diff --git a/devfront/src/features/audit/AuditLogsPage.test.tsx b/devfront/src/features/audit/AuditLogsPage.test.tsx
index a8b9f9db..284094d2 100644
--- a/devfront/src/features/audit/AuditLogsPage.test.tsx
+++ b/devfront/src/features/audit/AuditLogsPage.test.tsx
@@ -174,6 +174,22 @@ describe("AuditLogsPage", () => {
     expect(navigateMock).toHaveBeenCalledWith("/developer-requests");
   });
 
+  it("shows a tenant-required notice when tenant context is missing", async () => {
+    gateState = {
+      hasDeveloperAccess: false,
+      isDeveloperRequestPending: false,
+      canRequestDeveloperAccess: false,
+      isLoadingDeveloperAccessGate: false,
+      isTenantContextMissing: true,
+    };
+
+    const container = await renderPage();
+    expect(container.textContent).toContain(
+      "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+    );
+    expect(container.textContent).not.toContain("개발자 권한 신청");
+  });
+
   it("exports the fetched logs as CSV", async () => {
     const createObjectURL = vi
       .spyOn(URL, "createObjectURL")
diff --git a/devfront/src/features/audit/AuditLogsPage.tsx b/devfront/src/features/audit/AuditLogsPage.tsx
index f7d939bb..2d665ff5 100644
--- a/devfront/src/features/audit/AuditLogsPage.tsx
+++ b/devfront/src/features/audit/AuditLogsPage.tsx
@@ -97,6 +97,7 @@ function AuditLogsPage() {
     isDeveloperRequestPending,
     canRequestDeveloperAccess,
     isLoadingDeveloperAccessGate,
+    isTenantContextMissing,
   } = useDeveloperAccessGate({
     hasAccessToken,
     profileRole,
@@ -142,6 +143,24 @@ function AuditLogsPage() {
   }
 
   if (!hasDeveloperAccess) {
+    const deniedMessage = isTenantContextMissing
+      ? t(
+          "msg.dev.request.tenant_required",
+          "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+        )
+      : t(
+          "msg.dev.audit.access_denied",
+          "감사 로그는 개발자 권한이 있어야 볼 수 있습니다.",
+        );
+    const deniedDetailMessage = isTenantContextMissing
+      ? t(
+          "msg.dev.request.tenant_required_detail",
+          "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다.",
+        )
+      : t(
+          "msg.dev.audit.access_denied_detail",
+          "개발자 권한 신청 페이지에서 신청을 등록한 뒤 승인을 받아주세요.",
+        );
     return (
       <DeveloperAccessRequestCard
         title={t("ui.common.audit.title", "Audit Logs")}
@@ -151,18 +170,12 @@ function AuditLogsPage() {
           "msg.dev.dashboard.access_pending",
           "개발자 권한 신청을 검토 중입니다.",
         )}
-        deniedMessage={t(
-          "msg.dev.audit.access_denied",
-          "감사 로그는 개발자 권한이 있어야 볼 수 있습니다.",
-        )}
+        deniedMessage={deniedMessage}
         pendingDetailMessage={t(
           "msg.dev.dashboard.access_pending_detail",
           "super admin이 승인하면 개요와 개발자 기능을 사용할 수 있습니다.",
         )}
-        deniedDetailMessage={t(
-          "msg.dev.audit.access_denied_detail",
-          "개발자 권한 신청 페이지에서 신청을 등록한 뒤 승인을 받아주세요.",
-        )}
+        deniedDetailMessage={deniedDetailMessage}
         actionLabel={t("ui.dev.nav.developer_request", "개발자 권한 신청")}
         onAction={() => navigate("/developer-requests")}
       />
diff --git a/devfront/src/features/clients/ClientsPage.test.tsx b/devfront/src/features/clients/ClientsPage.test.tsx
index 2f92ecba..6a958ff6 100644
--- a/devfront/src/features/clients/ClientsPage.test.tsx
+++ b/devfront/src/features/clients/ClientsPage.test.tsx
@@ -277,4 +277,31 @@ describe("ClientsPage", () => {
 
