We tested the across-time relationships between the person-based resources of assimilation (or goal pursuit) and accommodation (or goal adjustment) and two well-being outcomes (satisfaction with career progress and life satisfaction), and assessed if these relationships were mediated by self-perceptions (perceived goal attainability and optimism). Participants were 204 young adults (79% female; M [subscript age] 26 years), who were surveyed twice, 6 months apart. Consistent with the dual-process framework for goal management, assimilation was associated with more positive self-perceptions (attainability and optimism) and higher subsequent satisfaction with career progress and life satisfaction. Perceived goal attainability mediated between assimilation and the two satisfaction outcomes. Accommodation was associated with higher subsequent life satisfaction only. Thus, both assimilation and accommodation were related to better life satisfaction in young adults, but assimilation was more adaptive in the career domain.