diff --git a/backend/internal/service/account_scheduling_threshold_eval.go b/backend/internal/service/account_scheduling_threshold_eval.go
index 4812fceca..b8a9dae80 100644
--- a/backend/internal/service/account_scheduling_threshold_eval.go
+++ b/backend/internal/service/account_scheduling_threshold_eval.go
@@ -53,7 +53,7 @@ func EvaluateAccountSchedulingThreshold(account *Account, thresholds map[string]
 	var winner *accountSchedulingThresholdCandidate
 	switch decision.Platform {
 	case PlatformOpenAI:
-		winner = pickLatestResetSchedulingCandidate(openAIThresholdCandidates(account), threshold, now)
+		winner = pickLatestResetSchedulingCandidate(openAIThresholdCandidates(account, now), threshold, now)
 	case PlatformAnthropic:
 		winner = pickLatestResetSchedulingCandidate(anthropicThresholdCandidates(account), threshold, now)
 	case PlatformGrok:
@@ -149,7 +149,7 @@ func lookupAccountSchedulingThreshold(thresholds map[string]int, platform string
 	return value, ok
 }
 
-func openAIThresholdCandidates(account *Account) []*accountSchedulingThresholdCandidate {
+func openAIThresholdCandidates(account *Account, now time.Time) []*accountSchedulingThresholdCandidate {
 	if account == nil {
 		return nil
 	}
@@ -157,8 +157,8 @@ func openAIThresholdCandidates(account *Account) []*accountSchedulingThresholdCa
 		return nil
 	}
 	return []*accountSchedulingThresholdCandidate{
-		openAIThresholdCandidate(account.Extra, "5h"),
-		openAIThresholdCandidate(account.Extra, "7d"),
+		openAIThresholdCandidate(account.Extra, "5h", now),
+		openAIThresholdCandidate(account.Extra, "7d", now),
 	}
 }
 
@@ -219,7 +219,7 @@ func firstStringValue(values map[string]any, keys ...string) string {
 	return ""
 }
 
-func openAIThresholdCandidate(extra map[string]any, window string) *accountSchedulingThresholdCandidate {
+func openAIThresholdCandidate(extra map[string]any, window string, now time.Time) *accountSchedulingThresholdCandidate {
 	if len(extra) == 0 {
 		return nil
 	}
@@ -243,6 +243,9 @@ func openAIThresholdCandidate(extra map[string]any, window string) *accountSched
 	if !ok {
 		return nil
 	}
+	if openAIQuotaWindowReset(extra, window, now) || openAICodexSnapshotStaleForPause(extra, now) {
+		return nil
+	}
 	return &accountSchedulingThresholdCandidate{
 		window:      window,
 		usedPercent: schedulingPercentValue(usedPercent),
diff --git a/backend/internal/service/account_scheduling_threshold_eval_test.go b/backend/internal/service/account_scheduling_threshold_eval_test.go
index 74d3e9648..653543175 100644
--- a/backend/internal/service/account_scheduling_threshold_eval_test.go
+++ b/backend/internal/service/account_scheduling_threshold_eval_test.go
@@ -109,7 +109,7 @@ func TestEvaluateAccountSchedulingThreshold_OpenAIPreservesPercentageSemantics(t
 		},
 	}
 
-	candidate := openAIThresholdCandidate(openAIAccount.Extra, "5h")
+	candidate := openAIThresholdCandidate(openAIAccount.Extra, "5h", now)
 	require.NotNil(t, candidate)
 	require.Equal(t, 1.0, candidate.usedPercent)
 
@@ -126,6 +126,88 @@ func TestEvaluateAccountSchedulingThreshold_OpenAIPreservesPercentageSemantics(t
 	require.Equal(t, 91.0, openAIDecision.UsedPercent)
 }
 
+func TestEvaluateAccountSchedulingThreshold_OpenAISkipsStaleSnapshot(t *testing.T) {
+	t.Parallel()
+
+	now := time.Date(2026, 6, 3, 12, 0, 0, 0, time.UTC)
+	account := &Account{
+		Platform: PlatformOpenAI,
+		Extra: map[string]any{
+			"codex_usage_updated_at": now.Add(-2 * time.Hour).Format(time.RFC3339),
+			"codex_5h_used_percent":  100.0,
+			"codex_5h_reset_at":      now.Add(3 * time.Hour).Format(time.RFC3339),
+		},
+	}
+
+	decision := EvaluateAccountSchedulingThreshold(account, map[string]int{PlatformOpenAI: 90}, now)
+
+	require.False(t, decision.ShouldPause)
+}
+
+func TestEvaluateAccountSchedulingThreshold_OpenAISkipsResetWindow(t *testing.T) {
+	t.Parallel()
+
+	now := time.Date(2026, 6, 3, 12, 0, 0, 0, time.UTC)
+	account := &Account{
+		Platform: PlatformOpenAI,
+		Extra: map[string]any{
+			"codex_usage_updated_at": now.Add(-time.Minute).Format(time.RFC3339),
+			"codex_5h_used_percent":  100.0,
+			"codex_5h_reset_at":      now.Add(-time.Second).Format(time.RFC3339),
+		},
+	}
+
+	decision := EvaluateAccountSchedulingThreshold(account, map[string]int{PlatformOpenAI: 90}, now)
+
+	require.False(t, decision.ShouldPause)
+}
+
+func TestEvaluateAccountSchedulingThreshold_OpenAIPausesFreshExhaustedSnapshot(t *testing.T) {
+	t.Parallel()
+
+	now := time.Date(2026, 6, 3, 12, 0, 0, 0, time.UTC)
+	resetAt := now.Add(3 * time.Hour)
+	account := &Account{
+		Platform: PlatformOpenAI,
+		Extra: map[string]any{
+			"codex_usage_updated_at": now.Add(-time.Minute).Format(time.RFC3339),
+			"codex_5h_used_percent":  100.0,
+			"codex_5h_reset_at":      resetAt.Format(time.RFC3339),
+		},
+	}
+
+	decision := EvaluateAccountSchedulingThreshold(account, map[string]int{PlatformOpenAI: 90}, now)
+
+	require.True(t, decision.ShouldPause)
+	require.Equal(t, "5h", decision.Window)
+	require.Equal(t, 100.0, decision.UsedPercent)
+	require.NotNil(t, decision.Until)
+	require.True(t, resetAt.Equal(*decision.Until))
+}
+
+func TestEvaluateAccountSchedulingThreshold_OpenAIPausesFreshExhaustedSevenDayWindow(t *testing.T) {
+	t.Parallel()
+
+	now := time.Date(2026, 6, 3, 12, 0, 0, 0, time.UTC)
+	resetAt := now.Add(5 * 24 * time.Hour)
+	account := &Account{
+		Platform: PlatformOpenAI,
+		Extra: map[string]any{
+			"codex_usage_updated_at": now.Add(-time.Minute).Format(time.RFC3339),
+			"codex_7d_used_percent":  95.0,
+			"codex_7d_reset_at":      resetAt.Format(time.RFC3339),
+		},
+	}
+
+	decision := EvaluateAccountSchedulingThreshold(account, map[string]int{PlatformOpenAI: 90}, now)
+
+	require.True(t, decision.ShouldPause)
+	require.Equal(t, "7d", decision.Window)
+	require.Equal(t, 95.0, decision.UsedPercent)
+	require.NotNil(t, decision.Until)
+	require.True(t, resetAt.Equal(*decision.Until))
+}
+
 func TestEvaluateAccountSchedulingThreshold_AnthropicPreservesFractionalUtilizationSemantics(t *testing.T) {
 	t.Parallel()