diff --git a/plugins/woocommerce/changelog/fix-update-rest-api-order-totals-hpos b/plugins/woocommerce/changelog/fix-update-rest-api-order-totals-hpos
new file mode 100644
index 00000000000..4b2d40bb008
--- /dev/null
+++ b/plugins/woocommerce/changelog/fix-update-rest-api-order-totals-hpos
@@ -0,0 +1,4 @@
+Significance: patch
+Type: fix
+
+Ensure the wc/v3/reports/orders/totals endpoint is compatible with HPOS.
diff --git a/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-report-orders-totals-controller.php b/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-report-orders-totals-controller.php
index 77c74f6167f..dd13c25bc96 100644
--- a/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-report-orders-totals-controller.php
+++ b/plugins/woocommerce/includes/rest-api/Controllers/Version3/class-wc-rest-report-orders-totals-controller.php
@@ -8,6 +8,8 @@
  * @since   3.5.0
  */
 
+use Automattic\WooCommerce\Utilities\OrderUtil;
+
 defined( 'ABSPATH' ) || exit;
 
 /**
@@ -39,18 +41,18 @@ class WC_REST_Report_Orders_Totals_Controller extends WC_REST_Reports_Controller
 	 * @return array
 	 */
 	protected function get_reports() {
-		$totals = wp_count_posts( 'shop_order' );
+		$totals = OrderUtil::get_count_for_type( 'shop_order' );
 		$data   = array();
 
 		foreach ( wc_get_order_statuses() as $slug => $name ) {
-			if ( ! isset( $totals->$slug ) ) {
+			if ( ! array_key_exists( $slug, $totals ) ) {
 				continue;
 			}
 
 			$data[] = array(
 				'slug'  => str_replace( 'wc-', '', $slug ),
 				'name'  => $name,
-				'total' => (int) $totals->$slug,
+				'total' => (int) $totals[ $slug ],
 			);
 		}
 
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/rest-api/Tests/Version3/reports-orders-totals.php b/plugins/woocommerce/tests/legacy/unit-tests/rest-api/Tests/Version3/reports-orders-totals.php
index 95e1ec02632..8c8cf76709a 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/rest-api/Tests/Version3/reports-orders-totals.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/rest-api/Tests/Version3/reports-orders-totals.php
@@ -6,8 +6,16 @@
  * @since 3.5.0
  */
 
+use Automattic\WooCommerce\RestApi\UnitTests\Helpers\OrderHelper;
+use Automattic\WooCommerce\RestApi\UnitTests\HPOSToggleTrait;
+
+/**
+ * WC_Tests_API_Reports_Orders_Totals.
+ */
 class WC_Tests_API_Reports_Orders_Totals extends WC_REST_Unit_Test_Case {
 
+	use HPOSToggleTrait;
+
 	/**
 	 * Setup our test server, endpoints, and user info.
 	 */
@@ -31,7 +39,7 @@ class WC_Tests_API_Reports_Orders_Totals extends WC_REST_Unit_Test_Case {
 	}
 
 	/**
-	 * Test getting all product reviews.
+	 * Test getting order totals.
 	 *
 	 * @since 3.5.0
 	 */
@@ -60,6 +68,45 @@ class WC_Tests_API_Reports_Orders_Totals extends WC_REST_Unit_Test_Case {
 		$this->assertEquals( $data, $report );
 	}
 
+	/**
+	 * Test getting order totals with HPOS enabled and some orders pending sync.
+	 *
+	 * @since 8.9.0
+	 */
+	public function test_get_reports_with_hpos_enabled_and_sync_off() {
+		$this->toggle_cot_authoritative( true );
+		$this->disable_cot_sync();
+
+		wp_set_current_user( $this->user );
+
+		// Create some orders with HPOS enabled.
+		$order_counts = array(
+			'wc-pending'    => 3,
+			'wc-processing' => 2,
+			'wc-on-hold'    => 1,
+		);
+		foreach ( $order_counts as $status => $count ) {
+			for ( $i = 0; $i < $count; $i++ ) {
+				$order = OrderHelper::create_order();
+				$order->set_status( $status );
+				$order->save();
+			}
+		}
+
+		$response = $this->server->dispatch( new WP_REST_Request( 'GET', '/wc/v3/reports/orders/totals' ) );
+		$report   = $response->get_data();
+
+		$this->assertEquals( 200, $response->get_status() );
+		$this->assertEquals( count( wc_get_order_statuses() ), count( $report ) );
+		foreach ( $report as $data ) {
+			if ( array_key_exists( 'wc-' . $data['slug'], $order_counts ) ) {
+				$this->assertEquals( $order_counts[ 'wc-' . $data['slug'] ], $data['total'], 'Status: ' . $data['slug'] );
+			} else {
+				$this->assertEquals( 0, $data['total'], 'Status: ' . $data['slug'] );
+			}
+		}
+	}
+
 	/**
 	 * Tests to make sure product reviews cannot be viewed without valid permissions.
 	 *