# 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 #### Ruby #### Python #### PHP #### Java #### Node.js #### Go #### .NET ## 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)