---
title: "True up invoice calculation"
slug: "true-up-invoice-calculation"
updated: 2026-06-25T10:24:11Z
published: 2026-06-25T10:24:11Z
canonical: "docs.staedean.com/true-up-invoice-calculation"
---

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

# True up invoice calculation

Once the batch order is finished and the true-up calculation is executed, the material consumption details (estimate vs. actual) and price changes are visible if the user clicks the **True-up details** button in the **On-account** form (**Project management and accounting > Projects > All projects > Manage > Bill > On-account transactions**). Non-changeable items usage is identified by checking if the inventory status of the consumed material is marked as **Chargeable**.

The **Creation control** parameter (**Project management and accounting > Setup > Project management and accounting parameters > Invoice**) is controlling whether a warning or error message should be raised in case there are already upfront invoicing related milestones in the billing rule.

## Related

- [Cost calculation for upfront invoicing](/cost-calculation-for-upfront-invoicing.md)
- [Extending project-related batch order functionality](/extending-project-related-batch-order-functionality.md)
- [Life Sciences Advanced Finance Management](/life-sciences-advanced-finance-management.md)