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

# Account billing

## Add, view, or change payment details

<Note>
  The following information applies only to Unstructured **Pay-As-You-Go** accounts.

  To add, view, or change payment details for an Unstructured **Business** account, contact your
  Unstructured Account Executive (AE). If you do not know who your assigned AE is,
  email Unstructured Support at [support@unstructured.io](mailto:support@unstructured.io).
</Note>

1. If you are not already signed in, sign in to your Unstructured account.
2. On the sidebar, click your user icon, and then click **Account Settings**.
3. In the top navigation bar, click the **Billing** tab.
4. Click **Manage Payment**; follow the on-screen instructions to add, view, or change your payment details; and then click **Save card**.

## View billing details

<Note>
  The following information applies only to Unstructured **Pay-As-You-Go** accounts.

  To view billing details for an Unstructured **Business** account, contact your
  Unstructured Account Executive (AE). If you do not know who your assigned AE is,
  email Unstructured Support at [support@unstructured.io](mailto:support@unstructured.io).
</Note>

1. If you are not already signed in, sign in to your Unstructured account.
2. On the sidebar, click your user icon, and then click **Account Settings**.
3. In the top navigation bar, click the **Billing** tab. Your account's billing details are displayed.

## How is pay-per-page billing calculated?

Unstructured calculates a page as follows:

* For these file types, a page is a page, slide, or image: `.pdf`, `.pptx`, and `.tiff`.
* For `.docx` files that have page metadata, Unstructured calculates the number of pages based on that metadata.
* For all other file types, Unstructured calculates the number of pages as the file's size divided by 100 KB.
* For non-file data, Unstructured calculates a page as 100 KB of incoming data to be processed.

The **Billing** tab shows your account's current billing rate per page.

To complete usage-related tasks in your account, see [Account usage](/ui/account/usage).