PurposeThis study investigates the impact of bank CEOs’ inside debt on shareholder benefits in the context of bank mergers and acquisitions (M&A) before the 2008–2009 financial crisis.Design/methodology/approachEmploying an event-study methodology, this analysis delves into market reactions to bank M&A announcements during 2006–2007, encompassing 105 M&As by 79 public commercial banks. This era witnessed heightened risk-taking behavior on the verge of the financial crisis. We explore the relation between relative inside debt and market abnormal returns at M&A announcements and the association between relative inside debt and cash payment preferences in M&As.FindingsEvidence suggests that M&A announcements from banks where acquiring CEOs hold a substantial inside debt experience favorable stock market reaction, particularly for smaller banks. Additionally, banks with elevated CEO inside debt tend to favor cash as a payment mode for M&As.Research limitations/implicationsOne limitation of this study is the short period of data availability. The data used in this study covers only 2006 and 2007, the periods marked by notable risk-taking activities on the verge of the financial crisis. Although this period is perfectly suitable for our investigation, given the prevalence of conflicts between equity and debt holders, it is essential to acknowledge that our findings may not capture changes or trends over time. Nevertheless, the results offer valuable insights into the factors that influence the behavior of the studied population. Future research could employ a longitudinal design to address this limitation and gain a more comprehensive understanding of the dynamics over extended periods.Practical implicationsOur study has significant implications for businesses and policymakers as it provides insights into the factors contributing to financial crises and how compensation mechanisms can be used to moderate bank risk-taking. We propose that CEO inside debt compensation presents a plausible mechanism that boards of directors can incorporate into bank executive compensation contracts. By doing so, they can promote value-enhancing investments and moderate excessive risk-taking, thereby safeguarding the financial stability of individual banks and overall financial system.Originality/valueOur study sheds light on the beneficial role of bank CEO inside debt for shareholders, contributing empirical backing to the conflict resolution viewpoint in the discourse on wealth appropriation. From a regulatory stance, our findings advocate for the inclusion of bank CEO inside debt in executive remuneration agreements. Such a strategy can empower boards of directors to mitigate undue risk and enhance shareholder value in M&As, safeguarding both individual bank and broader financial system stability.