Purpose: The aim of the paper is to identify potential factors that influence the relative size of environmental compliance costs through a literature review and propose a conceptual holistic model of the indirect impact of these factors on companies’ productivity levels. In the literature, the connection between costs associated with environmental regulation and companies’ productivity has been thoroughly tested within what is known as the Porter hypothesis, or simply PH. Design/methodology/approach: The paper applies the methods of integrative review of scientific literature and qualitative research with a document study. Findings: The results point to several key findings. First, the identified potential factors can be divided into t...