diff --git a/src/dw_design_system/dwds/components/cta.html b/src/dw_design_system/dwds/components/cta.html
index e10d6529c..e720d066f 100644
--- a/src/dw_design_system/dwds/components/cta.html
+++ b/src/dw_design_system/dwds/components/cta.html
@@ -4,4 +4,9 @@
         {% if description %}<p>{{ description }}</p>{% endif %}
         {{ extra_content }}
     </div>
+    {% if footer_text %}
+        <div class="content-footer content-stack">
+            <p>{{ footer_text }}</p>
+        </div>
+    {% endif %}
 </div>
diff --git a/src/peoplefinder/services/person.py b/src/peoplefinder/services/person.py
index 92457e7e7..31f66526b 100644
--- a/src/peoplefinder/services/person.py
+++ b/src/peoplefinder/services/person.py
@@ -26,6 +26,7 @@
     AuditLogService,
     ObjectRepr,
 )
+from peoplefinder.services.team import TeamService
 from peoplefinder.tasks import notify_user_about_profile_changes, person_update_notifier
 from peoplefinder.types import EditSections, ProfileSections
 from user.models import User
@@ -299,6 +300,9 @@ def profile_updated(
         # Notify external services
         person_update_notifier.delay(person.id)
 
+        for team_id in person.roles.all().values_list("team__pk", flat=True).distinct():
+            TeamService().clear_profile_completion_cache(team_id)
+
     def profile_deletion_initiated(
         self, request: Optional[HttpRequest], person: Person, initiated_by: User
     ) -> None:
diff --git a/src/peoplefinder/services/team.py b/src/peoplefinder/services/team.py
index 3982e0728..64d030870 100644
--- a/src/peoplefinder/services/team.py
+++ b/src/peoplefinder/services/team.py
@@ -1,6 +1,7 @@
 from typing import Iterator, Optional, TypedDict
 
 from django.contrib.postgres.aggregates import ArrayAgg
+from django.core.cache import cache
 from django.db import connection, transaction
 from django.db.models import (
     Case,
@@ -16,7 +17,7 @@
 from django.db.models.functions import Concat
 from django.utils.text import slugify
 
-from peoplefinder.models import AuditLog, Team, TeamMember, TeamTree
+from peoplefinder.models import AuditLog, Person, Team, TeamMember, TeamTree
 from peoplefinder.services.audit_log import (
     AuditLogSerializer,
     AuditLogService,
@@ -111,7 +112,7 @@ def update_team_parent(self, team: Team, parent: Team) -> None:
                 [team.id, parent.id],
             )
 
-    def get_all_child_teams(self, parent: Team) -> QuerySet:
+    def get_all_child_teams(self, parent: Team) -> QuerySet[Team]:
         """Return all child teams of the given parent team.
 
         Args:
@@ -261,14 +262,10 @@ def can_team_be_deleted(self, team: Team) -> tuple[bool, list[str]]:
         reasons = []
 
         sub_teams = self.get_all_child_teams(team)
-
         if sub_teams:
             reasons.append("sub-teams")
 
-        has_members = TeamMember.active.filter(
-            Q(team=team) | Q(team__in=sub_teams)
-        ).exists()
-
+        has_members = self.get_team_members(team).exists()
         if has_members:
             reasons.append("members")
 
@@ -310,6 +307,48 @@ def team_deleted(self, team: Team, deleted_by: User) -> None:
         """
         AuditLogService.log(AuditLog.Action.DELETE, deleted_by, team)
 
+    def get_team_members(self, team: Team) -> QuerySet[TeamMember]:
+        sub_teams = self.get_all_child_teams(team)
+
+        return TeamMember.active.filter(Q(team=team) | Q(team__in=sub_teams))
+
+    def get_profile_completion_cache_key(self, team_pk: int) -> str:
+        return f"team_{team_pk}__profile_completion"
+
+    def clear_profile_completion_cache(self, team_pk: int):
+        cache.delete(self.get_profile_completion_cache_key(team_pk))
+
+    def profile_completion(self, team: Team) -> float | None:
+        """
+        Calculate the percentage of users in the team with 100% profile
+        completion.
+
+        Returns:
+            float: A percentage
+        """
+        cache_key = self.get_profile_completion_cache_key(team.pk)
+        if cached_value := cache.get(cache_key, None):
+            return cached_value
+
+        # Get all people from all teams
+        people = Person.objects.filter(
+            id__in=Subquery(self.get_team_members(team).values("person_id"))
+        )
+        completed_profiles = people.filter(profile_completion__gte=100)
+
+        total_members = len(people)
+        total_completed_profiles = len(completed_profiles)
+
+        if total_members == 0:
+            return None
+
+        completed_profile_percent = total_completed_profiles / total_members
+
+        # Cache the result for an hour.
+        timeout = 60 * 60
+        cache.set(cache_key, completed_profile_percent, timeout)
+        return completed_profile_percent
+
 
 class TeamAuditLogSerializer(AuditLogSerializer):
     model = Team
diff --git a/src/peoplefinder/templates/peoplefinder/components/team-card-new.html b/src/peoplefinder/templates/peoplefinder/components/team-card-new.html
index cfdea91d9..529de27d5 100644
--- a/src/peoplefinder/templates/peoplefinder/components/team-card-new.html
+++ b/src/peoplefinder/templates/peoplefinder/components/team-card-new.html
@@ -2,4 +2,4 @@
 
