PriMus Online — Free Online Cost Estimating Software
Professional Construction Estimating. In Your Browser. Free to Start.
PriMus online is cloud-based online cost estimating software that puts construction cost estimates, bills of quantities, and real-time team collaboration inside any browser — on any device, from any location, with no installation required. The full power of PriMus professional estimating, delivered as a free online cost estimator with no barriers to getting started.
Free Access Callout The Light version is permanently free — cost estimates and price list access included. Upgrade to Full for complete cloud-based bill of quantities and construction cost management capability.
Trust Statement Before technology, there has to be a relationship. Isotech supports estimating teams and commercial managers across the GCC — coaching and guiding your adoption of online construction cost estimating at every step.
Value Pillars
Free Online Cost Estimator. No Installation.
Start producing professional cost estimates immediately — no download, no setup, no IT approval required. PriMus online works in any browser on any device, from the first minute you register.
Real-Time Team Collaboration
Multiple team members working on the same estimate simultaneously — changes visible in real time, with built-in chat in the same working environment. Online construction cost estimating built for distributed GCC project teams.
Cloud-Based Bill of Quantities. Always Accessible.
Every estimate and BoQ stored securely in the cloud — accessible from anywhere, backed up automatically, and protected by role-based access controls. No local files. No version confusion. No lost data.
Connected to BIM Cost Estimating
PriMus online integrates within the usBIM platform alongside PriMus IFC for BIM quantity takeoff, PriMus TAKEOFF for CAD measurement, and the full PriMus suite — connecting cloud-based estimating to a complete 5D BIM workflow when your projects require it.
Platform Introduction
Construction Cost Estimates Should Not Live on a Single Person's Laptop.
For many estimating and quantity surveying teams across the GCC, construction cost estimates are still managed in desktop spreadsheets or locally installed software. The estimate is on one machine. Only one person can edit it at a time. Sharing it means emailing a file — creating version conflicts the moment two people work on it simultaneously.
When the project is live, the estimate is never where you need it. When a team member is travelling, they cannot access it. When the design changes and the commercial manager needs an updated number, they have to wait.
PriMus online solves this. As cloud-based online cost estimating software, it puts the estimate in the browser — accessible to every authorised team member from any device, updated in real time as the team works, and stored securely in the cloud so it is never at risk of being lost to a hardware failure or an email attachment that cannot be found.
This is what professional online construction cost estimating looks like for project teams that need to move at the speed their projects demand.
Core Capabilities
Cost Estimates. Bills of Quantities. Real-Time Collaboration. All in the Browser.
Produce professional construction cost estimates online using an intuitive interface and free access to a constantly updated database of construction price lists. The Light version is permanently free — no subscription, no time limit, no credit card required.
Upgrade to PriMus online Full for complete cloud-based bill of quantities capability — structured BoQ production, construction cost management, and export options including PDF, Excel, and Word.
Every authorised team member accesses the same estimate simultaneously. Changes are reflected across all sessions in real time, and built-in chat keeps discussion inside the working environment.
PriMus online works on desktop, laptop, and mobile — on Windows, Mac OS, and every standard browser. No installation dependency. No version updates to manage.
Estimate and BoQ data is stored in the usBIM cloud with GDPR-compliant data protection, role-based access controls, automatic backup, and advanced disaster recovery.
Free vs Full
Start Free. Scale When You Need To.
- Cost estimates from scratch
- Free price list database access
- Browser-based, any device
- No installation
- No credit card required
- Everything in Light
- Complete cloud-based bill of quantities
- BoQ production to any format
- Construction cost management
- Full document export: PDF, Word, Excel
- Advanced collaboration and permission management
For teams new to online construction cost estimating, the Light version provides the fastest possible entry point — start using a professional free online cost estimator today, with no commercial commitment, and upgrade to Full when your project requirements demand the complete BoQ and cost management capability.
BIM Connection
Online Estimating That Connects to 5D BIM When Your Projects Need It.
PriMus online is not a standalone tool. It is the cloud-based estimating layer within the usBIM platform — sitting alongside PriMus IFC for BIM quantity takeoff and BIM cost estimating from IFC models, and PriMus for full desktop construction cost management.
