diff --git a/gui/src/components/provider-workspace/ProviderDetails.tsx b/gui/src/components/provider-workspace/ProviderDetails.tsx
index 155a762ef..c9a14d052 100644
--- a/gui/src/components/provider-workspace/ProviderDetails.tsx
+++ b/gui/src/components/provider-workspace/ProviderDetails.tsx
@@ -269,7 +269,7 @@ export default function ProviderDetails({
           />
         )}
         {tab === "usage" && (
-          <ProviderUsage item={item} usageTotals={usageTotals} quotaReport={quotaReport} modelUsage={modelUsage} />
+          <ProviderUsage item={item} usageTotals={usageTotals} quotaReport={quotaReport} modelUsage={modelUsage} accounts={accounts} />
         )}
         {tab === "accounts" && (
           <ProviderAuthPanel
diff --git a/gui/src/components/provider-workspace/ProviderUsage.tsx b/gui/src/components/provider-workspace/ProviderUsage.tsx
index d697f436a..cebdb9889 100644
--- a/gui/src/components/provider-workspace/ProviderUsage.tsx
+++ b/gui/src/components/provider-workspace/ProviderUsage.tsx
@@ -8,13 +8,14 @@ import QuotaBars from "../QuotaBars";
 import type { WorkspaceItem } from "../../provider-workspace/catalog";
 import { formatRelativeTime, relativeTimeLabelsFromT, formatRequestCount, formatTokenCount, formatCostUsd } from "../../provider-workspace/usage";
 import { accountQuotaFromReport, formatQuotaSourceLabel, type ProviderQuotaReportView } from "../../provider-workspace/report";
-import type { ProviderUsageTotals, ProviderModelUsageRow } from "./types";
+import type { ProviderUsageTotals, ProviderModelUsageRow, OAuthAccountRow } from "./types";
 
-export default function ProviderUsage({ item, usageTotals, quotaReport, modelUsage }: {
+export default function ProviderUsage({ item, usageTotals, quotaReport, modelUsage, accounts }: {
   item: WorkspaceItem;
   usageTotals?: ProviderUsageTotals;
   quotaReport?: ProviderQuotaReportView;
   modelUsage?: ProviderModelUsageRow[];
+  accounts?: OAuthAccountRow[];
 }) {
   const t = useT();
   const { locale } = useI18n();
@@ -22,6 +23,12 @@ export default function ProviderUsage({ item, usageTotals, quotaReport, modelUsa
   const hasUsage = usageTotals?.requests !== undefined;
   const quota = accountQuotaFromReport(quotaReport);
   const [expandedModel, setExpandedModel] = useState<string | null>(null);
+  const [selectedAccountId, setSelectedAccountId] = useState<string>("all");
+
+  const selectedAccount = useMemo(() => {
+    if (!accounts?.length || selectedAccountId === "all") return null;
+    return accounts.find(a => a.id === selectedAccountId) ?? null;
+  }, [accounts, selectedAccountId]);
   void item;
 
   const sortedModels = useMemo(() => {
@@ -45,7 +52,37 @@ export default function ProviderUsage({ item, usageTotals, quotaReport, modelUsa
   return (
     <div className="pws-section">
       <div className="pws-usage-block">
-        <h3 className="pws-section-title">{t("pws.usageLast30d")}</h3>
+        <div style={{ display: "flex", justifyContent: "space-between", alignItems: "center", flexWrap: "wrap", gap: 12 }}>
+          <h3 className="pws-section-title" style={{ margin: 0 }}>{t("pws.usageLast30d")}</h3>
+          {accounts && accounts.length > 0 && (
+            <div style={{ display: "flex", alignItems: "center", gap: 8 }}>
+              <label htmlFor="pws-account-filter" className="muted faint" style={{ fontSize: 13 }}>
+                {t("pws.usageAccountSelector")}:
+              </label>
+              <select
+                id="pws-account-filter"
+                className="select select-sm"
+                value={selectedAccountId}
+                onChange={e => setSelectedAccountId(e.target.value)}
+              >
+                <option value="all">{t("pws.allAccountsCombined")}</option>
+                {accounts.map(acc => (
+                  <option key={acc.id} value={acc.id}>
+                    {acc.email ?? acc.alias ?? acc.id} {acc.active ? `(${t("prov.accountActive")})` : ""}
+                  </option>
+                ))}
+              </select>
+            </div>
+          )}
+        </div>
+        {selectedAccount && (
+          <div style={{ marginTop: 8 }}>
+            <span className="badge badge-primary">
+              {selectedAccount.email ?? selectedAccount.alias ?? selectedAccount.id}
+              {selectedAccount.active ? ` · ${t("prov.accountActive")}` : ""}
+            </span>
+          </div>
+        )}
         {hasUsage ? (
           <>
             <div className="pws-usage-metrics pws-usage-metrics-3" role="group" aria-label={t("pws.usageLast30d")}>
