diff --git a/project_multi_company/README.rst b/project_multi_company/README.rst
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/project_multi_company/__init__.py b/project_multi_company/__init__.py
new file mode 100644
index 00000000000..0650744f6bc
--- /dev/null
+++ b/project_multi_company/__init__.py
@@ -0,0 +1 @@
+from . import models
diff --git a/project_multi_company/__manifest__.py b/project_multi_company/__manifest__.py
new file mode 100644
index 00000000000..ff507504973
--- /dev/null
+++ b/project_multi_company/__manifest__.py
@@ -0,0 +1,21 @@
+# Copyright (C) 2021 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    "name": "Project - Multi Company",
+    "summary": """
+        This module adds support for multi company on Project Module.""",
+    "version": "12.0.1.0.0",
+    "license": "AGPL-3",
+    "author": "GRAP, Odoo Community Association (OCA)",
+    "maintainers": ["legalsylvain"],
+    "website": "https://github.com/OCA/multi-company",
+    "installable": True,
+    "depends": ["project"],
+    "data": [
+        "security/ir_rule.xml",
+        "views/view_project_tags.xml",
+        "views/view_project_task_type.xml",
+    ],
+}
diff --git a/project_multi_company/i18n/fr.po b/project_multi_company/i18n/fr.po
new file mode 100644
index 00000000000..13d739f7557
--- /dev/null
+++ b/project_multi_company/i18n/fr.po
@@ -0,0 +1,33 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#   * project_multi_company
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2024-09-28 14:23+0000\n"
+"PO-Revision-Date: 2024-09-28 14:23+0000\n"
+"Last-Translator: <>\n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: project_multi_company
+#: model:ir.model.fields,field_description:project_multi_company.field_project_tags__company_id
+#: model:ir.model.fields,field_description:project_multi_company.field_project_task_type__company_id
+msgid "Company"
+msgstr "Société"
+
+#. module: project_multi_company
+#: model:ir.model,name:project_multi_company.model_project_tags
+msgid "Project Tags"
+msgstr "Étiquettes de projet"
+
+#. module: project_multi_company
+#: model:ir.model,name:project_multi_company.model_project_task_type
+msgid "Task Stage"
+msgstr "Étape de tâche"
+
diff --git a/project_multi_company/models/__init__.py b/project_multi_company/models/__init__.py
new file mode 100644
index 00000000000..345a7c5a8e3
--- /dev/null
+++ b/project_multi_company/models/__init__.py
@@ -0,0 +1,2 @@
+from . import project_tags
+from . import project_task_type
diff --git a/project_multi_company/models/project_tags.py b/project_multi_company/models/project_tags.py
new file mode 100644
index 00000000000..ed1f605537c
--- /dev/null
+++ b/project_multi_company/models/project_tags.py
@@ -0,0 +1,19 @@
+# Copyright (C) 2021 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class ProjectTags(models.Model):
+    _inherit = "project.tags"
+
+    company_id = fields.Many2one(
+        "res.company",
+        string="Company",
+        index=True,
+        default=lambda self: self._default_company_id(),
+    )
+
+    def _default_company_id(self):
+        return self.env.user.company_id
diff --git a/project_multi_company/models/project_task_type.py b/project_multi_company/models/project_task_type.py
new file mode 100644
index 00000000000..a28bfaaf302
--- /dev/null
+++ b/project_multi_company/models/project_task_type.py
@@ -0,0 +1,19 @@
+# Copyright (C) 2021 - Today: GRAP (http://www.grap.coop)
+# @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class ProjectTaskType(models.Model):
+    _inherit = "project.task.type"
+
+    company_id = fields.Many2one(
+        "res.company",
+        string="Company",
+        index=True,
+        default=lambda self: self._default_company_id(),
+    )
+
+    def _default_company_id(self):
+        return self.env.user.company_id
diff --git a/project_multi_company/readme/CONTRIBUTORS.rst b/project_multi_company/readme/CONTRIBUTORS.rst
new file mode 100644
index 00000000000..9f76a75bc18
--- /dev/null
+++ b/project_multi_company/readme/CONTRIBUTORS.rst
@@ -0,0 +1 @@
+* Sylvain LE GAL <https://twitter.com/legalsylvain>
diff --git a/project_multi_company/readme/DESCRIPTION.rst b/project_multi_company/readme/DESCRIPTION.rst
new file mode 100644
index 00000000000..17ea55113ec
--- /dev/null
+++ b/project_multi_company/readme/DESCRIPTION.rst
@@ -0,0 +1,4 @@
+This module adds support for multi company on Project module.
