diff --git a/app/Http/Controllers/ClientPortalController.php b/app/Http/Controllers/ClientPortalController.php
index fab55f18d6fe..a47e1a62f814 100644
--- a/app/Http/Controllers/ClientPortalController.php
+++ b/app/Http/Controllers/ClientPortalController.php
@@ -998,7 +998,7 @@ class ClientPortalController extends BaseController
             $rules['first_name'] = 'required';
             $rules['last_name'] = 'required';
         }
-        if ($account->vat_number) {
+        if ($account->vat_number || $account->isNinjaAccount()) {
             $rules['vat_number'] = 'required';
         }
 
diff --git a/resources/views/invited/details.blade.php b/resources/views/invited/details.blade.php
index b78e57005000..3b5701cd2b98 100644
--- a/resources/views/invited/details.blade.php
+++ b/resources/views/invited/details.blade.php
@@ -69,7 +69,7 @@
                                 ->placeholder(trans('texts.email'))
                                 ->label('') !!}
                     </div>
-                    @if ($account->vat_number)
+                    @if ($account->vat_number || $account->isNinjaAccount())
                         <div class="col-md-6">
                             {!! Former::text('vat_number')
                                     ->placeholder(trans('texts.vat_number'))