Background/Aim: Breast cancer treatment represents a substantial amount of health-care costs and has negative impact on womens' psychological health. Day-Surgery managment (DS) is a favorable alternative to a classic inpatient setting. In our prospective study we evaluated DS-treatment feasibility in terms of patient satisfaction, same-day-discharge rate, surgicalreintervention rate, psychological impact and costs. Patients and Methods: We operated on 131 early breast cancer patients in DS. Surgical outcomes were evaluated. In 64 DStreated breast cancer patients, psychological outcomes were analyzed using validated psychometric questionnaires and comparison was made with a corresponding group of women treated as inpatients. Results: The same-day-discharge rate was 95.4%. No patient required readmission. The surgicalreintervention rate was 6.2%. DS-treatment significantly reduced anxiety (p=0.05) and depression (p=0.01) and afforded cost savings of 49%. Conclusion: DS-treatment of early breast cancer was feasible, with low reintervention rate, reduced anxiety and depression, high patients' satisfaction and substantial financial savings.