The Check-in@Work system is about to undergo its most significant evolution since its inception. A draft law provides for a major expansion of the mandatory attendance registration on Belgian construction sites, with an entry into force scheduled for no later than January 1, 2027. Here is what this means in practical terms for your business.
A quick reminder: what is Check-in@Work?
Check-in@Work is the RSZ/ONSS online service used to register the presence of workers on Belgian construction sites where the total value of the work reaches 500,000 euros excluding VAT. This obligation applies to construction work in the broadest sense: demolition, building, renovation, finishing, maintenance, or cleaning. Failure to comply with this obligation can result in fines of up to 6,000 euros per undeclared worker.
The main change: the end of advance registration
Currently, employers can still register their workers in advance and remotely for an entire period. The draft law provides for the complete elimination of this option. Once it comes into effect, every person present on the site will have to register themselves in real-time, both upon arrival (IN) and departure (OUT). Breaks are not expected to require declaration initially.
This principle of registering entries and exits is not entirely new: it has already been applied in the cleaning sector since September 2024, under the name Check In and Out at Work (CIAO). The construction sector will now adopt the same logic.
Why this change?
The objective remains the same as the one that motivated the creation of Check-in@Work: to combat social fraud and unfair competition, while ensuring better safety on construction sites. Knowing exactly who is on-site at any given moment allows for a faster response in the event of an incident or evacuation.
What this means for your organization
In practical terms, companies that were still managing their team registrations in groups or in advance will need to revise their processes. Every worker, subcontractor, or temporary staff member present on a covered site will need to have an appropriate registration method (badge, mobile app, time clock) and use it for every arrival and departure.
For companies already equipped with digital field time-tracking tools, this transition should remain seamless: real-time registration via smartphone or badge is already part of daily life for many teams. For those still operating with paper attendance sheets or manual group registration, the 2027 deadline is the right time to digitize this process.
A timeline yet to be finalized
The draft law must still complete its parliamentary journey, meaning some details could still evolve before it officially takes effect. The exact date will be set by royal decree, with a final deadline of January 1, 2027. The underlying trend, however, is already clear: real-time entry and exit registration is set to become the standard on Belgian construction sites.
We will continue to monitor the progress of this matter and keep you informed of the practical implications for your site management.
Sources: RSZ/ONSS, Federal Public Service Employment, Labour and Social Dialogue.
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