[i][0]), schedule.schedule_date)
+			self.assertEqual(expected_values[i][1], schedule.depreciation_amount)
+			self.assertEqual(expected_values[i][2], schedule.accumulated_depreciation_amount)
+			self.assertEqual(schedule.journal_entry, schedule.journal_entry)
+
 	def test_sales_invoice_against_supplier(self):
 		from erpnext.accounts.doctype.opening_invoice_creation_tool.test_opening_invoice_creation_tool import (
 			make_customer,

erpnext/assets/doctype/asset/asset.py

@@ -75,12 +75,12 @@ class Asset(AccountsController):
 		if self.is_existing_asset and self.purchase_invoice:
 			frappe.throw(_("Purchase Invoice cannot be made against an existing asset {0}").format(self.name))
 
-	def prepare_depreciation_data(self, date_of_sale=None):
+	def prepare_depreciation_data(self, date_of_sale=None, date_of_return=None):
 		if self.calculate_depreciation:
 			self.value_after_depreciation = 0
 			self.set_depreciation_rate()
 			self.make_depreciation_schedule(date_of_sale)
-			self.set_accumulated_depreciation(date_of_sale)
+			self.set_accumulated_depreciation(date_of_sale, date_of_return)
 		else:
 			self.finance_books = []
 			self.value_after_depreciation = (flt(self.gross_purchase_amount) -
@@ -182,7 +182,7 @@ class Asset(AccountsController):
 				d.precision("rate_of_depreciation"))
 
 	def make_depreciation_schedule(self, date_of_sale):
-		if 'Manual' not in [d.depreciation_method for d in self.finance_books] and not self.schedules:
+		if 'Manual' not in [d.depreciation_method for d in self.finance_books] and not self.get('schedules'):
 			self.schedules = []
 
 		if not self.available_for_use_date:
@@ -232,6 +232,7 @@ class Asset(AccountsController):
 					depreciation_amount, days, months = self.get_pro_rata_amt(d, depreciation_amount,
 						from_date, date_of_sale)
 
+					if depreciation_amount > 0:
 						self.append("schedules", {
 							"schedule_date": date_of_sale,
 							"depreciation_amount": depreciation_amount,
@@ -239,6 +240,7 @@ class Asset(AccountsController):
 							"finance_book": d.finance_book,
 							"finance_book_id": d.idx
 						})
+
 					break
 
 				# For first row
@@ -257,11 +259,15 @@ class Asset(AccountsController):
 						self.to_date = add_months(self.available_for_use_date,
 							n * cint(d.frequency_of_depreciation))
 
+					depreciation_amount_without_pro_rata = depreciation_amount
+
 					depreciation_amount, days, months = self.get_pro_rata_amt(d,
 						depreciation_amount, schedule_date, self.to_date)
 
-					monthly_schedule_date = add_months(schedule_date, 1)
+					depreciation_amount = self.get_adjusted_depreciation_amount(depreciation_amount_without_pro_rata,
+						depreciation_amount, d.finance_book)
 
+					monthly_schedule_date = add_months(schedule_date, 1)
 					schedule_date = add_days(schedule_date, days)
 					last_schedule_date = schedule_date
 
@@ -397,7 +403,28 @@ class Asset(AccountsController):
 			frappe.throw(_("Depreciation Row {0}: Next Depreciation Date cannot be before Available-for-use Date")
 				.format(row.idx))
 
-	def set_accumulated_depreciation(self, date_of_sale=None, ignore_booked_entry = False):
+	# to ensure that final accumulated depreciation amount is accurate
+	def get_adjusted_depreciation_amount(self, depreciation_amount_without_pro_rata, depreciation_amount_for_last_row, finance_book):
+		depreciation_amount_for_first_row = self.get_depreciation_amount_for_first_row(finance_book)
+
+		if depreciation_amount_for_first_row + depreciation_amount_for_last_row != depreciation_amount_without_pro_rata:
+			depreciation_amount_for_last_row = depreciation_amount_without_pro_rata - depreciation_amount_for_first_row
+
+		return depreciation_amount_for_last_row
+
+	def get_depreciation_amount_for_first_row(self, finance_book):
+		if self.has_only_one_finance_book():
+			return self.schedules[0].depreciation_amount
+		else:
+			for schedule in self.schedules:
+				if schedule.finance_book == finance_book:
+					return schedule.depreciation_amount
+
+	def has_only_one_finance_book(self):
+		if len(self.finance_books) == 1:
+			return True
+
+	def set_accumulated_depreciation(self, date_of_sale=None, date_of_return=None, ignore_booked_entry = False):
 		straight_line_idx = [d.idx for d in self.get("schedules") if d.depreciation_method == 'Straight Line']
 		finance_books = []
 
@@ -414,7 +441,7 @@ class Asset(AccountsController):
 			value_after_depreciation -= flt(depreciation_amount)
 
 			# for the last row, if depreciation method = Straight Line
-			if straight_line_idx and i == max(straight_line_idx) - 1 and not date_of_sale:
+			if straight_line_idx and i == max(straight_line_idx) - 1 and not date_of_sale and not date_of_return:
 				book = self.get('finance_books')[cint(d.finance_book_id) - 1]
 				depreciation_amount += flt(value_after_depreciation -
 					flt(book.expected_value_after_useful_life), d.precision("depreciation_amount"))
@@ -833,7 +860,7 @@ def get_depreciation_amount(asset, depreciable_value, row):
 	if row.depreciation_method in ("Straight Line", "Manual"):
 		# if the Depreciation Schedule is being prepared for the first time
 		if not asset.flags.increase_in_asset_life:
-			depreciation_amount = (flt(row.value_after_depreciation) -
+			depreciation_amount = (flt(asset.gross_purchase_amount) - flt(asset.opening_accumulated_depreciation) -
 				flt(row.expected_value_after_useful_life)) / depreciation_left
 
 		# if the Depreciation Schedule is being modified after Asset Repair

erpnext/regional/india/utils.py

@@ -855,7 +855,7 @@ def get_depreciation_amount(asset, depreciable_value, row):
 	if row.depreciation_method in ("Straight Line", "Manual"):
 		# if the Depreciation Schedule is being prepared for the first time
 		if not asset.flags.increase_in_asset_life:
-			depreciation_amount = (flt(row.value_after_depreciation) -
+			depreciation_amount = (flt(asset.gross_purchase_amount) - flt(asset.opening_accumulated_depreciation) -
 				flt(row.expected_value_after_useful_life)) / depreciation_left
 
 		# if the Depreciation Schedule is being modified after Asset Repair