diff --git a/.changeset/business-unit-import-export.md b/.changeset/business-unit-import-export.md
new file mode 100644
index 0000000000..7e0e0bbd66
--- /dev/null
+++ b/.changeset/business-unit-import-export.md
@@ -0,0 +1,17 @@
+---
+"@objectstack/platform-objects": patch
+---
+
+fix(platform-objects): allow import/export on sys_business_unit (#3025)
+
+The Business Units list (Setup → Business Units) surfaces Import/Export buttons,
+but `sys_business_unit` declared a restrictive `enable.apiMethods` whitelist of
+only the five CRUD verbs. The REST data plane gates import/export on that
+whitelist (ADR-0049), so both buttons returned `405 OBJECT_API_METHOD_NOT_ALLOWED`.
+
+This was an unintentional gap, not a deliberate restriction: the object's fields
+(`external_ref`, `effective_from/to`) are designed for HRIS batch sync, and the
+org tree is expected to support bulk import. Added `'import'` and `'export'` to
+the whitelist. Import reuses the `create`/`update` affordances the object already
+grants, and the managed-object reconciliation backstop leaves import/export
+untouched (it only strips write verbs). Regression test added.
diff --git a/packages/platform-objects/src/identity/sys-business-unit.object.ts b/packages/platform-objects/src/identity/sys-business-unit.object.ts
index 94b94b75d3..bc9cbc1292 100644
--- a/packages/platform-objects/src/identity/sys-business-unit.object.ts
+++ b/packages/platform-objects/src/identity/sys-business-unit.object.ts
@@ -216,7 +216,10 @@ export const SysBusinessUnit = ObjectSchema.create({
     trackHistory: true,
     searchable: true,
     apiEnabled: true,
-    apiMethods: ['get', 'list', 'create', 'update', 'delete'],
+    // Data portability is expected for the org tree: fields like `external_ref`
+    // and `effective_from/to` are designed for HRIS batch sync (#3025). Import
+    // reuses the create/update affordances this object already grants.
+    apiMethods: ['get', 'list', 'create', 'update', 'delete', 'import', 'export'],
     trash: true,
     mru: false,
   },
diff --git a/packages/platform-objects/src/platform-objects.test.ts b/packages/platform-objects/src/platform-objects.test.ts
index 7af69ef9b6..25c385fa8f 100644
--- a/packages/platform-objects/src/platform-objects.test.ts
+++ b/packages/platform-objects/src/platform-objects.test.ts
@@ -4,6 +4,7 @@ import { describe, expect, it } from 'vitest';
 import {
   SysAccount,
   SysApiKey,
+  SysBusinessUnit,
   SysDeviceCode,
   SysInvitation,
   SysJwks,
@@ -230,6 +231,23 @@ describe('@objectstack/platform-objects', () => {
     });
   });
 
+  describe('data portability whitelist (#3025)', () => {
+    it('sys_business_unit allows import/export so the org tree can be batch-synced', () => {
+      // The Business Units list exposes Import/Export buttons and the object's
+      // schema (external_ref, effective_from/to) is designed for HRIS batch
+      // sync. The REST data plane gates these routes on `enable.apiMethods`
+      // (ADR-0049), so both verbs must be present or the buttons 405 with
+      // OBJECT_API_METHOD_NOT_ALLOWED. Regression guard for #3025.
+      expect(SysBusinessUnit.enable?.apiMethods).toContain('import');
+      expect(SysBusinessUnit.enable?.apiMethods).toContain('export');
+      // The five CRUD verbs it already granted must remain — import writes
+      // reuse the create/update affordances.
+      for (const verb of ['get', 'list', 'create', 'update', 'delete'] as const) {
+        expect(SysBusinessUnit.enable?.apiMethods).toContain(verb);
+      }
+    });
+  });
+
   describe('SETUP_APP (ADR-0029 D7 shell)', () => {
     it('parses cleanly through AppSchema', () => {
       expect(() => AppSchema.parse(SETUP_APP)).not.toThrow();