Checkinatwork Construction Site Registration: Who Needs to Register What?

By Hilde Lavrijssen · August 2021 · updated August 2026

On a construction site with a budget of 500,000 euros or more, site registration is mandatory: everyone present must be registered daily with the RSZ. It sounds simple, until you’re standing at the gate with your own crews, subcontractors, temporary workers, and foreign-language-speaking tradespeople—each with a different form of identification.

Who exactly is responsible, how to organize it in practice, and what will change in 2027.

When is construction site registration required?

The requirement applies to construction projects on real property with a total investment of 500,000 euros or more. If your project exceeds that threshold, you must report it to the RSZ, and every person working on the project must register daily.

"Construction Site Registration," "Attendance Registration," and "Checkin@work" all refer to the same requirement. The official term is the reporting of work and the registration of attendance with the RSZ; in practice, everyone on the construction site uses the shorter terms.

That threshold refers to the total value of the project, not to your share of it. If you’re working as a subcontractor on an 800,000-euro project for 40,000 euros, you’re still subject to the registration requirement.

Who is required to register?

The responsibility lies both with the person who sends someone to work and with the person who performs the work. They agree among themselves who will handle the record-keeping—and both parties can verify that it has actually been done.

• 1
  The employer or contractor

  You are responsible for ensuring that your employees, your subcontractors, and the employees of your subcontractors are registered. You can do this yourself, or make clear arrangements for them to do it themselves. Making such arrangements does not relieve you of the obligation to verify that it has been done.
• 2
  The employee

  Every employee must ensure that their attendance has been correctly recorded. This is an individual responsibility, and that is precisely why it is important for someone at the gate to immediately verify whether it was recorded correctly.
• 3
  The Independent Subcontractor

  Self-employed individuals who work as subcontractors must be registered. The same rules that apply to employees also apply to them.
• 4
  Temporary Workers

  The temporary employment agency acts as a subcontractor for the company that deploys the temporary worker. The company that uses the temporary worker reports the attendance. The relationship between the employee, the temporary employment agency, and the user is determined based on the Dimona data.
• 5
  Foreign Workers

  A foreign worker registers by having the QR code on his or her Limosa-1 document scanned. No additional badge is required, and there is no language barrier at the gate.
• 6
  Foreign contractors

  Foreign contractors can also register their workers themselves by scanning the QR codes from their workers’ Limosa-1 documents at the time clock.

Why does this requirement exist?

Occupational Safety and Health

The registration requirement stems from workplace safety laws. In the event of an accident or an evacuation, there must be no doubt as to who was on the job site at that time. This is not an administrative formality—it is the very reason the law exists.

Fight Against Social Fraud

By accurately recording who is present and in what capacity, illegal subcontracting becomes apparent. For companies that operate properly, this provides protection against competitors who do not.

How do you organize site registration in practice?

There are three ways to have your employees check in. Which one is best depends on the worksite, the size of the crews, and whether everyone enters through a single entrance.

• 1
  Time clock at the shipyard gate

  One or more devices at the entrance. Everyone must identify themselves before they begin. The panel displays three lights: green if the data has been sent to the RSZ, red if something went wrong. The text on the panel is intentionally in English, because a large proportion of the workers on Belgian construction sites speak other languages.
  
  Want to make sure no one enters without registering? Then connect the time clock to a turnstile: no valid registration, no access.
• 2
  In-vehicle mobile time clock

  For teams that drive company vehicles to various job sites. The mobile time clock is placed in the vehicle—or at a fixed location such as a warehouse—and has its own real-time clock, ensuring that time records are accurate even in areas with limited GPS reception. Employees scan their Dallas key upon departure, and check-in at the job site occurs automatically via a geofence. You’ll immediately know who worked at which job site, which makes the calculation of commute mileage much easier afterward.
  
  Please note: with this method, the employee cannot see whether the registration was successful. The system does verify the registration, but feedback is provided by the dispatch center. Vehicle-based mobility
• 3
  Mobile app or tablet

  For smaller job sites or crews without permanent access. The employee checks in using their smartphone or tablet and immediately sees on the screen whether the check-in has been accepted. Checkinatwork via app

Which badges work?

Construbadge, LISA badge, RFID badge, Dallas key, company badge, QR code, eID, and the QR code on a Limosa-1 document. You choose which methods to allow, so your teams don’t have to carry an extra badge.

What will change in 2027?

Starting in 2027, advance registrations will no longer be permitted. Anyone who, this morning, enters all attendance records for the day at once, or adds them later, must change this practice. Registration must take place at the moment that someone actually arrives.

In addition, there is a draft bill on the table that would also make check-out mandatory: not only registering when someone arrives, but also when they leave. It’s not law yet—keep an eye on it, but don’t base your planning on it just yet.

Anyone who is already using a system that records and verifies data in real time today, will not need to make many changes. Everything you need to know about the changes in 2027

Frequently Asked Questions

Hilde Lavrijssen — Marketing Manager at AllConnects

Closely follows the digitization of fleet management, equipment management, and time tracking in the construction industry and translates these developments into practical insights for companies on the road and at the construction site.