diff --git a/hr_holidays_overlap/models/hr_leave_type.py b/hr_holidays_overlap/models/hr_leave_type.py
index c598b8ad..7a23ed13 100644
--- a/hr_holidays_overlap/models/hr_leave_type.py
+++ b/hr_holidays_overlap/models/hr_leave_type.py
@@ -25,17 +25,17 @@ def _get_employees_days_per_allocation(self, employee_ids, date=None):
             for possible_overlap in HrLeave.search(
                 [
                     ("employee_id", "=", employee_id),
-                    ("state", "not in", ("draft", "refuse")),
+                    ("state", "=", "validate"),
                     ("holiday_status_id.can_overlap", "=", True),
                 ]
             ):
                 for overlap in HrLeave.search(
                     [
                         ("employee_id", "=", employee_id),
-                        ("state", "not in", ("draft", "refuse")),
+                        ("state", "in", ("confirm", "validate1", "validate")),
                         ("id", "not in", possible_overlap.ids),
-                        ("date_from", "<", possible_overlap.date_to),
-                        ("date_to", ">", possible_overlap.date_from),
+                        ("date_from", "<=", possible_overlap.date_to),
+                        ("date_to", ">=", possible_overlap.date_from),
                         ("holiday_status_id", "in", self.ids),
                     ]
                 ):
@@ -51,8 +51,9 @@ def _get_employees_days_per_allocation(self, employee_ids, date=None):
                     )[employee_id]["days"]
                     for allocation, allocation_days in allocation_dict.items():
                         if (
-                            allocation
-                            and allocation.date_to
+                            not allocation
+                            or isinstance(allocation, str)
+                            or allocation.date_to
                             and (
                                 allocation.date_to < date or allocation.date_from > date
                             )
@@ -60,7 +61,18 @@ def _get_employees_days_per_allocation(self, employee_ids, date=None):
                             continue
                         allocation_days["virtual_remaining_leaves"] += number_of_days
                         allocation_days["virtual_leaves_taken"] -= number_of_days
-                        allocation_days["remaining_leaves"] += number_of_days
-                        allocation_days["leaves_taken"] -= number_of_days
+                        if possible_overlap.state == "validate":
+                            allocation_days["remaining_leaves"] += number_of_days
+                            allocation_days["leaves_taken"] -= number_of_days
                         break
+                    if "error" in allocation_dict:
+                        allocation_dict["error"][
+                            "virtual_remaining_leaves"
+                        ] += number_of_days
+                        allocation_dict[False][
+                            "virtual_remaining_leaves"
+                        ] += number_of_days
+                        if not allocation_dict["error"]["virtual_remaining_leaves"]:
+                            del allocation_dict["error"]
+                            del allocation_dict[False]
         return result
diff --git a/hr_holidays_overlap/tests/test_hr_holidays_overlap.py b/hr_holidays_overlap/tests/test_hr_holidays_overlap.py
index cd750f08..c2303741 100644
--- a/hr_holidays_overlap/tests/test_hr_holidays_overlap.py
+++ b/hr_holidays_overlap/tests/test_hr_holidays_overlap.py
@@ -19,7 +19,7 @@ def setUp(self):
                 "name": "Paid leave",
                 "state": "confirm",
                 "holiday_status_id": self.env.ref("hr_holidays.holiday_status_cl").id,
-                # those two are needed to circumvent hr.leave#copy_data's check
+                # those two are needed to bypass hr.leave#copy_data's check
                 "date_from": demo_sick_leave.date_to,
                 "date_to": demo_sick_leave.date_to + timedelta(days=2),
             }
@@ -47,6 +47,35 @@ def test_overlap(self):
             paid_leave.holiday_status_id.remaining_leaves,
             19,
         )
+        # be sure we can use all 19 days for leave
+        new_leave = self.paid_leave.copy(
+            default={
+                "name": "Paid leave",
+                "state": "confirm",
+                "holiday_status_id": self.env.ref("hr_holidays.holiday_status_cl").id,
+                "date_from": self.paid_leave.date_to,
+                "date_to": self.paid_leave.date_to + timedelta(days=27),
+            }
+        )
+        new_leave.action_validate()
+        self.assertEqual(new_leave.number_of_days, 19)
+        self.assertEqual(new_leave.holiday_status_id.virtual_remaining_leaves, 0)
+
+        with self.assertRaisesRegex(
+            ValidationError,
+            "The number of remaining time off is not sufficient for this time off type.",
+        ):
+            self.paid_leave.copy(
+                default={
+                    "name": "Paid leave",
+                    "state": "confirm",
+                    "holiday_status_id": self.env.ref(
+                        "hr_holidays.holiday_status_cl"
+                    ).id,
+                    "date_from": new_leave.date_from,
+                    "date_to": new_leave.date_to + timedelta(days=1),
+                }
+            )
 
     def test_no_overlap(self):
         """Test that we still don't allow overlapping for types not configured accordingly"""