diff --git a/src/admin/lib/queries/orders.ts b/src/admin/lib/queries/orders.ts
index 8b70bd1..715d2e0 100644
--- a/src/admin/lib/queries/orders.ts
+++ b/src/admin/lib/queries/orders.ts
@@ -82,3 +82,12 @@ export const orderDetailOptions = (id: string | undefined) =>
     queryFn: () => jsonQuery<OrderData>(`/api/admin/orders/${id}`),
     enabled: !!id,
   });
+
+export const orderNextNumberOptions = () =>
+  queryOptions({
+    queryKey: ["orders", "next-number"],
+    queryFn: () =>
+      jsonQuery<{ next_number?: string; number?: string }>(
+        "/api/admin/orders/next-number",
+      ),
+  });
diff --git a/src/admin/lib/queries/projects.ts b/src/admin/lib/queries/projects.ts
index bfe0282..f539f34 100644
--- a/src/admin/lib/queries/projects.ts
+++ b/src/admin/lib/queries/projects.ts
@@ -109,3 +109,12 @@ export const projectFilesOptions = (projectId: number, path: string) =>
       };
     },
   });
+
+export const projectNextNumberOptions = () =>
+  queryOptions({
+    queryKey: ["projects", "next-number"],
+    queryFn: () =>
+      jsonQuery<{ next_number?: string; number?: string }>(
+        "/api/admin/projects/next-number",
+      ),
+  });