In the last decade, digitalized automated decision-making (ADM) has been implemented in many Swedish municipal social services to achieve values such as legal security, client empowerment and time efficiency. The paper aims to understand how ADM policy is legitimized and performed through time efficiency, by a comparison of ADM policy in two Swedish municipalities’ social assistance agencies. It builds on 17 interviews with managers and professionals in two Swedish municipalities’ social assistance units. Findings show ADM is legitimized through arguments of activation and relationships, and performed by handling more applications or increasing time spent with clients, rather than being perceived as increasing the quality of social assistance services. This highlights the significance of organizational goals regarding how street-level bureaucrats perform tasks within their discretionary powers.