Abstract
The issue raised in the article focuses on setting a boundary of admissibility regarding equal treatment of workers employed part-time in relation to workers employed full-time. Remarks based on judgement C‑660/20 focus on pointing out an admissible scope of unification of conditions which need to be met in order to receive additional payment concerning workers employed part-time and comparable workers employed full-time, and determining the consequences of the aforementioned judgement for the national law.