diff --git a/models/AccountThreshold.php b/models/AccountThreshold.php
new file mode 100644
index 0000000..daa8251
--- /dev/null
+++ b/models/AccountThreshold.php
@@ -0,0 +1,47 @@
+<?php
+
+namespace app\models;
+
+use Yii;
+use yii\db\ActiveRecord;
+
+class AccountThreshold extends ActiveRecord
+{
+    public function rules()
+    {
+        return [
+            [['account_id', 'threshold_value', 'max_notifications', 'cooldown_period'], 'required'],
+            [['threshold_value'], 'number', 'min' => 0],
+            [['max_notifications', 'cooldown_period'], 'integer', 'min' => 0],
+            [['last_notification_at'], 'safe'],
+            [['account_id'], 'exist', 'targetClass' => Account::class, 'targetAttribute' => 'id'],
+            [['last_notification_at'], 'date', 'format' => 'php:Y-m-d H:i:s'],
+        ];
+    }
+
+    public static function tableName()
+    {
+        return 'account_thresholds';
+    }
+
+    public function getAccount()
+    {
+        return $this->hasOne(Account::class, ['id' => 'account_id']);
+    }
+
+    public function getNotifications()
+    {
+        return $this->hasMany(Notification::class, ['threshold_id' => 'id']);
+    }
+
+    public function beforeSave($insert)
+    {
+        if (parent::beforeSave($insert)) {
+            if ($insert) {
+                $this->last_notification_at = null;
+            }
+            return true;
+        }
+        return false;
+    }
+}
\ No newline at end of file