     expect(navigateMock).toHaveBeenCalledWith("/developer-requests");
   });
+
+  it("shows a tenant-required notice when tenant context is missing", async () => {
+    authState = {
+      user: {
+        access_token: "access-token",
+        profile: {
+          role: "user",
+          companyCode: "HANMAC",
+          name: "Requester",
+          email: "requester@example.com",
+          phone: "010-1234-5678",
+        },
+      },
+    };
+    fetchMeMock.mockResolvedValue({
+      role: "user",
+      name: "Requester",
+      email: "requester@example.com",
+      phone: "010-1234-5678",
+    });
+
+    const container = await renderPage();
+    expect(container.textContent).toContain(
+      "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+    );
+    expect(fetchDeveloperRequestStatusMock).not.toHaveBeenCalled();
+  });
 });
diff --git a/devfront/src/features/clients/ClientsPage.tsx b/devfront/src/features/clients/ClientsPage.tsx
index 6c22bc88..e82b2c5e 100644
--- a/devfront/src/features/clients/ClientsPage.tsx
+++ b/devfront/src/features/clients/ClientsPage.tsx
@@ -67,6 +67,7 @@ function ClientsPage() {
   const role = resolveProfileRole(userProfile);
   const tenantId = userProfile?.tenant_id as string | undefined;
   const companyCode = userProfile?.companyCode as string | undefined;
+  const isTenantContextMissing = !tenantId?.trim();
 
   const {
     data,
@@ -93,7 +94,8 @@ function ClientsPage() {
   } = useQuery({
     queryKey: ["developer-request", tenantId],
     queryFn: () => fetchDeveloperRequestStatus(tenantId),
-    enabled: hasAccessToken && profileRole === "user",
+    enabled:
+      hasAccessToken && profileRole === "user" && !isTenantContextMissing,
   });
   const { data: tenants } = useQuery({
     queryKey: ["myTenants"],
@@ -108,7 +110,9 @@ function ClientsPage() {
   const canCreateClient = createAccessState === "can_create";
   const isDeveloperRequestPending = createAccessState === "pending";
   const canRequestDeveloperAccess =
-    createAccessState === "request_required" && !isLoadingRequest;
+    createAccessState === "request_required" &&
+    !isLoadingRequest &&
+    !isTenantContextMissing;
 
   const [searchQuery, setSearchQuery] = useState("");
   const [typeFilter, setTypeFilter] = useState("all");
@@ -229,7 +233,20 @@ function ClientsPage() {
           "OIDC 클라이언트, 인증 방식, 리다이렉트 URI, 비밀키 재발행을 감사 로그와 함께 관리합니다.",
         )}
         actions={
-          canCreateClient ? (
+          isTenantContextMissing ? (
+            <div className="flex flex-col items-end gap-2 text-right">
+              <p className="max-w-xs text-sm text-muted-foreground">
+                {t(
+                  "msg.dev.clients.create_requires_tenant",
+                  "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+                )}
+              </p>
+              <Button type="button" variant="outline" size="sm" disabled>
+                <Plus className="h-4 w-4" />
+                {t("ui.dev.welcome.btn_request", "개발자 권한 신청")}
+              </Button>
+            </div>
+          ) : canCreateClient ? (
             <Button
               size="sm"
               className="mt-1 shadow-lg shadow-primary/30"
@@ -453,6 +470,11 @@ function ClientsPage() {
                                   "msg.dev.clients.empty_filtered",
                                   "조건에 맞는 연동 앱이 없습니다.",
                                 )
+                              : isTenantContextMissing
+                                ? t(
+                                    "msg.dev.clients.empty_tenant_missing",
+                                    "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+                                  )
                               : canCreateClient
                                 ? t(
                                     "msg.dev.clients.empty_can_create",
@@ -475,6 +497,11 @@ function ClientsPage() {
                                     "msg.dev.clients.empty_filtered_detail",
                                     "검색어나 필터 조건을 변경해 보세요.",
                                   )
+                                : isTenantContextMissing
+                                  ? t(
+                                      "msg.dev.clients.empty_tenant_missing_detail",
+                                      "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다.",
+                                    )
                                 : canCreateClient
                                   ? t(
                                       "msg.dev.clients.empty_can_create_detail",
@@ -499,6 +526,18 @@ function ClientsPage() {
                                 {t("ui.dev.clients.new", "연동 앱 추가")}
                               </button>
                             )}
+                            {!isFilteredOut && isTenantContextMissing && (
+                              <button
+                                type="button"
+                                className="font-bold text-muted-foreground"
+                                disabled
+                              >
+                                {t(
+                                  "ui.dev.welcome.btn_request",
+                                  "개발자 등록 신청하기",
+                                )}
+                              </button>
+                            )}
                             {!isFilteredOut && canRequestDeveloperAccess && (
                               <button
                                 type="button"
@@ -672,6 +711,7 @@ function RequestAccessModal({
   const [name, setName] = useState(initialName);
   const [organization, setOrganization] = useState(initialOrg);
   const [reason, setReason] = useState("");
+  const isTenantContextMissing = !tenantId.trim();
 
