diff --git a/CRM/Contribute/BAO/Contribution/Utils.php b/CRM/Contribute/BAO/Contribution/Utils.php
index a5a20458b28d..819243e87fbf 100644
--- a/CRM/Contribute/BAO/Contribution/Utils.php
+++ b/CRM/Contribute/BAO/Contribution/Utils.php
@@ -931,7 +931,7 @@ public static function getFirstLastDetails($contactID) {
    */
   public static function calculateTaxAmount($amount, $taxRate) {
     $taxAmount = array();
-    $taxAmount['tax_amount'] = round(($taxRate / 100) * CRM_Utils_Rule::cleanMoney($amount), 2);
+    $taxAmount['tax_amount'] = round(($taxRate / 100) * CRM_Utils_Rule::cleanMoney($amount), 4);
 
     return $taxAmount;
   }