diff --git a/Abrechnung/module.php b/Abrechnung/module.php
index 858e616..0496c51 100644
--- a/Abrechnung/module.php
+++ b/Abrechnung/module.php
@@ -307,10 +307,25 @@ private function AddMeterToPDFRow($meter, $tariffs, $from, $to, $type)
     }
 
     // 2️⃣ Zeitstempel konvertieren und sortieren
-    foreach ($filteredTariffs as &$t) {
+    foreach ($filteredTariffs as &$t) {// --- Fix: falls Start/End als verschachteltes JSON vorliegen ---
+        if (is_string($t['start']) && str_starts_with(trim($t['start']), '{')) {
+            $startObj = json_decode($t['start'], true);
+            if (is_array($startObj)) {
+                $t['start'] = sprintf('%04d-%02d-%02d 00:00:00', $startObj['year'], $startObj['month'], $startObj['day']);
+            }
+        }
+        if (is_string($t['end']) && str_starts_with(trim($t['end']), '{')) {
+            $endObj = json_decode($t['end'], true);
+            if (is_array($endObj)) {
+                $t['end'] = sprintf('%04d-%02d-%02d 23:59:59', $endObj['year'], $endObj['month'], $endObj['day']);
+            }
+        }
+
+        // --- danach wie bisher ---
         $t['start_ts'] = is_numeric($t['start']) ? intval($t['start']) : strtotime($t['start']);
         $t['end_ts']   = is_numeric($t['end'])   ? intval($t['end'])   : strtotime($t['end']);
 
+
         if (!$t['start_ts'] || !$t['end_ts']) {
             IPS_LogMessage('Abrechnung', "⚠ Ungültiger Tarifzeitraum in Tarifdefinition: " . json_encode($t));
         } else {