Construction management software in Saudi Arabia has to cost every project, control subcontractors and site stock, and issue ZATCA-compliant progress invoices with 15% VAT. Odoo ERP covers most of this with standard apps: Project, Purchase, Inventory, Maintenance, Timesheets and Accounting with the Saudi localization. Bills of quantities and detailed progress certificates usually need extra configuration, a third-party module or custom development.
Summary answer: Odoo can run the business side of a Saudi contracting company in one database. Each project gets an analytic account, so labor from timesheets, materials from site stock, subcontractor bills and equipment costs all land against the same job, and an analytic budget shows committed and actual spend. Client billing works through milestone or down payment invoices from the Sales app, and the Saudi localization sends every tax invoice to ZATCA for clearance once your business is in Phase 2. Odoo’s Saudi documentation also describes how to show retention on invoices. Gaps are real, though. Odoo has no standard multi-level bill of quantities with rate analysis, no full subcontractor certificate workflow and no critical-path scheduling engine like dedicated planning tools. Most firms close these gaps with configuration, a vetted app or a small custom module, and keep specialist tools for scheduling or BIM.
What a Saudi contractor needs from construction management software
Many contracting firms are not short of software. They are short of one version of the numbers. The estimate lives in Excel, purchase orders in one system, timesheets on paper and invoices in an accounting package. By the time the project manager sees the real margin, the job is half built.
A useful system for a Saudi contractor should do six things well:
- Cost every project with labor, materials, subcontractors and equipment in one place.
- Compare budget with committed and actual cost while there is still time to act.
- Control purchasing and subcontractors, with approvals and a clear link to each project.
- Track materials on site, not just in the main store.
- Bill clients by progress, including advances, variations and retention.
- Meet ZATCA e-invoicing and VAT rules on every invoice, credit note and debit note.
If you are still comparing platforms, our guide to choosing ERP software in Saudi Arabia covers the wider shortlist. This article looks at how Odoo handles construction specifically, and where it does not.
What Odoo covers for construction, and what needs extra work
Odoo lists construction as an industry, with a general contractor solution built on CRM, Sales, Purchase, Project, Timesheets and Invoicing. The table below is our honest view of each need.
| Need | Odoo app | Status |
|---|---|---|
| Project costing and profitability | Project, Accounting (analytic accounts) | Standard |
| Project budgets with commitments | Accounting (analytic budgets) | Standard, needs setup |
| Labor cost from timesheets | Timesheets, Employees | Standard |
| Bill of quantities with rate analysis | Sales quotations, Spreadsheet | Configuration, third-party app or custom module |
| Subcontractor orders and bills | Purchase, Accounting | Standard |
| Subcontractor progress certificates | Purchase | Configuration or custom module |
| Milestone and down payment billing | Sales, Project | Standard |
| Retention on client invoices | Accounting, Saudi localization | Configuration (documented by Odoo) |
| Site stores and material issues | Inventory | Standard, needs setup |
| Equipment maintenance | Maintenance, Fleet | Standard |
| ZATCA e-invoicing and VAT | Accounting, Saudi localization | Standard |
| Critical-path scheduling, BIM | None | Use a specialist tool |
Project costing with analytic accounts and budgets
Project costing is where Odoo is strongest. Every project in Odoo is linked to an analytic account. Any cost or revenue that carries that analytic account, from any app, is counted against the job. The project’s profitability view then shows revenue, costs and margin without a separate report.
Labor from timesheets
Site engineers and supervisors log hours against project tasks, from a desktop or the mobile app. Odoo values each hour at the hourly cost set on the employee record, so labor cost reaches the project as soon as the timesheet is saved. You can compare planned and actual hours per task, which shows early when a trade is falling behind.
Materials, subcontractors and expenses
Purchase order lines, vendor bills and employee expenses all carry an analytic distribution. A rebar order for one tower, a crane hire for another and a site engineer’s fuel claim each land on the right project. One cost can also be split across several projects by percentage, which helps with shared plant or site overheads.
Budgets with committed cost
Odoo’s analytic budgets let you set a budget per project, or per cost line within a project. Once the budget is open, Odoo shows the achieved amount from posted entries and a committed amount that adds confirmed purchase orders not yet billed. Purchase order lines that exceed the budget are highlighted in red. For a contractor, the committed figure matters most: it shows the cost you have already promised to suppliers, not just what has been invoiced.
Plan your analytic structure before go-live. A common design is one analytic plan for projects and a second for cost type (labor, materials, subcontract, plant, overhead). Getting this wrong is expensive to fix later, so it belongs in the consulting and design phase.
