diff --git a/src/components/CreateWorksheetModal.jsx b/src/components/CreateWorksheetModal.jsx
index c8abbf8..325849a 100644
--- a/src/components/CreateWorksheetModal.jsx
+++ b/src/components/CreateWorksheetModal.jsx
@@ -31,7 +31,7 @@ const initialForm = (workorder, newStatus) => ({
   countsToPlan: false
 })
 
-export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCreate }) {
+export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCreate, aboHoursAllowed = true }) {
   const { user } = useAuth()
 
   const isAcquisition = workorder?.type === 'Akquise'
@@ -109,7 +109,7 @@ export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCre
         endTime: timeToWoms(formData.endTime),
         details: formData.details,
         isComment: formData.isComment,
-        countsToPlan: !formData.isComment && formData.countsToPlan,
+        countsToPlan: aboHoursAllowed && !formData.isComment && formData.countsToPlan,
         employeeShort: user?.prefs?.shortCode || '' // Aus User-Preferences
       }
 
@@ -191,17 +191,19 @@ export default function CreateWorksheetModal({ isOpen, onClose, workorder, onCre
                 </label>
               </div>
 
-              <div className="form-group">
-                <label style={{ display: 'flex', alignItems: 'center', gap: '8px' }} title="Zeit wird vom Stundenguthaben des Wartungs-Abos abgezogen und im Kundenportal angezeigt">
-                  <input
-                    type="checkbox"
-                    checked={formData.countsToPlan && !formData.isComment}
-                    disabled={formData.isComment}
-                    onChange={(e) => handleChange('countsToPlan', e.target.checked)}
-                  />
-                  Vom Abo-Stundenkonto abziehen
-                </label>
-              </div>
+              {aboHoursAllowed && (
+                <div className="form-group">
+                  <label style={{ display: 'flex', alignItems: 'center', gap: '8px' }} title="Zeit wird vom Stundenguthaben des Wartungs-Abos abgezogen und im Kundenportal angezeigt">
+                    <input
+                      type="checkbox"
+                      checked={formData.countsToPlan && !formData.isComment}
+                      disabled={formData.isComment}
+                      onChange={(e) => handleChange('countsToPlan', e.target.checked)}
+                    />
+                    Vom Abo-Stundenkonto abziehen
+                  </label>
+                </div>
+              )}
             </div>
 
             <div className="col col-6">
diff --git a/src/components/TicketCard.jsx b/src/components/TicketCard.jsx
index c7f2714..1a09995 100644
--- a/src/components/TicketCard.jsx
+++ b/src/components/TicketCard.jsx
@@ -16,6 +16,7 @@ import Tabs from './ui/Tabs'
 import Badge from './ui/Badge'
 import { StatusPill, UrgentPill } from './ui/StatusPill'
 import { useWorksheets } from '../hooks/useWorksheets'
+import { useCustomerAbo } from '../hooks/useCustomerAbo'
 import { useAuth } from '../context/AuthContext'
 import { databases, DATABASE_ID, COLLECTIONS } from '../lib/appwrite'
 import { canEditWorksheetTimes } from '../lib/ticketForm'
@@ -34,6 +35,11 @@ export default function TicketCard({ ticket, onUpdate }) {
   const [activeTab, setActiveTab] = useState('details')
   const [showCreateWorksheet, setShowCreateWorksheet] = useState(false)
   const [editTimesWorksheet, setEditTimesWorksheet] = useState(null)
+  // Abo-Stundenkonto gibt es nur bei Wartungs-Abo; erst laden, wenn Arbeitsblaetter gebraucht werden
+  const { hoursAllowed: aboHoursAllowed } = useCustomerAbo(
+    ticket.customerId,
+    (expanded && activeTab === 'worksheets') || showCreateWorksheet
+  )
 
   const { worksheets, loading: worksheetsLoading, createWorksheet, updateWorksheet, updateWorksheetTimes, getTotalTime } = useWorksheets(
     expanded ? ticket.woid : null
@@ -139,6 +145,7 @@ export default function TicketCard({ ticket, onUpdate }) {
                   canEditTimes={(ws) => canEditWorksheetTimes(ws, user, employee)}
                   onEditTimes={setEditTimesWorksheet}
                   onTogglePlan={handleTogglePlan}
+                  aboHoursAllowed={aboHoursAllowed}
                 />
               </div>
             )}
@@ -148,7 +155,7 @@ export default function TicketCard({ ticket, onUpdate }) {
         </div>
       )}
 
-      <CreateWorksheetModal isOpen={showCreateWorksheet} onClose={() => setShowCreateWorksheet(false)} workorder={ticket} onCreate={handleCreateWorksheet} />
+      <CreateWorksheetModal isOpen={showCreateWorksheet} onClose={() => setShowCreateWorksheet(false)} workorder={ticket} onCreate={handleCreateWorksheet} aboHoursAllowed={aboHoursAllowed} />
       {editTimesWorksheet && (
         <WorksheetTimesModal
           worksheet={editTimesWorksheet}
diff --git a/src/components/WorksheetList.jsx b/src/components/WorksheetList.jsx
index df23e89..29f370e 100644
--- a/src/components/WorksheetList.jsx
+++ b/src/components/WorksheetList.jsx
@@ -24,7 +24,7 @@ const headerButtonStyle = {
   marginRight: '8px',
 }
 
