> ## Documentation Index
> Fetch the complete documentation index at: https://docs.slm.m1amdocs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Subscription Upgrades & Downgrades

* **[Enable Subscribers to Upgrade Subscriptions](../topics/2410_r_upgradeSubscriptions#)**\
  You can enable subscribers to upgrade their current subscriptions to superior subscriptions (as defined by you) through your self-care portal, with the upgrade taking effect immediately. To support this functionality, you must use the Subscribe APIs.
* **[Enable Subscribers to Upgrade Subscriptions Using a Coupon](../topics/2411_r_upgradeSubscriptionCoupon#)**\
  You can enable subscribers to redeem a coupon for a discounted upgrade to a superior subscription (as defined by you) using your self-care portal, with the upgrade taking effect immediately. To enable this functionality, you must use the Subscribe APIs.
* **[Enable Subscribers to Upgrade Subscriptions with Promotional Rate](../topics/2412_r_upgradeSubscriptionsPromo#)**\
  You can enable your subscribers to upgrade their existing subscriptions to superior subscriptions (as defined by you) at a promotional rate using your self-care portal, with the upgrade taking effect immediately. To support this functionality, you must use the Subscribe APIs.
* **[Enable Subscribers to Downgrade Subscriptions](../topics/2413_r_downgradeSubscriptions#)**\
  You can enable subscribers to downgrade their current Subscriptions to lower Subscriptions (as defined by you) using your self-care portal, with the downgrade taking effect at the end of the current billing period. To support this functionality, you must use the Subscribe APIs.

**Parent topic:**[Subscriber Management](../topics/tp_subscriberManagement)


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