Introduction: The reported complications rates following implantation of Cardiac Implantable Electrical Devices (CIED) are highly variable. International multicentre series have reported complication rates that exceed rates quoted by individual implanters. This is a multicentre series of consecutive device implants to provide a contemporary Australian analysis of device complications. Methods: The Genesis Cardiovascular Outcomes Registry (GCOR-Device) prospectively collected data on all patients from December 2015–December 2018. The externally housed database contains demographic, procedural and 12 month follow up details on all patients receiving a CIED. All complications following implantation are listed and independently assessed as major or minor. Major complications were defined using updated criteria as any that required intervention, prolonged hospitalisation, intravenous drug therapy, resulted in device malfunction or programming that limited device function. Results: 5000 patients were included in the analysis. The complication rates at 30 days were 3.1% major and 5.5% overall. 12 month mortality following CIED was 2.9%. The predictors of complications were an inpatient compared to an elective implant, a history of heart failure and implantation of a cardiac resynchronisation device. 420 (8.6%) patients had a readmission in the 12 months following device implantation. This was a cardiac readmission in 174 (3.4%) patients and device related in 21 patients. Conclusions: In this multicentre, contemporary Australian device database the overall complication rates and readmission rates compare favourably with published series.