diff --git a/apps/api/src/routers/time.ts b/apps/api/src/routers/time.ts
index 400fe55..10efbaf 100644
--- a/apps/api/src/routers/time.ts
+++ b/apps/api/src/routers/time.ts
@@ -8,6 +8,31 @@ import { todayIso } from '../lib/werktag.js';
 
 const idInput = z.object({ id: z.string().uuid() });
 
+/**
+ * Wall-Clock-Sekunden: Vereinigung überlappender Zeitintervalle. Parallel
+ * laufende Einträge (mehrere Tasks gleichzeitig) zählen nur einmal — damit
+ * „Gesamt heute" die tatsächlich anwesende Zeit zeigt, nicht die Summe.
+ */
+function unionSeconds(intervals: Array<readonly [number, number]>): number {
+  const valid = intervals.filter(([s, e]) => e > s).sort((a, b) => a[0] - b[0]);
+  if (valid.length === 0) return 0;
+  let total = 0;
+  let curStart = valid[0]![0];
+  let curEnd = valid[0]![1];
+  for (let i = 1; i < valid.length; i++) {
+    const [s, e] = valid[i]!;
+    if (s <= curEnd) {
+      if (e > curEnd) curEnd = e;
+    } else {
+      total += curEnd - curStart;
+      curStart = s;
+      curEnd = e;
+    }
+  }
+  total += curEnd - curStart;
+  return Math.round(total / 1000);
+}
+
 async function stopCurrent(
   tx: import('@cockpit/db').Db,
   userId: string,
@@ -117,12 +142,19 @@ export const timeRouter = router({
         ),
       )
       .orderBy(desc(timeEntry.startedAt));
-    const totalSeconds = rows.reduce((acc, r) => {
-      if (r.endedAt && r.durationSeconds) return acc + r.durationSeconds;
-      if (!r.endedAt) return acc + Math.round((Date.now() - r.startedAt.getTime()) / 1000);
-      return acc;
+    const now = Date.now();
+    // „Gesamt" = Wall-Clock (überlappende Tasks zählen einmal).
+    const totalSeconds = unionSeconds(
+      rows.map((r) => [r.startedAt.getTime(), r.endedAt ? r.endedAt.getTime() : now] as const),
+    );
+    // „getrackt" = Summe aller Task-Zeiten (kann bei parallelem Tracken größer sein).
+    const trackedSeconds = rows.reduce((acc, r) => {
+      if (r.endedAt) {
+        return acc + (r.durationSeconds ?? Math.round((r.endedAt.getTime() - r.startedAt.getTime()) / 1000));
+      }
+      return acc + Math.round((now - r.startedAt.getTime()) / 1000);
     }, 0);
-    return { entries: rows, totalSeconds };
+    return { entries: rows, totalSeconds, trackedSeconds };
   }),
 
   /**
@@ -244,9 +276,10 @@ export const timeRouter = router({
     };
     type Bucket = {
       userId: string;
-      totalSeconds: number;
+      trackedSeconds: number; // Summe aller Task-Zeiten (Parallel-Tracking)
       byCategory: Record<string, number>;
       active: Active | null;
+      intervals: Array<readonly [number, number]>;
     };
 
     const now = Date.now();
@@ -255,16 +288,18 @@ export const timeRouter = router({
     for (const r of rows) {
       const bucket: Bucket = perUser.get(r.userId) ?? {
         userId: r.userId,
-        totalSeconds: 0,
+        trackedSeconds: 0,
         byCategory: {},
         active: null,
+        intervals: [],
       };
       const duration = r.endedAt
         ? (r.durationSeconds ??
             Math.round((r.endedAt.getTime() - r.startedAt.getTime()) / 1000))
         : Math.round((now - r.startedAt.getTime()) / 1000);
-      bucket.totalSeconds += duration;
+      bucket.trackedSeconds += duration;
       bucket.byCategory[r.category] = (bucket.byCategory[r.category] ?? 0) + duration;
+      bucket.intervals.push([r.startedAt.getTime(), r.endedAt ? r.endedAt.getTime() : now]);
       if (!r.endedAt) {
         bucket.active = {
           startedAt: r.startedAt.toISOString(),
@@ -277,6 +312,13 @@ export const timeRouter = router({
       perUser.set(r.userId, bucket);
     }
 
-    return Array.from(perUser.values());
+    // „Gesamt" pro Person = Wall-Clock (Vereinigung der Intervalle).
+    return Array.from(perUser.values()).map((b) => ({
+      userId: b.userId,
+      totalSeconds: unionSeconds(b.intervals),
+      trackedSeconds: b.trackedSeconds,
+      byCategory: b.byCategory,
+      active: b.active,
+    }));
   }),
 });
diff --git a/apps/web/src/components/time/TeamTimeSection.tsx b/apps/web/src/components/time/TeamTimeSection.tsx
index 53aeb58..433611c 100644
--- a/apps/web/src/components/time/TeamTimeSection.tsx
+++ b/apps/web/src/components/time/TeamTimeSection.tsx
@@ -79,13 +79,22 @@ export function TeamTimeSection() {
                     <p className="text-xs text-[var(--color-ink-muted)]">
                       Gesamt:{' '}
                       <span className="font-mono">{formatDurationCompact(it.totalSeconds)}</span>
+                      {it.trackedSeconds > it.totalSeconds + 60 && (
+                        <span
+                          className="text-[var(--color-ink-faint)]"
+                          title="Über parallele Aufgaben getrackte Summe (zählt überlappende Zeit mehrfach)."
+                        >
+                          {' · getrackt '}
+                          <span className="font-mono">{formatDurationCompact(it.trackedSeconds)}</span>
+                        </span>
+                      )}
                     </p>
                   </div>
                 </div>
 
                 {it.active ? <ActiveLine active={it.active} /> : <IdleLine />}
 
-                <Breakdown byCategory={it.byCategory} total={it.totalSeconds} />
+                <Breakdown byCategory={it.byCategory} total={it.trackedSeconds} />
               </Card.Body>
             </Card.Root>
           ))}