Focus on social inspection audits in the construction sector…What to expect in 2021?
Last week, the Social Information and Investigation Service (“SIOD/SIRS”) published its 2021 Action Plan revealing the inspection services’ strategy and top priorities for 2021. As over the last few years, the construction sector continues to be highly-targeted. We summarise what you can expect in 2021. We also set out how you can prepare, based on the SIOD/SIRS checklist.
FLASH CONTROLS IN MAY 2021
The construction sector will be subject to so-called ‘flash controls’ in May 2021. Inspectors of several inspection services (social laws, social security, etc.) will jointly proceed with coordinated actions in the construction sector.
Although the flash controls mainly have a preventative and informative nature, the inspection services will in non-compliance cases proceed with the necessary action, including issuing Pro-Justitias.
OTHER TAKE-AWAYS FROM THE 2021 ACTION PLAN
According to the 2021 Action Plan, no less than 2,000 inspection audits can be expected in the construction sector. The flash controls will come on top of these unannounced inspection audits. Social dumping, non-declared employment and social security contribution fraud remain a priority for the inspection services.
In this respect, the 2021 Action Plan not only continues its action points as identified in the 2020 Action Plan but also introduces some new focus actions, which will be embedded in a sector-specific approach, focussing on social fraud phenomena that are typical for the construction sector. We have listed the most eye-catching new actions in the overview below:

Of course, the more traditional “actions” also have their place in the 2021 Action Plan, such as audits focusing on the joint liability for salary between contractors and subcontractors, non-compliance with the legislation on interim work, fraudulent posting set-ups, social dumping audits, Limosa checks, new employers audits, etc.
In addition, the federal minister in charge of the coordination of combatting fraud has announced in a separate action plan that large construction sites will be monitored pro-actively and systematically, not only by the various social inspection services but also by the tax inspection services. More details of this action plan are expected in the coming weeks.
BE PREPARED AND HAVE A LOOK AT THE CONSTRUCTION CHECKLIST
SIOD/SIRS has published a checklist that allows employers to proceed with a self-compliance check. This checklist gives an idea of the questions that can be asked by a social inspector and which documents could be requested. An update of this checklist has been announced in the 2021 Action Plan as well.
1. Documents that can be requested in case of an audit

2. Questions that can be asked by a social inspector to individuals working on a construction site

3. Documents that can be asked by a social inspector to individuals working on a construction site

This is not an exhaustive list. Other questions can be raised and other documents can be requested as well. For example, with a social inspection audit on a construction site, in which various contractors are active (as part of a contractor ‘chain’), the inspection services will very often focus on detecting unlawful employee lending issues, i.e. the situation in which workers are being put at the disposal of third-party users whereby the latter exercise (part of) the authority vested with the employer over such workers.
A full copy of the checklist can be found here (Dutch) or here (French).
For more information on this topic, please do not hesitate to get in touch with Emma Van Caenegem.
Written by
Recommended articles
The 2028 social elections: Should you already be doing something now?
In May 2028, all employers employing, on average, at least 50 workers (for the Committee for Prevention and Protection at Work) or 100 workers (for the Works Council), must organise social elections to elect employee representatives to these consultative bodies.
Read onBelgium immigration update: new Annex 64 and other changes for frontier workers
New rules recently came into force, modernising how frontier workers enter and leave Belgium. Frontier workers who do not have the nationality of an EEA country or Switzerland must now hold an Annex 64, or a specific D visa, to enter and leave Belgium for a period exceeding 90 days. This article gives a short overview of the main changes. Importantly, these changes do not affect a frontier worker’s right to work in Belgium.
Read onNew Flemish Fee for Single Permit Applications from 1 September 2026
As of 1 September 2026, employers applying for a single permit in the Flemish Region will be required to pay a retribution of EUR 180 per application. The retribution applies to both first applications and renewals and will be collected via the One-Stop Counter (“Uniek Loket” / “Guichet Unique”) at the time of submission. Applications […]
Read on