Some activities are exempt from the Belgian Limosa declaration, but the list is specific and most exemptions come with a hard day limit. International transport, academic conferences, short business meetings, brief installation work, urgent repairs by specialised technicians, certain athletes, artists and scientists, and public or diplomatic staff can qualify. If your activity is not squarely inside one of these, you must file before work starts. Getting the threshold wrong is treated as failing to declare at all.
The full exemption list
According to Working in Belgium, the exempt categories are:
| Exempt category | The limit |
|---|---|
| International transport of persons or goods | Exempt, except cabotage in non-road sectors |
| Attending scientific or academic conferences | Exempt |
| Attending meetings in a restricted circle | Max 60 days per calendar year, and no single meeting longer than 20 successive calendar days |
| Initial assembly and installation of goods you supplied | Max 8 days, and only for qualified or specialised workers |
| Urgent repair or maintenance work | Max 5 days per month, specialised technicians |
| Self-employed people travelling for business purposes | Max 5 days per month |
| Sportspeople in international competition | Max 3 months per calendar year |
| Artists of international reputation | Max 21 days per quarter |
| Scientists on a scientific programme | Max 3 months per calendar year |
| Staff of public administrations | Exempt |
| Staff of international institutions under ratified treaties | Exempt |
| Diplomatic and consular personnel | Exempt |
The three exemptions that cause the most trouble
Initial assembly and installation, 8 days
This one is read far too broadly. It covers the initial assembly or installation of goods that your own company supplied, carried out by qualified or specialised workers, for a maximum of 8 days.
It does not cover ongoing installation contracts, work on goods someone else supplied, general construction, or a project that was scoped at a week and ran to two. If the job hits day nine, the exemption is gone. Not reduced for the extra day: gone.
Equipment suppliers who install what they sell are the most exposed here, because the exemption looks tailor-made for them right up until a commissioning problem adds three days.
Urgent repair and maintenance, 5 days per month
The limit is per month, and the word “urgent” carries weight. A planned quarterly maintenance visit is not an urgent repair. A technician who attends the same Belgian client for three days in each of four consecutive months is inside the limit each month, but should look hard at whether the work is genuinely urgent repair rather than a maintenance contract being delivered in instalments.
Meetings in a restricted circle, 60 days a year
Two limits apply at once: no more than 60 days per calendar year, and no single meeting running more than 20 successive calendar days. Both must hold. This exemption covers attending meetings, not delivering work. A “meeting” that involves your people producing output on the client’s premises is not a meeting in this sense.
What an exemption does not cover
Being exempt from Limosa does not put you outside Belgian rules generally.
- Check-in-at-Work still applies where it applies. If the work is on immovable property with a total value of 500,000 euro or more excluding VAT, presence has to be registered before the person starts, daily, regardless of Limosa status. The difference between the systems matters here.
- Belgian working conditions still apply to posted workers, including core pay and sector conditions.
- The A1 obligation is separate. Your worker still needs to evidence which social security system covers them. See A1 certificates for Belgium.
- Your Belgian client’s duties still apply. Joint and several liability for wages and the withholding obligation for social and tax debts do not switch off because you were exempt from a declaration.
What happens if you rely on an exemption and it does not hold
The position is unforgiving: if the exemption does not apply, you did not file a required declaration. That is a level 4 offence, the heaviest category in the Belgian Social Criminal Code, and it carries the possibility of imprisonment alongside financial penalties.
Fines increased on 1 February 2026, when the Act of 19 December 2025 raised the multiplier on social criminal fines from 8 to 10. For some infringements, the amount is multiplied by the number of workers involved, up to a maximum of 100, which is what turns a misjudged exemption on a six-person crew into a serious number.
There is no partial credit for having been close to the limit.
The practical rule: declare when the answer is not obvious
Filing a Limosa declaration is free and takes minutes. A declaration can cover an anticipated duration of up to 24 months and can be extended if the assignment runs longer.
Set against that, the cost of being wrong is a level 4 sanction and a stopped job. So the sensible operating rule for anything near a threshold is simple:
- If the work might exceed 8 days, declare.
- If a “repair” is really a maintenance contract, declare.
- If your crew list might change, declare and amend.
- If nobody in the business can point to the specific exemption by name and state its limit, declare.
Exemptions are worth using when they clearly apply, for genuinely short and well-defined visits. They are a poor basis for planning a project.
Track the days, not the intention
Most failed exemptions are not misinterpretations of the law. They are projects that ran longer than planned, with nobody watching the counter.
If your teams work short assignments across several countries, the days accumulate in places nobody is looking: an extra afternoon here, a return visit there. Presence data that is captured automatically, per person and per site, gives you the count as a fact rather than a recollection, and it is the same record that satisfies check-in-at-work where that applies. That is a great deal easier to defend than a foreman’s memory of when the crew arrived.
See how Fedbeton handles site registration across members.
Exemptions are only one part of the picture. Our overview of Belgian compliance for foreign employers covers every declaration you may still owe.
Book a free demo
If your crews run short assignments in Belgium and you need the day counts and the site records to be reliable, we will show you how the registration works. Book a free demo.
