Within a sustainable supply chain management approach, this study investigates strategic issues that can either favour or impede the implementation of natural capital accounting. Among other things, the originality of such consists of the joint consideration of sustainability, operational, and reputational issues, forging the link between measuring the use of natural resources and preserving companies' intangible capital. More specifically, through two scenario-based behavioural experiments with a total sample of 252 consumers in the UK, we analyse how information regarding the use of water (i.e., water footprint) affects firms' reputation (i.e., trust, attitude towards the firm, word-of-mouth, brand avoidance). We also investigate consumers' perceptions when companies seek to (1) increase the transparency of their consumption of natural capital (i.e., a conceptual proxy for the adoption of natural capital accounting) and (2) rationalize this consumption (i.e., a goal aligned with the objectives of natural capital accounting). The method employed is adequate as it allows the detection and measurement of respondents' perceptions of specific issues presented in the different scenarios. The choice of the UK as the setting reflects the importance of the country in the fashion industry, as it has a solid consumer base and is home to several international fashion brands. The supply chain management scope refers to the link between water consumption (which often takes place in the production of raw materials (e.g., cotton) and in transformation processes (e.g., fabric dyeing, tanning) by suppliers), fashion brands' reputation, and consumers' perceptions, with the joint consideration of these four phases sustaining the delimitation. Building on the premises of the resource-based view and signalling theory, the study is contextualized in the fashion industry as its current production levels require a significant consumption of natural resources, particularly water. Results show that, while the publication of the water footprint may damage companies’ reputations, initiatives aimed at increasing transparency and reducing environmental impact can reverse these losses to a large extent. In this sense, the study advances the idea that, despite possibly presenting undesirable consequences at first, the adoption of natural capital accounting can be beneficial to firms later on, with reputational gains representing important strategic incentives. Further research in different countries and industries will be beneficial to assess the possible context impact on our results.