Background and Objective: Palliative radiotherapy (PRT) practice patterns among radiation oncologists are heterogeneous. Appropriate selection of PRT regimen must balance symptom/disease control with patient quality of life. The aim of this review is to summarize prognostic scoring systems for PRT in order to help guide clinical decision making and selection of appropriate PRT regimens., Methods: A PubMed search was conducted for articles published between 01/2000 and 07/2023. Standardized search terms including "palliative", "radiotherapy" and "survival" were used. Only English-language, peer-reviewed articles that presented a prognostic scoring system of PRT were included in this review., Key Content and Findings: In this study, we review the published literature on prognostic scoring systems for patients treated with PRT. Multiple models have been developed and each pertains to a specific patient population or primary tumor type. While they are specific to a particular patient population, all models incorporate patients' clinical characteristics such as primary site, performance status, location of metastatic disease, and indication for PRT to estimate overall survival (OS) after PRT. For each model, the salient points of the scoring system are described. Based on survival estimates from each prognostic system, different PRT regimens are recommended., Conclusions: PRT scoring systems can be used to help clinicians assess patient prognosis. With the information provided by the included studies, radiation oncologists will be better prepared to formulate an optimal, individualized treatment plan for patients to be treated with PRT.