Onboarding student workers in 2026: a practical plan for employers in Belgium

You have found and hired the right student worker, but what now?

Onboarding student workers is an underestimated step for many employers in Belgium. Yet how well you onboard a student worker largely determines how quickly they become productive, how long they stay and whether you can deploy them again next season. In a tight labour market that makes it a strategic choice.

In this article Recruit a Student takes you step by step through the onboarding process for student workers in Belgium: from the compulsory Dimona declaration and the student employment contract to a practical induction programme that works, even if your new student only stays a few weeks.

In short:

Good onboarding of student workers rests on four pillars: the right administrative formalities (Dimona, student employment contract), a structured first working day, a clear overview of the 650-hour quota, and a point of contact who guides the student. Getting this right saves time, avoids fines and builds a reliable student pool for the future.

Our step-by-step plan: Dimona, the student employment contract and induction.

Step 1: the Dimona declaration, compulsory before the first working day

Before a student worker works a single hour for you, you are obliged as an employer to submit a Dimona declaration (immediate declaration of employment) to the NSSO. That applies even to students who work only one day. The Dimona declaration confirms the employment and activates the student’s protection, both in social security terms and for occupational accident insurance.

For student workers you use the specific Dimona type “STU”. Through this type the student quota of 650 hours per calendar year is monitored automatically. If you file late or not at all, you risk the employment being converted into ordinary employment with the correspondingly higher NSSO contributions. You file the Dimona declaration through the NSSO portal: dimona.be.

Step 2: drawing up and signing the student employment contract correctly

A student employment contract is a legal requirement for any employment under student status in Belgium. The contract has to be signed before the work starts and contains at least: the identity details of the employer and the student, the job description, the start date and the duration or end date, the working schedule and place of work, and the agreed pay.

Note: a student employment contract carries a trial period of three days, unless otherwise agreed in writing. During the trial period either party can end the contract without notice. If you use an agency such as Recruit a Student, we take over drawing up and managing the student contracts entirely.

Student workers in Belgium enjoy a strong financial advantage: the solidarity contribution. Instead of the ordinary employee contribution of 13.07%, students pay only 2.71% in NSSO contributions. For the employer a contribution of 5.42% applies instead of the standard 25 to 35%. This advantage applies only within the quota of 650 hours per calendar year.

As an employer you share responsibility for knowing how many hours your student has left. Through the NSSO’s Student@work app the student can check their own balance. You can also request the balance through the NSSO portal. If the student exceeds the 650 hours, the advantages lapse for all hours above the quota and the employment is treated, for tax and social security purposes, as an ordinary employment contract.

Would you like to be sure that the onboarding of your student workers is administratively correct? Recruit a Student guides employers in Antwerp, Ghent, Brussels and across Belgium from A to Z. Request a no-obligation quote.

Step 4: organising an effective first working day

A structured first working day determines how quickly a student worker pays off. Many employers underestimate this and throw new students in at the deep end, losing productivity and seeing higher drop-out as a result. A good first day includes a short introduction to the company and the team, a tour of the workplace, a clear explanation of tasks and expectations, instructions on safety and hygiene (where relevant), and the appointment of a fixed contact or buddy.

Bear in mind that student workers are usually young people with little work experience. Empathetic, clear communication without assumptions about prior knowledge delivers better results in the short term. Studies show that employees who go through structured onboarding stay with an organisation up to 69% longer. Even for short-term staff such as student workers, it pays to invest in that first day.

How much time does onboarding a student worker take on average?

Basic onboarding (including the administration, an introduction and the first task instructions) takes two to four hours on average. In more complex settings, such as logistics, care or hospitality, a full induction period can run to two complete working days. By using a fixed onboarding checklist and a buddy system you limit the time needed and ensure consistent quality, even when you are inducting several students at once.

What are the most common mistakes when onboarding student workers?

The most frequent mistakes are: filing the Dimona declaration late (or forgetting it), having the student employment contract signed only after the first working day, failing to track the hours quota so that the advantages lapse, and not appointing a clear point of contact. Another common mistake is treating students like ordinary employees and overlooking their specific needs: a need for clarity, structure and reassurance. Recruit a Student helps you set up an onboarding procedure that avoids all these pitfalls.

Conclusion: invest in a good start and reap the benefits for the rest of the season

Onboarding student workers deserves your full attention. Anyone with the administration in order, a well-organised first working day and a watchful eye on the hours quota has a significant advantage over employers who handle this ad hoc. You save time on the next assignment, avoid administrative fines and build a group of trusted students you can call on again and again.

