Environmental performance assessment of products is necessary to improve sustainability in supply chains. Life-cycle assessment and its optional normalisation step may be used for this purpose. Based on an illustration, this paper studies the most recent International reference Life-Cycle Data system (ILCD) normalisation factors and compares them with the most commonly used normalisation factors given by CML and ReCiPe H methods. Normalisation with ILCD shows differences in the results, compared to normalisation with older methods, which may have consequences on business decisions. Indeed, some impact categories are undervalued with old methods because their factors are not up to date. We conclude on the importance of using the latest methods to assess environmental impacts, and on the need to link these approaches or metrics with supply-chain performance evaluation models.