feat: Enable discount accounting

erpnext/accounts/doctype/accounts_settings/accounts_settings.json

@@ -20,6 +20,7 @@
   "book_asset_depreciation_entry_automatically",
   "unlink_advance_payment_on_cancelation_of_order",
   "post_change_gl_entries",
+  "enable_discount_accounting",
   "tax_settings_section",
   "determine_address_tax_category_from",
   "column_break_19",
@@ -260,6 +261,13 @@
    "fieldname": "post_change_gl_entries",
    "fieldtype": "Check",
    "label": "Create Ledger Entries for Change Amount"
+  },
+  {
+   "default": "0",
+   "description": "If enabled, additional ledger entries will be made for discounts in a separate Discount Account",
+   "fieldname": "enable_discount_accounting",
+   "fieldtype": "Check",
+   "label": "Enable Discount Accounting"
   }
  ],
  "icon": "icon-cog",

erpnext/accounts/doctype/accounts_settings/accounts_settings.py

@@ -21,6 +21,7 @@ def validate(self):
 
 		self.validate_stale_days()
 		self.enable_payment_schedule_in_print()
+		self.toggle_discount_accounting_fields()
 
 	def validate_stale_days(self):
 		if not self.allow_stale and cint(self.stale_days) <= 0:
@@ -33,3 +34,22 @@ def enable_payment_schedule_in_print(self):
 		for doctype in ("Sales Order", "Sales Invoice", "Purchase Order", "Purchase Invoice"):
 			make_property_setter(doctype, "due_date", "print_hide", show_in_print, "Check", validate_fields_for_doctype=False)
 			make_property_setter(doctype, "payment_schedule", "print_hide",  0 if show_in_print else 1, "Check", validate_fields_for_doctype=False)
+
+	def toggle_discount_accounting_fields(self):
+		enable_discount_accounting = cint(self.enable_discount_accounting)
+
+		for doctype in ["Sales Invoice Item", "Purchase Invoice Item"]:
+			make_property_setter(doctype, "discount_account", "hidden", not(enable_discount_accounting), "Check", validate_fields_for_doctype=False)
+			if enable_discount_accounting:
+				make_property_setter(doctype, "discount_account", "mandatory_depends_on", "eval: doc.discount_amount", "Code", validate_fields_for_doctype=False)
+			else:
+				make_property_setter(doctype, "discount_account", "mandatory_depends_on", "", "Code", validate_fields_for_doctype=False)
+
+		for doctype in ["Sales Invoice", "Purchase Invoice"]:
+			make_property_setter(doctype, "additional_discount_account", "hidden", not(enable_discount_accounting), "Check", validate_fields_for_doctype=False)
+			if enable_discount_accounting:
+				make_property_setter(doctype, "additional_discount_account", "mandatory_depends_on", "eval: doc.discount_amount", "Code", validate_fields_for_doctype=False)
+			else:
+				make_property_setter(doctype, "additional_discount_account", "mandatory_depends_on", "", "Code", validate_fields_for_doctype=False)
+
+		make_property_setter("Item", "default_discount_account", "hidden", not(enable_discount_accounting), "Check", validate_fields_for_doctype=False)

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.js

@@ -366,7 +366,7 @@ erpnext.accounts.PurchaseInvoice = class PurchaseInvoice extends erpnext.buying.
 	items_add(doc, cdt, cdn) {
 		var row = frappe.get_doc(cdt, cdn);
 		this.frm.script_manager.copy_from_first_row("items", row,
-			["expense_account", "cost_center", "project"]);
+			["expense_account", "discount_account", "cost_center", "project"]);
 	}
 
 	on_submit() {
@@ -500,6 +500,16 @@ frappe.ui.form.on("Purchase Invoice", {
 			'Payment Entry': 'Payment'
 		}
 
+		frm.set_query("additional_discount_account", function() {
+			return {
+				filters: {
+					company: frm.doc.company,
+					is_group: 0,
+					report_type: "Profit and Loss",
+				}
+			};
+		});
+
 		frm.fields_dict['items'].grid.get_field('deferred_expense_account').get_query = function(doc) {
 			return {
 				filters: {
@@ -509,6 +519,16 @@ frappe.ui.form.on("Purchase Invoice", {
 				}
 			}
 		}
+
+		frm.fields_dict['items'].grid.get_field('discount_account').get_query = function(doc) {
+			return {
+				filters: {
+					'report_type': 'Profit and Loss',
+					'company': doc.company,
+					"is_group": 0
+				}
+			}
+		}
 	},
 
