Posting construction and installation workers to Belgium from outside the EU
Your company sends its own staff to a building, installation or service job in Belgium, from outside the EU or from another EU country. Belgium then expects a LIMOSA declaration naming a liaison person before work starts and, on sites worth EUR 500,000 or more excluding VAT, attendance registration in Checkinatwork. For construction pay, the reference is the joint committee 124 hourly scales, and each rule below links to its official source.
What a foreign employer owes in Belgium
Six verified obligations, who carries them and when they apply.
| Obligation | Rule | Who | When or how long | Official source |
|---|---|---|---|---|
| Prior declaration | LIMOSA declaration, filed online | The posting employer | Before work in Belgium starts | FPS Employment |
| Liaison person | A natural person, the contact for the inspection services | Named in the LIMOSA declaration | With the declaration | Law of 5 March 2002 |
| Social documents | No Belgian social documents once LIMOSA is filed | The posting employer | 12 months | FPS Employment |
| Construction pay | Joint committee 124 hourly scales, EUR 18.747 (category I) to EUR 27.003 (foreman) | Employers posting construction workers | Indexed on 1 October 2026 | CP 124 posting fiche |
| Loyalty and bad-weather stamps | EU employer exempt if covered by an equivalent scheme at home | Construction employers from another EU country | Check before work starts | CP 124 posting fiche |
| Attendance registration | Checkinatwork on sites of EUR 500,000 or more excluding VAT | Every site at or above the threshold | IN and OUT from 1 April 2027 | Checkinatwork |
Work permits for staff from outside the EU are missing from this table on purpose: we have not found an official source that settles them for Belgium. The section on non-EU staff below explains what to confirm.
The LIMOSA declaration and the liaison person
One online declaration, made before the first day of work in Belgium.
An employer who sends staff to work in Belgium files a LIMOSA declaration online before the work starts. The obligation comes from the Programme Law of 27 December 2006, and the FPS Employment, Labour and Social Dialogue lists the formalities on its posting pages (FPS Employment, formalities).
One named contact for the inspectors
The declaration names a liaison person: a natural person in charge of contact with the Belgian inspection services. The rule comes from the Law of 5 March 2002 (FPS Employment). Pick someone who can be reached for the whole posting and who can answer questions about your workers.
No Belgian social documents for 12 months
Once the LIMOSA declaration is made, the employer is exempt from Belgian social documents for 12 months, under the Law of 5 March 2002 and the royal decree on social documents (FPS Employment). For a posting planned beyond 12 months, ask the FPS Employment which documents apply from then on.
The sources we read do not give the amount of the sanctions for a missing or late declaration; see the open points further down.
Construction pay under joint committee 124
Hourly scales from the FPS Employment posting fiche dated 13 October 2026.
For construction, the FPS Employment publishes a posting fiche for joint committee 124 (CP 124), based on the sector's collective agreements. Its hourly wage scales, indexed on 1 October 2026, run from EUR 18.747 for category I to EUR 27.003 for a foreman (CP 124 posting fiche).
Place each worker in a category before you price the job, then compare the hourly pay you plan with the scale for that category. The fiche gives figures per hour, so convert a monthly or daily wage paid at home into an hourly rate before you compare. The figures are those indexed on 1 October 2026, so check the fiche again before a later job.
Loyalty and bad-weather stamps
The CP 124 agreements provide loyalty stamps and bad-weather stamps. An employer established in another EU country is exempt from them if it falls under an equivalent scheme in its own country (CP 124 posting fiche). Keep proof of that cover in the posting file.
No guidance found for your case
The exemption we found is written for EU employers. We have not found official guidance on how a company established outside the EU is treated for these stamps. Ask the FPS Employment or a licensed adviser before you set the first Belgian payroll.
Checkinatwork on larger building sites
Attendance registration, required from a site value of EUR 500,000 excluding VAT.
On construction sites worth EUR 500,000 or more excluding VAT, attendance must be registered in Checkinatwork (Programme Law of 30 May 2026, Belgian social security portal).
The threshold refers to the site, so ask the client or main contractor for the value of the works on the site before you sign, even for a small installation job.
Change on 1 April 2027
From 1 April 2027, attendance on these sites is registered both IN and OUT (Checkinatwork). A posting that starts in 2026 and runs past that date changes procedure mid-job. Agree in writing with the main contractor who registers your workers, and how, before the change.
