diff --git a/src/components/customers/Customers.tsx b/src/components/customers/Customers.tsx
index 64c4d61..5edc136 100644
--- a/src/components/customers/Customers.tsx
+++ b/src/components/customers/Customers.tsx
@@ -17,7 +17,7 @@ export const Customers: React.FC = () => {
   const { navigate } = useRouter();
   const { addToast } = useToast();
   const [search, setSearch] = useState('');
-  const [status, setStatus] = useState<'active' | 'all'>('active');
+  const [status, setStatus] = useState<'active' | 'inactive' | 'all'>('active');
   const [form, setForm] = useState<{ customer: Customer | null } | null>(null);
   const [remove, setRemove] = useState<CustomerOverview | null>(null);
   const [expanded, setExpanded] = useState<number | null>(null);
@@ -26,7 +26,7 @@ export const Customers: React.FC = () => {
   const customers = useMemo(() => {
     const q = search.trim().toLowerCase();
     return (data?.customers ?? [])
-      .filter((c) => (status === 'all' || c.is_active) && (!q || `${c.name} ${c.short_name} ${c.city ?? ''}`.toLowerCase().includes(q)))
+      .filter((c) => (status === 'all' || (status === 'inactive' ? !c.is_active : c.is_active)) && (!q || `${c.name} ${c.short_name} ${c.city ?? ''}`.toLowerCase().includes(q)))
       .sort((a, b) => b.earned + b.open - (a.earned + a.open) || a.name.localeCompare(b.name, 'de'));
   }, [data, search, status]);
 
@@ -74,7 +74,16 @@ export const Customers: React.FC = () => {
           <Icon name="search" className="pointer-events-none absolute left-3 top-1/2 h-4 w-4 -translate-y-1/2 text-ink-400" />
           <input className={`${inputClass} pl-9`} placeholder="Kunde suchen…" value={search} onChange={(e) => setSearch(e.target.value)} />
         </div>
-        <Segmented size="sm" value={status} onChange={setStatus} options={[{ value: 'active', label: 'Aktiv' }, { value: 'all', label: 'Alle' }]} />
+        <Segmented
+          size="sm"
+          value={status}
+          onChange={setStatus}
+          options={[
+            { value: 'active', label: 'Aktiv' },
+            { value: 'inactive', label: 'Inaktiv', title: 'Kunden ohne laufende Zusammenarbeit' },
+            { value: 'all', label: 'Alle' },
+          ]}
+        />
         <Segmented
           size="sm"
           value={layout}
diff --git a/src/components/reports/CustomerReport.tsx b/src/components/reports/CustomerReport.tsx
index ae9587b..354afc1 100644
--- a/src/components/reports/CustomerReport.tsx
+++ b/src/components/reports/CustomerReport.tsx
@@ -1,5 +1,5 @@
 import React, { useMemo, useState } from 'react';
-import { Badge, BudgetBar, Card, EmptyState, ErrorBox, Spinner, inputClass } from '../ui/controls';
+import { Badge, BudgetBar, Card, EmptyState, ErrorBox, Segmented, Spinner, inputClass } from '../ui/controls';
 import { Icon } from '../ui/Icon';
 import { BILLABLE, CountUp, Legend, NON_BILLABLE, StackedBars } from '../ui/charts';
 import { ReportTable } from './ReportTable';
@@ -17,17 +17,37 @@ export const CustomerReport: React.FC<{ id: number | null }> = ({ id }) => {
   const { navigate } = useRouter();
   const customers = useLoader(() => customersApi.list(), []);
   const report = useLoader(() => (id ? reportsApi.customer(id) : Promise.resolve(null)), [id]);
+  const [status, setStatus] = useState<'active' | 'inactive' | 'all'>('active');
+
+  // Der gewaehlte Kunde bleibt in der Liste, auch wenn der Filter ihn sonst
+  // ausblenden wuerde - sonst springt die Auswahl beim Umschalten weg.
+  const auswahl = (customers.data ?? []).filter(
+    (c) => c.id === id || status === 'all' || (status === 'inactive' ? !c.is_active : c.is_active)
+  );
 
   return (
     <div className="space-y-4">
-      <select className={`${inputClass} !w-auto min-w-[260px] max-w-full`} value={id ?? ''} onChange={(e) => navigate(e.target.value ? `reports/kunde/${e.target.value}` : 'reports/kunde')}>
-        <option value="">Kunde wählen…</option>
-        {(customers.data ?? []).map((c) => (
-          <option key={c.id} value={c.id}>
-            {c.name}
-          </option>
-        ))}
-      </select>
+      <div className="flex flex-wrap items-center gap-2">
+        <select className={`${inputClass} !w-auto min-w-[260px] max-w-full`} value={id ?? ''} onChange={(e) => navigate(e.target.value ? `reports/kunde/${e.target.value}` : 'reports/kunde')}>
+          <option value="">Kunde wählen…</option>
+          {auswahl.map((c) => (
+            <option key={c.id} value={c.id}>
+              {c.name}
+              {c.is_active ? '' : ' (inaktiv)'}
+            </option>
+          ))}
+        </select>
+        <Segmented
+          size="sm"
+          value={status}
+          onChange={setStatus}
+          options={[
+            { value: 'active', label: 'Aktiv' },
+            { value: 'inactive', label: 'Inaktiv', title: 'Kunden ohne laufende Zusammenarbeit' },
+            { value: 'all', label: 'Alle' },
+          ]}
+        />
+      </div>
       {!id ? (
         <EmptyState icon="building" title="Kunde auswählen" text="Alle Projekte eines Kunden mit Budget, Umsatz, Verlauf und Team." />
       ) : report.error ? (
diff --git a/src/components/reports/Reports.tsx b/src/components/reports/Reports.tsx
index 29c825f..d8733f9 100644
--- a/src/components/reports/Reports.tsx
+++ b/src/components/reports/Reports.tsx
@@ -147,11 +147,23 @@ const TimeReport: React.FC = () => {
         )}
         <select className={`${inputClass} !w-auto max-w-[220px]`} value={customerId} onChange={(e) => setCustomerId(e.target.value ? Number(e.target.value) : '')}>
           <option value="">Alle Kunden</option>
-          {customers.map((c) => (
-            <option key={c.id} value={c.id}>
-              {c.name}
-            </option>
-          ))}
+          {/* Stillgelegte Kunden stehen weiter zur Wahl - die Historie bleibt ja. */}
+          <optgroup label="Aktiv">
+            {customers.filter((c) => c.is_active).map((c) => (
+              <option key={c.id} value={c.id}>
+                {c.name}
+              </option>
+            ))}
+          </optgroup>
+          {customers.some((c) => !c.is_active) && (
+            <optgroup label="Inaktiv">
+              {customers.filter((c) => !c.is_active).map((c) => (
+                <option key={c.id} value={c.id}>
+                  {c.name}
+                </option>
+              ))}
+            </optgroup>
+          )}
         </select>
         <select className={`${inputClass} !w-auto`} value={period} onChange={(e) => setPeriod(e.target.value as Period)}>
           <option value="week">Woche</option>