Objective: The Adaptive Behaviour and Community Competency Scale was used to investigate the interrelationship of 22 basic and instrumental activities of daily living (ADL/IADL) in individuals with moderate to severe traumatic brain injury (TBI). The relationship of self-awareness to task performance was also investigated. Research design: Prospective descriptive study. Method: The profiles of 100 community dwelling individuals were used to compare the degree to which independence in each ADL/IADL was associated with independence in every other ADL/IADL. The interrelationship of these skills was further explored in a factor analysis, and comparisons made between the degree of self-awareness of those who could and could not complete IADL independently. Results: We found evidence of a hierarchy of skills: individuals who were independent in IADL were more able to perform ADL, than vice versa. Factor analysis supported a two-factor solution distinguishing ADL and IADL. Self-awareness was more strongly associated with IADL than with ADL independence. Conclusions: A subset of individuals with moderate to severe TBI are able to perform a range of IADL. This group appears to have higher levels of self-awareness than those who are limited to performing only ADL skills. Implications for the applications of functional retraining interventions are discussed.