"With The Toxicity Tax, Claire Feagley offers keen insights into the origins of behaviors that undermine or prevent the establishment of the kind of high-performance culture that can differentiate companies from their peers and competitors, while creating a road map for the kind of analytical thinking necessary for introspection and remediation of cultural issues." — Mike Hatcher Advisory Council Member, Global Special Operations Forces Foundation

"I first met Claire Feagley when she was just stepping into the world of mergers and acquisitions—wide-eyed about the complexity of deal dynamics but already asking the questions most M&A practitioners never think to ask: What is this doing to the people inside these organizations? That curiosity has grown into a brilliant, unflinching book. The Toxicity Tax does something rare—it connects the invisible cost of dysfunction to both the human beings who carry it and the organizations that pay for it, often without ever seeing the invoice. For anyone working in high-stakes environments like M&A, where culture clash can kill deal value, this book is essential reading. What sets Claire apart is that she doesn't just diagnose the problem—she traces it to its roots and hands you tools to rewrite the story. Her blend of psychological rigor, executive coaching experience, and personal honesty makes The Toxicity Tax as therapeutic as it is practical." — Jennifer J. Fondrevay Founder & Chief Humanity Officer, Day1 Ready M&A Consultancy

"The Toxicity Tax compassionately names what many leaders feel but rarely say out loud—the hidden personal, relational, and economic costs of normalized dysfunction. Drawing on deep psychological insight and real-world experience, Claire Feagley, PhD, offers a clear, humane guide for recognizing toxic patterns and choosing a healthier way forward. This book belongs on the desk of anyone serious about sustainable leadership and culture." — Bill Pullen Former Academic Director, Institute for Transformational Leadership, Georgetown University