diff --git a/frontend/src/App.svelte b/frontend/src/App.svelte
index c83f3c3..1aa4847 100644
--- a/frontend/src/App.svelte
+++ b/frontend/src/App.svelte
@@ -162,7 +162,13 @@
     }
   }
 
-  function playSound(name) {
+  async function playSound(name) {
+    // Ensure AudioContext is running (may be suspended after inactivity)
+    const ctx = getAudioContext()
+    if (ctx.state === 'suspended') {
+      await ctx.resume()
+    }
+    
     switch (name) {
       case 'warning':
         playBeep(880, 0.15)
diff --git a/frontend/src/components/ParticipantList.svelte b/frontend/src/components/ParticipantList.svelte
index 48f48cf..bc75458 100644
--- a/frontend/src/components/ParticipantList.svelte
+++ b/frontend/src/components/ParticipantList.svelte
@@ -8,10 +8,17 @@
 
   $: allSpeakers = timerState?.allSpeakers || []
   $: currentSpeakerId = timerState?.currentSpeakerId || 0
+  $: currentElapsed = timerState?.speakerElapsed || 0
 
   function handleSkip(speakerId) {
     dispatch('skip', { speakerId })
   }
+
+  function formatTime(seconds) {
+    const mins = Math.floor(seconds / 60)
+    const secs = seconds % 60
+    return `${mins}:${secs.toString().padStart(2, '0')}`
+  }
 </script>
 
 <div class="participant-list">
@@ -23,7 +30,23 @@
         <li class="speaker-item {speaker.status}">
           <span class="order">{speaker.order}</span>
           <span class="name">{speaker.name}</span>
-          <span class="time-limit">{Math.floor(speaker.timeLimit / 60)}:{(speaker.timeLimit % 60).toString().padStart(2, '0')}</span>
+          <span class="time-display">
+            {#if speaker.status === 'done'}
+              <span class="time-spent" class:overtime={speaker.timeSpent > speaker.timeLimit}>
+                {formatTime(speaker.timeSpent)}
+              </span>
+              <span class="time-sep">/</span>
+              <span class="time-limit">{formatTime(speaker.timeLimit)}</span>
+            {:else if speaker.status === 'speaking'}
+              <span class="time-spent" class:overtime={currentElapsed > speaker.timeLimit}>
+                {formatTime(currentElapsed)}
+              </span>
+              <span class="time-sep">/</span>
+              <span class="time-limit">{formatTime(speaker.timeLimit)}</span>
+            {:else}
+              <span class="time-limit">{formatTime(speaker.timeLimit)}</span>
+            {/if}
+          </span>
           {#if speaker.status === 'pending' || speaker.status === 'skipped'}
             <button class="skip-btn" on:click={() => handleSkip(speaker.id)} title="{$t('controls.skip')}">
               ⏭
@@ -129,13 +152,6 @@
     white-space: nowrap;
   }
 
-  .time-limit {
-    font-family: 'SF Mono', 'Menlo', monospace;
-    font-size: 12px;
-    color: #6b7280;
-    flex-shrink: 0;
-  }
-
   .skip-btn {
     margin-left: 8px;
     padding: 4px 8px;
@@ -163,4 +179,29 @@
     text-align: center;
     padding: 24px;
   }
+
+  .time-display {
+    display: flex;
+    align-items: center;
+    gap: 2px;
+    font-family: 'SF Mono', 'Menlo', monospace;
+    font-size: 12px;
+    flex-shrink: 0;
+  }
+
+  .time-spent {
+    color: #4ade80;
+  }
+
+  .time-spent.overtime {
+    color: #ef4444;
+  }
+
+  .time-sep {
+    color: #6b7280;
+  }
+
+  .time-limit {
+    color: #6b7280;
+  }
 </style>
diff --git a/internal/models/types.go b/internal/models/types.go
index 02c346f..b09a216 100644
--- a/internal/models/types.go
+++ b/internal/models/types.go
@@ -33,6 +33,7 @@ type SpeakerInfo struct {
 	ID        uint          `json:"id"`
 	Name      string        `json:"name"`
 	TimeLimit int           `json:"timeLimit"`
+	TimeSpent int           `json:"timeSpent"`
 	Order     int           `json:"order"`
 	Status    SpeakerStatus `json:"status"`
 }
diff --git a/internal/timer/timer.go b/internal/timer/timer.go
index f916b94..726a2b5 100644
--- a/internal/timer/timer.go
+++ b/internal/timer/timer.go
@@ -118,12 +118,14 @@ func (t *Timer) startNextSpeaker(now time.Time) {
 		return
 	}
 
-	// Mark previous speaker as done (only if they were speaking, not skipped)
+	// Mark previous speaker as done and save their time spent
 	if t.currentSpeakerID != 0 {
+		timeSpent := int(now.Sub(t.speakerStartTime).Seconds())
 		for i := range t.allSpeakers {
 			if t.allSpeakers[i].ID == t.currentSpeakerID {
 				if t.allSpeakers[i].Status == models.SpeakerStatusSpeaking {
 					t.allSpeakers[i].Status = models.SpeakerStatusDone
+					t.allSpeakers[i].TimeSpent = timeSpent
 				}
 				break
 			}
@@ -299,9 +301,17 @@ func (t *Timer) Stop() {
 		t.mu.Unlock()
 		return
 	}
-	// Mark current speaker as done before stopping
+	// Mark current speaker as done and save their time spent
 	if t.currentSpeakerID != 0 {
-		t.updateSpeakerStatus(t.currentSpeakerID, models.SpeakerStatusDone)
+		now := time.Now()
+		timeSpent := int(now.Sub(t.speakerStartTime).Seconds())
+		for i := range t.allSpeakers {
+			if t.allSpeakers[i].ID == t.currentSpeakerID {
+				t.allSpeakers[i].Status = models.SpeakerStatusDone
+				t.allSpeakers[i].TimeSpent = timeSpent
+				break
+			}
+		}
 	}
 	t.running = false
 	t.paused = false