ObjectiveWe aimed to develop and validate a new emergency triage tool for use on patients with cancer undergoing palliative care (PC).MethodsIn phase I, the new tool was developed after literature review and expert committee meetings. A prospective longitudinal study in phase II assessed the interobserver reliability of the tool. In phase III, a retrospective study of administrative data, the feasibility of routine use of the new tool and the associations with hospitalisation and survival times were evaluated.ResultsThe palliative care triage system (PCTS) was composed of check-list items and four colour-coded categories for maximum response time. In phase II, the PCTS was independently evaluated by two nurses for 102 attendances in the emergency department of the PC unit. An absolute agreement of 87.3% and a weighted kappa of 0.81 were observed. In phase III, all 493 attendances had the PCTS assessment registered in the medical records. The PCTS categories were associated with hospital admission (pConclusionPCTS is a feasible tool to be used in routine ED triage of patients with advanced cancer undergoing PC. It is a valid instrument for predicting hospital admission rates and survival with high interobserver concordance rates.