PurposeIn this study, I explore how climate exposure influences debt maturity and whether the life cycle moderates this relationship.Design/methodology/approachThis study employs robust panel fixed-effects regression models on 32,249 firm-year observations over 2002–2022. The meticulous examination of the relationship between climate exposure and debt maturity and the use of IV regression models to address endogeneity ensure the validity and reliability of the findings. Exploiting an external shock to validate the results further enhances the robustness of the analysis.FindingsThe study reveals that climate change exposure significantly negatively affects debt maturity, a finding that holds for both climate-related opportunities and regulatory risks. While the life cycle impacts debt maturity, it exacerbates the negative effect for firms in the introductory and growth phases. This exacerbation is due to underinvestment problems and a lack of financial flexibility. These findings shed new light on the relationship between climate exposure and debt maturity, providing valuable insights for corporate finance professionals and strategic managers.Practical implicationsThe evidence presented in this study has strategic implications for corporate managers, investors, academia and other stakeholders. The insights on the choice or substitution of debt maturity during certain life cycle phases can provide valuable guidance to management, empowering them to make informed decisions.Originality/valueThe dynamic role of the corporate life cycle in the relationship between capital structure and climate exposure is a novel area of research. This paper significantly contributes to our understanding of the combined relationship of firm life cycle and climate exposure on debt maturity, offering a fresh perspective on an underexplored topic. This study’s unique approach and original findings will pique the interest of academic researchers and corporate finance professionals alike.