CIAW compliance, reduced admin, and 2027 readiness,step by step
Time registration on Belgian construction sites is no longer optional. CIAW mandates electronic attendance tracking for most construction projects, with fines up to €6,000 per worker per day. From 2027, ALL Belgian employers must have an objective, reliable system for recording daily hours.
Automated time registration solves this. It captures check-in and check-out times instantly, creates tamper-proof audit trails, integrates with payroll, and eliminates the administrative burden of manual tracking.
This guide shows you how to choose, implement, and optimise time registration automation for your construction sites.
Automate from day one with Suivo’s Check-in at Work solution.
Why Automate?
Manual time registration creates a cascade of problems:
- Workers fill out timesheets from memory days or weeks later
- Supervisors transcribe handwritten hours into spreadsheets
- Data entry errors slip through to payroll
- When an inspection happens, you scramble to produce records
Automated systems capture the moment a worker arrives. That moment is locked with a timestamp, GPS location, and digital signature. No interpretation. No amendment. No dispute.
📊 Manual vs automated: A company with 50 workers across 3 sites spends 10-15 hours per week on manual time registration tasks. That’s 500-750 hours per year. At €25/hour, manual registration costs €12,500-€18,750 annually,before fines. Automated systems reduce this to under 2 hours per week.
CIAW and CIAO: What You Must Know
CIAW (Check in at Work) requires electronic attendance for construction sites:
- No subcontractor: projects > €500,000 excl. VAT
- 1 subcontractor: projects > €5,000 excl. VAT
- 2+ subcontractors: always mandatory
CIAO (Check in AND Out) requires both arrival and departure times. Active for cleaning since 2024, expanding across regulated sectors. By 2027, CIAO-level registration will likely be the baseline standard.
⚠️ Chain liability: Main contractors are jointly liable for subcontractor compliance. If a subcontractor fails to register workers, the main contractor faces the fine. You cannot assume subcontractors will handle their own registration,you must oversee and verify it.
Three Technology Options
| Technology | How It Works | Best For | Compliance |
| Site terminal / kiosk | Workers scan RFID badge or enter PIN at site entrance | Large sites, high volume | CIAW/CIAO ✅ |
| Vehicle hardware + GPS | Automatic check-in via geofence when vehicle enters site | Mobile teams, multi-site | CIAW ✅ |
| Mobile app | Workers check in via smartphone with GPS verification | Flexible, distributed crews | CIAW/CIAO ✅ |
Site Terminals
Physical terminals at site entrances. Workers scan an RFID badge to log in and out. Durable, doesn’t rely on worker smartphones, minimal training. Best for large sites with consistent foot traffic.
Vehicle Hardware + GPS
Automatic check-in when a tagged vehicle enters the site geofence. Zero manual action required. Ideal for mobile teams, delivery contractors, and crews visiting multiple sites per day.
Mobile App
Workers check in via smartphone with GPS verification. Flexible and scalable,no hardware investment. Requires WiFi or mobile data for every registration (by design, to ensure data integrity and prevent timestamp manipulation).
Step-by-Step Implementation
Step 1: Assess your sites and workforce
Map all sites, count workers at each, and identify which technology fits. Large permanent sites benefit from terminals. Mobile teams suit vehicle hardware. Dispersed crews work best with the app. Document your current process,what works and what causes friction.
Step 2: Choose a CIAW-compliant platform
Select a system with direct NSSO integration, tamper-proof logging, payroll connection, and compliance reporting. The platform should satisfy an NSSO inspection without manual workarounds. Suivo’s CIAW solution handles all three registration methods from one dashboard.
Step 3: Pilot on one site
Deploy on a single site with 5-10 workers for 2 weeks. Train workers and supervisors. Document issues, gather feedback, and refine before rolling out company-wide.
Step 4: Integrate with payroll
Connect time data to your payroll provider (SD Worx, Partena, Acerta) via API. This eliminates manual hour entry, reduces payroll errors, and creates a single source of truth.
Step 5: Create standard operating procedures
Document: how and when workers check in, what to do if a registration fails, how to handle late arrivals, and who monitors compliance. Train every worker, supervisor, and site manager.
Step 6: Monitor and escalate
Set up daily reports showing check-ins, no-shows, and incomplete registrations. Establish escalation rules: if a worker hasn’t checked out 30 minutes after shift end, notify the supervisor. This prevents data gaps.
Managing Subcontractor Registration
Chain liability is where many contractors stumble. Best practices:
- Require all subcontractors to use your centralised platform,not their own separate systems
- Include time registration in subcontractor contracts,make compliance a contractual obligation
- Run weekly compliance audits,check subcontractor registration data against who’s physically on site
- Brief subcontractor managers at project kickoff,explain your system, train their supervisors
- Maintain documentation,keep records of all subcontractor registrations for audit trails
Preparing for 2027
January 2027 marks a turning point. ALL Belgian employers must have an objective, reliable system for recording daily working hours. Not optional. Not construction-specific. Universal.
Contractors who adopt now gain three advantages:
1. Work out operational issues before the deadline
2. Time to train workers and integrate systems without pressure
3. Avoid the rush and premium costs of last-minute implementations
Frequently Asked Questions
Is automated time registration mandatory now?
CIAW is mandatory for construction sites meeting subcontractor thresholds. Full digital time registration becomes mandatory for all Belgian employers from January 2027. Implementing now gives you 12-18 months of operational benefit before the mandate.
Can I use mobile apps for CIAW compliance?
Yes. Mobile apps with GPS verification and real-time NSSO transmission meet CIAW requirements. The system must be objective, reliable, and produce audit trails. Suivo’s app requires WiFi or mobile data for every registration to ensure data integrity.
How do we handle workers on multiple sites in one day?
A centralised platform allows workers to check in and out at different sites using the same system. Each registration is timestamped and GPS-tagged, creating a complete activity log across all locations.
What are the penalties for non-compliance?
CIAW fines reach €6,000 per worker per day. Main contractors are liable for subcontractor violations. Non-compliance can also result in work site shutdowns and damage to public procurement eligibility.
Explore Suivo’stime tracking andconstruction solutions.
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