   useEffect(() => {
     if (!isOpen) return;
@@ -688,6 +728,15 @@ function RequestAccessModal({
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
+    if (isTenantContextMissing) {
+      alert(
+        t(
+          "msg.dev.clients.create_requires_tenant",
+          "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+        ),
+      );
+      return;
+    }
     mutation.mutate({
       name,
       organization,
diff --git a/devfront/src/features/developer-access/developerAccessGate.ts b/devfront/src/features/developer-access/developerAccessGate.ts
index e503aa74..2b1b6f60 100644
--- a/devfront/src/features/developer-access/developerAccessGate.ts
+++ b/devfront/src/features/developer-access/developerAccessGate.ts
@@ -9,12 +9,16 @@ export type DeveloperAccessGateState = {
   isDeveloperRequestPending: boolean;
   canRequestDeveloperAccess: boolean;
   isLoadingDeveloperAccessGate: boolean;
+  isTenantContextMissing: boolean;
 };
 
 export function resolveDeveloperAccessGate(
   profileRole: string,
   requestStatus?: DeveloperRequestStatus,
-): Omit<DeveloperAccessGateState, "isLoadingDeveloperAccessGate"> {
+): Omit<
+  DeveloperAccessGateState,
+  "isLoadingDeveloperAccessGate" | "isTenantContextMissing"
+> {
   const hasDeveloperAccess =
     profileRole === "super_admin" || requestStatus === "approved";
   const isDeveloperRequestPending = requestStatus === "pending";
@@ -55,10 +59,12 @@ export function useDeveloperAccessGate({
 }) {
   const shouldFetchRequestStatus =
     shouldFetchDeveloperRequestStatus(profileRole);
+  const isTenantContextMissing = !tenantId?.trim();
   const { data: requestStatus, isLoading: isLoadingRequestStatus } = useQuery({
     queryKey: ["developer-request", tenantId],
     queryFn: () => fetchDeveloperRequestStatus(tenantId),
-    enabled: hasAccessToken && shouldFetchRequestStatus,
+    enabled:
+      hasAccessToken && shouldFetchRequestStatus && !isTenantContextMissing,
   });
 
   const resolvedGate = resolveDeveloperAccessGate(
@@ -68,6 +74,9 @@ export function useDeveloperAccessGate({
 