 	refresh: function(frm) {

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.json

@@ -96,6 +96,7 @@
   "section_break_44",
   "apply_discount_on",
   "base_discount_amount",
+  "additional_discount_account",
   "column_break_46",
   "additional_discount_percentage",
   "discount_amount",
@@ -1691,9 +1692,13 @@
    "label": "Per Received",
    "no_copy": 1,
    "print_hide": 1,
-   "read_only": 1,
-   "show_days": 1,
-   "show_seconds": 1
+   "read_only": 1
+  },
+  {
+   "fieldname": "additional_discount_account",
+   "fieldtype": "Link",
+   "label": "Additional Discount Account",
+   "options": "Account"
   },
   {
    "default": "0",

erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py

@@ -448,6 +448,7 @@ def get_gl_entries(self, warehouse_account=None):
 
 		self.make_supplier_gl_entry(gl_entries)
 		self.make_item_gl_entries(gl_entries)
+		self.make_discount_gl_entries(gl_entries)
 
 		if self.check_asset_cwip_enabled():
 			self.get_asset_gl_entry(gl_entries)
@@ -521,7 +522,7 @@ def make_item_gl_entries(self, gl_entries):
 			and flt(d.base_tax_amount_after_discount_amount)]
 
 		exchange_rate_map, net_rate_map = get_purchase_document_details(self)
-
+		
 		for item in self.get("items"):
 			if flt(item.base_net_amount):
 				account_currency = get_account_currency(item.expense_account)
@@ -612,7 +613,7 @@ def make_item_gl_entries(self, gl_entries):
 						if (not item.enable_deferred_expense or self.is_return) else item.deferred_expense_account)
 
 					if not item.is_fixed_asset:
-						amount = flt(item.base_net_amount, item.precision("base_net_amount"))
+						dummy, amount = self.get_amount_and_base_amount(item, self.enable_discount_accounting)
 					else:
 						amount = flt(item.base_net_amount + item.item_tax_amount, item.precision("base_net_amount"))
 
@@ -854,8 +855,10 @@ def make_stock_adjustment_entry(self, gl_entries, item, voucher_wise_stock_value
 	def make_tax_gl_entries(self, gl_entries):
 		# tax table gl entries
 		valuation_tax = {}
+
 		for tax in self.get("taxes"):
-			if tax.category in ("Total", "Valuation and Total") and flt(tax.base_tax_amount_after_discount_amount):
+			amount, base_amount = self.get_tax_amounts(tax, self.enable_discount_accounting)
+			if tax.category in ("Total", "Valuation and Total") and flt(base_amount):
 				account_currency = get_account_currency(tax.account_head)
 
 				dr_or_cr = "debit" if tax.add_deduct_tax == "Add" else "credit"
@@ -864,21 +867,21 @@ def make_tax_gl_entries(self, gl_entries):
 					self.get_gl_dict({
 						"account": tax.account_head,
 						"against": self.supplier,
-						dr_or_cr: tax.base_tax_amount_after_discount_amount,
-						dr_or_cr + "_in_account_currency": tax.base_tax_amount_after_discount_amount \
-							if account_currency==self.company_currency \
-							else tax.tax_amount_after_discount_amount,
+						dr_or_cr: base_amount,
+						dr_or_cr + "_in_account_currency": base_amount
+							if account_currency==self.company_currency
+							else amount,
 						"cost_center": tax.cost_center
 					}, account_currency, item=tax)
 				)
 			# accumulate valuation tax
-			if self.is_opening == "No" and tax.category in ("Valuation", "Valuation and Total") and flt(tax.base_tax_amount_after_discount_amount) \
+			if self.is_opening == "No" and tax.category in ("Valuation", "Valuation and Total") and flt(base_amount) \
 				and not self.is_internal_transfer():
 				if self.auto_accounting_for_stock and not tax.cost_center:
 					frappe.throw(_("Cost Center is required in row {0} in Taxes table for type {1}").format(tax.idx, _(tax.category)))
 				valuation_tax.setdefault(tax.name, 0)
 				valuation_tax[tax.name] += \
-					(tax.add_deduct_tax == "Add" and 1 or -1) * flt(tax.base_tax_amount_after_discount_amount)
+					(tax.add_deduct_tax == "Add" and 1 or -1) * flt(base_amount)
 
 		if self.is_opening == "No" and self.negative_expense_to_be_booked and valuation_tax:
 			# credit valuation tax amount in "Expenses Included In Valuation"
@@ -919,6 +922,13 @@ def make_tax_gl_entries(self, gl_entries):
 							"remarks": self.remarks or "Accounting Entry for Stock"
 						}, item=tax))
 
