diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index 0c530a1..e1ad2ab 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -28,7 +28,6 @@
 from erpnext.accounts.utils import cancel_exchange_gain_loss_journal, get_account_currency
 from erpnext.assets.doctype.asset.depreciation import (
 	depreciate_asset,
-	get_disposal_account_and_cost_center,
 	get_gl_entries_on_asset_disposal,
 	get_gl_entries_on_asset_regain,
 	reset_depreciation_schedule,
@@ -1118,17 +1117,8 @@
 		return warehouse
 
 	def set_income_account_for_fixed_assets(self):
-		disposal_account = depreciation_cost_center = None
-		for d in self.get("items"):
-			if d.is_fixed_asset:
-				if not disposal_account:
-					disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(
-						self.company
-					)
-
-				d.income_account = disposal_account
-				if not d.cost_center:
-					d.cost_center = depreciation_cost_center
+		for item in self.items:
+			item.set_income_account_for_fixed_asset(self.company)
 
 	def check_prev_docstatus(self):
 		for d in self.get("items"):
diff --git a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
index dc40bba..cf18529 100644
--- a/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
+++ b/erpnext/accounts/doctype/sales_invoice_item/sales_invoice_item.py
@@ -6,6 +6,8 @@
 from frappe import _
 from frappe.model.document import Document
 
+from erpnext.assets.doctype.asset.depreciation import get_disposal_account_and_cost_center
+
 
 class SalesInvoiceItem(Document):
 	# begin: auto-generated types
@@ -111,3 +113,14 @@
 				)
 				or 0
 			)
+
+	def set_income_account_for_fixed_asset(self, company: str):
+		"""Set income account for fixed asset item based on company's disposal account and cost center."""
+		if not self.is_fixed_asset:
+			return
+
+		disposal_account, depreciation_cost_center = get_disposal_account_and_cost_center(company)
+
+		self.income_account = disposal_account
+		if not self.cost_center:
+			self.cost_center = depreciation_cost_center