---
title: CartDiscountAllocation - Storefront API
description: >
  A common interface for querying discount allocations regardless of how the
  discount was applied
  ([automatic](https://help.shopify.com/manual/discounts/discount-methods/automatic-discounts),
  [code](https://help.shopify.com/manual/discounts/discount-methods/discount-codes),
  or custom). Each implementation represents a different discount source.


  Tracks how a discount distributes across [cart
  lines](/docs/api/storefront/2026-01/objects/CartLine). Each allocation
  includes the
  [`CartDiscountApplication`](/docs/api/storefront/2026-01/objects/CartDiscountApplication)
  details, the discounted amount, and whether the discount targets line items or
  shipping.
api_version: 2026-01
api_name: storefront
type: interface
api_type: graphql
source_url:
  html: >-
    https://shopify.dev/docs/api/storefront/latest/interfaces/CartDiscountAllocation
  md: >-
    https://shopify.dev/docs/api/storefront/latest/interfaces/CartDiscountAllocation.md
---

# Cart​Discount​Allocation

interface

A common interface for querying discount allocations regardless of how the discount was applied ([automatic](https://help.shopify.com/manual/discounts/discount-methods/automatic-discounts), [code](https://help.shopify.com/manual/discounts/discount-methods/discount-codes), or custom). Each implementation represents a different discount source.

Tracks how a discount distributes across [cart lines](https://shopify.dev/docs/api/storefront/2026-01/objects/CartLine). Each allocation includes the [`CartDiscountApplication`](https://shopify.dev/docs/api/storefront/2026-01/objects/CartDiscountApplication) details, the discounted amount, and whether the discount targets line items or shipping.

## Fields

* discount​Application

  [Cart​Discount​Application!](https://shopify.dev/docs/api/storefront/latest/objects/CartDiscountApplication)

  non-null

  The discount that have been applied on the cart line.

* discounted​Amount

  [Money​V2!](https://shopify.dev/docs/api/storefront/latest/objects/MoneyV2)

  non-null

  The discounted amount that has been applied to the cart line.

* target​Type

  [Discount​Application​Target​Type!](https://shopify.dev/docs/api/storefront/latest/enums/DiscountApplicationTargetType)

  non-null

  The type of line that the discount is applicable towards.

***

## Types implemented in

* [Cart​Automatic​Discount​Allocation](https://shopify.dev/docs/api/storefront/latest/objects/CartAutomaticDiscountAllocation)

  OBJECT

  A discount allocation [that applies automatically](https://help.shopify.com/manual/discounts/discount-methods/automatic-discounts) to a cart line when configured conditions are met. Unlike [`CartCodeDiscountAllocation`](https://shopify.dev/docs/api/storefront/2026-01/objects/CartCodeDiscountAllocation), automatic discounts don't require customers to enter a code.

  * discount​Application

    [Cart​Discount​Application!](https://shopify.dev/docs/api/storefront/latest/objects/CartDiscountApplication)

    non-null

    The discount that have been applied on the cart line.

  * discounted​Amount

    [Money​V2!](https://shopify.dev/docs/api/storefront/latest/objects/MoneyV2)

    non-null

    The discounted amount that has been applied to the cart line.

  * target​Type

    [Discount​Application​Target​Type!](https://shopify.dev/docs/api/storefront/latest/enums/DiscountApplicationTargetType)

    non-null

    The type of line that the discount is applicable towards.

  * title

    [String!](https://shopify.dev/docs/api/storefront/latest/scalars/String)

    non-null

    The title of the allocated discount.

* [Cart​Code​Discount​Allocation](https://shopify.dev/docs/api/storefront/latest/objects/CartCodeDiscountAllocation)

  OBJECT

  A discount allocation applied to a cart line when a customer enters a [discount code](https://help.shopify.com/manual/discounts/discount-methods/discount-codes).

  * code

    [String!](https://shopify.dev/docs/api/storefront/latest/scalars/String)

    non-null

    The code used to apply the discount.

  * discount​Application

    [Cart​Discount​Application!](https://shopify.dev/docs/api/storefront/latest/objects/CartDiscountApplication)

    non-null

    The discount that have been applied on the cart line.

  * discounted​Amount

    [Money​V2!](https://shopify.dev/docs/api/storefront/latest/objects/MoneyV2)

    non-null

    The discounted amount that has been applied to the cart line.

  * target​Type

    [Discount​Application​Target​Type!](https://shopify.dev/docs/api/storefront/latest/enums/DiscountApplicationTargetType)

    non-null

    The type of line that the discount is applicable towards.

* [Cart​Custom​Discount​Allocation](https://shopify.dev/docs/api/storefront/latest/objects/CartCustomDiscountAllocation)

  OBJECT

  The discounts automatically applied to the cart line based on prerequisites that have been met.

  * discount​Application

    [Cart​Discount​Application!](https://shopify.dev/docs/api/storefront/latest/objects/CartDiscountApplication)

    non-null

    The discount that have been applied on the cart line.

  * discounted​Amount

    [Money​V2!](https://shopify.dev/docs/api/storefront/latest/objects/MoneyV2)

    non-null

    The discounted amount that has been applied to the cart line.

  * target​Type

    [Discount​Application​Target​Type!](https://shopify.dev/docs/api/storefront/latest/enums/DiscountApplicationTargetType)

    non-null

    The type of line that the discount is applicable towards.

  * title

    [String!](https://shopify.dev/docs/api/storefront/latest/scalars/String)

    non-null

    The title of the allocated discount.

***

##### Variables

```json
{
	"discountApplication": "",
	"discountedAmount": "",
	"targetType": ""
}
```

##### Schema

```graphql
interface CartDiscountAllocation {
  discountApplication: CartDiscountApplication!
  discountedAmount: MoneyV2!
  targetType: DiscountApplicationTargetType!
}
```