# Removes iterations parameter for subscription schedules ## What’s new We’ve removed the [iterations](https://docs.stripe.com/api/subscription_schedules/create.md?api-version=2025-09-30.clover#create_subscription_schedule-phases-iterations) parameter because [duration](https://docs.stripe.com/api/subscription_schedules/create.md?api-version=2025-09-30.clover#create_subscription_schedule-phases-duration) replaces its functionality. ## Why is this a breaking change? We no longer support the [iterations](https://docs.stripe.com/api/subscription_schedules/create.md?api-version=2025-09-30.clover#create_subscription_schedule-phases-iterations) parameter for [Subscription Schedules](https://docs.stripe.com/api/subscription_schedules/create.md?api-version=2025-09-30). ## Impact You must update your integration to use `duration` to specify the length of a subscription schedule phase in the following API endpoints: - [Subscription Schedules Create](https://docs.stripe.com/api/subscription_schedules/create.md?api-version=2025-09-30.clover) - [Subscription Schedules Update](https://docs.stripe.com/api/subscription_schedules/update.md?api-version=2025-09-30.clover) - [Create an invoice preview](https://docs.stripe.com/api/invoices/create_preview.md?api-version=2025-09-30.clover) Using `iterations` in these endpoints now returns an error. ### Before ```curl curl https://api.stripe.com/v1/subscription_schedules \ -u "<>:" \ -H "Stripe-Version: 2025-08-27.basil" \ -d customer={{CUSTOMER_ID}} \ -d start_date=now \ -d "phases[0][items][0][price]={{PRICE_PREMIUM}" \ -d "phases[0][items][0][quantity]=1" \ -d "phases[0][iterations]=3" \ -d end_behavior=release ``` ### After ```curl curl https://api.stripe.com/v1/subscription_schedules \ -u "<>:" \ -d customer={{CUSTOMER_ID}} \ -d start_date=now \ -d "phases[0][items][0][price]={{PRICE_PREMIUM}" \ -d "phases[0][items][0][quantity]=1" \ -d "phases[0][duration][interval]=month" \ -d "phases[0][duration][interval_count]=3" \ -d end_behavior=release ``` ## Changes #### REST API | Parameter | Change | Resources or endpoints | | ------------ | ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `iterations` | Removed | [Invoice#create_preview.schedule_details.phases[]](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionSchedule#create.phases[]](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases), [SubscriptionSchedule#update.phases[]](/api/subscription_schedules/update?api-version=2025-09-30.clover#update_subscription_schedule-phases) | #### Ruby | Parameter | Change | Resources or methods | | ------------ | ------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `iterations` | Removed | [Invoice::CreatePreviewParams::ScheduleDetail::Phase](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionSchedule::CreateParams::Phase](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases), [SubscriptionSchedule::UpdateParams::Phase](/api/subscription_schedules/update?api-version=2025-09-30.clover#update_subscription_schedule-phases) | #### Python | Parameter | Change | Resources or methods | | ------------ | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `iterations` | Removed | [Invoice.CreatePreviewParamsScheduleDetailPhase](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionSchedule.CreateParamsPhase](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases), [SubscriptionSchedule.ModifyParamsPhase](/api/subscription_schedules/update?api-version=2025-09-30.clover#update_subscription_schedule-phases) | #### PHP | Parameter | Change | Resources or methods | | ------------ | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `iterations` | Removed | [Invoice.create_preview().$params.schedule_detail.phase](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionSchedule.create().$params.phase](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases), [SubscriptionSchedule.update().$params.phase](/api/subscription_schedules/update?api-version=2025-09-30.clover#update_subscription_schedule-phases) | #### Java | Parameter | Change | Resources or methods | | ------------ | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `iterations` | Removed | [InvoiceCreatePreviewParams.schedule_details.phases[]](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionScheduleCreateParams.phases[]](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases), [SubscriptionScheduleUpdateParams.phases[]](/api/subscription_schedules/update?api-version=2025-09-30.clover#update_subscription_schedule-phases) | #### Node.js | Parameter | Change | Resources or methods | | ------------ | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `iterations` | Removed | [InvoiceCreatePreviewParams.schedule_details.phases[]](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionScheduleCreateParams.phases[]](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases), [SubscriptionScheduleUpdateParams.phases[]](/api/subscription_schedules/update?api-version=2025-09-30.clover#update_subscription_schedule-phases) | #### Go | Parameter | Change | Resources or methods | | ------------ | ------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `Iterations` | Removed | [InvoiceCreatePreviewScheduleDetailsPhaseParams](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionSchedulePhaseParams](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases) | #### .NET | Parameter | Change | Resources or methods | | ------------ | ------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `Iterations` | Removed | [InvoiceScheduleDetailsPhaseOptions](/api/invoices/create_preview?api-version=2025-09-30.clover#create_invoice-schedule_details-phases), [SubscriptionSchedulePhaseOptions](/api/subscription_schedules/create?api-version=2025-09-30.clover#create_subscription_schedule-phases) | ## Upgrade #### REST API 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. If you use an SDK, upgrade to the corresponding SDK version for this API version. - If you don’t use an SDK, update your [API requests](https://docs.stripe.com/api/versioning.md) to include `Stripe-Version: 2025-09-30.clover` 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Ruby 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Ruby SDK to [v16.0.0](https://github.com/stripe/stripe-ruby/releases/tag/v16.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Python 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Python SDK to [v13.0.1](https://github.com/stripe/stripe-python/releases/tag/v13.0.1) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### PHP 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your PHP SDK to [v18.0.0](https://github.com/stripe/stripe-php/releases/tag/v18.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Java 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Java SDK to [v30.0.0](https://github.com/stripe/stripe-java/releases/tag/v30.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Node.js 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Node SDK to [v19.1.0](https://github.com/stripe/stripe-node/releases/tag/v19.1.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Go 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Go SDK to [v83.0.0](https://github.com/stripe/stripe-go/releases/tag/v83.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### .NET 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your .NET SDK to [v49.0.0](https://github.com/stripe/stripe-dotnet/releases/tag/v49.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). ## Related changes - [Promotion Codes now reference Coupons using a polymorphic field for promotions](https://docs.stripe.com/changelog/clover/2025-09-30/polymorphic-coupon.md) - [Adds the Discount source property and removes the Discount coupon property](https://docs.stripe.com/changelog/clover/2025-09-30/add-discount-source-property.md) - [Makes flexible billing mode the default for new subscriptions](https://docs.stripe.com/changelog/clover/2025-09-30/billing-mode-default-flexible.md) - [Updates computation of subscription schedule phase end date to consider billing cycle anchor changes](https://docs.stripe.com/changelog/clover/2025-09-30/billing-cycle-anchor-resets-during-phase-computation.md) - [Adds customer portal configuration trial behavior](https://docs.stripe.com/changelog/clover/2025-09-30/customer-portal-trial-behavior.md) - [Adds the ability to itemize proration discount amounts](https://docs.stripe.com/changelog/clover/2025-09-30/itemize-proration-discount-amounts.md)