diff --git a/src/agents/subagent-registry-helpers.test.ts b/src/agents/subagent-registry-helpers.test.ts
new file mode 100644
index 00000000000..25512b5a887
--- /dev/null
+++ b/src/agents/subagent-registry-helpers.test.ts
@@ -0,0 +1,54 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { reconcileOrphanedRun } from "./subagent-registry-helpers.js";
+import type { SubagentRunRecord } from "./subagent-registry.types.js";
+
+function createRunEntry(overrides: Partial<SubagentRunRecord> = {}): SubagentRunRecord {
+  return {
+    runId: "run-1",
+    childSessionKey: "agent:main:subagent:child",
+    requesterSessionKey: "agent:main:main",
+    requesterDisplayKey: "main",
+    task: "finish the task",
+    cleanup: "keep",
+    retainAttachmentsOnKeep: true,
+    createdAt: 500,
+    startedAt: 1_000,
+    ...overrides,
+  };
+}
+
+describe("reconcileOrphanedRun", () => {
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("preserves timing on orphaned error outcomes", () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(4_000);
+    const entry = createRunEntry();
+    const runs = new Map([[entry.runId, entry]]);
+    const resumedRuns = new Set([entry.runId]);
+
+    expect(
+      reconcileOrphanedRun({
+        runId: entry.runId,
+        entry,
+        reason: "missing-session-id",
+        source: "resume",
+        runs,
+        resumedRuns,
+      }),
+    ).toBe(true);
+
+    expect(entry.endedAt).toBe(4_000);
+    expect(entry.outcome).toEqual({
+      status: "error",
+      error: "orphaned subagent run (missing-session-id)",
+      startedAt: 1_000,
+      endedAt: 4_000,
+      elapsedMs: 3_000,
+    });
+    expect(runs.has(entry.runId)).toBe(false);
+    expect(resumedRuns.has(entry.runId)).toBe(false);
+  });
+});
diff --git a/src/agents/subagent-registry-helpers.ts b/src/agents/subagent-registry-helpers.ts
index cd45e87c682..71aa8484749 100644
--- a/src/agents/subagent-registry-helpers.ts
+++ b/src/agents/subagent-registry-helpers.ts
@@ -11,9 +11,9 @@ import {
 import type { OpenClawConfig } from "../config/types.openclaw.js";
 import { defaultRuntime } from "../runtime.js";
 import { normalizeLowercaseStringOrEmpty } from "../shared/string-coerce.js";
-import { type SubagentRunOutcome } from "./subagent-announce-output.js";
+import { withSubagentOutcomeTiming } from "./subagent-announce-output.js";
 import { SUBAGENT_ENDED_REASON_ERROR } from "./subagent-lifecycle-events.js";
-import { runOutcomesEqual } from "./subagent-registry-completion.js";
+import { shouldUpdateRunOutcome } from "./subagent-registry-completion.js";
 import type { SubagentRunRecord } from "./subagent-registry.types.js";
 import {
   getSubagentSessionRuntimeMs,
@@ -219,11 +219,17 @@ export function reconcileOrphanedRun(params: {
     params.entry.endedAt = now;
     changed = true;
   }
-  const orphanOutcome: SubagentRunOutcome = {
-    status: "error",
-    error: `orphaned subagent run (${params.reason})`,
-  };
-  if (!runOutcomesEqual(params.entry.outcome, orphanOutcome)) {
+  const orphanOutcome = withSubagentOutcomeTiming(
+    {
+      status: "error",
+      error: `orphaned subagent run (${params.reason})`,
+    },
+    {
+      startedAt: params.entry.startedAt,
+      endedAt: params.entry.endedAt,
+    },
+  );
+  if (shouldUpdateRunOutcome(params.entry.outcome, orphanOutcome)) {
     params.entry.outcome = orphanOutcome;
     changed = true;