For project teams moving toward 5D BIM workflows — where quantities are extracted automatically from IFC models and fed directly into cost estimates — PriMus online provides the collaborative cloud environment where those estimates are reviewed, refined, and shared. The IFC cost estimating workflow from PriMus IFC and the collaborative online cost estimating environment of PriMus online work together as a single connected commercial process.
For GCC organisations at early stages of BIM adoption, PriMus online is the accessible entry point — professional online construction cost estimating today, with a clear path to full BIM quantity takeoff software integration when the programme is ready.
Isotech Differentiator
Online Cost Estimating Software. With Regional Support Behind It.
PriMus online is online cost estimating software from ACCA — the world's number one IFC-certified openBIM expert. As Isotech, we bring it to estimators, quantity surveyors, and commercial teams across the Middle East and Africa with the onboarding support, workflow guidance, and regional context that make adoption straightforward.
For teams transitioning from spreadsheet estimating to professional online construction cost estimating for the first time, Isotech provides the hands-on coaching that turns a free platform registration into a working, productive commercial workflow — connected to your project environment and aligned to your team's requirements.
Technology Partner
We are proud to partner with ACCA Software, a global provider of BIM, digital construction, and Common Data Environment (CDE) solutions. Through this collaboration, we leverage advanced technologies that support ISO 19650-compliant workflows, streamline project coordination, and enhance information management across the entire project lifecycle.
This partnership enables us to deliver innovative, scalable, and industry-aligned solutions that help clients improve collaboration, efficiency, and project outcomes.
Questions Worth Answering Up Front.
What is PriMus online and who is it for?
PriMus online is cloud-based online cost estimating software for construction professionals — estimators, quantity surveyors, project designers, and commercial managers — who need to produce cost estimates and bills of quantities from any browser, on any device, with real-time team collaboration built in. The Light version is permanently free and includes cost estimates and price list access. The Full version adds a complete cloud-based bill of quantities production and construction cost management capability. It is part of the usBIM platform and connects directly to PriMus IFC for 5D BIM and BIM cost estimating workflows.
Is PriMus online really free?
Yes. The Light version of PriMus online is a permanently free online cost estimator — no time limit, no credit card, no subscription required. It includes cost estimates and free access to a construction price list database. The Full version, which adds cloud-based bill of quantities production and full construction cost management, is available on a subscription plan. For teams that need professional online construction cost estimating capability immediately and at no cost, the Light version is a complete, professional-grade starting point.
How does real-time collaboration work in PriMus online?
Multiple authorised team members can access and edit the same cost estimate or BoQ simultaneously in PriMus online. Changes made by any team member are immediately visible to all others — no saving, no sending, no version reconciliation required. Built-in chat allows the team to communicate within the same working environment. For distributed project teams across the GCC — where commercial colleagues may be in different cities or countries — this real-time collaborative environment eliminates the version control problems that make shared estimating difficult in traditional desktop or spreadsheet workflows.
How does PriMus online connect to 5D BIM and BIM quantity takeoff?
PriMus online is part of the usBIM platform, which also includes PriMus IFC — the 5D BIM software for automatic BIM quantity takeoff from IFC models. Quantities extracted by PriMus IFC feed directly into the PriMus estimating environment, where they can be reviewed, annotated, and developed into a complete cost estimate or BoQ within the same connected platform. For teams working toward IFC cost estimating and full 5D BIM workflows, PriMus online provides the collaborative cloud layer that connects BIM model data to the commercial team’s working environment.
What support does Isotech provide?
Isotech provides onboarding support, workflow configuration, and long-term technical assistance for PriMus online across the Middle East and Africa. We help commercial teams get started quickly, configure the platform for their project types and team structure, and integrate PriMus online with the wider PriMus suite and usBIM BIM cost estimating environment when required. Contact our team to discuss your specific requirements.
Professional Online Construction Cost Estimating. Free. In Your Browser. Right Now.
PriMus online is the free online cost estimator that puts professional cloud-based bill of quantities and construction cost estimating capability in every browser, on every device, for every member of your commercial team — with no installation, no time limit, and no reason to wait. Backed by Isotech’s coaching and support across the GCC and MEA from day one.
Start free. Collaborate instantly. Build with Isotech alongside you.
