This article proposes an adaptation to couple therapy of the Plan Formulation Method, an empirically validated and clinically useful assessment procedure for planning case-specific psychotherapy interventions. According to Control-Mastery Theory (CMT), individuals who seek psychotherapy have an unconscious plan, which comprises goals, obstructions, tests, traumas, and insights. The Plan Formulation Method was developed to reliably formulate individual psychotherapy cases. To apply this method to couples therapy, we have added two components: dysfunctional relationship patterns (vicious relational circles) and resources (virtuous relational circles). Each component will be explained with the help of a clinical case. We discuss the implication of the use of the Plan Formulation Method for couples and compare some of the tenets of CMT applied to couples with the main approaches to couple therapy.