diff --git a/packages/core/src/store.ts b/packages/core/src/store.ts
index de6178b9be..93dbe4c770 100644
--- a/packages/core/src/store.ts
+++ b/packages/core/src/store.ts
@@ -2331,6 +2331,7 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
       validatorModelId: entry.validatorModelId,
       planningModelProvider: entry.planningModelProvider,
       planningModelId: entry.planningModelId,
+      tokenUsage: entry.tokenUsage,
       breakIntoSubtasks: entry.breakIntoSubtasks,
       noCommitsExpected: entry.noCommitsExpected,
       branchContext: entry.branchContext,
@@ -2470,6 +2471,7 @@ export class TaskStore extends EventEmitter<TaskStoreEvents> {
       validatorModelId: task.validatorModelId,
       planningModelProvider: task.planningModelProvider,
       planningModelId: task.planningModelId,
+      tokenUsage: task.tokenUsage,
       breakIntoSubtasks: task.breakIntoSubtasks,
       noCommitsExpected: task.noCommitsExpected,
       baseBranch: task.baseBranch,
@@ -14919,6 +14921,7 @@ ${TASK_UPSERT_SQL_ASSIGNMENTS}
       validatorModelId: entry.validatorModelId,
       planningModelProvider: entry.planningModelProvider,
       planningModelId: entry.planningModelId,
+      tokenUsage: entry.tokenUsage,
       breakIntoSubtasks: entry.breakIntoSubtasks,
       noCommitsExpected: entry.noCommitsExpected,
       modifiedFiles: entry.modifiedFiles,
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
index 6634cb35a6..d91473b24c 100644
--- a/packages/core/src/types.ts
+++ b/packages/core/src/types.ts
@@ -4955,6 +4955,8 @@ export interface ArchivedTaskEntry {
   /** Optional: planning model override for triage agent */
   planningModelProvider?: string;
   planningModelId?: string;
+  /** Per-task token/cost accounting (input/output/cache) preserved across archival. */
+  tokenUsage?: TaskTokenUsage;
   /** Optional: other metadata to preserve */
   breakIntoSubtasks?: boolean;
   noCommitsExpected?: boolean;