diff --git a/beesdoo_shift/models/cooperative_status.py b/beesdoo_shift/models/cooperative_status.py
index c5045e5..05dd4eb 100644
--- a/beesdoo_shift/models/cooperative_status.py
+++ b/beesdoo_shift/models/cooperative_status.py
@@ -7,6 +7,7 @@ import logging
 from openerp.osv.fields import related
 
 _logger = logging.getLogger(__name__)
+PERIOD = 28  # TODO: use system parameter
 
 def add_days_delta(date_from, days_delta):
     if not date_from:
@@ -76,6 +77,7 @@ class CooperativeStatus(models.Model):
     irregular_start_date = fields.Date()  #TODO migration script
     irregular_absence_date = fields.Date()
     irregular_absence_counter = fields.Integer() #TODO unsubscribe when reach -2
+    future_alert_date = fields.Date(compute='_compute_future_alert_date')
 
     temporary_exempt_reason_id = fields.Many2one('cooperative.exempt.reason', 'Exempt Reason')
     temporary_exempt_start_date = fields.Date()
@@ -110,6 +112,18 @@ class CooperativeStatus(models.Model):
                 rec.status = 'ok'
                 rec.can_shop = True
 
+    @api.depends('today', 'irregular_start_date', 'sr')
+    def _compute_future_alert_date(self):
+        """Compute date before which the worker is up to date"""
+        for rec in self:
+            future_alert_date = False
+            if not rec.alert_start_time and rec.irregular_start_date:
+                today_date = fields.Date.from_string(rec.today)
+                delta = (today_date - fields.Date.from_string(rec.irregular_start_date)).days
+                future_alert_date = today_date + timedelta(days=(rec.sr + 1) * PERIOD - delta % PERIOD)
+                future_alert_date = future_alert_date.strftime('%Y-%m-%d')
+            rec.future_alert_date = future_alert_date
+
     def _set_regular_status(self, grace_delay, alert_delay):
         self.ensure_one()
         ok = self.sr >= 0 and self.sc >= 0
@@ -266,7 +280,7 @@ class CooperativeStatus(models.Model):
             if status.status == 'exempted':
                 continue
             delta = (today_date - fields.Date.from_string(status.irregular_start_date)).days
-            if delta and delta % 28 == 0 and status not in journal.line_ids: #TODO use system parameter for 28
+            if delta and delta % PERIOD == 0 and status not in journal.line_ids:
                 if status.sr > 0:
                     status.sr -= 1
                 else:
diff --git a/beesdoo_shift/views/cooperative_status.xml b/beesdoo_shift/views/cooperative_status.xml
index 1327593..dbf8dc3 100644
--- a/beesdoo_shift/views/cooperative_status.xml
+++ b/beesdoo_shift/views/cooperative_status.xml
@@ -70,7 +70,7 @@
                         <field name="working_mode" />
                         <field name="irregular_start_date" attrs="{'invisible':[('working_mode', '!=', 'irregular')]}" />
                         <field name="irregular_absence_date" attrs="{'invisible':[('working_mode', '!=', 'irregular')]}" />
-                        
+
                         <field name="exempt_reason_id" attrs="{'invisible':[('working_mode', '!=', 'exempt')]}"/>
                     </group>
                     <group string="Counter and Status">
@@ -84,6 +84,7 @@
                         <field name="can_shop" />
                     </group>
                     <group string="Timing information">
+                        <field name="future_alert_date" readonly="1" />
                         <field name="time_extension" />
                         <field name="holiday_start_time" />
                         <field name="holiday_end_time" />
@@ -132,7 +133,7 @@
             </tree>
         </field>
     </record>
-    
+
     <record model="ir.ui.view" id="journal_form_view">
         <field name="name">Journal Form View</field>
         <field name="model">beesdoo.shift.journal</field>
@@ -179,13 +180,13 @@
         sequence="1" />
     <menuitem name="Worker" id="menu_worker" parent="menu_worker_top"
         action="action_worker" />
-        
+
     <record model="ir.actions.act_window" id="action_journal">
         <field name="name">Counter Journal</field>
         <field name="res_model">beesdoo.shift.journal</field>
         <field name="view_mode">tree,form</field>
     </record>
-        
+
     <menuitem name="Counter Update Journal" id="menu_journal" parent="menu_status_top"
         action="action_journal" groups="beesdoo_shift.group_cooperative_admin" />
 </odoo>