   }
diff --git a/src/agents/subagent-registry-run-manager.ts b/src/agents/subagent-registry-run-manager.ts
index 1e1c0e83773..a5e2d605cb2 100644
--- a/src/agents/subagent-registry-run-manager.ts
+++ b/src/agents/subagent-registry-run-manager.ts
@@ -7,7 +7,7 @@ import { createRunningTaskRun } from "../tasks/detached-task-runtime.js";
 import { type DeliveryContext, normalizeDeliveryContext } from "../utils/delivery-context.js";
 import { waitForAgentRun } from "./run-wait.js";
 import type { ensureRuntimePluginsLoaded as ensureRuntimePluginsLoadedFn } from "./runtime-plugins.js";
-import type { SubagentRunOutcome } from "./subagent-announce-output.js";
+import { type SubagentRunOutcome, withSubagentOutcomeTiming } from "./subagent-announce-output.js";
 import {
   SUBAGENT_ENDED_OUTCOME_KILLED,
   SUBAGENT_ENDED_REASON_COMPLETE,
@@ -15,7 +15,10 @@ import {
   SUBAGENT_ENDED_REASON_KILLED,
   type SubagentLifecycleEndedReason,
 } from "./subagent-lifecycle-events.js";
-import { emitSubagentEndedHookOnce, runOutcomesEqual } from "./subagent-registry-completion.js";
+import {
+  emitSubagentEndedHookOnce,
+  shouldUpdateRunOutcome,
+} from "./subagent-registry-completion.js";
 import {
   getSubagentSessionRuntimeMs,
   getSubagentSessionStartedAt,
@@ -127,13 +130,17 @@ export function createSubagentRunManager(params: {
         mutated = true;
       }
       const waitError = typeof wait.error === "string" ? wait.error : undefined;
-      const outcome: SubagentRunOutcome =
+      const baseOutcome: SubagentRunOutcome =
         wait.status === "error"
           ? { status: "error", error: waitError }
           : wait.status === "timeout"
             ? { status: "timeout" }
             : { status: "ok" };
-      if (!runOutcomesEqual(entry.outcome, outcome)) {
+      const outcome = withSubagentOutcomeTiming(baseOutcome, {
+        startedAt: entry.startedAt,
+        endedAt: entry.endedAt,
+      });
+      if (shouldUpdateRunOutcome(entry.outcome, outcome)) {
         entry.outcome = outcome;
         mutated = true;
       }
@@ -417,7 +424,13 @@ export function createSubagentRunManager(params: {
         continue;
       }
       entry.endedAt = now;
-      entry.outcome = { status: "error", error: reason };
+      entry.outcome = withSubagentOutcomeTiming(
+        { status: "error", error: reason },
+        {
+          startedAt: entry.startedAt,
+          endedAt: now,
+        },
+      );
       entry.endedReason = SUBAGENT_ENDED_REASON_KILLED;
       entry.cleanupHandled = true;
       entry.cleanupCompletedAt = now;
diff --git a/src/agents/subagent-registry.test.ts b/src/agents/subagent-registry.test.ts
index 8c872cd3b2b..ba62216c012 100644
--- a/src/agents/subagent-registry.test.ts
+++ b/src/agents/subagent-registry.test.ts
@@ -402,6 +402,17 @@ describe("subagent registry seam flow", () => {
     });
 
     expect(updated).toBe(1);
+    const killedRun = mod
+      .listSubagentRunsForRequester("agent:main:main")
+      .find((entry) => entry.runId === "run-killed-init");
+    const killedAt = Date.parse("2026-03-24T12:00:00Z");
+    expect(killedRun?.outcome).toEqual({
+      status: "error",
+      error: "manual kill",
+      startedAt: killedAt,
+      endedAt: killedAt,
+      elapsedMs: 0,
+    });
     await waitForFast(() => {
       expect(mocks.ensureRuntimePluginsLoaded).toHaveBeenCalledWith({
         config: {