diff --git a/apps/api/src/routers/time.ts b/apps/api/src/routers/time.ts
index e37a14a..2818f59 100644
--- a/apps/api/src/routers/time.ts
+++ b/apps/api/src/routers/time.ts
@@ -420,4 +420,38 @@ export const timeRouter = router({
 
       return { date, lanes };
     }),
+
+  /**
+   * Getrackte Zeit auf ein Projekt (time_entry mit bezugKind='project'):
+   * Gesamtsumme + Aufschlüsselung pro Person. bezugId wurde bislang erfasst,
+   * aber nirgends ausgewertet — das speist die „Getrackte Zeit"-Sektion im
+   * Projekt-Detail.
+   */
+  byProject: protectedProcedure
+    .input(z.object({ projectId: z.string().uuid() }))
+    .query(async ({ ctx, input }) => {
+      const rows = await ctx.db
+        .select({
+          userId: timeEntry.userId,
+          seconds: sql<number>`COALESCE(SUM(${timeEntry.durationSeconds}), 0)`,
+        })
+        .from(timeEntry)
+        .where(and(eq(timeEntry.bezugKind, 'project'), eq(timeEntry.bezugId, input.projectId)))
+        .groupBy(timeEntry.userId);
+
+      const userRows = await ctx.db.select({ id: user.id, name: user.name }).from(user);
+      const nameById = new Map(userRows.map((u) => [u.id, u.name]));
+
+      const perUser = rows
+        .map((r) => ({
+          userId: r.userId,
+          name: nameById.get(r.userId) ?? '—',
+          seconds: Number(r.seconds),
+        }))
+        .filter((r) => r.seconds > 0)
+        .sort((a, b) => b.seconds - a.seconds);
+      const totalSeconds = perUser.reduce((sum, r) => sum + r.seconds, 0);
+
+      return { totalSeconds, perUser };
+    }),
 });
diff --git a/apps/web/src/routes/projekt.tsx b/apps/web/src/routes/projekt.tsx
index 33e641e..6fc5e66 100644
--- a/apps/web/src/routes/projekt.tsx
+++ b/apps/web/src/routes/projekt.tsx
@@ -12,6 +12,7 @@ import { Modal } from '../components/ui/Modal';
 import { useConfirm } from '../components/ui/ConfirmProvider';
 import { useCurrentUser } from '../hooks/useCurrentUser';
 import { voice } from '../lib/voice';
+import { formatDurationCompact } from '../lib/format-duration';
 import { toast } from 'sonner';
 import { clsx } from 'clsx';
 import { LEAD_STATUS_META, type LeadStatus } from '../lib/lead-meta';
@@ -191,6 +192,8 @@ export function ProjektRoute() {
 
       <MilestonesSection projectId={p.id} milestones={milestones} deadline={p.deadline} />
 
+      <ZeitSection projectId={p.id} />
+
       {p.dodText && (
         <Card.Root>
           <Card.Header>
@@ -584,6 +587,37 @@ function Zieldreieck({ flex }: { flex: ZieldreieckFlex | null }) {
   );
 }
 
+// --- Getrackte Zeit ---------------------------------------------------------
+function ZeitSection({ projectId }: { projectId: string }) {
+  const q = trpc.time.byProject.useQuery({ projectId });
+  if (!q.data || q.data.totalSeconds === 0) return null;
+  return (
+    <Card.Root>
+      <Card.Header>
+        <h2 className="text-lg font-semibold">Getrackte Zeit</h2>
+      </Card.Header>
+      <Card.Body className="space-y-2">
+        <p className="text-sm">
+          Gesamt:{' '}
+          <span className="font-mono font-semibold">
+            {formatDurationCompact(q.data.totalSeconds)}
+          </span>
+        </p>
+        <ul className="space-y-1 text-sm">
+          {q.data.perUser.map((u) => (
+            <li key={u.userId} className="flex justify-between gap-2">
+              <span className="truncate">{u.name}</span>
+              <span className="shrink-0 font-mono text-[var(--color-ink-muted)]">
+                {formatDurationCompact(u.seconds)}
+              </span>
+            </li>
+          ))}
+        </ul>
+      </Card.Body>
+    </Card.Root>
+  );
+}
+
 // --- Phasen-Stepper + Gate-Review -------------------------------------------
 function PhaseSection({ projectId, phase }: { projectId: string; phase: ProjectPhase }) {
   const utils = trpc.useUtils();