Estimates and bills of quantities: be clear about the gap
This is the area where buyers are most often oversold. Standard Odoo does not include a multi-level bill of quantities (BOQ) with unit rate build-ups, quantity take-off and measured remeasurement.
What standard Odoo does offer:
- Quotation templates with sections and notes, which work well for simple fixed-price or trade packages.
- Odoo Spreadsheet, which can hold an estimate and link to live Odoo data.
- Variations as extra sales orders on the same project, so change orders stay visible next to the main contract.
Odoo’s own construction pages describe a property developer edition with a multi-level work breakdown structure, labor and material ratios and cumulative progress billing. Test it in a trial database against a real tender before relying on it. For a full BOQ, most contractors choose one of three routes:
- Keep estimating in a specialist tool or Excel and import the awarded BOQ into Odoo as the project budget and sales order.
- Install a vetted third-party BOQ app from the Odoo app store, after checking it supports your Odoo version and hosting type.
- Build a focused custom module that matches your BOQ format and certificate layout. See our Odoo customization services.
Subcontractors and purchasing
Subcontractor work is managed in Odoo Purchase. You create a vendor record for each subcontractor, raise a purchase order for the package with the project’s analytic account, and record vendor bills against it. Approval rules can force a manager to sign off orders above a set amount. Purchase agreements (blanket orders) suit framework rates with suppliers such as ready-mix or steel, and alternative requests for quotation let you compare bids side by side.
Two points need extra work. First, the monthly subcontractor payment certificate, with cumulative quantities, previous payments, advance recovery and retention held, is not a standard Odoo document. It can be approximated by billing purchase order lines by percentage, but most contractors want a proper certificate layout, which means configuration or a small custom module. Second, Odoo’s built-in “subcontracting” feature belongs to manufacturing. It is meant for outsourced production, not construction subcontracts, so do not let anyone sell it to you as a construction feature.
Progress billing, retention and ZATCA e-invoicing
Milestones and down payments
Odoo Sales can invoice a service based on milestones. Each milestone carries a percentage of the contract value, and when a site manager marks it reached in the Project app, it becomes ready to invoice. Sales orders also support down payment invoices, as a percentage or a fixed amount, which are deducted from later invoices. Together, these cover most staged payment contracts.
Measured progress claims, where each BOQ line is billed by quantity completed, need a BOQ in the system first. That brings you back to the choice in the previous section.
Retention
Many Saudi contracts hold back 5 to 10% of each invoice until handover or the end of the defects period. Odoo’s Saudi localization documentation describes a setup for this. You create a negative tax marked as retention, or add a separate negative line, so retention reduces the amount payable but not the taxable amount. Odoo notes that VAT is generally calculated on the full invoice amount, and that a later invoice releasing retention is generally not a tax invoice for ZATCA. Agree the treatment for your own contracts with your tax adviser, and test it in ZATCA’s simulation environment before go-live.
Tracking how much retention each client still holds, and when it falls due, needs reporting set up on top. That is configuration, not code, in most projects.
ZATCA and VAT on progress invoices
Progress invoices to a company or government entity are standard tax invoices. In Phase 2, Odoo sends each one to ZATCA for clearance before it is shared with the client, and adds the QR code to the PDF. Each sales journal is onboarded separately with a one-time password from the Fatoora portal. Credit notes for disputed claims and debit notes for variations follow the same route. Odoo’s documentation adds that down payments must be handled in line with ZATCA’s own guidelines, so plan this case carefully. Our Odoo ZATCA e-invoicing guide explains the onboarding steps, and Odoo accounting for Saudi Arabia covers VAT returns at 15%.
Site inventory and equipment maintenance
Site stores
Odoo Inventory can model each site as its own warehouse or stock location. Materials move from the main store to site through internal transfers, so you always know what sits where. When materials are used, they should be issued to the project so the cost reaches its analytic account. This part needs careful setup, because by default a stock move values inventory but does not book cost to a project. Barcode scanning on a phone helps storekeepers record receipts and issues on site.
Plant and equipment
The Maintenance app keeps a record for each machine, generator or tower crane. Preventive requests can be scheduled on a recurring basis, corrective requests log breakdowns, and the maintenance calendar shows what is due. Vehicles can sit in the Fleet app with contracts and service history. Spare parts and fuel bought for a machine can carry the analytic account of the project where it is working, so plant cost stays inside job costing.
Where Odoo is not the right tool
An honest scope saves money. In our view, Odoo should sit next to, not replace, these tools on larger projects:
- Critical-path scheduling. Odoo Project has tasks, dependencies and a Gantt view, which is enough for many fit-out and MEP jobs. It is not a CPM engine with baselines, float analysis and resource levelling. Large projects often keep a dedicated planning tool and link progress to Odoo.