+It adds ``company_id`` on the following models :
+- ``project.task.type`` (Stages)
+- ``project.tags`` (Tags)
\ No newline at end of file
diff --git a/project_multi_company/security/ir_rule.xml b/project_multi_company/security/ir_rule.xml
new file mode 100644
index 00000000000..385c6a96bd8
--- /dev/null
+++ b/project_multi_company/security/ir_rule.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<odoo noupdate="1">
+
+    <record id="project_tags_company_rule" model="ir.rule">
+        <field name="name">Project Tags - Multi-Company</field>
+        <field name="model_id" ref="project.model_project_tags"/>
+        <field name="domain_force">['|',('company_id','=',False),('company_id','child_of',[user.company_id.id])]</field>
+    </record>
+
+    <record id="project_task_type_company_rule" model="ir.rule">
+        <field name="name">Project Stages - Multi-Company</field>
+        <field name="model_id" ref="project.model_project_task_type"/>
+        <field name="domain_force">['|',('company_id','=',False),('company_id','child_of',[user.company_id.id])]</field>
+    </record>
+
+</odoo>
diff --git a/project_multi_company/views/view_project_tags.xml b/project_multi_company/views/view_project_tags.xml
new file mode 100644
index 00000000000..2d18940fa22
--- /dev/null
+++ b/project_multi_company/views/view_project_tags.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 - Today: GRAP (http://www.grap.coop)
+  @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+-->
+
+<odoo>
+
+    <record id="view_project_tags_tree" model="ir.ui.view">
+        <field name="model">project.tags</field>
+        <field name="arch" type="xml">
+            <tree>
+                <field name="name" />
+                <field name="company_id" groups="base.group_multi_company"/>
+            </tree>
+        </field>
+    </record>
+
+    <record id="view_project_tags_form" model="ir.ui.view">
+        <field name="model">project.tags</field>
+        <field name="inherit_id" ref="project.project_tags_form_view"/>
+        <field name="arch" type="xml">
+            <field name="name" position="after">
+                <field name="company_id" groups="base.group_multi_company"/>
+            </field>
+        </field>
+    </record>
+
+</odoo>
diff --git a/project_multi_company/views/view_project_task_type.xml b/project_multi_company/views/view_project_task_type.xml
new file mode 100644
index 00000000000..ae31f268a0e
--- /dev/null
+++ b/project_multi_company/views/view_project_task_type.xml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright (C) 2021 - Today: GRAP (http://www.grap.coop)
+  @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
+  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+-->
+
+<odoo>
+
+    <record id="view_project_task_type_tree" model="ir.ui.view">
+        <field name="model">project.task.type</field>
+        <field name="inherit_id" ref="project.task_type_tree"/>
+        <field name="arch" type="xml">
+            <field name="description" position="after">
+                <field name="company_id" groups="base.group_multi_company"/>
+            </field>
+        </field>
+    </record>
+
+    <record id="view_project_task_type_form" model="ir.ui.view">
+        <field name="model">project.task.type</field>
+        <field name="inherit_id" ref="project.task_type_edit"/>
+        <field name="arch" type="xml">
+            <field name="mail_template_id" position="after">
+                <field name="company_id" groups="base.group_multi_company"/>
+            </field>
+        </field>
+    </record>
+
+</odoo>
diff --git a/setup/project_multi_company/odoo/addons/project_multi_company b/setup/project_multi_company/odoo/addons/project_multi_company
new file mode 120000
index 00000000000..577fef3948a
--- /dev/null
+++ b/setup/project_multi_company/odoo/addons/project_multi_company
@@ -0,0 +1 @@
+../../../../project_multi_company
\ No newline at end of file
diff --git a/setup/project_multi_company/setup.py b/setup/project_multi_company/setup.py
new file mode 100644
index 00000000000..28c57bb6403
--- /dev/null
+++ b/setup/project_multi_company/setup.py
@@ -0,0 +1,6 @@
+import setuptools
+
+setuptools.setup(
+    setup_requires=['setuptools-odoo'],
+    odoo_addon=True,
+)