diff --git a/modules/splashsync/src/Objects/Order/TotalsTrait.php b/modules/splashsync/src/Objects/Order/TotalsTrait.php
index 06752a85..522f7030 100644
--- a/modules/splashsync/src/Objects/Order/TotalsTrait.php
+++ b/modules/splashsync/src/Objects/Order/TotalsTrait.php
@@ -142,7 +142,7 @@ private function getTotalsFields(string $key, string $fieldName): void
      */
     private static function toVatPercents(float $priceTaxExcl, float $priceTaxIncl): float
     {
-        return (($priceTaxExcl > 0) && ($priceTaxIncl > 0))
+        return (($priceTaxExcl > 0) && ($priceTaxIncl > 0) && ($priceTaxExcl > $priceTaxIncl))
             ? 100 * ($priceTaxIncl - $priceTaxExcl) / $priceTaxExcl
             : 0.0
         ;