Every year, certain parameters used to calculate social security contributions are adjusted — thresholds, cost reductions, indexation of certain flat-rate amounts. These adjustments may seem technical, but they have a direct impact on the payroll cost you need to plan for.

Why these parameters change every year

The Belgian social security system includes periodic review mechanisms, in particular linked to automatic wage indexation and certain employment support measures decided at federal or regional level. These reviews affect both employer contributions and certain targeted reductions (first hires, low wages, specific sectors).

What an employer should check

  • Whether the contribution reductions you benefit from are still applicable to your situation
  • Whether your joint committee has published new sector scales
  • Whether automatic wage indexation has been triggered in your sector
  • Whether your tools or payroll provider are correctly applying the up-to-date parameters
In practice, these changes are rarely dramatic when taken individually — but added up across a team of several people, they can represent a significant budget difference over the year.

How LexPay handles this monitoring

We factor these adjustments directly into your payslip calculations, with no action required on your part. If a change could affect your salary strategy — for example, a cost reduction you might now be entitled to — we proactively inform you.

This article is intended for general information purposes only and does not constitute personalised legal advice. As every situation is different, please contact our team for advice tailored to your business.