   return {
     ...resolvedGate,
+    isTenantContextMissing,
+    canRequestDeveloperAccess:
+      resolvedGate.canRequestDeveloperAccess && !isTenantContextMissing,
     isLoadingDeveloperAccessGate: shouldShowDeveloperAccessLoading(
       profileRole,
       isLoadingIdentity,
diff --git a/devfront/src/features/developer-request/DeveloperRequestPage.test.tsx b/devfront/src/features/developer-request/DeveloperRequestPage.test.tsx
index c8bf3a10..652f008b 100644
--- a/devfront/src/features/developer-request/DeveloperRequestPage.test.tsx
+++ b/devfront/src/features/developer-request/DeveloperRequestPage.test.tsx
@@ -185,4 +185,33 @@ describe("DeveloperRequestPage", () => {
       tenantId: "tenant-1",
     });
   });
+
+  it("shows a tenant-required notice and hides the request button when tenant is missing", async () => {
+    authState = {
+      user: {
+        access_token: "access-token",
+        profile: {
+          role: "user",
+          companyCode: "HANMAC",
+          name: "Requester",
+          email: "requester@example.com",
+          phone: "010-1234-5678",
+        },
+      },
+    };
+    fetchMeMock.mockResolvedValue({
+      id: "user-1",
+      name: "Requester",
+      email: "requester@example.com",
+      phone: "010-1234-5678",
+      role: "user",
+    });
+
+    const container = await renderPage();
+    expect(container.textContent).toContain(
+      "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+    );
+    expect(container.textContent).not.toContain("신규 신청하기");
+    expect(requestDeveloperAccessMock).not.toHaveBeenCalled();
+  });
 });
diff --git a/devfront/src/features/developer-request/DeveloperRequestPage.tsx b/devfront/src/features/developer-request/DeveloperRequestPage.tsx
index 72b2b6de..3d6d31a3 100644
--- a/devfront/src/features/developer-request/DeveloperRequestPage.tsx
+++ b/devfront/src/features/developer-request/DeveloperRequestPage.tsx
@@ -56,6 +56,7 @@ export default function DeveloperRequestPage() {
   const role = resolveProfileRole(userProfile);
   const tenantId = userProfile?.tenant_id as string | undefined;
   const companyCode = userProfile?.companyCode as string | undefined;
+  const isTenantContextMissing = !tenantId?.trim();
 
   const [isRequestModalOpen, setIsRequestModalOpen] = useState(false);
   const [adminNotes, setAdminNotes] = useState<Record<number, string>>({});
@@ -179,7 +180,7 @@ export default function DeveloperRequestPage() {
               )
         }
         actions={
-          !isSuperAdmin && !hasActiveRequest ? (
+          !isSuperAdmin && !isTenantContextMissing && !hasActiveRequest ? (
             <Button onClick={() => setIsRequestModalOpen(true)}>
               <Plus className="mr-2 h-4 w-4" />
               {t("ui.dev.welcome.btn_request", "신규 신청하기")}
@@ -188,6 +189,28 @@ export default function DeveloperRequestPage() {
         }
       />
 
+      {!isSuperAdmin && isTenantContextMissing ? (
+        <Card className="border-amber-500/30 bg-amber-500/10">
+          <CardContent className="flex items-start gap-3 p-4">
+            <ShieldAlert className="mt-0.5 h-5 w-5 shrink-0 text-amber-600" />
+            <div className="space-y-1 text-left">
+              <p className="font-semibold text-foreground">
+                {t(
+                  "msg.dev.request.tenant_required",
+                  "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+                )}
+              </p>
+              <p className="text-sm text-muted-foreground">
+                {t(
+                  "msg.dev.request.tenant_required_detail",
+                  "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다.",
+                )}
+              </p>
+            </div>
+          </CardContent>
+        </Card>
+      ) : null}
+
       <Card className="glass-panel">
         <CardHeader>
           <CardTitle className="text-xl">
@@ -463,6 +486,15 @@ function RequestAccessModal({
 