+	@property
+	def enable_discount_accounting(self):
+		if not hasattr(self, "_enable_discount_accounting"):
+			self._enable_discount_accounting = cint(frappe.db.get_single_value('Accounts Settings', 'enable_discount_accounting'))
+
+		return self._enable_discount_accounting
+
 	def make_internal_transfer_gl_entries(self, gl_entries):
 		if self.is_internal_transfer() and flt(self.base_total_taxes_and_charges):
 			account_currency = get_account_currency(self.unrealized_profit_loss_account)

erpnext/accounts/doctype/purchase_invoice/test_purchase_invoice.py

@@ -251,6 +251,50 @@ def test_purchase_invoice_with_exchange_rate_difference(self):
 
 		self.assertEqual(discrepancy_caused_by_exchange_rate_diff, amount)
 
+	def test_purchase_invoice_with_discount_accounting_enabled(self):
+		enable_discount_accounting()
+
+		discount_account = create_account(account_name="Discount Account",
+			parent_account="Indirect Expenses - _TC", company="_Test Company")
+		pi = make_purchase_invoice(discount_account=discount_account, rate=45)
+
+		expected_gle = [
+			["_Test Account Cost for Goods Sold - _TC", 250.0, 0.0, nowdate()],
+			["Creditors - _TC", 0.0, 225.0, nowdate()],
+			["Discount Account - _TC", 0.0, 25.0, nowdate()]
+		]
+
+		check_gl_entries(self, pi.name, expected_gle, nowdate())
+		enable_discount_accounting(enable=0)
+
+	def test_additional_discount_for_purchase_invoice_with_discount_accounting_enabled(self):
+		enable_discount_accounting()
+		additional_discount_account = create_account(account_name="Discount Account",
+			parent_account="Indirect Expenses - _TC", company="_Test Company")
+
+		pi = make_purchase_invoice(do_not_save=1, parent_cost_center="Main - _TC")
+		pi.apply_discount_on = "Grand Total"
+		pi.additional_discount_account = additional_discount_account
+		pi.additional_discount_percentage = 10
+		pi.disable_rounded_total = 1
+		pi.append("taxes", {
+			"charge_type": "On Net Total",
+			"account_head": "_Test Account VAT - _TC",
+			"cost_center": "Main - _TC",
+			"description": "Test",
+			"rate": 10
+		})
+		pi.submit()
+
+		expected_gle = [
+			["_Test Account Cost for Goods Sold - _TC", 250.0, 0.0, nowdate()],
+			["_Test Account VAT - _TC", 25.0, 0.0, nowdate()],
+			["Creditors - _TC", 0.0, 247.5, nowdate()],
+			["Discount Account - _TC", 0.0, 27.5, nowdate()]
+		]
+
+		check_gl_entries(self, pi.name, expected_gle, nowdate())
+
 	def test_purchase_invoice_change_naming_series(self):
 		pi = frappe.copy_doc(test_records[1])
 		pi.insert()
@@ -1161,6 +1205,18 @@ def test_purchase_invoice_advance_taxes(self):
 			self.assertEqual(expected_gle[i][0], gle.account)
 			self.assertEqual(expected_gle[i][1], gle.amount)
 
+def check_gl_entries(doc, voucher_no, expected_gle, posting_date):
+	gl_entries = frappe.db.sql("""select account, debit, credit, posting_date
+		from `tabGL Entry`
+		where voucher_type='Purchase Invoice' and voucher_no=%s and posting_date >= %s
+		order by posting_date asc, account asc""", (voucher_no, posting_date), as_dict=1)
+
+	for i, gle in enumerate(gl_entries):
+		doc.assertEqual(expected_gle[i][0], gle.account)
+		doc.assertEqual(expected_gle[i][1], gle.debit)
+		doc.assertEqual(expected_gle[i][2], gle.credit)
+		doc.assertEqual(getdate(expected_gle[i][3]), gle.posting_date)
+
 def update_tax_witholding_category(company, account, date):
 	from erpnext.accounts.utils import get_fiscal_year
 
@@ -1191,6 +1247,11 @@ def unlink_payment_on_cancel_of_invoice(enable=1):
 	accounts_settings.unlink_payment_on_cancellation_of_invoice = enable
 	accounts_settings.save()
 
