How to Use Odoo's Project Module to Manage Client Work End to End
For service businesses — agencies, consultancies, IT firms, engineering companies — the gap between closing a deal and delivering profitably is where most of the risk lives. Projects go over budget. Timelines slip. Billable hours don't get logged. Invoicing is delayed because no one has a clean picture of what was delivered. Odoo's Project module, combined with Timesheets and Invoicing, is built to close that gap.
Project Structure in Odoo
In Odoo, a project is a container for tasks. Each project can have its own stages, team members, deadlines, and budget. Tasks within a project can be assigned to specific people, given due dates, tagged with categories, and linked to a customer or a sales order.
You can view projects in Kanban, list, Gantt, or calendar view depending on what your team finds most useful. For agencies managing multiple client projects simultaneously, the Kanban view gives a fast overview of where everything stands. For project managers who need to plan timelines, the Gantt chart shows dependencies and critical paths.
Task Management and Collaboration
Each task in Odoo has a dedicated space for descriptions, attachments, comments, and time logs. Team members can mention each other, leave notes, and update task status without needing to use a separate communication tool. Customers can also be given portal access to view project progress and upload documents — a feature that's particularly useful for client-facing work.
Tasks can be created manually, imported from a template, or generated automatically when a sale is confirmed — so your delivery team knows about new work the moment it's won.
Timesheets: Capturing Billable Hours
Odoo's Timesheet module integrates directly with Project. Team members log time against specific tasks, and those time logs flow automatically into billing calculations. You can set projects as time-and-materials (billable at an hourly rate), fixed-price (bill a lump sum regardless of hours), or a combination.
For managers, timesheet data feeds directly into profitability reporting. You can see how many hours were budgeted versus logged on any project, identify where scope creep is happening, and make better estimates on future engagements.
From Project to Invoice
This is where Odoo saves service businesses real time and money. Once a project reaches a billing milestone — or once a billing cycle ends — you can generate an invoice directly from the project or the linked sales order. If the project is time-and-materials, Odoo calculates the invoice amount from logged timesheets. If it's fixed-price, you invoice according to the agreed milestone structure.
The invoice is linked to the project, so your accounts receivable team can always see which invoices relate to which client and project without digging through email.
Profitability and Forecasting
Odoo's project profitability view shows you revenue versus cost for each project in real time. Costs include employee time (valued at their cost rate), expenses, and any purchased services. Revenue reflects invoiced amounts plus unbilled work in progress. This gives project managers and finance teams a shared, accurate view of how each engagement is tracking — not just whether tasks are getting done, but whether the project is making money.
Who Should Use This Setup
Any service business that sells time, expertise, or deliverables and needs to connect that work to invoicing will benefit from Odoo's Project and Timesheet modules. The setup works especially well when it's connected to Odoo CRM (so won deals automatically create projects) and Odoo Accounting (so invoices flow directly into your books).
At Custom Pixel Design, we implement this full workflow regularly for agencies, IT firms, and consulting businesses. If you want to see a demo of how it would work for your specific delivery model, reach out.