diff --git a/src/Contracts/Buyable.php b/src/Contracts/Buyable.php
index 675e378..d086d22 100644
--- a/src/Contracts/Buyable.php
+++ b/src/Contracts/Buyable.php
@@ -28,4 +28,9 @@ interface Buyable
      * Get the weight of the Buyable item.
      */
     public function getBuyableWeight(CartItemOptions $options): int;
+    
+    /**
+     * Get the taxRate of the Buyable item.
+     */
+    public function getBuyableTaxRate(CartItemOptions $options): float
 }