diff --git a/app/controllers/admin/enterprise_fees_controller.rb b/app/controllers/admin/enterprise_fees_controller.rb
index 2b4852a613..ad17c5d90d 100644
--- a/app/controllers/admin/enterprise_fees_controller.rb
+++ b/app/controllers/admin/enterprise_fees_controller.rb
@@ -35,6 +35,13 @@ module Admin
     end
 
     def bulk_update
+      @flat_percent_value = enterprise_fee_bulk_params.dig('collection_attributes', '0', 'calculator_attributes', 'preferred_flat_percent')
+      
+      unless @flat_percent_value.nil? || Float(@flat_percent_value, exception: false) 
+        flash[:error] = I18n.t(:calculator_preferred_value_error) 
+        return redirect_to redirect_path      
+      end
+      
       @enterprise_fee_set = Sets::EnterpriseFeeSet.new(enterprise_fee_bulk_params)
 
       if @enterprise_fee_set.save