diff --git a/adminfront/src/features/users/UserCreatePage.tsx b/adminfront/src/features/users/UserCreatePage.tsx
index 01622ab3..14245071 100644
--- a/adminfront/src/features/users/UserCreatePage.tsx
+++ b/adminfront/src/features/users/UserCreatePage.tsx
@@ -409,6 +409,7 @@ function UserCreatePage() {
           tenantId: appointment.tenantId,
           tenantSlug: appointment.tenantSlug,
           tenantName: appointment.tenantName,
+          isPrimary: appointment.isOwner,
           isOwner: appointment.isOwner,
           jobTitle: appointment.jobTitle,
           position: appointment.position,
@@ -424,6 +425,14 @@ function UserCreatePage() {
         return;
       }
 
+      const primary = appointments.find((a) => a.isOwner);
+      if (primary) {
+        metadata.primaryTenantId = primary.tenantId;
+        metadata.primaryTenantSlug = primary.tenantSlug;
+        metadata.primaryTenantName = primary.tenantName;
+        metadata.primaryTenantIsOwner = true;
+      }
+
       payload.additionalAppointments = appointments;
       payload.metadata = {
         ...metadata,
diff --git a/adminfront/src/features/users/UserDetailPage.tsx b/adminfront/src/features/users/UserDetailPage.tsx
index f115e165..0e7b67ef 100644
--- a/adminfront/src/features/users/UserDetailPage.tsx
+++ b/adminfront/src/features/users/UserDetailPage.tsx
@@ -754,12 +754,26 @@ function UserDetailPage() {
           tenantId: appointment.tenantId,
           tenantSlug: appointment.tenantSlug,
           tenantName: appointment.tenantName,
+          isPrimary: appointment.isOwner,
           isOwner: appointment.isOwner,
           jobTitle: appointment.jobTitle,
           position: appointment.position,
         }));
 
-      payload.tenantSlug = undefined;
+      const primary = appointments.find((a) => a.isOwner);
+      if (primary) {
+        payload.tenantSlug = primary.tenantSlug;
+        payload.primaryTenantId = primary.tenantId;
+        payload.primaryTenantName = primary.tenantName;
+        payload.primaryTenantIsOwner = true;
+        metadata.primaryTenantId = primary.tenantId;
+        metadata.primaryTenantSlug = primary.tenantSlug;
+        metadata.primaryTenantName = primary.tenantName;
+        metadata.primaryTenantIsOwner = true;
+      } else {
+        payload.tenantSlug = undefined;
+      }
+
       payload.department = undefined;
       payload.position = undefined;
       payload.jobTitle = undefined;
diff --git a/adminfront/tests/users.spec.ts b/adminfront/tests/users.spec.ts
index 4f2d859e..25ff96b5 100644
--- a/adminfront/tests/users.spec.ts
+++ b/adminfront/tests/users.spec.ts
@@ -766,7 +766,7 @@ test.describe("User Management", () => {
                   tenantId: "03dbe16b-e47b-4f72-927b-782807d67a35",
                   tenantSlug: "tech-planning",
                   tenantName: "기술기획",
-                  isOwner: false,
+                  isOwner: true,
                   jobTitle: "플랫폼 운영",
                   position: "책임",
                 },
@@ -774,7 +774,7 @@ test.describe("User Management", () => {
                   tenantId: "hanmac-team-id",
                   tenantSlug: "hanmac-team",
                   tenantName: "한맥팀",
-                  isOwner: true,
+                  isOwner: false,
                   jobTitle: "개발",
                   position: "선임",
                 },