diff --git a/project_working_time_task_portal/models/billable_time.py b/project_working_time_task_portal/models/billable_time.py
index 5bec0e5..f120514 100644
--- a/project_working_time_task_portal/models/billable_time.py
+++ b/project_working_time_task_portal/models/billable_time.py
@@ -59,7 +59,7 @@ class Task(models.Model):
         help="Non billable time spent on this task and its sub-tasks (and their own sub-tasks).",
     )
 
-    @api.depends('timesheet_ids.unit_amount')
+    @api.depends('timesheet_ids.unit_amount', 'timesheet_ids.exclude_from_sale_order')
     def _compute_billable_effective_hours(self):
         if not any(self._ids):
             for task in self: