## Documentation Index

Access the complete documentation index at:
https://www.zoho.com/qa/books/kb/llms.txt

Use this file to discover all available documentation pages before proceeding.

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# How do I invoice a project based on milestone?

A milestone in project management acts as a key checkpoint, marking significant changes or the start of new activities within the project. Currently, Zoho Books does not support invoicing customers on a milestone basis. The supported billing methods are:

*   Fixed Cost
*   Staff Hours
*   Task Hours
*   Project Hours

[Learn more](https://www.zoho.com/qa/books/kb/time-tracking/billing-method-description.html) about project billing methods in Zoho Books.

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