Recruit a Student is the specialist in student work in Belgium, with personal contact, quality matching and full coverage from Antwerp to Bruges and from Ghent to Brussels. Our services cover temporary agency work, recruitment and selection, pool management and online agency work and payroll. We take the administration, the Dimona declarations and the tracking of the hours quota entirely off your hands, so that you can focus on your core business.

Would you like the onboarding of your student workers handled professionally?

Recruit a Student helps employers in Belgium find motivated young staff quickly and correctly and ensures flawless onboarding from A to Z: from the Dimona declaration and the student employment contract to induction support. In transport, logistics, cleaning, customer service, technical work and finance. From selection to contract: we arrange everything. Request a no-obligation conversation.

How does Recruit a Student handle the onboarding of your student workers?

Onboarding through Recruit a Student means that we select the right student for your company and also make sure everything runs correctly administratively and operationally. We file the Dimona declaration, draw up the student employment contract and watch the 650-hour quota, so that your team leaders can focus on the work floor rather than the paperwork.

In practice it works like this. We map out your roles, schedules and expectations and match the right student to your organisation. We make sure the contract is signed before the first working day, that the Dimona is filed correctly and that you have a point of contact for every question. If someone drops out because of exams or the end of their studies, we arrange a replacement from our database without you having to search or induct again.

The difference with arranging it yourself lies in continuity and certainty. Working out the administration each time means time, a risk of mistakes and potential fines. Through Recruit a Student you work with a proven onboarding process that is legally correct and in line with Belgian rules on student work.

Recruit a Student has been active since 2015, has offices in Antwerp and Brussels and works with a network of more than 500 students.

How to set up the onboarding of your next student worker this week

• Put the formalities on a checklist: Dimona before day one, contract signed before day one, hours quota checked. Without a checklist you rely on memory, and that goes wrong sooner or later.
• Appoint a point of contact before the first working day: a buddy who guides the student through day one. Without a clear contact the student disappears into the crowd and drops out sooner.
• Plan the first working day in a quiet period: let new students start at a moment when there is room to guide them, not in the middle of your busiest week.
• Use the Student@work app from day one: ask the student to check their balance so that you watch the 650-hour quota together. Transparency helps both sides.
• Leave the administration with your agency partner: Dimona, contracts and payroll do not belong with your team leaders. Delegate that to Recruit a Student, so that your own people stay available for the operation.

A student worker who is welcomed well performs better and stays longer. Administration that runs correctly saves you stress and money. The difference between smooth and awkward onboarding is made in the preparation, not on the day itself. Recruit a Student sets that process up for you, guides the student through the onboarding and takes over all the paperwork. One conversation is enough to see what your situation actually needs.

A student agency with national coverage and local expertise

Recruit a Student combines coverage across Belgium with the personal approach of a local agency. From our offices in the main student cities we help employers onboard student workers correctly and offer direct access to the local labour market. Our recruiters are active throughout Flanders and Brussels.

Ready to get the onboarding of your student workers right once and for all? Request a no-obligation quote and let us discuss straight away what your onboarding process needs.

Frequently asked questions about onboarding student workers

What are the compulsory steps when onboarding a student worker in Belgium?

The three legally compulsory steps are:

(1) filing the Dimona declaration of type STU before the first working day,

(2) drawing up the student employment contract and having it signed before the work starts, and

(3) watching the quota of 650 hours. In addition, a structured first working day with instructions on tasks, safety and points of contact is strongly recommended.

Do I have to file the Dimona declaration for student workers myself?

Yes, the Dimona declaration is a legal obligation of the employer. If you file late or not at all, you risk the employment being regarded as an ordinary employment contract, with the correspondingly higher NSSO contributions. If you work through Recruit a Student, we take care of the Dimona declaration for you.

How do I keep track of the 650-hour quota?

Through the NSSO’s Student@work app the student can check their balance in real time. As an employer you can also request the balance through the NSSO employer portal. Recruit a Student keeps track of the quota for you and flags it in good time when a student approaches the limit.

How quickly can I deploy a new student worker after hiring?

As soon as the Dimona declaration has been filed and the student employment contract has been signed, the student can start the same day. Through Recruit a Student this process runs smoothly: we make sure all the formalities are in order on time, so that the student is ready on the agreed start date. You will find more practical information in the frequently asked questions for employers.

Recruit a Student matches you with talented students who are glad to contribute to the growth of your company. We have a broad network of students in various sectors. Contact us without obligation to discuss the possibilities.