diff --git a/modules/purchase_trade/__init__.py b/modules/purchase_trade/__init__.py
index 30a7040..f7c201e 100755
--- a/modules/purchase_trade/__init__.py
+++ b/modules/purchase_trade/__init__.py
@@ -173,6 +173,9 @@ def register():
         purchase.AssayLine,
         purchase.AssayElement,
         purchase.AssayUnit,
+        purchase.PayableRule,
+        purchase.PenaltyRule,
+        purchase.ConcentrateTerm,
         backtoback.Backtoback,
         dimension.AnalyticDimension,
         dimension.AnalyticDimensionValue,
diff --git a/modules/purchase_trade/purchase.py b/modules/purchase_trade/purchase.py
index c01f26c..cca9aef 100755
--- a/modules/purchase_trade/purchase.py
+++ b/modules/purchase_trade/purchase.py
@@ -760,6 +760,67 @@ class AssayElement(ModelSQL, ModelView):
         ('impurity', 'Impurity'),
     ], "Type")
 
+class PayableRule(ModelSQL, ModelView):
+    "Payable Rule"
+    __name__ = 'payable.rule'
+
+    element = fields.Many2One('assay.element', "Element")
+
+    payable_percent = fields.Numeric("Payable %")
+
+    deduction_value = fields.Numeric("Deduction Value")
+    deduction_unit = fields.Many2One('assay.unit',"Unit")
+
+class PenaltyRule(ModelSQL, ModelView):
+    "Penalty Rule"
+    __name__ = 'penalty.rule'
+
+    element = fields.Many2One('assay.element', "Element")
+
+    threshold = fields.Numeric("Treshold")
+    threshold_unit = fields.Many2One('assay.unit',"Unit")
+
+    step = fields.Numeric("Step")
+    penalty_value = fields.Numeric("Penalty Value")
+    currency = fields.Many2One('currency.currency',"Curr")
+    unit = fields.Many2One('product.uom',"Unit")
+
+class ConcentrateTerm(ModelSQL, ModelView):
+    "Concentrate Term"
+    __name__ = 'concentrate.term'
+
+    line = fields.Many2One(
+        'purchase.line', "Line",
+        ondelete='CASCADE'
+    )
+
+    element = fields.Many2One('assay.element',"Element")
+
+    component = fields.Many2One(
+        'pricing.component',
+        "Price Component"
+    )
+
+    manual_price = fields.Numeric(
+        "Manual Price",
+        digits=(16, 6)
+    )
+
+    currency = fields.Many2One('currency.currency',"Curr")
+    unit = fields.Many2One('product.uom',"Unit")
+
+    payable_rule = fields.Many2One(
+        'payable.rule',"Payable Rule"
+    )
+
+    penalty_rules = fields.Many2One(
+        'penalty.rule',
+        "Penalties"
+    )
+
+    valid_from = fields.Date("Valid From")
+    valid_to = fields.Date("Valid To")
+    
 class QualityAnalysis(ModelSQL,ModelView):
     "Quality Analysis"
     __name__ = 'quality.analysis'
@@ -922,6 +983,7 @@ class Line(metaclass=PoolMeta):
 
     quality_analysis = fields.One2Many('quality.analysis','line',"Quality analysis")
     assays = fields.One2Many('assay.assay','line',"Assays")
+    terms = fields.One2Many('concentrate.term','line',"Terms")
 
     @classmethod
     def default_finished(cls):
diff --git a/modules/purchase_trade/purchase.xml b/modules/purchase_trade/purchase.xml
index 9ff5df5..2576cbd 100755
--- a/modules/purchase_trade/purchase.xml
+++ b/modules/purchase_trade/purchase.xml
@@ -194,6 +194,17 @@ this repository contains the full copyright notices and license terms. -->
             <field name="name">assay_element_form</field>
         </record>
 
+        <record model="ir.ui.view" id="concentrate_view_tree">
+            <field name="model">concentrate.term</field>
+            <field name="type">tree</field>
+            <field name="name">concentrate_tree</field>
+        </record>
+        <record model="ir.ui.view" id="concentrate_view_form">
+            <field name="model">concentrate.term</field>
+            <field name="type">form</field>
+            <field name="name">concentrate_form</field>
+        </record>
+
         <menuitem
             name="Pnl Report"
 	        parent="purchase_trade.menu_global_reporting"
diff --git a/modules/purchase_trade/view/concentrate_form.xml b/modules/purchase_trade/view/concentrate_form.xml
new file mode 100644
index 0000000..b3268be
--- /dev/null
+++ b/modules/purchase_trade/view/concentrate_form.xml
@@ -0,0 +1,22 @@
+<form col="4">
+    <label name="element"/>
+    <field name="element"/>
+    <label name="component"/>
+    <field name="component"/>
+    <label name="payable_rule"/>
+    <field name="payable_rule"/>
+    <label name="penalty_rules"/>
+    <field name="penalty_rules"/>
+    <newline/>
+    <label name="manual_price"/>
+    <field name="manual_price"/>
+    <label name="currency"/>
+    <field name="currency"/>
+    <label name="unit"/>
+    <field name="unit"/>
+    <newline/>
+    <label name="valid_from"/>
+    <field name="valid_from"/>
+    <label name="valid_to"/>
+    <field name="valid_to"/>
+</form>
\ No newline at end of file
diff --git a/modules/purchase_trade/view/concentrate_tree.xml b/modules/purchase_trade/view/concentrate_tree.xml
new file mode 100644
index 0000000..be11b80
--- /dev/null
+++ b/modules/purchase_trade/view/concentrate_tree.xml
@@ -0,0 +1,6 @@
+<tree editable="1">
+    <field name="element"/>
+    <field name="component"/>
+    <field name="payable_rule"/>
+    <field name="penalty_rules"/>
+</tree>
\ No newline at end of file
diff --git a/modules/purchase_trade/view/purchase_line_form.xml b/modules/purchase_trade/view/purchase_line_form.xml
index 754d028..2e0ab9f 100755
--- a/modules/purchase_trade/view/purchase_line_form.xml
+++ b/modules/purchase_trade/view/purchase_line_form.xml
@@ -55,9 +55,15 @@ this repository contains the full copyright notices and license terms. -->
         <field name="certif"/>
     </xpath>
     <xpath expr="/form/notebook/page[@id='taxes']" position="before">
-        <page string="Assays" col="4" id="as">
-            <field name="assays" mode="tree,form" view_ids="purchase_trade.assay_view_tree,purchase_trade.assay_view_form"/>
-        </page>
+        <page string="Concentrate" col="4" id="co">
+            <notebook colspan="4">
+                <page string="Assays" col="4" id="as">
+                    <field name="assays" mode="tree,form" view_ids="purchase_trade.assay_view_tree,purchase_trade.assay_view_form"/>
+                </page>
+                <page string="Term" col="4" id="te">
+                    <field name="terms" mode="tree,form" view_ids="purchase_trade.concentrate_view_tree,purchase_trade.concentrate_view_form"/>
+                </page>
+            </notebook>
         <page string="Lots" col="4" id="lots">
             <field name="lots" mode="tree,form" view_ids="lot.lot_view_tree_sequence,lot.lot_view_form"/>
         </page>