Objective: Compare maternal and perinatal outcomes between emergency and elective caesarean-hysterectomy for placenta accreta spectrum (PAS) disorders managed by a multidisciplinary team. Design and setting: Single-centre retrospective cohort study Population: 125 cases of antenatally suspected and pathologically confirmed PAS disorder. Methods: Maternal and perinatal outcomes were analyzed. Multivariate logistic regression was used to test associations, adjusting for potential confounders. Survival curves exploring risk factors for emergency delivery were sought. Main Outcome Measures: Maternal outcomes including hemorrhagic morbidity, operative complications. Perinatal outcomes included gestational age at delivery, birthweight, Apgar scores and perinatal death. Results: 25 (20%) and 100 (80%) patients had emergency and elective delivery, respectively. Emergency delivery had a higher estimated blood loss (median IQR 2772 [2256.75] vs. 1561.19 [1152.95], p<0.001), with a higher rate of coagulopathy (40 vs. 6%; p<0.001) and bladder injury (44 vs. 13%; p<0.001). Emergency delivery was associated with increased rates of blood transfusion (aOR 4.9, CI95% 1.3-17.5, p=0.01), coagulopathy (aOR 16.4, CI95% 2.6-101.4, p=0.002) and urinary tract injury (aOR 6.96, CI95% 1.5-30.7, p=0.01). Gestational age at delivery was lower in the emergency group (mean SD 35.19 [2.77] vs. 31.55 [4.75], p=0.001), no difference in perinatal mortality was found (aOR 0.01, CI95% <0.001-17.5, p=0.53). A sonographically short cervix and/or history of APH had an increased cumulative risk of emergency delivery with advancing gestational age. Conclusions: Patients with PAS disorders managed in a tertiary centre by a multidisciplinary team requiring emergency delivery have increased maternal morbidity and poorer perinatal outcomes than those with elective delivery.