diff --git a/kfet/migrations/0048_articlecategory_has_addcost.py b/kfet/migrations/0048_articlecategory_has_addcost.py
new file mode 100644
index 00000000..e79ad7e6
--- /dev/null
+++ b/kfet/migrations/0048_articlecategory_has_addcost.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('kfet', '0047_auto_20170104_1528'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='articlecategory',
+            name='has_addcost',
+            field=models.BooleanField(default=True),
+        ),
+    ]
diff --git a/kfet/models.py b/kfet/models.py
index c6853577..129ea7f3 100644
--- a/kfet/models.py
+++ b/kfet/models.py
@@ -327,13 +327,16 @@ class CheckoutStatement(models.Model):
                     balance=F('balance') - last_statement.balance_new + self.balance_new)
             super(CheckoutStatement, self).save(*args, **kwargs)
 
+
 @python_2_unicode_compatible
 class ArticleCategory(models.Model):
-    name = models.CharField(max_length = 45)
+    name = models.CharField(max_length=45)
+    has_addcost = models.BooleanField(default=True)
 
     def __str__(self):
         return self.name
 
+
 @python_2_unicode_compatible
 class Article(models.Model):
     name     = models.CharField(max_length = 45)
diff --git a/kfet/views.py b/kfet/views.py
index 19574f11..2164de47 100644
--- a/kfet/views.py
+++ b/kfet/views.py
@@ -990,7 +990,7 @@ def kpsul_perform_operations(request):
     for operation in operations:
         if operation.type == Operation.PURCHASE:
             operation.amount = - operation.article.price * operation.article_nb
-            if is_addcost:
+            if is_addcost & operation.article.category.has_addcost:
                 operation.addcost_for    = addcost_for
                 operation.addcost_amount = addcost_amount * operation.article_nb
                 operation.amount        -= operation.addcost_amount
@@ -1001,7 +1001,7 @@ def kpsul_perform_operations(request):
             else:
                 operation.is_checkout = False
             if operationgroup.on_acc.is_cof:
-                if is_addcost:
+                if is_addcost & operation.article.category.has_addcost:
                     operation.addcost_amount = operation.addcost_amount / cof_grant_divisor
                 operation.amount = operation.amount / cof_grant_divisor
             to_articles_stocks[operation.article] -= operation.article_nb