What does a flexi-jobber or student cost an employer in 2025?

For many Belgian employers, flexi-jobbers and student workers are the go-to solution for bringing in staff quickly and flexibly. But what about the costs? Are they really cheaper than permanent employees or temp workers? In this article, we give a complete overview of the costs, with concrete figures for 2025.

1. Flexi-jobber: low costs, but not always straightforward

A flexi-jobber is a tax-friendly arrangement for employers. You pay:

• Gross wage = net wage: there are no taxes or social security contributions for the employee.
• Employer contribution = 25%: this solidarity contribution to the RSZ is the only extra you pay on top of the gross wage.

Calculation example (2025):

• Hourly wage flexi-jobber: €12.00
• Employer cost: €12 + 25% = €15.00/hr

Important: this only applies if the employee worked at least 4/5 in the previous quarter or is retired. Always check this through official channels.

👉 See also our frequently asked questions.

2. Student: cost-effective, but with a ceiling

Students work with a reduced RSZ contribution up to 650 hours per year. You pay:

• 2.71% RSZ for the student
• 5.42% RSZ for the employer

Once those 650 hours are exceeded, the regular social security contributions apply, just like with a permanent employee.

Calculation example (student with 650hr entitlement):

• Hourly wage student: €12.00
• Employer cost: €12 + 5.42% = €12.65/hr

Note: once the limit is exceeded, the costs suddenly rise sharply. So use a platform like AnyShift to keep proper track of the remaining hours.

3. Comparison with a regular employee or temp worker

Here you can see the costs in perspective:

• Flexi-jobber: Net = gross wage, RSZ 25%, very high flexibility, no notice period
• Student: Net = wage - 2.71%, RSZ 5.42%, high flexibility, no notice period
• Temp worker: Normal RSZ, 30-40% + agency margin, variable flexibility, notice via the agency
• Permanent employee: Normal RSZ, 35-50% total, limited flexibility, notice period applies

4. Which option do you choose as an employer?

It depends on your sector, needs and timing:

• Do you have peak moments such as weekends or seasonal rushes? Then flexi-jobbers are ideal.
• Do you work with young people during holiday periods? Students are cost-effective.
• Are you looking for sustainable deployability and experience? Then it pays to invest in a part-time or permanent member of staff.

5. How does AnyShift help?

As an employer, you do not have to check anyone's status or handle the administration yourself. Through our platform you get:

• Only candidates who are in order with RSZ/Student@work
• Real-time view of remaining hours
• Automatic matching with flexi-jobbers and students
• Less risk, faster onboarding

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