-export default function WorksheetList({ worksheets, totalTime, loading, onTogglePlan, canEditTimes, onEditTimes }) {
+export default function WorksheetList({ worksheets, totalTime, loading, onTogglePlan, aboHoursAllowed = true, canEditTimes, onEditTimes }) {
   const [expandedWorksheets, setExpandedWorksheets] = useState({})
   if (loading) {
     return (
@@ -177,7 +177,7 @@ export default function WorksheetList({ worksheets, totalTime, loading, onToggle
                           : <><FaPen className="me-1" /> Zeiten bearbeiten</>}
                       </button>
                     )}
-                    {onTogglePlan && !ws.isComment && Number(ws.totalTime) > 0 && (
+                    {onTogglePlan && !ws.isComment && Number(ws.totalTime) > 0 && (aboHoursAllowed || ws.countsToPlan) && (
                       <button
                         type="button"
                         className="btn btn-sm"
diff --git a/src/hooks/useCustomerAbo.js b/src/hooks/useCustomerAbo.js
new file mode 100644
index 0000000..2762d8a
--- /dev/null
+++ b/src/hooks/useCustomerAbo.js
@@ -0,0 +1,59 @@
+import { useEffect, useState } from 'react'
+import { getCustomerAbo } from '../lib/customerAdminApi'
+
+// Ergebnis je Kunde zwischengespeichert (nur Erfolge), laufende Abfragen werden geteilt
+const cache = new Map()
+const inflight = new Map()
+
+function load(customerId) {
+  if (cache.has(customerId)) return Promise.resolve(cache.get(customerId))
+  if (!inflight.has(customerId)) {
+    const p = getCustomerAbo(customerId)
+      .then((data) => {
+        const abo = { productKey: data?.productKey ?? null, active: Boolean(data?.active) }
+        cache.set(customerId, abo)
+        return abo
+      })
+      .finally(() => inflight.delete(customerId))
+    inflight.set(customerId, p)
+  }
+  return inflight.get(customerId)
+}
+
+// { productKey, active, loading, error, hoursAllowed }
+// hoursAllowed: darf der Schalter "Vom Abo-Stundenkonto abziehen" gezeigt werden?
+//  - nur bei aktivem Wartungs-Abo (Hosting-Abo hat kein Stundenkonto)
+//  - waehrend des Ladens nicht
+//  - bei Fehler der Schnittstelle ja (wie bisher), mit Warnung in der Konsole
+//  - ohne Kunde am Ticket nicht (es gibt kein Konto, das belastet werden koennte)
+// enabled=false: noch nichts laden (die Karten sind meist zugeklappt)
+export function useCustomerAbo(customerId, enabled = true) {
+  const [state, setState] = useState(() => ({
+    key: null, abo: null, error: false,
+  }))
+
+  useEffect(() => {
+    if (!customerId || !enabled) return undefined
+    let cancelled = false
+    load(customerId)
+      .then((abo) => { if (!cancelled) setState({ key: customerId, abo, error: false }) })
+      .catch((err) => {
+        console.warn('Abo-Status des Kunden konnte nicht geladen werden:', err?.message || err)
+        if (!cancelled) setState({ key: customerId, abo: null, error: true })
+      })
+    return () => { cancelled = true }
+  }, [customerId, enabled])
+
+  const ready = Boolean(customerId) && state.key === customerId
+  const cached = customerId ? cache.get(customerId) : null
+  const abo = ready && state.abo ? state.abo : cached
+  const error = ready && state.error
+  const loading = Boolean(customerId) && enabled && !abo && !error
+  const productKey = abo?.productKey ?? null
+  const active = abo?.active ?? false
+  const hoursAllowed = !customerId || loading
+    ? false
+    : error || (productKey === 'wartung' && active)
+
+  return { productKey, active, loading, error, hoursAllowed }
+}
diff --git a/src/lib/customerAdminApi.js b/src/lib/customerAdminApi.js
index fc76d21..b59a469 100644
--- a/src/lib/customerAdminApi.js
+++ b/src/lib/customerAdminApi.js
@@ -34,3 +34,8 @@ export async function updateCustomerWithPortalAccess(customerId, payload) {
 export async function deleteCustomerWithPortalAccess(customerId) {
   return adminFetch(`/api/admin/customers/${customerId}`, { method: 'DELETE' })
 }
+
+// Wartungs-/Hosting-Abo des Kunden: { productKey: 'wartung' | 'hosting' | null, active }
+export async function getCustomerAbo(customerId) {
+  return adminFetch(`/api/admin/customers/${encodeURIComponent(customerId)}/abo`, { method: 'GET' })
+}