diff --git a/app/Models/Service.php b/app/Models/Service.php
index 58991be..e774248 100644
--- a/app/Models/Service.php
+++ b/app/Models/Service.php
@@ -1190,7 +1190,7 @@ class Service extends Model implements IDs
 	 */
 	public function isBilled(): bool
 	{
-		return ! ($this->external_billing && $this->suspend_billing);
+		return ! ($this->external_billing || $this->suspend_billing || ($this->price == 0));
 	}
 
 	/**