diff --git a/modules/purchase_trade/sale.py b/modules/purchase_trade/sale.py
index a7e477e..c5685e4 100755
--- a/modules/purchase_trade/sale.py
+++ b/modules/purchase_trade/sale.py
@@ -568,7 +568,7 @@ class SaleLine(metaclass=PoolMeta):
         if self.price_components:
             for pc in self.price_components:
                 if pc.price_index:
-                    pricing_text += 'ON ' + pc.price_index.price_desc
+                    pricing_text += 'ON ' + pc.price_index.price_desc + ' ' + (pc.price_index.price_period.description if pc.price_index.price_period else '')
         return pricing_text
     
     @fields.depends('product')