diff --git a/src/ApiKernel.php b/src/ApiKernel.php
index 5ef6fc3..f5a3785 100755
--- a/src/ApiKernel.php
+++ b/src/ApiKernel.php
@@ -3420,6 +3420,21 @@ class ApiKernel
         $stmt->execute(array_merge([$customerId], $templateIds));
     }
 
+    private function incrementTemplateUsage(int $customerId, int $templateId): void
+    {
+        if ($customerId <= 0 || $templateId <= 0) return;
+        $usageTable = $this->lookupTableName('template_usage', 'emailtemplate_template_usage');
+        if (!$this->tableExists($usageTable)) return;
+        try {
+            $sql = "INSERT INTO `$usageTable` (`template_id`,`customer_id`,`render_count`,`last_rendered_at`) VALUES (:tid,:cid,1,NOW())
+                    ON DUPLICATE KEY UPDATE `render_count` = `render_count` + 1, `last_rendered_at` = NOW(), `customer_id` = VALUES(`customer_id`)";
+            $stmt = $this->pdo->prepare($sql);
+            $stmt->execute([':tid' => $templateId, ':cid' => $customerId]);
+        } catch (Throwable $e) {
+            // Usage-Tracking darf keine Fehler auslösen.
+        }
+    }
+
     private function extractIdList($raw): array
     {
         if ($raw === null) return [];