Work permits for workers from outside the EU
The point our official sources do not settle yet.
We have not read an official source on work authorisation for non-EU nationals posted to Belgium. That gap covers two cases: a company from outside the EU sending its own non-EU staff, and a company in another EU country posting non-EU staff it employs at home. Confirm the position with the competent Belgian authority or a licensed adviser before you book travel, and allow time for the answer.
EU law sets the common base for postings, and Belgium adds its own formalities: LIMOSA, the liaison person and Checkinatwork. The base rules, the A1 social security certificate and the formalities of the other countries are compared in our overview of posting rules across Europe.
The order a posting to Belgium follows
From the quote to the end of a long posting. Dates are the official ones where a source gives one.
Check the site value and the pay scales
Ask for the value of the works excluding VAT to know whether Checkinatwork applies, and place each worker in a CP 124 category.
Settle work authorisation for non-EU staff
No official guidance found in our research. Get the answer from the competent authority or a licensed adviser.
File the LIMOSA declaration
Name the liaison person in it. With the declaration, the employer is exempt from Belgian social documents for 12 months.
Register attendance in Checkinatwork
Agree with the main contractor how your workers are registered on the site.
Register IN and OUT
Sites covered by Checkinatwork move to registration on arrival and on departure.
Review the social documents
The LIMOSA exemption from Belgian social documents runs for 12 months. Ask the FPS Employment what applies to a longer posting.
What the official sources do not settle
Four points remain open after our reading of the official sources. We have not read the regional rules on employing foreign workers posted to Belgium, including the single permit and the exemption for non-EU staff of an EU employer. We have not found the amounts of the LIMOSA sanctions. How an employer from outside the EU is treated for the loyalty and bad-weather stamps is not stated in what we read. At EU level, a single electronic posting declaration has been proposed, and we found no sign that it has been adopted. Confirm each point with the competent authority or a licensed adviser before you rely on it.
What Balt Partners coordinates
One contact for the Belgian paperwork of your posting. A licensed local adviser handles the filings.
Belgian obligation map
LIMOSA timing, the liaison person, the CP 124 category of each worker, the Checkinatwork threshold and the 1 April 2027 change, set out for your job with the dates in one calendar.
LIMOSA declaration
We collect the worker and job data, and we bring in a licensed adviser in Belgium for the declaration and the choice of liaison person.
Pay, stamps and permits
Your planned hourly pay set against the CP 124 scales, with the stamps and work-permit questions put to a licensed adviser in Belgium before the first payroll.
A Latvian company when it pays off
For work in Europe beyond one contract, a Latvian SIA with its bank account and accounting set-up. Whether posting from an EU company changes the Belgian rules for your non-EU staff is still open, so check it before you restructure.
Posting to several countries? Our guide to posted workers in Europe sets Belgium beside Germany, France and the rest. If an EU base makes sense, our page on forming an EU company as a non-resident explains the Latvian route.
Questions from foreign employers about Belgium
LIMOSA is the online declaration Belgium requires for posted workers. It must be made before the work in Belgium starts. It names a liaison person for the Belgian inspection services and exempts the employer from Belgian social documents for 12 months.
Not for 12 months if a LIMOSA declaration has been made. For a posting planned beyond 12 months, ask the FPS Employment which documents apply from then on.
The liaison person is a natural person named in the LIMOSA declaration, in charge of contact with the Belgian inspection services. The rule comes from the Law of 5 March 2002.
The FPS Employment posting fiche for joint committee 124, dated 13 October 2026, lists hourly scales indexed on 1 October 2026: from EUR 18.747 an hour for category I to EUR 27.003 an hour for a foreman. Check each worker's category against it.
Checkinatwork is the Belgian attendance registration for construction sites. It is required on sites worth EUR 500,000 or more excluding VAT, and from 1 April 2027 attendance is registered both IN and OUT.
An employer from another EU country is exempt if it falls under an equivalent scheme in its own country. We found no official guidance on employers from outside the EU, so confirm the point with the FPS Employment or a licensed adviser.
We have not found an official source that settles this, whether the employer is based outside the EU or in another EU country. Confirm it with the competent Belgian authority or a licensed adviser before the workers travel.