diff --git a/htdocs/install/mysql/migration/3.5.0-3.6.0.sql b/htdocs/install/mysql/migration/3.5.0-3.6.0.sql
index 0fb148e0f40032116a12c92e4ccea51e4db16611..fef128888d2e208d619ade0cad30a3f8e33b372d 100644
--- a/htdocs/install/mysql/migration/3.5.0-3.6.0.sql
+++ b/htdocs/install/mysql/migration/3.5.0-3.6.0.sql
@@ -1064,4 +1064,8 @@ CREATE TABLE llx_payment_salary (
 
 --New 1074 : Stock mouvement link to origin
 ALTER TABLE llx_stock_mouvement ADD fk_origin INT NOT NULL ;
-ALTER TABLE llx_stock_mouvement ADD origintype VARCHAR( 32 ) NOT NULL ;
\ No newline at end of file
+ALTER TABLE llx_stock_mouvement ADD origintype VARCHAR( 32 ) NOT NULL ;
+
+--NEw 1300 : Add THM on user
+ALTER TABLE llx_user ADD thm FLOAT NOT NULL ;
+ALTER TABLE llx_projet_task_time ADD thm FLOAT NOT NULL ;
\ No newline at end of file
diff --git a/htdocs/projet/class/task.class.php b/htdocs/projet/class/task.class.php
index e60aaa9a38a73e07d845c652244f9cb668333119..214c64b94f9bdddf08d083b5e7ccfef31d746dae 100644
--- a/htdocs/projet/class/task.class.php
+++ b/htdocs/projet/class/task.class.php
@@ -767,8 +767,8 @@ class Task extends CommonObject
         dol_syslog(get_class($this)."::addTimeSpent sql=".$sql, LOG_DEBUG);
         if ($this->db->query($sql) )
         {
-            $task_id = $this->db->last_insert_id(MAIN_DB_PREFIX."projet_task_time");
-            $ret = $task_id;
+            $tasktime_id = $this->db->last_insert_id(MAIN_DB_PREFIX."projet_task_time");
+            $ret = $tasktme_id;
 
             if (! $notrigger)
             {
@@ -793,6 +793,21 @@ class Task extends CommonObject
             $sql.= " SET duration_effective = duration_effective + '".price2num($this->timespent_duration)."'";
             $sql.= " WHERE rowid = ".$this->id;
 
+            dol_syslog(get_class($this)."::addTimeSpent sql=".$sql, LOG_DEBUG);
+            if (! $this->db->query($sql) )
+            {
+                $this->error=$this->db->lasterror();
+                dol_syslog(get_class($this)."::addTimeSpent error -2 ".$this->error, LOG_ERR);
+                $ret = -2;
+            }
+        }
+		
+		if ($ret >= 0)
+        {
+            $sql = "UPDATE ".MAIN_DB_PREFIX."projet_task_time";
+            $sql.= " SET thm = (SELECT thm FROM ".MAIN_DB_PREFIX."user WHERE rowid = ".$this->timespent_fk_user.")";
+            $sql.= " WHERE rowid = ".$tasktime_id;
+
             dol_syslog(get_class($this)."::addTimeSpent sql=".$sql, LOG_DEBUG);
             if (! $this->db->query($sql) )
             {
diff --git a/htdocs/user/class/user.class.php b/htdocs/user/class/user.class.php
index 09a458ff09911b10084210d7dd8f6ead773d0531..965088d73580ff7e6dd6126c41ff89a6c3ee8d24 100644
--- a/htdocs/user/class/user.class.php
+++ b/htdocs/user/class/user.class.php
@@ -100,6 +100,7 @@ class User extends CommonObject
 	var $parentof;					// To store an array of all parents for all ids.
 
 	var $accountancy_code;				// Accountancy code in prevision of the complete accountancy module
+	var $thm;							// Average cost of employee
 
 
 	/**
@@ -154,6 +155,7 @@ class User extends CommonObject
 		$sql.= " u.photo as photo,";
 		$sql.= " u.openid as openid,";
 		$sql.= " u.accountancy_code,";
+		$sql.= " u.thm,";
 		$sql.= " u.ref_int, u.ref_ext";
 		$sql.= " FROM ".MAIN_DB_PREFIX."user as u";
 
@@ -216,6 +218,7 @@ class User extends CommonObject
 				$this->lang			= $obj->lang;
 				$this->entity		= $obj->entity;
 				$this->accountancy_code		= $obj->accountancy_code;
+				$this->thm		= $obj->thm;
 
 				$this->datec				= $this->db->jdate($obj->datec);
 				$this->datem				= $this->db->jdate($obj->datem);
@@ -1135,6 +1138,7 @@ class User extends CommonObject
 		$this->zip			= empty($this->zip)?'':$this->zip;
 		$this->town			= empty($this->town)?'':$this->town;
 		$this->accountancy_code = trim($this->accountancy_code);
+		$this->thm = price2num($this->thm);
 
 		// Check parameters
 		if (! empty($conf->global->USER_MAIL_REQUIRED) && ! isValidEMail($this->email))
@@ -1165,6 +1169,7 @@ class User extends CommonObject
 		$sql.= ", job = '".$this->db->escape($this->job)."'";
 		$sql.= ", signature = '".$this->db->escape($this->signature)."'";
 		$sql.= ", accountancy_code = '".$this->db->escape($this->accountancy_code)."'";
+		$sql.= ", thm = ".$this->thm;
 		$sql.= ", note = '".$this->db->escape($this->note)."'";
 		$sql.= ", photo = ".($this->photo?"'".$this->db->escape($this->photo)."'":"null");
 		$sql.= ", openid = ".($this->openid?"'".$this->db->escape($this->openid)."'":"null");