diff --git a/app/code/Magento/Sales/Block/Adminhtml/Order/Create/Totals/Grandtotal.php b/app/code/Magento/Sales/Block/Adminhtml/Order/Create/Totals/Grandtotal.php
index ab06f423eb4d5..99b61fd64e124 100644
--- a/app/code/Magento/Sales/Block/Adminhtml/Order/Create/Totals/Grandtotal.php
+++ b/app/code/Magento/Sales/Block/Adminhtml/Order/Create/Totals/Grandtotal.php
@@ -70,6 +70,10 @@ public function includeTax()
      */
     public function getTotalExclTax()
     {
+        // The tax key will not exist if a quote contains no items
+        if (!isset($this->getTotals()['tax'])) {
+            return $this->getTotals()['grand_total']->getValue();
+        }
         $excl = $this->getTotals()['grand_total']->getValue() - $this->getTotals()['tax']->getValue();
         $excl = max($excl, 0);
         return $excl;