diff --git a/packages/api/src/builders/builders.repository.ts b/packages/api/src/builders/builders.repository.ts
index 609bd3d3..0919a35f 100644
--- a/packages/api/src/builders/builders.repository.ts
+++ b/packages/api/src/builders/builders.repository.ts
@@ -45,7 +45,7 @@ export function findAll(
   search: string | undefined,
   limit: number,
   offset: number,
-): E.Effect<{ data: BuilderDocument[]; total: number }, CollectionNotFoundError | DatabaseError> {
+): E.Effect<{ data: BuilderDocument[]; total: number; unmigrated: number }, CollectionNotFoundError | DatabaseError> {
   const filter: Record<string, unknown> = {};
   if (search) {
     const escaped = search.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
@@ -64,9 +64,13 @@ export function findAll(
           try: () => collection.countDocuments(filter),
           catch: (cause) => new DatabaseError({ cause, message: "findAll:count" }),
         }),
+        E.tryPromise({
+          try: () => collection.countDocuments({ creditsUsd: { $exists: false } }),
+          catch: (cause) => new DatabaseError({ cause, message: "findAll:unmigrated" }),
+        }),
       ]),
     ),
-    E.map(([data, total]) => ({ data, total })),
+    E.map(([data, total, unmigrated]) => ({ data, total, unmigrated })),
   );
 }
 
diff --git a/packages/api/src/credits/credits.controllers.ts b/packages/api/src/credits/credits.controllers.ts
index 840feb47..b834d5cd 100644
--- a/packages/api/src/credits/credits.controllers.ts
+++ b/packages/api/src/credits/credits.controllers.ts
@@ -374,7 +374,7 @@ export function adminListBuilders(options: ControllerOptions): void {
       return pipe(
         BuildersRepository.findAll(c.env, search, limit, offset),
         E.map(
-          ({ data, total }): AdminListBuildersResponse => ({
+          ({ data, total, unmigrated }): AdminListBuildersResponse => ({
             data: data.map((b) => ({
               did: b.did,
               name: b.name,
@@ -384,7 +384,7 @@ export function adminListBuilders(options: ControllerOptions): void {
                 : b.status) as BuilderStatusDto,
               storageBytes: b.storageBytes ?? 0,
             })),
-            pagination: { total, limit, offset },
+            pagination: { total, limit, offset, unmigrated },
           }),
         ),
         E.map((response) => c.json<AdminListBuildersResponse>(response)),
diff --git a/packages/types/src/admin.dto.ts b/packages/types/src/admin.dto.ts
index f51d7860..cdcf7d89 100644
--- a/packages/types/src/admin.dto.ts
+++ b/packages/types/src/admin.dto.ts
@@ -1,7 +1,7 @@
 import { z } from "zod";
 
 import { BuilderStatusDto } from "./credits.dto";
-import { PaginatedResponse } from "./pagination.dto";
+import { SortQuerySchema } from "./pagination.dto";
 import { ApiSuccessResponse } from "./responses.dto";
 
 /**
@@ -43,10 +43,20 @@ const AdminBuilderDto = z.object({
 
 /**
  * Paginated list of builders for admin view.
+ * Extends the standard pagination with an unmigrated count for the migration banner.
  */
-export const AdminListBuildersResponse = PaginatedResponse(AdminBuilderDto).meta({
-  ref: "AdminListBuildersResponse",
-});
+export const AdminListBuildersResponse = z
+  .object({
+    data: z.array(AdminBuilderDto),
+    pagination: z.object({
+      total: z.number().int().min(0),
+      limit: z.number().int().min(1),
+      offset: z.number().int().min(0),
+      sort: SortQuerySchema,
+      unmigrated: z.number().int().min(0),
+    }),
+  })
+  .meta({ ref: "AdminListBuildersResponse" });
 export type AdminListBuildersResponse = z.infer<typeof AdminListBuildersResponse>;
 
 /**