--- title: Discounts API description: The API for interacting with discounts. api_version: 2025-07 api_name: checkout-ui-extensions source_url: html: >- https://shopify.dev/docs/api/checkout-ui-extensions/2025-07/target-apis/checkout-apis/discounts-api md: >- https://shopify.dev/docs/api/checkout-ui-extensions/2025-07/target-apis/checkout-apis/discounts-api.md --- Migrate to Polaris Version 2025-07 is the last API version to support React-based UI components. Later versions use [web components](https://shopify.dev/docs/api/checkout-ui-extensions/latest/polaris-web-components), native UI elements with built-in accessibility, better performance, and consistent styling with [Shopify's design system](https://shopify.dev/docs/apps/design). Check out the [migration guide](https://shopify.dev/docs/api/checkout-ui-extensions/2026-04-rc/upgrading-to-2026-04) to upgrade your extension. # Discounts API The API for interacting with discounts. ## StandardApi The base API object provided to `purchase` extension targets. * **discountAllocations** **StatefulRemoteSubscribable\** **required** Discounts that have been applied to the entire cart. * **discountCodes** **StatefulRemoteSubscribable\** **required** A list of discount codes currently applied to the checkout. ### CartDiscountAllocation ```ts CartCodeDiscountAllocation | CartAutomaticDiscountAllocation | CartCustomDiscountAllocation ``` ### CartCodeDiscountAllocation * code The code for the discount ```ts string ``` * discountedAmount The money amount that has been discounted from the order ```ts Money ``` * type The type of the code discount ```ts 'code' ``` ### Money * amount The price amount. ```ts number ``` * currencyCode The ISO 4217 format for the currency. ```ts CurrencyCode ``` ### CurrencyCode ```ts 'AED' | 'AFN' | 'ALL' | 'AMD' | 'ANG' | 'AOA' | 'ARS' | 'AUD' | 'AWG' | 'AZN' | 'BAM' | 'BBD' | 'BDT' | 'BGN' | 'BHD' | 'BIF' | 'BMD' | 'BND' | 'BOB' | 'BOV' | 'BRL' | 'BSD' | 'BTN' | 'BWP' | 'BYN' | 'BZD' | 'CAD' | 'CDF' | 'CHE' | 'CHF' | 'CHW' | 'CLF' | 'CLP' | 'CNY' | 'COP' | 'COU' | 'CRC' | 'CUC' | 'CUP' | 'CVE' | 'CZK' | 'DJF' | 'DKK' | 'DOP' | 'DZD' | 'EGP' | 'ERN' | 'ETB' | 'EUR' | 'FJD' | 'FKP' | 'GBP' | 'GEL' | 'GHS' | 'GIP' | 'GMD' | 'GNF' | 'GTQ' | 'GYD' | 'HKD' | 'HNL' | 'HRK' | 'HTG' | 'HUF' | 'IDR' | 'ILS' | 'INR' | 'IQD' | 'IRR' | 'ISK' | 'JMD' | 'JOD' | 'JPY' | 'KES' | 'KGS' | 'KHR' | 'KMF' | 'KPW' | 'KRW' | 'KWD' | 'KYD' | 'KZT' | 'LAK' | 'LBP' | 'LKR' | 'LRD' | 'LSL' | 'LYD' | 'MAD' | 'MDL' | 'MGA' | 'MKD' | 'MMK' | 'MNT' | 'MOP' | 'MRU' | 'MUR' | 'MVR' | 'MWK' | 'MXN' | 'MXV' | 'MYR' | 'MZN' | 'NAD' | 'NGN' | 'NIO' | 'NOK' | 'NPR' | 'NZD' | 'OMR' | 'PAB' | 'PEN' | 'PGK' | 'PHP' | 'PKR' | 'PLN' | 'PYG' | 'QAR' | 'RON' | 'RSD' | 'RUB' | 'RWF' | 'SAR' | 'SBD' | 'SCR' | 'SDG' | 'SEK' | 'SGD' | 'SHP' | 'SLL' | 'SOS' | 'SRD' | 'SSP' | 'STN' | 'SVC' | 'SYP' | 'SZL' | 'THB' | 'TJS' | 'TMT' | 'TND' | 'TOP' | 'TRY' | 'TTD' | 'TWD' | 'TZS' | 'UAH' | 'UGX' | 'USD' | 'USN' | 'UYI' | 'UYU' | 'UYW' | 'UZS' | 'VES' | 'VND' | 'VUV' | 'WST' | 'XAF' | 'XAG' | 'XAU' | 'XBA' | 'XBB' | 'XBC' | 'XBD' | 'XCD' | 'XDR' | 'XOF' | 'XPD' | 'XPF' | 'XPT' | 'XSU' | 'XTS' | 'XUA' | 'XXX' | 'YER' | 'ZAR' | 'ZMW' | 'ZWL' ``` ### CartAutomaticDiscountAllocation * discountedAmount The money amount that has been discounted from the order ```ts Money ``` * title The title of the automatic discount ```ts string ``` * type The type of the automatic discount ```ts 'automatic' ``` ### CartCustomDiscountAllocation * discountedAmount The money amount that has been discounted from the order ```ts Money ``` * title The title of the custom discount ```ts string ``` * type The type of the custom discount ```ts 'custom' ``` ### CartDiscountCode * code The code for the discount ```ts string ``` ## CheckoutApi The API object provided to `purchase.checkout` extension targets. * **applyDiscountCodeChange** **(change: DiscountCodeChange) => Promise\** **required** Performs an update on the discount codes. It resolves when the new discount codes have been negotiated and results in an update to the value retrieved through the [`discountCodes`](https://shopify.dev/docs/api/checkout-ui-extensions/apis/discounts#standardapi-propertydetail-discountcodes) property. **Caution:** \> See \security considerations\ if your extension retrieves discount codes through a network call. **Note:** This method will return an error if the \cart instruction\ \\discounts.can\Update\Discount\Codes\\ is false, or the buyer is using an accelerated checkout method, such as Apple Pay, Google Pay, or Meta Pay. ### DiscountCodeChange ```ts DiscountCodeAddChange | DiscountCodeRemoveChange ``` ### DiscountCodeAddChange * code The code for the discount (case-insensitive) ```ts string ``` * type The type of the \`DiscountCodeChange\` API. ```ts 'addDiscountCode' ``` ### DiscountCodeRemoveChange * code The code for the discount (case-insensitive) ```ts string ``` * type The type of the \`DiscountCodeChange\` API. ```ts 'removeDiscountCode' ``` ### DiscountCodeChangeResult ```ts DiscountCodeChangeResultSuccess | DiscountCodeChangeResultError ``` ### DiscountCodeChangeResultSuccess * type Indicates that the discount code change was applied successfully. ```ts 'success' ``` ### DiscountCodeChangeResultError * message A message that explains the error. This message is useful for debugging. It is \*\*not\*\* localized, and therefore should not be presented directly to the buyer. ```ts string ``` * type Indicates that the discount code change failed. ```ts 'error' ``` ## use​Apply​Discount​Code​Change() Returns a function to add or remove discount codes. ### Returns * **(change: DiscountCodeChange) => Promise\** ### DiscountCodeChange ```ts DiscountCodeAddChange | DiscountCodeRemoveChange ``` ### DiscountCodeAddChange * code The code for the discount (case-insensitive) ```ts string ``` * type The type of the \`DiscountCodeChange\` API. ```ts 'addDiscountCode' ``` ### DiscountCodeRemoveChange * code The code for the discount (case-insensitive) ```ts string ``` * type The type of the \`DiscountCodeChange\` API. ```ts 'removeDiscountCode' ``` ### DiscountCodeChangeResult ```ts DiscountCodeChangeResultSuccess | DiscountCodeChangeResultError ``` ### DiscountCodeChangeResultSuccess * type Indicates that the discount code change was applied successfully. ```ts 'success' ``` ### DiscountCodeChangeResultError * message A message that explains the error. This message is useful for debugging. It is \*\*not\*\* localized, and