 {% url 'team-view' team.slug as team_url %}
 
-{% include "dwds/components/cta_card.html" with title=team.name url=team_url extra_content=team.description|markdown|truncatewords_html:25 %}
+{% include "dwds/components/cta_card.html" with title=team.name url=team_url extra_content=team.description|markdown|truncatewords_html:25 footer_text=profile_completion %}
diff --git a/src/peoplefinder/templates/peoplefinder/team.html b/src/peoplefinder/templates/peoplefinder/team.html
index 7f9575872..3cc11256d 100644
--- a/src/peoplefinder/templates/peoplefinder/team.html
+++ b/src/peoplefinder/templates/peoplefinder/team.html
@@ -23,7 +23,8 @@ <h1>
                             {% if team.abbreviation %}({{ team.abbreviation }}){% endif %}
                         </h1>
 
-                        <div class="text-small" data-testid="description">{{ team.description|markdown }}</div>
+                        {% if profile_completion %}<p class="text-small">{{ profile_completion }}</p>{% endif %}
+                        <div data-testid="description">{{ team.description|markdown }}</div>
                         <div class="dwds-button-group">
                             {% if perms.peoplefinder.change_team %}
                                 <a class="dwds-button dwds-button--secondary dwds-button--inline"
@@ -77,7 +78,9 @@ <h2>Team leader{{ leaders|length|pluralize }}</h2>
             <h2>Teams within {{ team.short_name }}</h2>
             <div class="content-grid grid-cards-auto-fill">
                 {% for team in sub_teams %}
-                    <div class="dwds-content-item-card">{% include 'peoplefinder/components/team-card-new.html' with team=team %}</div>
+                    <div class="dwds-content-item-card">
+                        {% include 'peoplefinder/components/team-card-new.html' with team=team profile_completion=team.profile_completion %}
+                    </div>
                 {% endfor %}
             </div>
         {% endif %}
diff --git a/src/peoplefinder/views/team.py b/src/peoplefinder/views/team.py
index d63ac3d5d..820b0f2cc 100644
--- a/src/peoplefinder/views/team.py
+++ b/src/peoplefinder/views/team.py
@@ -1,7 +1,7 @@
 from django.contrib.auth.mixins import PermissionRequiredMixin
 from django.core.exceptions import SuspiciousOperation
 from django.db import models, transaction
-from django.db.models import Avg, QuerySet
+from django.db.models import QuerySet
 from django.http import HttpRequest
 from django.http.response import HttpResponse as HttpResponse
 from django.shortcuts import redirect
@@ -12,7 +12,7 @@
 from django.views.generic.edit import CreateView, DeleteView, UpdateView
 
 from peoplefinder.forms.team import TeamForm
-from peoplefinder.models import Person, Team, TeamMember
+from peoplefinder.models import Team, TeamMember
 from peoplefinder.services.audit_log import AuditLogService
 from peoplefinder.services.team import TeamService
 
@@ -54,8 +54,19 @@ def parent_teams(self) -> QuerySet[Team]:
         return TeamService().get_all_parent_teams(self.object)
 
     @cached_property
-    def sub_teams(self) -> QuerySet[Team]:
-        return TeamService().get_immediate_child_teams(self.object)
+    def sub_teams(self) -> list[Team]:
+        sub_teams = []
+
+        team_service = TeamService()
+        for sub_team in team_service.get_immediate_child_teams(self.object):
+            profile_completion = team_service.profile_completion(sub_team)
+            if profile_completion:
+                sub_team.profile_completion = (
+                    f"{profile_completion:.1%} of profiles complete"
+                )
+            sub_teams.append(sub_team)
+
+        return sub_teams
 
     @cached_property
     def leaders(self) -> list[TeamMember]:
@@ -96,23 +107,17 @@ def get_context_data(self, **kwargs: dict) -> dict:
 
         team_service = TeamService()
 
+        if profile_completion := team_service.profile_completion(self.object):
+            context["profile_completion"] = (
+                f"{profile_completion:.1%} of profiles complete"
+            )
+
         if self.request.user.has_perm("peoplefinder.delete_team"):
             (
                 context["can_team_be_deleted"],
                 context["reasons_team_cannot_be_deleted"],
             ) = team_service.can_team_be_deleted(self.object)
 
-        if self.sub_teams:
-            # Warning: Multiple requests per sub-team. This might need optimising in the
-            # future.
-            for sub_team in self.sub_teams:
-                sub_team.avg_profile_completion = Person.active.filter(
-                    teams__in=[
-                        sub_team,
-                        *team_service.get_all_child_teams(sub_team),
-                    ]
-                ).aggregate(Avg("profile_completion"))["profile_completion__avg"]
-
         if self.request.user.has_perms(
             ["peoplefinder.change_team", "peoplefinder.view_auditlog"]
         ):