diff --git a/fields/field.constant.php b/fields/field.constant.php
index 368b4a4..7a3f1bf 100644
--- a/fields/field.constant.php
+++ b/fields/field.constant.php
@@ -116,6 +116,9 @@
 $GO_FIELDS['is_helpdesk_visible']['name']       = __("Associable to a ticket");
 $GO_FIELDS['is_helpdesk_visible']['input_type'] = 'bool';
 
+$GO_FIELDS['ticket_tco']['name']       = __("TCO");
+$GO_FIELDS['ticket_tco']['input_type'] = 'decimal';
+
 $GO_FIELDS['locations_id']['name']       = __("Item location");
 $GO_FIELDS['locations_id']['input_type'] = 'dropdown';
 
diff --git a/inc/object.class.php b/inc/object.class.php
index 5dbf3b6..37ee3c9 100644
--- a/inc/object.class.php
+++ b/inc/object.class.php
@@ -623,7 +623,7 @@ public function showForm($id, $options = [], $previsualisation = false)
     public static function getFieldsToHide()
     {
         return ['id', 'is_recursive', 'is_template', 'template_name', 'is_deleted',
-            'entities_id', 'notepad', 'date_mod', 'date_creation'
+            'entities_id', 'notepad', 'date_mod', 'date_creation', 'ticket_tco'
         ];
     }
 
diff --git a/inc/type.class.php b/inc/type.class.php
index 3440f39..bbcbbf8 100644
--- a/inc/type.class.php
+++ b/inc/type.class.php
@@ -1101,6 +1101,8 @@ public function checkNecessaryFieldsUpdate()
         if ($this->canUseTickets()) {
            //TODO rename is_helpdesk_visible into is_helpdeskvisible
             PluginGenericobjectField::addNewField($table, 'is_helpdesk_visible', 'comment');
+            PluginGenericobjectField::addNewField($table, 'ticket_tco');
+
         } else {
             PluginGenericobjectField::deleteField($table, 'is_helpdesk_visible');
         }
diff --git a/setup.php b/setup.php
index ef00d84..33e3d2a 100644
--- a/setup.php
+++ b/setup.php
@@ -117,12 +117,12 @@ function plugin_init_genericobject()
     global $PLUGIN_HOOKS, $GO_BLACKLIST_FIELDS,
           $GENERICOBJECT_PDF_TYPES, $GO_LINKED_TYPES, $GO_READONLY_FIELDS, $CFG_GLPI;
 
-    $GO_READONLY_FIELDS  =  ["is_helpdesk_visible", "comment"];
+    $GO_READONLY_FIELDS  =  ["is_helpdesk_visible", "comment", "ticket_tco"];
 
     $GO_BLACKLIST_FIELDS =  ["itemtype", "table", "is_deleted", "id", "entities_id",
         "is_recursive", "is_template", "notepad", "template_name",
         "date_mod", "name", "is_helpdesk_visible", "comment",
-        "date_creation"
+        "date_creation", "ticket_tco"
     ];
 
     $GO_LINKED_TYPES     =  ['Computer', 'Phone', 'Peripheral', 'Software', 'Monitor',