diff --git a/Koha/REST/V1/Patrons.pm b/Koha/REST/V1/Patrons.pm
index a6f9fb6657..2531eac7aa 100644
--- a/Koha/REST/V1/Patrons.pm
+++ b/Koha/REST/V1/Patrons.pm
@@ -503,4 +503,26 @@ sub guarantors_can_see_checkouts {
     };
 }
 
+=head3 overdues_count
+
+Controller function that returns the count of overdue checkouts for a patron.
+
+=cut
+
+sub overdues_count {
+    my $c = shift->openapi->valid_input or return;
+
+    return try {
+        my $patron = Koha::Patrons->find( $c->param('patron_id') );
+        return $c->render_resource_not_found("Patron") unless $patron;
+
+        return $c->render(
+            status  => 200,
+            openapi => $patron->overdues->count,
+        );
+    } catch {
+        $c->unhandled_exception($_);
+    };
+}
+
 1;
diff --git a/api/v1/swagger/paths/patrons.yaml b/api/v1/swagger/paths/patrons.yaml
index 3621453c70..6c05c9ac4d 100644
--- a/api/v1/swagger/paths/patrons.yaml
+++ b/api/v1/swagger/paths/patrons.yaml
@@ -740,3 +740,43 @@
     x-koha-authorization:
       permissions:
         ill: "1"
+
+"/patrons/{patron_id}/overdues_count":
+  get:
+    x-mojo-to: Patrons#overdues_count
+    operationId: getPatronOverduesCount
+    tags:
+      - patrons
+    summary: Get count of overdue checkouts for a patron
+    parameters:
+      - $ref: "../swagger.yaml#/parameters/patron_id_pp"
+    produces:
+      - application/json
+    responses:
+      "200":
+        description: Overdue count
+        schema:
+          type: integer
+      "400":
+        description: Bad request
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+      "401":
+        description: Authentication required
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+      "403":
+        description: Access forbidden
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+      "404":
+        description: Patron not found
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+      "500":
+        description: Internal server error
+        schema:
+          $ref: "../swagger.yaml#/definitions/error"
+    x-koha-authorization:
+      permissions:
+        - borrowers: "list_borrowers"
diff --git a/api/v1/swagger/swagger.yaml b/api/v1/swagger/swagger.yaml
index b2497735f7..7beacae0f9 100644
--- a/api/v1/swagger/swagger.yaml
+++ b/api/v1/swagger/swagger.yaml
@@ -549,6 +549,8 @@ paths:
     $ref: ./paths/patrons.yaml#/~1patrons
   "/patrons/{patron_id}":
     $ref: "./paths/patrons.yaml#/~1patrons~1{patron_id}"
+  "/patrons/{patron_id}/overdues_count":
+    $ref: "./paths/patrons.yaml#/~1patrons~1{patron_id}~1overdues_count"
   "/patrons/{patron_id}/account":
     $ref: "./paths/patrons_account.yaml#/~1patrons~1{patron_id}~1account"
   "/patrons/{patron_id}/account/credits":
@@ -1515,6 +1517,9 @@ tags:
   - description: "Manage search field mappings"
     name: search_mappings
     x-displayName: Search mappings
+  - description: "Search patrons via Elasticsearch"
+    name: search
+    x-displayName: Search
   - description: "Manage SIP2 accounts"
     name: sip2_accounts
     x-displayName: SIP2 Accounts
diff --git a/t/db_dependent/api/v1/patrons_overdues_count.t b/t/db_dependent/api/v1/patrons_overdues_count.t
new file mode 100755
index 0000000000..7dd009808e
--- /dev/null
+++ b/t/db_dependent/api/v1/patrons_overdues_count.t
@@ -0,0 +1,94 @@
+#!/usr/bin/env perl
+
+# This file is part of Koha.
+#
+# Koha is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# Koha is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Koha; if not, see <https://www.gnu.org/licenses>.
+
+use Modern::Perl;
+
+use Test::NoWarnings;
+use Test::More tests => 3;
+use Test::Mojo;
+
+use t::lib::TestBuilder;
+use t::lib::Mocks;
+
+use Koha::Checkouts;
+use Koha::Database;
+use Koha::DateUtils qw( dt_from_string );
+
+my $schema  = Koha::Database->new->schema;
+my $builder = t::lib::TestBuilder->new;
+
+t::lib::Mocks::mock_preference( 'RESTBasicAuth', 1 );
+
+my $t = Test::Mojo->new('Koha::REST::V1');
+
+subtest 'overdues_count unauthorized' => sub {
+    plan tests => 2;
+
+    $schema->storage->txn_begin;
+
+    my $patron = $builder->build_object( { class => 'Koha::Patrons' } );
+
+    $t->get_ok( "/api/v1/patrons/" . $patron->borrowernumber . "/overdues_count" )->status_is(401);
+
+    $schema->storage->txn_rollback;
+};
+
+subtest 'overdues_count' => sub {
+    plan tests => 8;
+
+    $schema->storage->txn_begin;
+
+    my $librarian = $builder->build_object(
+        {
+            class => 'Koha::Patrons',
+            value => { flags => 2**4 }    # borrowers flag
+        }
+    );
+    my $password = 'thePassword123';
+    $librarian->set_password( { password => $password, skip_validation => 1 } );
+    my $userid = $librarian->userid;
+
+    my $patron = $builder->build_object( { class => 'Koha::Patrons' } );
+
+    # No checkouts - 0 overdues
+    $t->get_ok( "//$userid:$password\@/api/v1/patrons/" . $patron->borrowernumber . "/overdues_count" )
+        ->status_is(200)
+        ->json_is(0);
+
+    # Add an overdue checkout
+    my $item = $builder->build_sample_item();
+    $builder->build(
+        {
+            source => 'Issue',
+            value  => {
+                borrowernumber => $patron->borrowernumber,
+                itemnumber     => $item->itemnumber,
+                date_due       => '2020-01-01 00:00:00',
+                branchcode     => $patron->branchcode,
+            }
+        }
+    );
+
+    $t->get_ok( "//$userid:$password\@/api/v1/patrons/" . $patron->borrowernumber . "/overdues_count" )
+        ->status_is(200)
+        ->json_is(1);
+
+    # Non-existent patron
+    $t->get_ok("//$userid:$password\@/api/v1/patrons/999999999/overdues_count")->status_is(404);
+
+    $schema->storage->txn_rollback;
+};