diff --git a/chrono/agendas/models.py b/chrono/agendas/models.py
index 803a666d..4c8d5824 100644
--- a/chrono/agendas/models.py
+++ b/chrono/agendas/models.py
@@ -35,6 +35,7 @@ from django.core.validators import MaxValueValidator
 from django.db import models, transaction
 from django.db.models import Count, Q, Case, When
 from django.urls import reverse
+from django.utils import functional
 from django.utils.dates import WEEKDAYS
 from django.utils.encoding import force_text
 from django.utils.formats import date_format
@@ -776,6 +777,10 @@ class Event(models.Model):
         # label can be empty
         return slugify(self.label or ('%s-event' % self.agenda.label))
 
+    @functional.cached_property
+    def main_list_full(self):
+        return bool(self.booked_places >= self.places)
+
     def check_full(self):
         self.full = bool(
             (self.booked_places >= self.places and self.waiting_list_places == 0)
diff --git a/chrono/manager/templates/chrono/manager_events_agenda_month_view.html b/chrono/manager/templates/chrono/manager_events_agenda_month_view.html
index 5be3728c..a063ebce 100644
--- a/chrono/manager/templates/chrono/manager_events_agenda_month_view.html
+++ b/chrono/manager/templates/chrono/manager_events_agenda_month_view.html
@@ -9,7 +9,7 @@
   <ul class="objects-list single-links">
   {% for event in object_list %}
     <li class="{% if event.booked_places_count > event.places %}overbooking{% endif %}
-               {% if event.full %}full{% endif %}
+               {% if event.main_list_full %}full{% endif %}
                {% if not event.in_bookable_period %}not-{% endif %}bookable"
         {% if event.places %}
           data-total="{{event.places}}" data-booked="{{event.booked_places_count}}"
@@ -17,7 +17,7 @@
           data-total="{{event.waiting_list_places}}" data-booked="{{event.waiting_list_count}}"
         {% endif %}
         ><a href="{% url 'chrono-manager-event-view' pk=agenda.id event_pk=event.id %}">
-        {% if event.full %}<span class="full tag">{% trans "Full" %}</span>{% endif %}
+        {% if event.main_list_full %}<span class="full tag">{% trans "Full" %}</span>{% endif %}
         {% if event.label %}{{event.label}} / {% endif %}
         {{ event.start_datetime }}
         (
diff --git a/tests/test_manager.py b/tests/test_manager.py
index cdae53f6..3d0f5d0a 100644
--- a/tests/test_manager.py
+++ b/tests/test_manager.py
@@ -2449,7 +2449,7 @@ def test_agenda_events_month_view(app, admin_user, manager_user, api_user):
         app.get(
             '/manage/agendas/%s/%s/%s/' % (agenda.id, event.start_datetime.year, event.start_datetime.month)
         )
-        assert len(ctx.captured_queries) == 5
+        assert len(ctx.captured_queries) == 6
 
     # current month still doesn't have events
     resp = app.get('/manage/agendas/%s/%s/%s/' % (agenda.id, today.year, today.month))