diff --git a/app/code/Magento/Catalog/Pricing/Price/MinimalTierPriceCalculator.php b/app/code/Magento/Catalog/Pricing/Price/MinimalTierPriceCalculator.php
index 387ef9416ef68..a5e573caa381e 100644
--- a/app/code/Magento/Catalog/Pricing/Price/MinimalTierPriceCalculator.php
+++ b/app/code/Magento/Catalog/Pricing/Price/MinimalTierPriceCalculator.php
@@ -29,8 +29,10 @@ public function __construct(CalculatorInterface $calculator)
     }
 
     /**
-     * Get raw value of "as low as" as a minimal among tier prices
-     * {@inheritdoc}
+     * Get raw value of "as low as" as a minimal among tier prices{@inheritdoc}
+     *
+     * @param SaleableInterface $saleableItem
+     * @return float|null
      */
     public function getValue(SaleableInterface $saleableItem)
     {
@@ -49,8 +51,10 @@ public function getValue(SaleableInterface $saleableItem)
     }
 
     /**
-     * Return calculated amount object that keeps "as low as" value
-     * {@inheritdoc}
+     * Return calculated amount object that keeps "as low as" value{@inheritdoc}
+     *
+     * @param SaleableInterface $saleableItem
+     * @return AmountInterface|null
      */
     public function getAmount(SaleableInterface $saleableItem)
     {
@@ -58,6 +62,6 @@ public function getAmount(SaleableInterface $saleableItem)
 
         return $value === null
             ? null
-            : $this->calculator->getAmount($value, $saleableItem);
+            : $this->calculator->getAmount($value, $saleableItem, 'tax');
     }
 }