In this study, we utilise a comprehensive dataset from 41 countries spanning 2002–2013 and show that environmentally sustainable practices (ESP) are negatively associated with financial constraints of firms. We refine ESP into three components: emission reduction, product innovation and resource reduction, and show that firms which are more innovative and efficient in reducing wastage of resources are most benefited by ESP. The findings are even stronger for firms operating in countries with high institutional qualities, in high emission and highly competitive industries. These results are important to lending institutions for making financing decisions. Policymakers and investors could also utilise ESP as a key distinguishing factor for firms to benefit from lower financial constraints. Appropriate support and initiatives from local and national regulators could motivate firms to be more environmentally friendly.