Career counseling has evolved to include practices that attribute a central importance to context variables and meaning‐making processes. Accordingly, there is a need for client assessment tools that consider the subjectivity and cultural specificity of clients and the interface between their work and life concerns. The idiographic assessment of outcomes, which uses individualized measures that involve clients in the definition of person‐specific items, is a promising approach. This article explores the use of the Personal Questionnaire (PQ) as an individualized outcome measure that complements standardized outcome career measures. The authors identify the factors leading to the emergence of idiographic assessment in career counseling, review existing research relevant to the need for the PQ, and present a case study of career construction counseling that illustrates how the PQ helps counselors to obtain sensitive and contextualized assessments of career counseling outcomes, guides interventions, and facilitates meaning making.