diff --git a/gui/src/i18n/de.ts b/gui/src/i18n/de.ts
index 46d78face..77206ddba 100644
--- a/gui/src/i18n/de.ts
+++ b/gui/src/i18n/de.ts
@@ -1454,6 +1454,12 @@ export const de: Record<TKey, string> = {
  "pws.noModelMatch": "Keine Modelle entsprechen dem Filter.",
   "pws.adapterBaseRequired": "Adapter und Basis-URL sind erforderlich.",
   "pws.addAccount": "Konto hinzufügen",
+  "pws.importJson": "JSON importieren",
+  "pws.importJsonCockpit": "JSON importieren (Cockpit)",
+  "pws.importResultSummary": "{imported} Konto/en importiert, {failed} fehlgeschlagen.",
+  "pws.usageAccountSelector": "Kontonutzungsfilter",
+  "pws.allAccountsCombined": "Alle Konten (Kombiniert)",
+  "prov.expiresAt": "Läuft ab: {date}",
   "pws.addKey": "API-Schlüssel hinzufügen",
   "pws.apiKeys": "API-Schlüssel",
   "pws.authMode": "Auth-Modus",
diff --git a/gui/src/i18n/en.ts b/gui/src/i18n/en.ts
index 8389a237a..22872fe3c 100644
--- a/gui/src/i18n/en.ts
+++ b/gui/src/i18n/en.ts
@@ -1005,6 +1005,12 @@ export const en = {
  "pws.noModelMatch": "No models match the filter.",
   "pws.adapterBaseRequired": "Adapter and base URL are required.",
   "pws.addAccount": "Add account",
+  "pws.importJson": "Import JSON",
+  "pws.importJsonCockpit": "Import JSON (Cockpit)",
+  "pws.importResultSummary": "Imported {imported} account(s), {failed} failed.",
+  "pws.usageAccountSelector": "Account Usage Filter",
+  "pws.allAccountsCombined": "All Accounts (Combined)",
+  "prov.expiresAt": "Expires: {date}",
   "pws.addKey": "Add API key",
   "pws.apiKeys": "API Keys",
   "pws.authMode": "Auth mode",
diff --git a/gui/src/i18n/ja.ts b/gui/src/i18n/ja.ts
index 77aaa0dd8..151f397d4 100644
--- a/gui/src/i18n/ja.ts
+++ b/gui/src/i18n/ja.ts
@@ -953,6 +953,12 @@ export const ja: Record<TKey, string> = {
   "pws.noModelMatch": "フィルタに一致するモデルがありません。",
   "pws.adapterBaseRequired": "アダプターとベース URL は必須です。",
   "pws.addAccount": "アカウントを追加",
+  "pws.importJson": "JSON をインポート",
+  "pws.importJsonCockpit": "JSON をインポート (Cockpit)",
+  "pws.importResultSummary": "{imported} 件のアカウントをインポートしました（失敗: {failed} 件）。",
+  "pws.usageAccountSelector": "アカウント利用フィルター",
+  "pws.allAccountsCombined": "全アカウント（合計）",
+  "prov.expiresAt": "有効期限: {date}",
   "pws.addKey": "API キーを追加",
   "pws.apiKeys": "API キー",
   "pws.authMode": "認証モード",
diff --git a/gui/src/i18n/ko.ts b/gui/src/i18n/ko.ts
index 93e03755e..0c05bc4a4 100644
--- a/gui/src/i18n/ko.ts
+++ b/gui/src/i18n/ko.ts
@@ -1481,6 +1481,12 @@ export const ko: Record<TKey, string> = {
  "pws.noModelMatch": "필터와 일치하는 모델이 없습니다.",
   "pws.adapterBaseRequired": "어댑터와 기본 URL은 필수입니다.",
   "pws.addAccount": "계정 추가",
+  "pws.importJson": "JSON 가져오기",
+  "pws.importJsonCockpit": "JSON 가져오기 (Cockpit)",
+  "pws.importResultSummary": "{imported}개 계정을 가져왔습니다 ({failed}개 실패).",
+  "pws.usageAccountSelector": "계정 사용 필터",
+  "pws.allAccountsCombined": "모든 계정 (합계)",
+  "prov.expiresAt": "만료일: {date}",
   "pws.addKey": "API 키 추가",
   "pws.apiKeys": "API 키",
   "pws.authMode": "인증 방식",
diff --git a/gui/src/i18n/ru.ts b/gui/src/i18n/ru.ts
index 48e9149b6..6d08101b2 100644
--- a/gui/src/i18n/ru.ts
+++ b/gui/src/i18n/ru.ts
@@ -995,6 +995,12 @@ export const ru: Record<TKey, string> = {
   "pws.noModelMatch": "Нет моделей, соответствующих фильтру.",
   "pws.adapterBaseRequired": "Укажите адаптер и базовый URL.",
   "pws.addAccount": "Добавить аккаунт",
+  "pws.importJson": "Импортировать JSON",
+  "pws.importJsonCockpit": "Импорт JSON (Cockpit)",
+  "pws.importResultSummary": "Импортировано аккаунтов: {imported}, ошибок: {failed}.",
+  "pws.usageAccountSelector": "Фильтр использования по аккаунту",
+  "pws.allAccountsCombined": "Все аккаунты (суммарно)",
+  "prov.expiresAt": "Истекает: {date}",
   "pws.addKey": "Добавить API-ключ",
   "pws.apiKeys": "API-ключи",
   "pws.authMode": "Режим аутентификации",
diff --git a/gui/src/i18n/zh.ts b/gui/src/i18n/zh.ts
index 15e6053b3..11b1263cb 100644
--- a/gui/src/i18n/zh.ts
+++ b/gui/src/i18n/zh.ts
@@ -1474,6 +1474,12 @@ export const zh: Record<TKey, string> = {
  "pws.noModelMatch": "没有匹配筛选的模型。",
   "pws.adapterBaseRequired": "适配器和基本 URL 为必填项。",
   "pws.addAccount": "添加账户",
+  "pws.importJson": "导入 JSON",
+  "pws.importJsonCockpit": "导入 JSON (Cockpit)",
+  "pws.importResultSummary": "已导入 {imported} 个账户，{failed} 个失败。",
+  "pws.usageAccountSelector": "账户使用筛选",
+  "pws.allAccountsCombined": "所有账户（汇总）",
+  "prov.expiresAt": "到期时间: {date}",
   "pws.addKey": "添加 API 密钥",
   "pws.apiKeys": "API 密钥",
   "pws.authMode": "认证方式",