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

# Managing Add-Ons

Add-ons allow you to offer optional products or services that Customers can purchase in addition to their Subscription.

## Creating an Add-on

To create an Add-on, navigate to Product Catalog > Add-ons and click New Add-on. Add-ons can be created from already existing Products or from scratch.

When configuring an Add-on, you can define the following options:

* **Self-service:** When enabled, Customers can subscribe to the Add-on directly from the Customer Portal without any intervention from an Account Manager.
* **Instances:** Defines how many times the same Add-on can be subscribed to by a Customer. For example, an Add-on with one instance can only be purchased once, while a higher limit allows Customers to subscribe multiple times.

## Assigning Add-ons to Plans

Once an Add-on has been created, it must be linked to one or more Plans. To do so, open the desired Plan and click "Add an Add-on".

## Managing Add-ons on a Subscription

If the Add-on is configured as **Self-service**, Customers subscribed to that Plan will be able to purchase it directly from the Customer Portal. in this case, the associated subscription is automatically updated.

Regardless of whether **Self-service** is enabled, Account Managers can always manage Add-ons on behalf of their Customers. Add-ons can be assigned when creating a Subscription or later by amending an existing Subscription.