   const handleSubmit = (e: React.FormEvent) => {
     e.preventDefault();
+    if (!tenantId.trim()) {
+      alert(
+        t(
+          "msg.dev.request.tenant_required",
+          "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+        ),
+      );
+      return;
+    }
     mutation.mutate({
       name,
       organization,
diff --git a/devfront/src/features/overview/GlobalOverviewPage.tsx b/devfront/src/features/overview/GlobalOverviewPage.tsx
index 89fd230e..eb1c5b39 100644
--- a/devfront/src/features/overview/GlobalOverviewPage.tsx
+++ b/devfront/src/features/overview/GlobalOverviewPage.tsx
@@ -968,6 +968,7 @@ function GlobalOverviewPage() {
     isDeveloperRequestPending,
     canRequestDeveloperAccess,
     isLoadingDeveloperAccessGate,
+    isTenantContextMissing,
   } = useDeveloperAccessGate({
     hasAccessToken,
     profileRole,
@@ -1266,6 +1267,24 @@ function GlobalOverviewPage() {
   }
 
   if (!hasDeveloperAccess) {
+    const deniedMessage = isTenantContextMissing
+      ? t(
+          "msg.dev.request.tenant_required",
+          "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다.",
+        )
+      : t(
+          "msg.dev.dashboard.access_denied",
+          "대시보드는 개발자 권한이 있어야 볼 수 있습니다.",
+        );
+    const deniedDetailMessage = isTenantContextMissing
+      ? t(
+          "msg.dev.request.tenant_required_detail",
+          "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다.",
+        )
+      : t(
+          "msg.dev.dashboard.access_denied_detail",
+          "개발자 권한 신청 페이지에서 신청을 등록한 뒤 승인을 받아주세요.",
+        );
     return (
       <DeveloperAccessRequestCard
         title={t("ui.common.overview.title", "운영 현황")}
@@ -1275,18 +1294,12 @@ function GlobalOverviewPage() {
           "msg.dev.dashboard.access_pending",
           "개발자 권한 신청을 검토 중입니다.",
         )}
-        deniedMessage={t(
-          "msg.dev.dashboard.access_denied",
-          "대시보드는 개발자 권한이 있어야 볼 수 있습니다.",
-        )}
         pendingDetailMessage={t(
           "msg.dev.dashboard.access_pending_detail",
           "super admin이 승인하면 개요와 개발자 기능을 사용할 수 있습니다.",
         )}
-        deniedDetailMessage={t(
-          "msg.dev.dashboard.access_denied_detail",
-          "개발자 권한 신청 페이지에서 신청을 등록한 뒤 승인을 받아주세요.",
-        )}
+        deniedMessage={deniedMessage}
+        deniedDetailMessage={deniedDetailMessage}
         actionLabel={t("ui.dev.nav.developer_request", "개발자 권한 신청")}
         onAction={() => navigate("/developer-requests")}
       />
diff --git a/devfront/src/locales/en.toml b/devfront/src/locales/en.toml
index 2a4db872..6444f193 100644
--- a/devfront/src/locales/en.toml
+++ b/devfront/src/locales/en.toml
@@ -329,6 +329,8 @@ user_desc = "Review your request history and submit a new access request."
 
 [msg.dev.request.modal]
 desc = "Please enter the reason for your request. It will be approved after administrator review."
+tenant_required = "You need to be assigned to a tenant before you can request developer access."
+tenant_required_detail = "This account is not linked to a tenant yet, so developer access cannot be requested."
 
 [msg.dev.clients]
 load_error = "Error loading clients: {{error}}"
@@ -342,12 +344,16 @@ empty_detail = "RPs will appear here when a relationship is assigned to your acc
 empty_can_create = "No linked apps have been registered yet."
 empty_can_create_detail = "Create a new RP with the Add linked app button, and it will appear here."
 create_requires_request = "You do not have permission to create applications.\nSubmit a developer access request and wait for approval."
+create_requires_tenant = "You need to be assigned to a tenant before you can request developer access."
+create_requires_tenant_detail = "This account is not linked to a tenant yet, so developer access cannot be requested."
 create_pending_detail = "Your developer access request is under review. You will be able to add applications after approval."
 create_forbidden_detail = "You do not have permission to create applications. Ask an administrator to grant developer access or the appropriate RP permissions."
 empty_filtered = "No linked apps match the current filters."
 empty_filtered_detail = "Try changing the search text or filters."
 empty_pending = "Your developer access request is under review."
 empty_pending_detail = "You can add linked apps after a super admin approves it."
+empty_tenant_missing = "You need to be assigned to a tenant before you can request developer access."
+empty_tenant_missing_detail = "This account is not linked to a tenant yet, so developer access cannot be requested."
 
