diff -Nuar a/vendor/magento/module-catalog-graph-ql/Model/Resolver/Product/PriceRange.php b/vendor/magento/module-catalog-graph-ql/Model/Resolver/Product/PriceRange.php
index dbb52f20109..0d91cfe0a26 100644
--- a/vendor/magento/module-catalog-graph-ql/Model/Resolver/Product/PriceRange.php
+++ b/vendor/magento/module-catalog-graph-ql/Model/Resolver/Product/PriceRange.php
@@ -62,6 +62,13 @@ class PriceRange implements ResolverInterface
         $product = $value['model'];
         $product->unsetData('minimal_price');
 
+        if ($context) {
+            $customerGroupId = $context->getExtensionAttributes()->getCustomerGroupId();
+            if ($customerGroupId !== null) {
+                $product->setCustomerGroupId($customerGroupId);
+            }
+        }
+
         $requestedFields = $info->getFieldSelection(10);
         $returnArray = [];
 
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/Plugin/Pricing/Price/UpdateCatalogRulePrice.php b/vendor/magento/module-catalog-rule-graph-ql/Plugin/Pricing/Price/UpdateCatalogRulePrice.php
new file mode 100644
index 00000000000..61b9f70c49f
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/Plugin/Pricing/Price/UpdateCatalogRulePrice.php
@@ -0,0 +1,68 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\CatalogRuleGraphQl\Plugin\Pricing\Price;
+
+use Magento\CatalogRule\Model\ResourceModel\Rule;
+use Magento\CatalogRule\Pricing\Price\CatalogRulePrice;
+use Magento\Framework\Stdlib\DateTime\TimezoneInterface;
+
+/**
+ * Class UpdateCatalogRulePrice
+ *
+ * Plugin to update catalog rule price based on customer group id
+ */
+class UpdateCatalogRulePrice
+{
+    /**
+     * @var TimezoneInterface
+     */
+    private $dateTime;
+
+    /**
+     * @var Rule
+     */
+    private $ruleResource;
+
+    /**
+     * @param TimezoneInterface $dateTime
+     * @param Rule $ruleResource
+     */
+    public function __construct(
+        TimezoneInterface $dateTime,
+        Rule $ruleResource
+    ) {
+        $this->dateTime = $dateTime;
+        $this->ruleResource = $ruleResource;
+    }
+
+    /**
+     * Returns catalog rule value for logged in customer group
+     *
+     * @param CatalogRulePrice $catalogRulePrice
+     * @param float|boolean $value
+     * @return float|boolean
+     */
+    public function afterGetValue(
+        CatalogRulePrice $catalogRulePrice,
+        $value
+    ) {
+        $product = $catalogRulePrice->getProduct();
+        if ($product && $product->getCustomerGroupId()) {
+            $store = $product->getStore();
+            $value = $this->ruleResource->getRulePrice(
+                $this->dateTime->scopeDate($store->getId()),
+                $store->getWebsiteId(),
+                $product->getCustomerGroupId(),
+                $product->getId()
+            );
+            $value = $value ? (float) $value : false;
+        }
+
+        return $value;
+    }
+}
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/README.md b/vendor/magento/module-catalog-rule-graph-ql/README.md
new file mode 100644
index 00000000000..16a36aa3ca0
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/README.md
@@ -0,0 +1,3 @@
+# CatalogRuleGraphQl
+ 
+The *Magento_CatalogRuleGraphQl* module applies catalog rules to products for GraphQL requests.
