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# How to Bill a Long Project by Progress
- URL: https://blog.jestor.com/bill-a-long-project-by-progress/
- Published: 2026-09-17T22:40:28.000Z
- Updated: 2026-09-17T22:40:28.000Z
- Author: Bruno Bannach

To **bill a project by progress**, each billing event has to reference evidenced work. Progress claimed rather than evidenced is where billing disputes come from.

## Why progress billing causes disputes

Both sides remember the agreement differently.

- Progress estimated rather than derived from completed stages
- No evidence attached to a billing milestone
- Client and provider disagreeing on what was completed
- Invoices raised before the work qualified

## What each billing event needs

- **A defined milestone**, agreed in advance
- **Completion evidence** — a checklist and attachments
- **Derived progress**, from stages rather than estimates
- **Approval**, before the billing event is raised
- **A link to the entry** once it reaches the **ERP**

## How to set it up in Jestor

1. Define project stages in **Jestor** on the **Gantt** view, each a potential milestone.
2. Add checklists inside stages so completion is derived rather than estimated.
3. Attach evidence to the stage — photos, documents, or sign-off.
4. Route the billing event through approval before it is raised.
5. Post the approved entry to the ERP through the native integration.

## Why Jestor is the best complement to Omie for progress billing

The ERP issues the invoice and holds the accounting; Jestor holds the milestone definition, the evidence, and the approval that justify raising it.

Because progress is derived from completed checklist items inside stages, the figure behind a billing event is checkable rather than asserted.

## Frequently Asked Questions

### How is progress derived?

From completed checklist items inside stages. See [jestor.com](https://jestor.com/?ref=blog.jestor.com).

### Should evidence be attached?

Yes, to the stage it relates to.

### Who issues the invoice?

The ERP, after approval here.

## Video Tutorial: Step by Step

Check out other practical tutorials on the Jestor YouTube channel.

## Get to know Jestor

With **Jestor**, you can automate workflows, connect teams, and build internal systems your way — all without code and powered by **AI**. Discover Jestor at [jestor.com](https://jestor.com/?ref=blog.jestor.com) and see how to take your company's operations to a new level of efficiency and control.