 [msg.dev.clients.consents]
 empty = "No consents found."
diff --git a/devfront/src/locales/ko.toml b/devfront/src/locales/ko.toml
index 00745fa5..1cd99b36 100644
--- a/devfront/src/locales/ko.toml
+++ b/devfront/src/locales/ko.toml
@@ -329,6 +329,8 @@ user_desc = "내 신청 내역을 확인하고 새로운 권한을 신청할 수
 
 [msg.dev.request.modal]
 desc = "신청 사유를 입력해 주세요. 관리자 확인 후 승인됩니다."
+tenant_required = "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다."
+tenant_required_detail = "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다."
 
 [msg.dev.clients]
 deleted = "앱이 삭제되었습니다."
@@ -339,12 +341,16 @@ empty_detail = "RP 관계가 부여되면 이 목록에 해당 RP가 표시됩
 empty_can_create = "아직 등록된 연동 앱이 없습니다."
 empty_can_create_detail = "연동 앱 추가 버튼으로 새 RP를 생성하면 이 목록에 표시됩니다."
 create_requires_request = "연동 앱을 생성할 권한이 없습니다.\n개발자 권한 신청을 요청한 뒤 승인 받아주세요."
+create_requires_tenant = "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다."
+create_requires_tenant_detail = "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다."
 create_pending_detail = "개발자 권한 신청을 검토 중입니다. 승인되면 연동 앱을 추가할 수 있습니다."
 create_forbidden_detail = "연동 앱을 생성할 권한이 없습니다. 관리자에게 개발자 권한 또는 적절한 RP 권한 부여를 요청해 주세요."
 empty_filtered = "조건에 맞는 연동 앱이 없습니다."
 empty_filtered_detail = "검색어나 필터 조건을 변경해 보세요."
 empty_pending = "개발자 권한 신청을 검토 중입니다."
 empty_pending_detail = "super admin이 승인하면 연동 앱을 추가할 수 있습니다."
+empty_tenant_missing = "개발자 권한을 신청하려면 먼저 테넌트에 소속되어 있어야 합니다."
+empty_tenant_missing_detail = "현재 계정은 테넌트와 연결되어 있지 않아 개발자 권한을 신청할 수 없습니다."
 load_error = "앱 정보를 불러오지 못했습니다: {{error}}"
 loading = "앱 정보를 불러오는 중..."
 showing = "총 {{shown}}개의 애플리케이션이 등록되어 있습니다."
diff --git a/devfront/src/locales/template.toml b/devfront/src/locales/template.toml
index 3c4bc50a..ff65ef21 100644
--- a/devfront/src/locales/template.toml
+++ b/devfront/src/locales/template.toml
@@ -343,6 +343,8 @@ user_desc = ""
 
 [msg.dev.request.modal]
 desc = ""
+tenant_required = ""
+tenant_required_detail = ""
 
 [msg.dev.request.status]
 approved = ""
@@ -379,6 +381,8 @@ empty = ""
 empty_detail = ""
 empty_can_create = ""
 empty_can_create_detail = ""
+create_requires_tenant = ""
+create_requires_tenant_detail = ""
 create_requires_request = ""
 create_pending_detail = ""
 create_forbidden_detail = ""
@@ -386,6 +390,8 @@ empty_filtered = ""
 empty_filtered_detail = ""
 empty_pending = ""
 empty_pending_detail = ""
+empty_tenant_missing = ""
+empty_tenant_missing_detail = ""
 
 [msg.dev.clients.consents]
 empty = ""