diff --git a/addons/sale/res_config.py b/addons/sale/res_config.py
index 5027f89cf86..ce123f8dcfc 100644
--- a/addons/sale/res_config.py
+++ b/addons/sale/res_config.py
@@ -72,8 +72,8 @@ class sale_configuration(osv.TransientModel):
         'group_show_price_subtotal': fields.boolean("Show subtotal", implied_group='sale.group_show_price_subtotal', group='base.group_portal,base.group_user,base.group_public'),
         'group_show_price_total': fields.boolean("Show total", implied_group='sale.group_show_price_total', group='base.group_portal,base.group_user,base.group_public'),
         'sale_show_tax': fields.selection([
-            ('total', 'Show line subtotals with taxes included (B2C)'),
-            ('subtotal', 'Show line subtotals without taxes (except if unit price includes taxes) (B2B)')], "Tax Display",
+            ('subtotal', 'Show line subtotals without taxes (B2B)'),
+            ('total', 'Show line subtotals with taxes included (B2C)')], "Tax Display",
             required=True),
         'default_invoice_policy': fields.selection([
             ('order', 'Invoice ordered quantities'),
diff --git a/addons/sale/security/sale_security.xml b/addons/sale/security/sale_security.xml
index 2bb41b4fb5b..e3126ce43f1 100644
--- a/addons/sale/security/sale_security.xml
+++ b/addons/sale/security/sale_security.xml
@@ -25,6 +25,18 @@
         <field name="comment">Show line subtotals with taxes included (B2C)</field>
     </record>
 
+    <record model="res.groups" id="base.group_public">
+        <field name="implied_ids" eval="[(4, ref('sale.group_show_price_subtotal'))]"/>
+    </record>
+
+    <record model="res.groups" id="base.group_portal">
+        <field name="implied_ids" eval="[(4, ref('sale.group_show_price_subtotal'))]"/>
+    </record>
+
+    <record model="res.groups" id="base.group_user">
+        <field name="implied_ids" eval="[(4, ref('sale.group_show_price_subtotal'))]"/>
+    </record>
+
     <record id="group_mrp_properties" model="res.groups">
         <field name="name">Properties on lines</field>
         <field name="category_id" ref="base.module_category_hidden"/>