+def enable_discount_accounting(enable=1):
+	accounts_settings = frappe.get_doc("Accounts Settings")
+	accounts_settings.enable_discount_accounting = enable
+	accounts_settings.save()
+
 def make_purchase_invoice(**args):
 	pi = frappe.new_doc("Purchase Invoice")
 	args = frappe._dict(args)
@@ -1213,6 +1274,7 @@ def make_purchase_invoice(**args):
 	pi.return_against = args.return_against
 	pi.is_subcontracted = args.is_subcontracted or "No"
 	pi.supplier_warehouse = args.supplier_warehouse or "_Test Warehouse 1 - _TC"
+	pi.cost_center = args.parent_cost_center
 
 	pi.append("items", {
 		"item_code": args.item or args.item_code or "_Test Item",
@@ -1221,7 +1283,10 @@ def make_purchase_invoice(**args):
 		"received_qty": args.received_qty or 0,
 		"rejected_qty": args.rejected_qty or 0,
 		"rate": args.rate or 50,
-		'expense_account': args.expense_account or '_Test Account Cost for Goods Sold - _TC',
+		"price_list_rate": args.price_list_rate or 50,
+		"expense_account": args.expense_account or '_Test Account Cost for Goods Sold - _TC',
+		"discount_account": args.discount_account or None,
+		"discount_amount": args.discount_amount or 0,
 		"conversion_factor": 1.0,
 		"serial_no": args.serial_no,
 		"stock_uom": args.uom or "_Test UOM",

erpnext/accounts/doctype/purchase_invoice_item/purchase_invoice_item.json

@@ -73,6 +73,7 @@
   "manufacturer_part_no",
   "accounting",
   "expense_account",
+  "discount_account",
   "col_break5",
   "is_fixed_asset",
   "asset_location",
@@ -850,6 +851,12 @@
    "options": "Company:company:default_currency",
    "print_hide": 1,
    "read_only": 1
+  },
+  {
+   "fieldname": "discount_account",
+   "fieldtype": "Link",
+   "label": "Discount Account",
+   "options": "Account"
   }
  ],
  "idx": 1,

erpnext/accounts/doctype/sales_invoice/sales_invoice.js

@@ -347,7 +347,7 @@ erpnext.accounts.SalesInvoiceController = class SalesInvoiceController extends e
 
 	items_add(doc, cdt, cdn) {
 		var row = frappe.get_doc(cdt, cdn);
-		this.frm.script_manager.copy_from_first_row("items", row, ["income_account", "cost_center"]);
+		this.frm.script_manager.copy_from_first_row("items", row, ["income_account", "discount_account", "cost_center"]);
 	}
 
 	set_dynamic_labels() {
@@ -510,7 +510,6 @@ cur_frm.set_query("income_account", "items", function(doc) {
 	}
 });
 
-
 // Cost Center in Details Table
 // -----------------------------
 cur_frm.fields_dict["items"].grid.get_field("cost_center").get_query = function(doc) {
@@ -592,6 +591,16 @@ frappe.ui.form.on('Sales Invoice', {
 			};
 		});
 
+		frm.set_query("additional_discount_account", function() {
+			return {
+				filters: {
+					company: frm.doc.company,
+					is_group: 0,
+					report_type: "Profit and Loss",
+				}
+			};
+		});
+
 		frm.custom_make_buttons = {
 			'Delivery Note': 'Delivery',
 			'Sales Invoice': 'Return / Credit Note',
@@ -618,6 +627,17 @@ frappe.ui.form.on('Sales Invoice', {
 			}
 		}
 
+		// discount account
+		frm.fields_dict['items'].grid.get_field('discount_account').get_query = function(doc) {
+			return {
+				filters: {
+					'report_type': 'Profit and Loss',
+					'company': doc.company,
+					"is_group": 0
+				}
+			}
+		}
+
 		frm.fields_dict['items'].grid.get_field('deferred_revenue_account').get_query = function(doc) {
 			return {
 				filters: {

erpnext/accounts/doctype/sales_invoice/sales_invoice.json

@@ -106,6 +106,7 @@
   "section_break_49",
   "apply_discount_on",
   "base_discount_amount",
+  "additional_discount_account",
   "column_break_51",
   "additional_discount_percentage",
   "discount_amount",
@@ -2332,6 +2333,12 @@
    "fieldtype": "Check",
    "label": "Disable Rounded Total"
   },
+  {
+   "fieldname": "additional_discount_account",
+   "fieldtype": "Link",
+   "label": "Additional Discount Account",
+   "options": "Account"
+  },
   {
    "allow_on_submit": 1,
    "fieldname": "dispatch_address_name",