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/composer.json b/vendor/magento/module-catalog-rule-graph-ql/composer.json
new file mode 100644
index 00000000000..c82d9bb20dd
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/composer.json
@@ -0,0 +1,24 @@
+{
+    "name": "magento/module-catalog-rule-graph-ql",
+    "description": "N/A",
+    "type": "magento2-module",
+    "require": {
+        "php": "~7.3.0||~7.4.0",
+        "magento/framework": "*"
+    },
+    "suggest": {
+        "magento/module-catalog-rule": "*"
+    },
+    "license": [
+        "OSL-3.0",
+        "AFL-3.0"
+    ],
+    "autoload": {
+        "files": [
+            "registration.php"
+        ],
+        "psr-4": {
+            "Magento\\CatalogRuleGraphQl\\": ""
+        }
+    }
+}
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/etc/graphql/di.xml b/vendor/magento/module-catalog-rule-graph-ql/etc/graphql/di.xml
new file mode 100644
index 00000000000..571783edece
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/etc/graphql/di.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
+    <type name="Magento\CatalogRule\Pricing\Price\CatalogRulePrice">
+        <plugin name="update_catalog_rule_price_for_logged_in_customer_group" type="Magento\CatalogRuleGraphQl\Plugin\Pricing\Price\UpdateCatalogRulePrice"/>
+    </type>
+</config>
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/etc/graphql/events.xml b/vendor/magento/module-catalog-rule-graph-ql/etc/graphql/events.xml
new file mode 100644
index 00000000000..0d0a1fef535
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/etc/graphql/events.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
+    <event name="catalog_product_get_final_price">
+        <observer name="catalogrule" instance="Magento\CatalogRule\Observer\ProcessFrontFinalPriceObserver" />
+    </event>
+    <event name="prepare_catalog_product_collection_prices">
+        <observer name="catalogrule" instance="Magento\CatalogRule\Observer\PrepareCatalogProductCollectionPricesObserver" />
+    </event>
+</config>
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/etc/module.xml b/vendor/magento/module-catalog-rule-graph-ql/etc/module.xml
new file mode 100644
index 00000000000..affc22f35a7
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/etc/module.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0"?>
+<!--
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+-->
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
+    <module name="Magento_CatalogRuleGraphQl" />
+</config>
diff -Nuar a/vendor/magento/module-catalog-rule-graph-ql/registration.php b/vendor/magento/module-catalog-rule-graph-ql/registration.php
new file mode 100644
index 00000000000..df4dcd1cb47
--- /dev/null
+++ b/vendor/magento/module-catalog-rule-graph-ql/registration.php
@@ -0,0 +1,9 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+use Magento\Framework\Component\ComponentRegistrar;
+
+ComponentRegistrar::register(ComponentRegistrar::MODULE, 'Magento_CatalogRuleGraphQl', __DIR__);
diff -Nuar a/vendor/magento/module-customer/Model/Group/Resolver.php b/vendor/magento/module-customer/Model/Group/Resolver.php
new file mode 100644
index 00000000000..fd797d744e6
--- /dev/null
+++ b/vendor/magento/module-customer/Model/Group/Resolver.php
@@ -0,0 +1,40 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Customer\Model\Group;
+
+use Magento\Customer\Model\ResourceModel\Group\Resolver as ResolverResource;
+
+/**
+ * Lightweight service for getting current customer group based on customer id
+ */
+class Resolver
+{
+    /**
+     * @var ResolverResource
+     */
+    private $resolverResource;
+
+    /**
+     * @param ResolverResource $resolverResource
+     */
+    public function __construct(ResolverResource $resolverResource)
+    {
+        $this->resolverResource = $resolverResource;
+    }
+
+    /**
+     * Return customer group id
+     *
+     * @param int $customerId
+     * @return int|null
+     */
+    public function resolve(int $customerId) : ?int
+    {
+        return $this->resolverResource->resolve($customerId);
+    }
+}
diff -Nuar a/vendor/magento/module-customer/Model/ResourceModel/Group/Resolver.php b/vendor/magento/module-customer/Model/ResourceModel/Group/Resolver.php
new file mode 100644
index 00000000000..82c2cf2449c
--- /dev/null
+++ b/vendor/magento/module-customer/Model/ResourceModel/Group/Resolver.php
@@ -0,0 +1,58 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Customer\Model\ResourceModel\Group;
+
+use Magento\Framework\App\ResourceConnection;
+
+/**
+ * Resource model for customer group resolver service
+ */
+class Resolver
+{
+    /**
+     * @var ResourceConnection
+     */
+    private $resourceConnection;
+
+    /**
+     * @param ResourceConnection $resourceConnection
+     */
+    public function __construct(
+        ResourceConnection $resourceConnection
+    ) {
+        $this->resourceConnection = $resourceConnection;
+    }
+
+    /**
+     * Resolve customer group from db
+     *
+     * @param int $customerId
+     * @return int|null
+     */
+    public function resolve(int $customerId) : ?int
+    {
+        $result = null;
+
+        $connection = $this->resourceConnection->getConnection();
+        $tableName = $this->resourceConnection->getTableName('customer_entity');
+
+        $query = $connection
+            ->select()
