> ## Documentation Index
> Fetch the complete documentation index at: https://support.servicem8.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How is the invoice date set in ServiceM8?

In ServiceM8, an invoice due date is calculated from when the job is marked **Completed**, or from the date the first invoice PDF was produced on the job, whichever happens first.

## Related resources

* [How to change an invoice date](/help-center/desktop/invoicing/how-to-change-an-invoice-date)