diff --git a/apps/web/src/components/time/TimelineSection.tsx b/apps/web/src/components/time/TimelineSection.tsx
index 7fc81a9..a791800 100644
--- a/apps/web/src/components/time/TimelineSection.tsx
+++ b/apps/web/src/components/time/TimelineSection.tsx
@@ -7,6 +7,7 @@ import { Card } from '../ui/Card';
 import { Button } from '../ui/Button';
 import { Modal } from '../ui/Modal';
 import { formatDuration, formatDurationCompact } from '../../lib/format-duration';
+import { usePresenceSeconds } from '../../lib/use-presence-seconds';
 import { TIME_CATEGORIES, type TimeCategory } from '../../lib/time-categories';
 
 const CATEGORY_LABEL: Record<string, string> = Object.fromEntries(
@@ -30,6 +31,10 @@ export function TimelineSection() {
   const todayQuery = trpc.dayEntry.today.useQuery();
   const [manualOpen, setManualOpen] = useState(false);
   const [editing, setEditing] = useState<string | null>(null);
+  const presenceSeconds = usePresenceSeconds(
+    todayQuery.data?.entry?.checkedInAt,
+    todayQuery.data?.entry?.checkedOutAt,
+  );
 
   if (listQuery.isPending) return null;
   // Aufsteigend sortieren: Vormittag oben, Abend unten.
@@ -45,7 +50,13 @@ export function TimelineSection() {
         <div>
           <h2 className="text-lg font-semibold">Zeit heute</h2>
           <p className="text-xs text-[var(--color-ink-muted)]">
-            Gesamt: <span className="font-mono">{formatDurationCompact(totalSeconds)}</span>
+            Getrackt: <span className="font-mono">{formatDurationCompact(totalSeconds)}</span>
+            {presenceSeconds !== null && (
+              <>
+                {' · '}Anwesend:{' '}
+                <span className="font-mono">{formatDurationCompact(presenceSeconds)}</span>
+              </>
+            )}
           </p>
         </div>
         <Button size="sm" variant="secondary" onClick={() => setManualOpen(true)}>
diff --git a/apps/web/src/lib/use-presence-seconds.ts b/apps/web/src/lib/use-presence-seconds.ts
new file mode 100644
index 0000000..1579943
--- /dev/null
+++ b/apps/web/src/lib/use-presence-seconds.ts
@@ -0,0 +1,22 @@
+import { useEffect, useState } from 'react';
+
+/**
+ * Anwesenheits-Sekunden von Lock-in bis Feierabend — bzw. bis jetzt, solange
+ * noch kein Check-Out vorliegt. Reine Anzeige, unabhängig vom Task-Tracking.
+ * Tickt minütlich, solange der Tag noch läuft.
+ */
+export function usePresenceSeconds(
+  checkedInAt: string | Date | null | undefined,
+  checkedOutAt: string | Date | null | undefined,
+): number | null {
+  const running = Boolean(checkedInAt) && !checkedOutAt;
+  const [nowMs, setNowMs] = useState(() => Date.now());
+  useEffect(() => {
+    if (!running) return;
+    const id = setInterval(() => setNowMs(Date.now()), 60_000);
+    return () => clearInterval(id);
+  }, [running]);
+  if (!checkedInAt) return null;
+  const endMs = checkedOutAt ? new Date(checkedOutAt).getTime() : nowMs;
+  return Math.max(0, Math.round((endMs - new Date(checkedInAt).getTime()) / 1000));
+}
diff --git a/apps/web/src/routes/heute.tsx b/apps/web/src/routes/heute.tsx
index 2475f16..5f79cca 100644
--- a/apps/web/src/routes/heute.tsx
+++ b/apps/web/src/routes/heute.tsx
@@ -10,6 +10,7 @@ import { toast } from 'sonner';
 import { X, Plus, RotateCw, BellRing, Play, Clock, Check, LogOut } from 'lucide-react';
 import { TimelineSection, ManualDialog } from '../components/time/TimelineSection';
 import { formatDurationCompact } from '../lib/format-duration';
+import { usePresenceSeconds } from '../lib/use-presence-seconds';
 
 /** Aktuelle Stunde in Europe/Berlin (0–23). */
 function berlinHourNow(): number {
@@ -353,15 +354,8 @@ function CheckInOutBar({
           minute: '2-digit',
         }).format(new Date(d))
       : '—';
-  const duration =
-    checkedInAt && checkedOutAt
-      ? formatDurationCompact(
-          Math.max(
-            0,
-            Math.round((new Date(checkedOutAt).getTime() - new Date(checkedInAt).getTime()) / 1000),
-          ),
-        )
-      : null;
+  // Anwesenheit (Lock-in → Feierabend bzw. jetzt) — reine Anzeige, kein Tracking.
+  const presenceSeconds = usePresenceSeconds(checkedInAt, checkedOutAt);
 
   return (
     <>
@@ -373,7 +367,7 @@ function CheckInOutBar({
           <>
             <span className="text-[var(--color-ink-muted)]">
               · Feierabend <span className="font-mono">{hhmm(checkedOutAt)}</span>
-              {duration && ` · ${duration}`}
+              {presenceSeconds !== null && ` · ${formatDurationCompact(presenceSeconds)} anwesend`}
             </span>
             <Button
               size="sm"
@@ -386,14 +380,22 @@ function CheckInOutBar({
             </Button>
           </>
         ) : (
-          <Button
-            size="sm"
-            variant="secondary"
-            className="ml-auto"
-            onClick={() => setConfirmOpen(true)}
-          >
-            <LogOut size={14} /> Feierabend / Check-Out
-          </Button>
+          <>
+            {presenceSeconds !== null && (
+              <span className="text-[var(--color-ink-muted)]">
+                · anwesend seit{' '}
+                <span className="font-mono">{formatDurationCompact(presenceSeconds)}</span>
+              </span>
+            )}
+            <Button
+              size="sm"
+              variant="secondary"
+              className="ml-auto"
+              onClick={() => setConfirmOpen(true)}
+            >
+              <LogOut size={14} /> Feierabend / Check-Out
+            </Button>
+          </>
         )}
       </div>
       <FeierabendDialog