> For the complete documentation index, see [llms.txt](https://docs.2checkout.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.2checkout.com/soap-api-reference/soap-api-6.0/api-requests/subscription-history/extend-a-subscription.md).

# Extend a subscription

Extend the lifetime of a subscription in the 2Checkout system on-demand. Use the **extendSubscription** method to set a new expiration deadline for a subscription.

## Extending subscriptions with addons

•       When you extend a main subscription, 2Checkout also extends its active addon subscriptions whose expiration date is the same as the main subscription's. You don't need to extend them separately.

•       You can extend an addon subscription on its own, but you cannot extend it beyond the expiration date of its main subscription, or to a date in the past.

•       The main subscription and the addon subscriptions are extended in a single operation: either all of them are updated, or none.

•       Extending a subscription does not process a payment. It only changes the expiration date.

## Request parameters

| Parameters                | Type / Description                                                                                                                                                                                                                                                                                             |
| ------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **sessionID**             | <p><strong>Required (string)</strong><br>Session identifier, the output of the <strong>Login</strong> method. Include <strong>sessionID</strong> into all your requests. 2Checkout throws an exception if the values are incorrect. The <strong>sessionID</strong> expires in <strong>10 minutes</strong>.</p> |
| **subscriptionReference** | <p><strong>Required (string)</strong><br>Unique, system-generated subscription identifier.</p>                                                                                                                                                                                                                 |
| **days**                  | <p><strong>Required (int)</strong><br>2Checkout prolongs the lifetime of a subscription using the number of days you send, adding the interval on top of the expiration date.<br><em>Hint:</em> Use a negative number to reduce the lifetime of a subscription.<br>Cannot be NULL.</p>                         |

## Response parameters

| Parameters  | Type/Description                                                               |
| ----------- | ------------------------------------------------------------------------------ |
| **Boolean** | **true** or **false** depending on whether the changes were successful or not. |

### Request sample

```php
<?php

require ('PATH_TO_AUTH');

$subscriptionReference = 'YOUR_SUBSCRIPTION_REFERENCE';
$days = 5;

try {
    $extendedSubscription = $client->extendSubscription($sessionID, $subscriptionReferenceTest, $days);
}
catch (SoapFault $e) {
    echo "extendedSubscription: " . $e->getMessage();
    exit;
}
var_dump("extendedSubscription", $extendedSubscription);
```

## Error codes

| Error code                               | Description                                                                         |
| ---------------------------------------- | ----------------------------------------------------------------------------------- |
| **INVALID\_LICENCE\_OPERATION**          | Cannot extend subscription to a date in the past.                                   |
| **INVALID\_ADDON\_EXTENSION\_OPERATION** | Addon subscription cannot be extended beyond the main subscription expiration date. |
| **INVALID\_ADDON\_EXTENSION\_OPERATION** | Addon subscription is not linked to a main subscription.                            |


---

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