Traditionally, peritoneal dialysis (PD) consists of PD catheter placement and initiation training after a 2-4 weeks interval. Recently, with the advancement of surgical technic, low infusion volume, and automated dialysis prescription, urgent-start PD could be used for unplanned renal replacement therapy. In comparison with urgent-start hemodialysis, urgent-start PD has less risk for bacteremia and shorter hospitalization. The possible complication of urgent-start PD included minor leakage and possible need for surgical intervention. The infection risk is not statically different between standard break and in urgent-start PD group. In conclusion, urgent-start PD seems to be a safe and an alternative to unplanned hemodialysis for patient with end-stage renal disease.