diff --git a/htdocs/bom/bom_card.php b/htdocs/bom/bom_card.php
index 81b5f858c9b..c4146660053 100644
--- a/htdocs/bom/bom_card.php
+++ b/htdocs/bom/bom_card.php
@@ -68,6 +68,7 @@ if (empty($action) && empty($id) && empty($ref)) $action = 'view';
 
 // Load object
 include DOL_DOCUMENT_ROOT.'/core/actions_fetchobject.inc.php'; // Must be include, not include_once.
+$object->calculateCosts();
 
 // Security check - Protection if external user
 //if ($user->socid > 0) accessforbidden();
@@ -523,6 +524,8 @@ if ($object->id > 0 && (empty($action) || ($action != 'edit' && $action != 'crea
 	$keyforbreak = 'duration';
 	include DOL_DOCUMENT_ROOT.'/core/tpl/commonfields_view.tpl.php';
 
+	print '<td>Coût total</td><td>'.price($object->total_cost).'</td>';
+
 	// Other attributes
 	include DOL_DOCUMENT_ROOT.'/core/tpl/extrafields_view.tpl.php';
 
diff --git a/htdocs/bom/class/bom.class.php b/htdocs/bom/class/bom.class.php
index b53e2a7bc88..5e25ef7fb14 100644
--- a/htdocs/bom/class/bom.class.php
+++ b/htdocs/bom/class/bom.class.php
@@ -912,6 +912,7 @@ class BOM extends CommonObject
 	    else
 	    {
 	        $this->lines = $result;
+	        $this->calculateCosts();
 	        return $this->lines;
 	    }
 	}
@@ -991,6 +992,19 @@ class BOM extends CommonObject
 
 		return $error;
 	}
+
+	public function calculateCosts() {
+		include_once DOL_DOCUMENT_ROOT . '/product/class/product.class.php';
+		$this->total_cost = 0;
+		foreach ($this->lines as &$line) {
+			$tmpproduct = new Product($this->db);
+			$tmpproduct->fetch($line->fk_product);
+
+			$line->unit_cost = $tmpproduct->cost_price; // TODO : add option to work with cost_price or pmp
+			$line->total_cost = price2num($line->qty * $line->unit_cost);
+			$this->total_cost += $line->total_cost;
+		}
+	}
 }
 
 
diff --git a/htdocs/bom/tpl/objectline_create.tpl.php b/htdocs/bom/tpl/objectline_create.tpl.php
index 445466a27a1..66bcf0cece5 100644
--- a/htdocs/bom/tpl/objectline_create.tpl.php
+++ b/htdocs/bom/tpl/objectline_create.tpl.php
@@ -133,6 +133,11 @@ print '<td class="bordertop nobottom nowrap linecollost right">';
 print '<input type="text" size="1" name="efficiency" id="efficiency" class="flat right" value="'.(GETPOSTISSET("efficiency")?GETPOST("efficiency", 'alpha'):1).'">';
 print '</td>';
 
+$coldisplay++;
+print '<td class="bordertop nobottom nowrap linecolcost right">';
+print '&nbsp;';
+print '</td>';
+
 $coldisplay += $colspan;
 print '<td class="bordertop nobottom linecoledit center valignmiddle" colspan="'.$colspan.'">';
 print '<input type="submit" class="button" value="'.$langs->trans('Add').'" name="addline" id="addline">';
diff --git a/htdocs/bom/tpl/objectline_title.tpl.php b/htdocs/bom/tpl/objectline_title.tpl.php
index 138a0b9aa58..ce440dbaab6 100644
--- a/htdocs/bom/tpl/objectline_title.tpl.php
+++ b/htdocs/bom/tpl/objectline_title.tpl.php
@@ -60,13 +60,16 @@ if ($conf->global->PRODUCT_USE_UNITS)
 }
 
 // Qty frozen
-print '<td class="linecolqty right">'.$form->textwithpicto($langs->trans('QtyFrozen'), $langs->trans("QuantityConsumedInvariable")).'</td>';
+print '<td class="linecolqtyfrozen right">'.$form->textwithpicto($langs->trans('QtyFrozen'), $langs->trans("QuantityConsumedInvariable")).'</td>';
 
 // Disable stock change
-print '<td class="linecolqty right">'.$form->textwithpicto($langs->trans('DisableStockChange'), $langs->trans('DisableStockChangeHelp')).'</td>';
+print '<td class="linecoldisablestockchange right">'.$form->textwithpicto($langs->trans('DisableStockChange'), $langs->trans('DisableStockChangeHelp')).'</td>';
 
 // Efficiency
-print '<td class="linecollost right">'.$form->textwithpicto($langs->trans('ManufacturingEfficiency'), $langs->trans('ValueOfMeansLoss')).'</td>';
+print '<td class="linecolefficiency right">'.$form->textwithpicto($langs->trans('ManufacturingEfficiency'), $langs->trans('ValueOfMeansLoss')).'</td>';
+
+// Cost
+print '<td class="linecolcost right">'.$langs->trans('CostPrice').'</td>';
 
 print '<td class="linecoledit"></td>';  // No width to allow autodim
 
diff --git a/htdocs/bom/tpl/objectline_view.tpl.php b/htdocs/bom/tpl/objectline_view.tpl.php
index 16aa5382f53..ad2c2d3e4c6 100644
--- a/htdocs/bom/tpl/objectline_view.tpl.php
+++ b/htdocs/bom/tpl/objectline_view.tpl.php
@@ -103,6 +103,11 @@ $coldisplay++;
 echo $line->efficiency;
 print '</td>';
 
+print '<td class="linecolcost nowrap right">';
+$coldisplay++;
+echo price($line->total_cost);
+print '</td>';
+
 if ($this->status == 0 && ($object_rights->write) && $action != 'selectlines' ) {
 	print '<td class="linecoledit center">';
 	$coldisplay++;