diff --git a/addons/l10n_es_edi_facturae/models/account_move.py b/addons/l10n_es_edi_facturae/models/account_move.py
index 82cc8cea038..2fc9c206bfb 100644
--- a/addons/l10n_es_edi_facturae/models/account_move.py
+++ b/addons/l10n_es_edi_facturae/models/account_move.py
@@ -192,10 +192,18 @@ class AccountMove(models.Model):
                 continue
             invoice_line_values = {}
 
-            price_before_discount = line.currency_id.round(line.price_subtotal / (1 - line.discount / 100.0))
+            tax_base_before_discount = self.env['account.tax']._convert_to_tax_base_line_dict(
+                base_line=line,
+                currency=line.currency_id,
+                taxes=line.tax_ids,
+                price_unit=line.price_unit,
+                quantity=line.quantity,
+            )
+            tax_before_discount = self.env['account.tax']._compute_taxes([tax_base_before_discount])
+            price_before_discount = sum(to_update['price_subtotal'] for _dummy, to_update in tax_before_discount['base_lines_to_update'])
             discount = max(0., (price_before_discount - line.price_subtotal))
             surcharge = abs(min(0., (price_before_discount - line.price_subtotal)))
-            totals['total_gross_amount'] += line.price_subtotal
+            totals['total_gross_amount'] += price_before_discount
             totals['total_general_discounts'] += discount
             totals['total_general_surcharges'] += surcharge
             base_line = self.env['account.tax']._convert_to_tax_base_line_dict(
diff --git a/addons/l10n_es_edi_facturae/tests/test_edi_xml.py b/addons/l10n_es_edi_facturae/tests/test_edi_xml.py
index f79f7bff684..3f8dc943f81 100644
--- a/addons/l10n_es_edi_facturae/tests/test_edi_xml.py
+++ b/addons/l10n_es_edi_facturae/tests/test_edi_xml.py
@@ -234,3 +234,20 @@ class TestEdiFacturaeXmls(AccountEdiTestCommon):
             with file_open("l10n_es_edi_facturae/tests/data/expected_refund_document.xml", "rt") as f:
                 expected_xml = lxml.etree.fromstring(f.read().encode())
             self.assertXmlTreeEqual(lxml.etree.fromstring(generated_file), expected_xml)
+
+    def test_discount_100_percent(self):
+        """ Create an invoice with a 100% discount """
+        with freeze_time(self.frozen_today), \
+                patch(f"{self.certificate_module}.fields.datetime.now", lambda x=None: self.frozen_today), \
+                patch(f"{self.certificate_module}.sha1", lambda x: sha1()):
+            invoice = self.create_invoice(
+                partner_id=self.partner_a.id,
+                move_type='out_invoice',
+                invoice_line_ids=[{'product_id': self.product_a.id, 'price_unit': 1000.0, 'discount': 100.0, 'quantity': 2}],
+            )
+            invoice.action_post()
+            wizard = self.create_send_and_print(invoice)
+            result = wizard.action_send_and_print()
+
+            self.assertEqual(result['type'], 'ir.actions.act_url')
+            self.assertEqual(invoice.invoice_line_ids[0].price_subtotal, 0.0)