diff --git a/Abrechnung/module.php b/Abrechnung/module.php
index 5394be9..6a2128b 100644
--- a/Abrechnung/module.php
+++ b/Abrechnung/module.php
@@ -91,11 +91,50 @@ class Abrechnung extends IPSModule
     {
         parent::ApplyChanges();
         $this->RegisterTariffVariableProfiles();
+        $this->RegisterTariffWebhook();
         $this->EnsureVisuTariffObjects();
         $this->InitializeVisuTariffDefaults();
         $this->UpdateTariffOverview();
     }
 
+    private function RegisterTariffWebhook()
+    {
+        $webhook = $this->GetTariffWebhookPath();
+        $ids = @IPS_GetInstanceListByModuleID('{015A6EB8-D6E5-4B93-B496-0D3F77AE9FE1}');
+        if (empty($ids)) {
+            return;
+        }
+
+        $hookID = $ids[0];
+        $hooks = json_decode(IPS_GetProperty($hookID, 'Hooks'), true);
+        $hooks = is_array($hooks) ? $hooks : [];
+        $found = false;
+
+        foreach ($hooks as $index => $hook) {
+            if (($hook['Hook'] ?? '') !== $webhook) {
+                continue;
+            }
+            $hooks[$index]['TargetID'] = $this->InstanceID;
+            $found = true;
+            break;
+        }
+
+        if (!$found) {
+            $hooks[] = [
+                'Hook' => $webhook,
+                'TargetID' => $this->InstanceID
+            ];
+        }
+
+        IPS_SetProperty($hookID, 'Hooks', json_encode($hooks));
+        IPS_ApplyChanges($hookID);
+    }
+
+    private function GetTariffWebhookPath()
+    {
+        return '/hook/belevo_abrechnung_tariffs_' . $this->InstanceID;
+    }
+
     private function EnsureVisuTariffObjects()
     {
         $this->RegisterVariableString('VisuTariffOverview', 'Tarife bearbeiten', '~HTMLBox', 10);
@@ -347,12 +386,11 @@ class Abrechnung extends IPSModule
             $typeOptions .= '<option value="' . $this->h($type) . '">' . $this->h($type) . '</option>';
         }
 
-        $instanceID = (int)$this->InstanceID;
-        $payloadID = (int)$this->GetIDForIdent('VisuTariffPayload');
+        $webhookPath = $this->GetTariffWebhookPath();
         $status = $this->h(@GetValue($this->GetIDForIdent('VisuTariffStatus')));
 
         $html = "
-<div class='belevo-tariffs' data-instance='" . $instanceID . "'>
+<div class='belevo-tariffs'>
 <style>
 .belevo-tariffs{font-family:Arial,Helvetica,sans-serif;font-size:13px;color:#202124;max-width:980px}
 .belevo-tariffs table{width:100%;border-collapse:collapse;background:#fff}
@@ -366,6 +404,8 @@ class Abrechnung extends IPSModule
 .belevo-tariffs button.danger{color:#9b1c1c;border-color:#d7a6a6;background:#fff5f5}
 .belevo-tariffs .status{margin-left:8px;color:#4b5563}
 </style>
+<form method='post' action='" . $this->h($webhookPath) . "' target='belevo_tariff_save_frame'>
+<input type='hidden' name='payload' value=''>
 <table>
 <thead>
 <tr>
@@ -380,17 +420,25 @@ class Abrechnung extends IPSModule
 </table>
 <div class='actions'>
 <button type='button' data-action='add'>Zeile hinzufügen</button>
-<button type='button' data-action='save' class='primary'>Tarife speichern</button>
+<button type='submit' data-action='save' class='primary'>Tarife speichern</button>
 <span class='status'>" . $status . "</span>
 </div>
+</form>
+<iframe name='belevo_tariff_save_frame' style='display:none;width:0;height:0;border:0'></iframe>
 <template data-row-template>" . $this->BuildTariffEditorRow('Netztarif', date('Y-01-01'), date('Y-12-31'), '0.000') . "</template>
 <script>
 (function(){
 var root=document.currentScript.closest('.belevo-tariffs');
 if(!root||root.dataset.bound==='1'){return;}
 root.dataset.bound='1';
+var form=root.querySelector('form');
 var tbody=root.querySelector('tbody');
 var status=root.querySelector('.status');
+window.addEventListener('message',function(event){
+ if(event&&event.data&&event.data.type==='belevoTariffSave'){
+  status.textContent=event.data.message||'Gespeichert.';
+ }
+});
 function bindDelete(row){
  var btn=row.querySelector('[data-action=delete]');
  if(btn){btn.onclick=function(){row.parentNode.removeChild(row);};}
@@ -404,7 +452,7 @@ root.querySelector('[data-action=add]').onclick=function(){
  tbody.appendChild(row);
  bindDelete(row);
 };
-root.querySelector('[data-action=save]').onclick=function(){
+form.onsubmit=function(){
  var rows=[];
  Array.prototype.forEach.call(tbody.querySelectorAll('tr'),function(row){
   var type=row.querySelector('[data-field=unit_type]').value;
@@ -415,17 +463,10 @@ root.querySelector('[data-action=save]').onclick=function(){
    rows.push({unit_type:type,start:start,end:end,price:price});
   }
  });
- var payload=JSON.stringify(rows);
+ form.querySelector('input[name=payload]').value=JSON.stringify(rows);
  status.textContent='Speichern...';
- if(typeof requestAction==='function'){
-  requestAction(" . $payloadID . ",payload);
-  status.textContent='Speichern gesendet.';
- }else if(window.parent&&typeof window.parent.requestAction==='function'){
-  window.parent.requestAction(" . $payloadID . ",payload);
-  status.textContent='Speichern gesendet.';
- }else{
-  status.textContent='Fehler: requestAction nicht verfügbar.';
- }
+ window.setTimeout(function(){status.textContent='Gesendet. Tabelle wird nach dem Speichern aktualisiert.';},800);
+ return true;
 };
 })();
 </script>
@@ -599,6 +640,23 @@ root.querySelector('[data-action=save]').onclick=function(){
         }
     }
 
+    public function ProcessHookData()
+    {
+        $message = '';
+        try {
+            $payload = $_POST['payload'] ?? '';
+            $message = $this->SaveTariffTableFromPayload($payload);
+            SetValue($this->GetIDForIdent('VisuTariffStatus'), $message);
+            $this->UpdateTariffOverview();
+        } catch (Throwable $e) {
+            $message = 'Fehler beim Speichern der Tarifliste: ' . $e->getMessage();
+            SetValue($this->GetIDForIdent('VisuTariffStatus'), $message);
+        }
+
+        header('Content-Type: text/html; charset=utf-8');
+        echo '<!doctype html><html><body><script>try{parent.postMessage({type:"belevoTariffSave",message:' . json_encode($message) . '}, "*");}catch(e){}</script>' . $this->h($message) . '</body></html>';
+    }
+
     // ====================== PDF-Erstellung ======================
 
 public function GenerateInvoices()