--- title: Promotional mechanics management description: how to manage the refund and exchange of promotional mechanics applied during the sale --- [Skip to content](https://help.ifreturns.com/en/knowledge-center/promotional-mechanics-management#main-content) English Show submenu for translations [Customer portal](https://help.ifreturns.com/tickets-view?hsLang=en) ![Logo Negativo-4.png\]](https://help.ifreturns.com/hs-fs/hubfs/Logo%20Negativo-4.png?height=40&name=Logo%20Negativo-4.png) Open main navigation Close main navigation - English Show submenu for translations - [Customer portal](https://help.ifreturns.com/tickets-view) - Go to ifreturns.com Go to ifreturns.com How can we help? - There are no suggestions because the search field is empty. 1. [Knowledge Center](https://help.ifreturns.com/en/knowledge-center?hsLang=en) 2. [Getting Started](https://help.ifreturns.com/en/knowledge-center/getting-started?hsLang=en) 3. [Promotions Management](https://help.ifreturns.com/en/knowledge-center/getting-started?hsLang=en#promotions-management) # Promotional mechanics management ## This article explains how to calculate refundable quantities per line item when different types of promotions are applied in Shopify, with a focus on Buy X Get Y (BuyXGetY) discounts. ### **Standard Promotions Management – Shopify** This article explains how to calculate **refundable quantities per line item** when different types of promotions are applied in Shopify, with a focus on **Buy X Get Y (BuyXGetY)** discounts. --- #### **Default Behavior (Standard Case)** ### **Mandatory Return Policy for BuyXGetY** By default, when a **BuyXGetY promotion** is applied: > ✅ **Customers must return all items included in the promotion.** This means: - Refunds are **not calculated per individual item**. - The promotion is treated as a **bundle**. - Partial returns are **not allowed**. --- #### **Optional Configuration: Discount Redistribution** The cases described below apply **only if an optional configuration is enabled**, allowing: > 🔄 **Proportional redistribution of discounts across items** This enables: - Partial returns of items within a BuyXGetY promotion - Fair allocation of discounts per item - Calculation of **refundable amounts per line item** --- #### **General Principle (When Redistribution is Enabled)** 1. Identify all items belonging to the BuyXGetY promotion. 2. Calculate the **total price** of those items. 3. Calculate the **total discount applied** (including all promotions affecting those items). 4. Determine each item's **weight (proportion)**. 5. Distribute the total discount proportionally. 6. Subtract the allocated discount to get the **refundable amount per item**. --- ### **CASE I: Only BuyXGetY Discounts Applied** > ⚠️ This case represents the **standard scenario**, but redistribution applies **only if partial returns are allowed via configuration**. ### **Scenario** - Only BuyXGetY promotion is applied. - No additional order-level or line-level discounts. --- ### **Order Details** - **Item 1**: Price = 50€ Discount = 0€ - **Item 2**: Price = 30€ Discount = 30€ --- ### **Step 1: Identify Promotion Items** All items belong to the BuyXGetY promotion. --- ### **Step 2: Calculate Totals** - Total price = 80€ - Total discount = 30€ --- ### **Step 3: Calculate Weight** - Item 1: 50 / 80 = 0.625 - Item 2: 30 / 80 = 0.375 --- ### **Step 4: Allocate Discount** - Item 1: 0.625 × 30 = 18.75€ - Item 2: 0.375 × 30 = 11.25€ --- ### **Step 5: Refundable Amount** - Item 1: 50 − 18.75 = **31.25€** - Item 2: 30 − 11.25 = **18.75€** --- ### **CASE II: BuyXGetY + Order-Level Discount + Non-Promo Items** ### **Scenario** - BuyXGetY promotion applied - Additional **order-level discount** - Some items are **not part of the promotion** --- ### **Order Details** - **Item 1** (BuyXGetY + Order Discount): Price = 50€ Discount = 10€ - **Item 2** (BuyXGetY + Order Discount): Price = 30€ Discount = 30€ - **Item 3** (Only Order Discount): Price = 50€ Discount = 10€ --- ### **Step 1: Select Promotion Items** Items included: Item 1 and Item 2 --- ### **Step 2: Totals (Promo Items Only)** - Total price = 80€ - Total discount = 40€ --- ### **Step 3: Weight** - Item 1: 0.625 - Item 2: 0.375 --- ### **Step 4: Allocate Discount** - Item 1: 25€ - Item 2: 15€ --- ### **Step 5: Refundable Amount** - Item 1: **25€** - Item 2: **15€** --- ### **Non-Promo Item** - Item 3: 50 − 10 = **40€** --- ### **CASE III: BuyXGetY + Line Item Discount** ### **Scenario** - BuyXGetY promotion applied - Additional **line-level discount** on one item --- ### **Order Details** - **Item 1**: Price = 80€ Discount = 0€ - **Item 2**: Price = 60€ Discount = 60€ --- ### **Step 1: Promotion Items** Both items belong to BuyXGetY --- ### **Step 2: Totals** - Total price = 140€ - Total discount = 60€ --- ### **Step 3: Weight** - Item 1: 0.57 - Item 2: 0.43 --- ### **Step 4: Allocate Discount** - Item 1: 34.28€ - Item 2: 25.72€ --- ### **Step 5: Refundable Amount** - Item 1: **45.72€** - Item 2: **34.28€** --- ### **Summary** | Scenario | Behavior | | --- | --- | | Default (no configuration) | All BuyXGetY items must be returned together | | Redistribution enabled | Discounts are proportionally allocated | | Mixed promotions | Include all discounts affecting promo items | | Non-promo items | Calculated independently | - [Inquiries or Incidents](https://help.ifreturns.com/en/knowledge-center/inquiries-or-incidents?hsLang=en) - [Getting Started](https://help.ifreturns.com/en/knowledge-center/getting-started?hsLang=en#main-content) - [Portal Overview](https://help.ifreturns.com/en/knowledge-center/getting-started?hsLang=en#portal-overview) - [Analytics](https://help.ifreturns.com/en/knowledge-center/getting-started?hsLang=en#analytics) - [In app configurations](https://help.ifreturns.com/en/knowledge-center/getting-started?hsLang=en#in-app-configurations) - 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