diff --git a/app/models/Depreciation.php b/app/models/Depreciation.php
index 8413364801..940dd35b5b 100644
--- a/app/models/Depreciation.php
+++ b/app/models/Depreciation.php
@@ -8,5 +8,9 @@ class Depreciation extends Elegant {
 			'months'   => 'required|min:1|integer',
 		);
 
+	public function has_models()
+	{
+		return $this->hasMany('Model', 'depreciation_id')->count();
+	}
 
 }