- BIM and design coordination. Odoo does not read models or drawings. Odoo Documents can store drawings and site photos, but design control stays in specialist software.
- Contract-specific claim formats. If a client demands a fixed certificate format, budget for a custom report.
Where a specialist tool stays, connect it to Odoo rather than re-typing data. Our Odoo integration services cover this.
Cost of Odoo for a construction company in Saudi Arabia
At the time of writing (November 2026), the Odoo pricing page lists the Standard plan at US$16.90 (about SAR 63) per user per month and the Custom plan at US$32.00 (about SAR 120), both billed yearly. Contractors usually need the Custom plan, because it includes Odoo Studio, multi-company, the external API for integrations and the choice of Odoo.sh or on-premise hosting.
Implementation is a separate, one-off cost. The ranges below are indicative market ranges, not a quote:
| Scope | Typical content | Indicative range (SAR) |
|---|---|---|
| Focused rollout | Project costing, purchase, invoicing with ZATCA, up to 10 users | 20,000 to 60,000 |
| Mid-size contractor | Adds site stores, maintenance, payroll, retention and milestone billing | 60,000 to 180,000 |
| Multi-company or custom | Adds BOQ or certificate modules, integrations, several entities | 180,000 and above |
For more detail, see our Odoo implementation cost guide for Saudi Arabia or try the Odoo cost calculator.
How to roll out Odoo on a construction business
- Design the cost structure first: analytic plans, project numbering, cost types and approval limits.
- Run one live project as a pilot before moving the whole portfolio. Pick a mid-sized job with active subcontractors.
- Decide the BOQ route early: import, app or custom module. It shapes billing and budgets.
- Onboard ZATCA in simulation and test progress invoices, retention and credit notes end to end.
- Train site staff on mobile timesheets and stock issues, because job costing is only as good as site data.
OzonLayer is an official Odoo Silver Partner with three Odoo 18 certified consultants and an office in Saudi Arabia. Our ZATCA integration case study for an industrial steel company shows how we handle compliance on a project-based business, and our Odoo implementation services in Saudi Arabia page explains how we deliver.
Want to know which parts of your process Odoo covers as standard, and which need configuration or a custom module? Book a free consultation and bring a real project, a recent progress invoice and a subcontractor certificate.
Frequently asked questions
Is Odoo good construction management software for Saudi Arabia?
Odoo works well for the business side of contracting in Saudi Arabia: project costing, budgets, purchasing, site stock, timesheets, maintenance and ZATCA-compliant invoicing in one database. It is weaker on bills of quantities, subcontractor certificates and critical-path scheduling, which usually need configuration, a third-party app, a custom module or a separate specialist tool.
Does Odoo have a bill of quantities (BOQ) feature?
Standard Odoo does not include a multi-level BOQ with unit rate build-ups and remeasurement. Simple estimates can use quotation templates with sections or Odoo Spreadsheet. For a full BOQ, contractors usually import the awarded BOQ from their estimating tool, install a vetted third-party app, or build a small custom module.
Can Odoo handle progress billing and retention for construction contracts?
Yes, with setup. Odoo Sales can invoice by milestones, each worth a percentage of the contract, and supports down payment invoices. Odoo's Saudi localization documentation describes a retention setup using a negative retention tax or line, so retention reduces the amount payable but not the taxable amount. Confirm the treatment for your contracts with your tax adviser.
Are Odoo progress invoices ZATCA compliant?
Once your sales journal is onboarded with ZATCA through the Saudi localization, Odoo sends each standard tax invoice to ZATCA for clearance in Phase 2 and adds the QR code. Credit and debit notes follow the same route. Test progress invoices, down payments and retention in the simulation environment before you go live.
How does Odoo track project costs for a contractor?
Each project has an analytic account. Timesheet hours are valued at each employee's hourly cost, while purchase orders, vendor bills and expenses carry the project's analytic distribution. Analytic budgets then show achieved cost and committed cost, which includes confirmed purchase orders not yet billed, so you see overruns before invoices arrive.
Can Odoo manage subcontractors?
Odoo Purchase handles subcontractor orders, approvals and vendor bills against each project. Monthly subcontractor payment certificates with cumulative quantities, advance recovery and retention are not a standard document, so most contractors add configuration or a small custom module. Odoo's built-in subcontracting feature is for manufacturing, not construction subcontracts.
How much does Odoo cost for a construction company in Saudi Arabia?
At the time of writing, Odoo's Custom plan is US$32.00 (about SAR 120) per user per month billed yearly. Implementation is separate. Indicative market ranges, not a quote, are SAR 20,000 to 60,000 for a focused rollout, SAR 60,000 to 180,000 for a mid-size contractor, and SAR 180,000 or more with custom modules.
