From a legal perspective, directives are not generally applied directly between private parties; they also first need to be transposed into national law. This means that, today, employees in Belgium will generally not be able to rely directly on the Directive against their employer. But that does not mean there is no risk.
Broader EU principles, including the principle of non-discrimination under Article 21 of the EU Charter, remain relevant. Belgian courts may also be asked to interpret existing national law as far as possible in line with the Directive. In other words: the legal framework is still uncertain, but the direction of travel is not.
Pay transparency is coming. It will require organizations to explain how pay is set, how pay progresses, and how differences between employees doing the same work or work of equal value can be objectively justified. This is not only a legal compliance exercise. It is also a test of reward governance, data quality, leadership alignment, and employee trust.