therefore should not be presented directly to the buyer. ```ts string ``` * type Indicates that the discount code change failed. ```ts 'error' ``` ## use​Discount​Allocations() Returns the current discount allocations applied to the cart. ### Returns * **CartDiscountAllocation\[]** ### CartDiscountAllocation ```ts CartCodeDiscountAllocation | CartAutomaticDiscountAllocation | CartCustomDiscountAllocation ``` ### CartCodeDiscountAllocation * code The code for the discount ```ts string ``` * discountedAmount The money amount that has been discounted from the order ```ts Money ``` * type The type of the code discount ```ts 'code' ``` ### Money * amount The price amount. ```ts number ``` * currencyCode The ISO 4217 format for the currency. ```ts CurrencyCode ``` ### CurrencyCode ```ts 'AED' | 'AFN' | 'ALL' | 'AMD' | 'ANG' | 'AOA' | 'ARS' | 'AUD' | 'AWG' | 'AZN' | 'BAM' | 'BBD' | 'BDT' | 'BGN' | 'BHD' | 'BIF' | 'BMD' | 'BND' | 'BOB' | 'BOV' | 'BRL' | 'BSD' | 'BTN' | 'BWP' | 'BYN' | 'BZD' | 'CAD' | 'CDF' | 'CHE' | 'CHF' | 'CHW' | 'CLF' | 'CLP' | 'CNY' | 'COP' | 'COU' | 'CRC' | 'CUC' | 'CUP' | 'CVE' | 'CZK' | 'DJF' | 'DKK' | 'DOP' | 'DZD' | 'EGP' | 'ERN' | 'ETB' | 'EUR' | 'FJD' | 'FKP' | 'GBP' | 'GEL' | 'GHS' | 'GIP' | 'GMD' | 'GNF' | 'GTQ' | 'GYD' | 'HKD' | 'HNL' | 'HRK' | 'HTG' | 'HUF' | 'IDR' | 'ILS' | 'INR' | 'IQD' | 'IRR' | 'ISK' | 'JMD' | 'JOD' | 'JPY' | 'KES' | 'KGS' | 'KHR' | 'KMF' | 'KPW' | 'KRW' | 'KWD' | 'KYD' | 'KZT' | 'LAK' | 'LBP' | 'LKR' | 'LRD' | 'LSL' | 'LYD' | 'MAD' | 'MDL' | 'MGA' | 'MKD' | 'MMK' | 'MNT' | 'MOP' | 'MRU' | 'MUR' | 'MVR' | 'MWK' | 'MXN' | 'MXV' | 'MYR' | 'MZN' | 'NAD' | 'NGN' | 'NIO' | 'NOK' | 'NPR' | 'NZD' | 'OMR' | 'PAB' | 'PEN' | 'PGK' | 'PHP' | 'PKR' | 'PLN' | 'PYG' | 'QAR' | 'RON' | 'RSD' | 'RUB' | 'RWF' | 'SAR' | 'SBD' | 'SCR' | 'SDG' | 'SEK' | 'SGD' | 'SHP' | 'SLL' | 'SOS' | 'SRD' | 'SSP' | 'STN' | 'SVC' | 'SYP' | 'SZL' | 'THB' | 'TJS' | 'TMT' | 'TND' | 'TOP' | 'TRY' | 'TTD' | 'TWD' | 'TZS' | 'UAH' | 'UGX' | 'USD' | 'USN' | 'UYI' | 'UYU' | 'UYW' | 'UZS' | 'VES' | 'VND' | 'VUV' | 'WST' | 'XAF' | 'XAG' | 'XAU' | 'XBA' | 'XBB' | 'XBC' | 'XBD' | 'XCD' | 'XDR' | 'XOF' | 'XPD' | 'XPF' | 'XPT' | 'XSU' | 'XTS' | 'XUA' | 'XXX' | 'YER' | 'ZAR' | 'ZMW' | 'ZWL' ``` ### CartAutomaticDiscountAllocation * discountedAmount The money amount that has been discounted from the order ```ts Money ``` * title The title of the automatic discount ```ts string ``` * type The type of the automatic discount ```ts 'automatic' ``` ### CartCustomDiscountAllocation * discountedAmount The money amount that has been discounted from the order ```ts Money ``` * title The title of the custom discount ```ts string ``` * type The type of the custom discount ```ts 'custom' ``` ## use​Discount​Codes() Returns the current discount codes applied to the cart. ### Returns * **CartDiscountCode\[]** ### CartDiscountCode * code The code for the discount ```ts string ``` ## Related [Reference - Targets](https://shopify.dev/docs/api/checkout-ui-extensions/targets) [Reference - Components](https://shopify.dev/docs/api/checkout-ui-extensions/components) [Reference - Configuration](https://shopify.dev/docs/api/checkout-ui-extensions/configuration) [Learn - Tutorials](https://shopify.dev/apps/checkout)