The real cost of a flexi-job to a Belgian employer is the flexi-wage you agree, plus a 28% employer social security contribution on top of it, plus flexi holiday pay. The worker pays 0% in contributions and, up to the annual tax-free threshold, keeps almost all of it, which is why flexi-jobs are attractive on both sides. The number that matters for budgeting is the loaded hourly cost, and that number is only trustworthy if your hours are exact. Suivo’s workforce management solutions tie every paid hour to a verified shift, so the cost you model is the cost you actually pay.
What are the components of flexi-job cost?
A flexi-job cost stacks in three parts, and it helps to see them separately:
- The flexi-wage. The gross hourly rate you agree with the worker, subject to the sector wage cap (around €21/hour in horeca; 150% of the sectoral minimum elsewhere).
- The 28% employer contribution. On top of the flexi-wage you pay a special employer social security contribution of 28%. This is the flexi regime’s headline cost and it replaces the heavier ordinary employer contributions.
- Flexi holiday pay. Holiday pay is added on top of the flexi-wage, commonly around 7.67% of it. It is part of what the worker earns and therefore part of what you fund.
The worker side is deliberately simple: 0% worker contribution, and flexi-income is tax-free up to the annual threshold for non-retired workers (legally retired workers can earn unlimited flexi-income). Their gross is close to their net, which is the recruitment advantage flexi-jobs give you.
How does that compare to standard employment?
Compared qualitatively (do not treat these as your exact payroll figures, your social secretariat produces those), the structures differ in more than the rate:
- Employer contributions. Standard employment carries ordinary employer social security contributions in the region of 27% in general terms, broadly similar in headline percentage to the flexi 28%. The real difference is what surrounds it.
- Tax withholding. On a standard wage you withhold professional withholding tax; on a flexi-wage, below the threshold, there is effectively none. That is why a flexi worker accepts a lower gross for a similar net.
- Accrued costs. Standard employment builds up holiday pay, end-of-year premium (thirteenth month where applicable), and other sector entitlements over time. A flexi-job folds holiday pay in at a fixed, visible rate and avoids much of the accrued overhang.
- Administrative load. Flexi-jobs demand a DimDay before every shift and mandatory electronic time registration, so the compliance effort per hour is higher even where the euro cost is lighter.
The honest summary: a flexi-job is not automatically “cheaper per euro of contribution”. It is more predictable and lighter on accrued and net-to-gross overhead, which is where the saving usually sits, in exchange for tighter per-shift compliance.
A worked example in euros
Take a flexi-wage of €15.00/hour for a worker in a sector using a rate below its cap.
- Flexi-wage: €15.00
- Flexi holiday pay at 7.67%: €1.15
- Base for the employer contribution (wage + holiday pay): €16.15
- Employer contribution at 28%: €4.52
- Total employer cost per hour: about €19.32
So a €15/hour flexi-wage lands near €19.30 all-in. For a worker doing 12 hours across a busy weekend, that is roughly €232 in total employer cost. Meanwhile the worker, paying 0% contributions and (below the threshold) no tax, takes home close to the full €15 plus holiday pay per hour, a net that standard employment struggles to match at the same gross.
Two caveats worth stating plainly. First, exact percentages are indexed and confirmed by your social secretariat, so treat the 7.67% and 28% as the current structure, not a frozen guarantee. Second, the moment your wage exceeds the sector cap, the excess loses flexi status and attracts normal contributions, which quietly changes the maths, another reason the wage you enter has to be right.
Why do accurate hours decide the real cost?
Every figure above is per hour, so the total is only as accurate as the hours you count. If shifts are rounded up, estimated, or transcribed from paper into payroll days later, your cost is an approximation and, worse, your compliance is exposed. Since 1 July 2026, electronic time registration is mandatory for flexi-job employers, and from 1 January 2027 it becomes mandatory for all employers, so precise hours are both a cost-control tool and a legal obligation.
A connected platform turns cost from an estimate into a controlled number:
- Exact per-shift capture via mobile app, badge, fixed check-in poles or vehicle-based clock-in removes the rounding and the guesswork.
- [Time tracking](https://www.suivo.com/solutions/time-tracking/) produces payroll-ready hours per worker and per project, so you can see cost by cost centre, not just in aggregate.
- [API integrations](https://www.suivo.com/solutions/api-integrations/) push those hours straight to Liantis, Securex, Partena, Group S or SD Worx, so the hours you costed are the hours that get paid, with no re-keying and no drift.
- One platform replaces the spreadsheet-plus-paper reconciliation where cost overruns and compliance gaps usually hide.
For the surrounding rules, see the flexi-job wage cap for 2026 and the €18,440 tax-free threshold. The full context is in the complete 2026 employer guide. Confirm contribution figures against the NSSO at socialsecurity.belgium.be.
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