diff --git a/l10n_es_aeat_sii_oca/models/account_move.py b/l10n_es_aeat_sii_oca/models/account_move.py
index 6d80a5aa5ea..debfc306c96 100644
--- a/l10n_es_aeat_sii_oca/models/account_move.py
+++ b/l10n_es_aeat_sii_oca/models/account_move.py
@@ -500,6 +500,7 @@ def _get_sii_invoice_dict_in(self, cancel=False):
         """Build dict with data to send to AEAT WS for invoice types:
         in_invoice and in_refund.
 
+        :param cancel: It indicates if the dictionary if for sending a
         :param cancel: It indicates if the dictionary if for sending a
           cancellation of the invoice.
         :return: invoices (dict) : Dict XML with data for this invoice.
@@ -508,7 +509,7 @@ def _get_sii_invoice_dict_in(self, cancel=False):
         invoice_date = self._change_date_format(self.invoice_date)
         reg_date = self._change_date_format(self._get_account_registration_date())
         ejercicio = fields.Date.to_date(self.date).year
-        periodo = "%02d" % fields.Date.to_date(self.date).month
+        periodo = self._get_document_period()
         partner = self._sii_get_partner()
         desglose_factura, tax_amount, not_in_amount_total = self._get_sii_in_taxes()
         inv_dict = {
diff --git a/l10n_es_aeat_sii_oca/models/res_company.py b/l10n_es_aeat_sii_oca/models/res_company.py
index 606ba1e711b..49f6340069e 100644
--- a/l10n_es_aeat_sii_oca/models/res_company.py
+++ b/l10n_es_aeat_sii_oca/models/res_company.py
@@ -69,6 +69,13 @@ class ResCompany(models.Model):
     )
     sent_time = fields.Float()
     delay_time = fields.Float()
+    sii_period = fields.Selection(
+        selection=[
+            ("monthly", "Monthly"),
+            ("quarterly", "Quarterly"),
+        ],
+        default="monthly",
+    )
 
     def _get_sii_eta(self):
         if self.send_mode == "fixed":
diff --git a/l10n_es_aeat_sii_oca/models/sii_mixin.py b/l10n_es_aeat_sii_oca/models/sii_mixin.py
index 6e3540066cc..809c1ec6aff 100644
--- a/l10n_es_aeat_sii_oca/models/sii_mixin.py
+++ b/l10n_es_aeat_sii_oca/models/sii_mixin.py
@@ -426,7 +426,12 @@ def _get_document_fiscal_year(self):
         return fields.Date.to_date(self._get_document_fiscal_date()).year
 
     def _get_document_period(self):
-        return "%02d" % fields.Date.to_date(self._get_document_fiscal_date()).month
+        month = fields.Date.to_date(self._get_document_fiscal_date()).month
+        if self.company_id.sii_period == "monthly":
+            period = "%02d" % month
+        else:
+            period = str(int(((month - 1) / 3) + 1)) + "T"
+        return period
 
     def _get_document_serial_number(self):
         raise NotImplementedError()
diff --git a/l10n_es_aeat_sii_oca/views/res_company_view.xml b/l10n_es_aeat_sii_oca/views/res_company_view.xml
index 52862bd1e97..49e7d58eaf2 100644
--- a/l10n_es_aeat_sii_oca/views/res_company_view.xml
+++ b/l10n_es_aeat_sii_oca/views/res_company_view.xml
@@ -17,6 +17,7 @@
                         <group name="sii_config">
                             <field name="sii_test" />
                             <field name="sii_method" />
+                            <field name="sii_period" />
                         </group>
                         <group name="sii_description" string="Description config">
                             <field name="sii_description_method" />