diff --git a/erpnext/projects/doctype/project/test_project.py b/erpnext/projects/doctype/project/test_project.py
index d85c82612a..62905385a3 100644
--- a/erpnext/projects/doctype/project/test_project.py
+++ b/erpnext/projects/doctype/project/test_project.py
@@ -37,7 +37,7 @@ class TestProject(unittest.TestCase):
 
 		task1 = task_exists("Test Template Task Parent")
 		if not task1:
-			task1 = create_task(subject="Test Template Task Parent", is_group=1, is_template=1, begin=1, duration=1)
+			task1 = create_task(subject="Test Template Task Parent", is_group=1, is_template=1, begin=1, duration=4)
 
 		task2 = task_exists("Test Template Task Child 1")
 		if not task2:
@@ -52,7 +52,7 @@ class TestProject(unittest.TestCase):
 		tasks = frappe.get_all('Task', ['subject','exp_end_date','depends_on_tasks', 'name', 'parent_task'], dict(project=project.name), order_by='creation asc')
 
 		self.assertEqual(tasks[0].subject, 'Test Template Task Parent')
-		self.assertEqual(getdate(tasks[0].exp_end_date), calculate_end_date(project, 1, 1))
+		self.assertEqual(getdate(tasks[0].exp_end_date), calculate_end_date(project, 1, 4))
 
 		self.assertEqual(tasks[1].subject, 'Test Template Task Child 1')
 		self.assertEqual(getdate(tasks[1].exp_end_date), calculate_end_date(project, 1, 3))
diff --git a/erpnext/projects/doctype/task/task.py b/erpnext/projects/doctype/task/task.py
index a2095c95d5..71163485d2 100755
--- a/erpnext/projects/doctype/task/task.py
+++ b/erpnext/projects/doctype/task/task.py
@@ -30,6 +30,7 @@ class Task(NestedSet):
 
     def validate(self):
         self.validate_dates()
+        self.validate_parent_expected_end_date()
         self.validate_parent_project_dates()
         self.validate_progress()
         self.validate_status()
@@ -45,6 +46,12 @@ class Task(NestedSet):
             frappe.throw(_("{0} can not be greater than {1}").format(frappe.bold("Actual Start Date"), \
                 frappe.bold("Actual End Date")))
 
+    def validate_parent_expected_end_date(self):
+        if self.parent_task:
+            parent_exp_end_date = frappe.db.get_value("Task", self.parent_task, "exp_end_date")
+            if parent_exp_end_date and getdate(self.get("exp_end_date")) > getdate(parent_exp_end_date):
+                frappe.throw(_("Expected End Date should be less than or equal to parent task's Expected End Date {0}.").format(getdate(parent_exp_end_date)))
+
     def validate_parent_project_dates(self):
         if not self.project or frappe.flags.in_test:
             return