diff --git a/htdocs/admin/workflow.php b/htdocs/admin/workflow.php
index b46f7b39cc351..e948bc1be798d 100644
--- a/htdocs/admin/workflow.php
+++ b/htdocs/admin/workflow.php
@@ -81,6 +81,8 @@
 	'WORKFLOW_ORDER_CLASSIFY_BILLED_PROPAL'=>array('enabled'=>'! empty($conf->propal->enabled) && ! empty($conf->commande->enabled)', 'picto'=>'order','warning'=>'WarningCloseAlways'),
 	'WORKFLOW_ORDER_AUTOCREATE_INVOICE'=>array('enabled'=>'! empty($conf->commande->enabled) && ! empty($conf->facture->enabled)', 'picto'=>'bill'),
 	'WORKFLOW_INVOICE_CLASSIFY_BILLED_ORDER'=>array('enabled'=>'! empty($conf->facture->enabled) && ! empty($conf->commande->enabled)', 'picto'=>'bill','warning'=>'WarningCloseAlways'),
+	'WORKFLOW_INVOICE_AMOUNT_CLASSIFY_BILLED_ORDER'=>array('enabled'=>'! empty($conf->facture->enabled) && ! empty($conf->commande->enabled)', 'picto'=>'bill','warning'=>'WarningCloseAlways'),
+
 );
 
 if (! empty($conf->modules_parts['workflow']) && is_array($conf->modules_parts['workflow']))
diff --git a/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php b/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
index c40654efc54d9..73a348302f1bb 100644
--- a/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
+++ b/htdocs/core/triggers/interface_20_modWorkflow_WorkflowManager.class.php
@@ -166,6 +166,25 @@ function run_trigger($action,$object,$user,$langs,$conf)
         		return $ret;
         	}
         }
+        
+        // classify billed order
+        if ($action == 'BILL_VALIDATE')
+        {
+        	dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
+
+        	if (! empty($conf->commande->enabled) && ! empty($conf->global->WORKFLOW_INVOICE_AMOUNT_CLASSIFY_BILLED_ORDER))
+        	{
+        		$object->fetchObjectLinked('','commande',$object->id,$object->element);
+        		if (! empty($object->linkedObjects))
+        		{
+        			foreach($object->linkedObjects['commande'] as $element)
+        			{
+        				$ret=$element->classifyBilled();
+        			}
+        		}
+        		return $ret;
+        	}
+        }
 
         return 0;
     }
diff --git a/htdocs/langs/en_US/workflow.lang b/htdocs/langs/en_US/workflow.lang
index c3e56ba9785a3..390692f264326 100644
--- a/htdocs/langs/en_US/workflow.lang
+++ b/htdocs/langs/en_US/workflow.lang
@@ -8,4 +8,5 @@ descWORKFLOW_PROPAL_AUTOCREATE_INVOICE=Create a customer invoice automatically a
 descWORKFLOW_CONTRACT_AUTOCREATE_INVOICE=Create a customer invoice automatically after a contract is validated
 descWORKFLOW_ORDER_AUTOCREATE_INVOICE=Create a customer invoice automatically after a customer order is closed
 descWORKFLOW_ORDER_CLASSIFY_BILLED_PROPAL=Classify linked source proposal to billed when customer order is set to paid
-descWORKFLOW_INVOICE_CLASSIFY_BILLED_ORDER=Classify linked source customer order to billed when customer invoice is set to paid
\ No newline at end of file
+descWORKFLOW_INVOICE_CLASSIFY_BILLED_ORDER=Classify linked source customer order to billed when customer invoice is set to paid
+descWORKFLOW_INVOICE_AMOUNT_CLASSIFY_BILLED_ORDER=Classify the customer's order as invoiced when the bill(s) are higher than the order 
diff --git a/htdocs/langs/fr_FR/workflow.lang b/htdocs/langs/fr_FR/workflow.lang
index 238ff540ef46b..37b4aff492e4b 100644
--- a/htdocs/langs/fr_FR/workflow.lang
+++ b/htdocs/langs/fr_FR/workflow.lang
@@ -9,3 +9,4 @@ descWORKFLOW_CONTRACT_AUTOCREATE_INVOICE=Créer une facture client automatiqueme
 descWORKFLOW_ORDER_AUTOCREATE_INVOICE=Créer une facture client automatiquement à la clôture d'une commande client
 descWORKFLOW_ORDER_CLASSIFY_BILLED_PROPAL=Classer facturée la proposition commerciale source quand la commande client dérivée est classée payée
 descWORKFLOW_INVOICE_CLASSIFY_BILLED_ORDER=Classer facturée la ou les commandes clients source quand la facture client dérivée est classée payée
+descWORKFLOW_INVOICE_AMOUNT_CLASSIFY_BILLED_ORDER=Classer facturée la commande client source lorsque la facture ou les factures sont supérieures à la commande