+            ->from(
+                ['main_table' => $tableName],
+                ['main_table.group_id']
+            )
+            ->where('main_table.entity_id = ?', $customerId);
+        $groupId = $connection->fetchOne($query);
+        if ($groupId) {
+            $result = (int) $groupId;
+        }
+
+        return $result;
+    }
+}
diff -Nuar a/vendor/magento/module-customer-graph-ql/Model/Context/AddCustomerGroupToContext.php b/vendor/magento/module-customer-graph-ql/Model/Context/AddCustomerGroupToContext.php
new file mode 100644
index 00000000000..aaa2b85636f
--- /dev/null
+++ b/vendor/magento/module-customer-graph-ql/Model/Context/AddCustomerGroupToContext.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\CustomerGraphQl\Model\Context;
+
+use Magento\Authorization\Model\UserContextInterface;
+use Magento\GraphQl\Model\Query\ContextParametersInterface;
+use Magento\GraphQl\Model\Query\ContextParametersProcessorInterface;
+use Magento\Customer\Model\Group;
+use Magento\Customer\Model\Group\Resolver as CustomerGroupResolver;
+
+/**
+ * @inheritdoc
+ */
+class AddCustomerGroupToContext implements ContextParametersProcessorInterface
+{
+    /**
+     * @var CustomerGroupResolver
+     */
+    private $customerGroupResolver;
+
+    /**
+     * @param CustomerGroupResolver $customerGroupResolver
+     */
+    public function __construct(
+        CustomerGroupResolver $customerGroupResolver
+    ) {
+        $this->customerGroupResolver = $customerGroupResolver;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function execute(ContextParametersInterface $contextParameters): ContextParametersInterface
+    {
+        $customerGroupId = null;
+        $extensionAttributes = $contextParameters->getExtensionAttributesData();
+        if ($contextParameters->getUserType() === UserContextInterface::USER_TYPE_GUEST) {
+            $customerGroupId = Group::NOT_LOGGED_IN_ID;
+        } elseif (!empty($extensionAttributes) && $extensionAttributes['is_customer'] === true) {
+            $customerGroupId = $this->customerGroupResolver->resolve((int) $contextParameters->getUserId());
+        }
+        if ($customerGroupId !== null) {
+            $contextParameters->addExtensionAttribute('customer_group_id', (int) $customerGroupId);
+        }
+        return $contextParameters;
+    }
+}
diff -Nuar a/vendor/magento/module-customer-graph-ql/etc/extension_attributes.xml b/vendor/magento/module-customer-graph-ql/etc/extension_attributes.xml
index 26840551eae..b8bdb5a46ca 100644
--- a/vendor/magento/module-customer-graph-ql/etc/extension_attributes.xml
+++ b/vendor/magento/module-customer-graph-ql/etc/extension_attributes.xml
@@ -8,5 +8,6 @@
 <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Api/etc/extension_attributes.xsd">
     <extension_attributes for="Magento\GraphQl\Model\Query\ContextInterface">
         <attribute code="is_customer" type="boolean"/>
+        <attribute code="customer_group_id" type="integer"/>
     </extension_attributes>
-</config>
\ No newline at end of file
+</config>
diff -Nuar a/vendor/magento/module-customer-graph-ql/etc/graphql/di.xml b/vendor/magento/module-customer-graph-ql/etc/graphql/di.xml
index cb4ab0b7b27..9d5def55caf 100644
--- a/vendor/magento/module-customer-graph-ql/etc/graphql/di.xml
+++ b/vendor/magento/module-customer-graph-ql/etc/graphql/di.xml
@@ -17,6 +17,7 @@
         <arguments>
             <argument name="contextParametersProcessors" xsi:type="array">
                 <item name="add_user_info_to_context" xsi:type="object">Magento\CustomerGraphQl\Model\Context\AddUserInfoToContext</item>
+                <item name="add_customer_group_to_context" xsi:type="object">Magento\CustomerGraphQl\Model\Context\AddCustomerGroupToContext</item>
             </argument>
         </arguments>
     </type>
diff -Nuar a/vendor/magento/module-quote-graph-ql/Model/Resolver/CartPrices.php b/vendor/magento/module-quote-graph-ql/Model/Resolver/CartPrices.php
index 6a57a7662af..66cc9ed11ed 100644
--- a/vendor/magento/module-quote-graph-ql/Model/Resolver/CartPrices.php
+++ b/vendor/magento/module-quote-graph-ql/Model/Resolver/CartPrices.php
@@ -45,6 +45,12 @@ class CartPrices implements ResolverInterface
 
         /** @var Quote $quote */
         $quote = $value['model'];
+        /**
+         * To calculate a right discount value
+         * before calculate totals
+         * need to reset Cart Fixed Rules in the quote
+         */
+        $quote->setCartFixedRules([]);
         $cartTotals = $this->totalsCollector->collectQuoteTotals($quote);
         $currency = $quote->getQuoteCurrencyCode();
 
diff -Nuar a/vendor/magento/module-sales-rule/Model/Validator.php b/vendor/magento/module-sales-rule/Model/Validator.php
index dad35165051..1099fc7823a 100644
--- a/vendor/magento/module-sales-rule/Model/Validator.php
+++ b/vendor/magento/module-sales-rule/Model/Validator.php
@@ -292,7 +292,7 @@ class Validator extends \Magento\Framework\Model\AbstractModel
     public function processShippingAmount(Address $address)
     {
         $shippingAmount = $address->getShippingAmountForDiscount();
-        if ($shippingAmount !== null) {
+        if (!empty($shippingAmount)) {
             $baseShippingAmount = $address->getBaseShippingAmountForDiscount();
         } else {
             $shippingAmount = $address->getShippingAmount();