Odoo Projects, Netherlands

Hourly, fixed price and secondment contracts in Odoo

Dutch service firms sell work in several ways at once. An engineering bureau may quote a fixed price for a feasibility study and bill the follow-up design by the hour. An IT company may place specialists at a client for months, billing every hour against a framework agreement and purchase order. An installation company may combine a fixed contract price with hourly extra work.

In Odoo, the service product decides the billing behavior. Products can invoice on ordered quantity for fixed prices, on timesheet hours for time and materials, or on milestones reached. Confirming an order can start a new project, add a task to an existing one or copy a template. Every contract type you use gets its own product, and each one is run from order to draft invoice in a test database first.

Secondment needs particular care. Hours are usually billed per placement, at a rate tied to the consultant and the client, quoting the client's purchase order reference on each invoice. I design that with one project or task per placement and price rules your finance team can maintain. Extra work on fixed contracts becomes a separate order line, so it is billed on its own trigger. The Odoo Projects page covers the general product model.

Client-approved hours and timesheet discipline

Many Dutch clients, especially larger companies and public bodies, want to approve hours before they accept an invoice. Without a clear approval cycle, invoices wait for emails and spreadsheets, and disputes surface weeks later.

I design a weekly cycle. Staff log hours against tasks or placements by a fixed day. Project leads review them internally. Where the client must sign off, they receive either portal access to the relevant timesheets or a statement exported from Odoo, depending on what your version supports and what the client accepts. Only approved hours are invoiced. Timesheet validation in Odoo has usually come with Enterprise, so before the policy relies on it, Odoo or the implementer should say what your release offers.

Cost rates complete the picture. Each employee needs an hourly cost, calculated by your controller, so timesheets carry real labor cost into the project. Freelancers who invoice you are handled through supplier bills linked to the project. The rules on engaging self-employed professionals in the Netherlands have been under close scrutiny, and how you assess and document those relationships is a question for your advisor; Odoo simply records the contract and the cost. Margin per project then comes from the analytic account behind it, reviewed monthly. See project costing for the method.

Installers, service engineers and field work

Dutch installation companies working on heating, cooling, electrical, solar and building automation systems send engineers to sites daily. They need planning by engineer and skill, worksheets completed on site, materials recorded from van stock and a customer signature that triggers invoicing.

Odoo Field Service builds on projects and tasks to do this, with scheduling, worksheet templates, materials used and signatures flowing into invoices. Field Service is usually licensed with Enterprise and gains or changes features between releases; the implementer should state what your version covers. I test it with one of your real job types, including a job that runs over several visits and one with extra materials.

Van stock connects to Odoo Inventory in the Netherlands: each van becomes a location, and materials used on a job reduce it. That only works if engineers record usage consistently, so I check whether the effort is worth it for your volume.

Installation work for construction projects may involve rules on chain liability for wage taxes and the VAT reverse charge between contractors and subcontractors. Your accountant determines whether either applies. My job is to make sure Odoo's taxes, invoice texts and subcontractor records support the procedure they define. For wider field service choices, see field service.

Margins, invoicing and the link to Dutch accounting

A Dutch director's first project question is usually whether the job makes money. Odoo's answer is analytic accounting. Income, hours valued at cost, expense claims and purchase invoices all land on the project's analytic account, and a second analytic dimension can roll projects up into business units or service lines, consistent with how Odoo Accounting in the Netherlands is configured.

Unbilled work matters as much as invoiced revenue. Odoo shows amounts still to invoice per project, and I set up a monthly review where project leads explain gaps between hours logged, hours approved and hours billed. That review, held from Odoo data rather than spreadsheets, is often what turns the system into a management tool.

Invoices leave Odoo with the taxes set by the Dutch localization and your accountant's configuration. Dutch public bodies want e-invoices, very often through Peppol, and Odoo's way of reaching that network varies by release, edition and hosting, so I test sending with a real public sector customer record. Customer data such as KvK number, VAT number and purchase order references must be complete on the project's sales order, which I make mandatory where practical. Retainers and recurring service fees usually point to the Subscriptions app, normally an Enterprise item; the implementer should confirm that for your version.

Edition, migration and where Odoo Projects stops

Community gives you projects, tasks, stages and simple hour logging. Approval of timesheets, Gantt planning, the Planning and Helpdesk apps, Field Service and Subscriptions have normally been reserved for Enterprise. For plain hourly billing Community may be enough, and I write out every function you would forgo, checked by Odoo or the implementer against your version. Hosting matters as well: custom modules, for example for a client approval portal, rule out Odoo Online.

Migration should be selective. Close and invoice finished work in the old system, then move active projects, open tasks, placements and agreed unbilled balances. Old hour lines rarely matter in the new system; one total per running project normally covers the opening position.

Odoo Projects is not ideal for every Dutch firm. Large construction and civil engineering contractors with formal cost estimates, budget codes and progress valuations usually need a construction ERP. Staffing agencies with high-volume payroll-driven billing may need specialist software. Practices that only want task tracking can use a lighter tool. I say so before you commit. See professional services, best ERP for professional services and my Odoo consultant in the Netherlands page for the edition and partner questions.