Graduate programs prepare mental health clinicians to provide care. Most do not prepare them for the structural realities of professional practice. The operational, financial, and systemic dimensions of independent clinical work are rarely addressed in graduate curricula, and the gap between clinical training and practice readiness has measurable consequences for clinicians and the populations they serve. Foundations of Practice Ownership for Mental Health Clinicians treats practice ownership as a teachable professional competency, one that can be studied, developed, and applied across the full arc of a clinical career. Across twenty-four chapters, the text examines the systems that shape independent clinical work: the landscape of practice models and their structural implications, financial infrastructure and fee structure design, documentation as a legal and clinical competency, referral development and professional communication, specialization and its developmental sequencing, technology and telehealth as structural components of contemporary practice, cultural context and access as practice design considerations, and long-horizon planning for clinicians who intend to build something that holds up over time. The text draws on systems thinking, developmental theory, and applied ethics to build a framework for understanding practice not as a business problem but as a professional infrastructure problem, one that requires the same rigor and preparation as clinical competence itself. Case illustrations throughout the text ground conceptual material in the kinds of decisions clinicians actually face, from early career pathway choices to the structural recalibration that experienced clinicians require when their practice no longer fits the work they want to do. Designed for master's-level programs in mental health counseling, social work, marriage and family therapy, and psychology, this text introduces a rigorous and teachable framework for practice readiness as a core component of clinical education. It is appropriate for use as a primary course text in practice management, professional development, or clinical business courses, and as a supplementary text in practicum and internship sequences where operational preparation is addressed alongside clinical skill development.