Purpose <p>Palliative care is delivered across most healthcare settings, yet service capability remains poorly defined, limiting quality improvement. A clearer definition is essential to drive system-wide improvement. This scoping review was undertaken to answer two important questions: What are the key constructs that define palliative care service capability, and how can they inform quality improvement and benchmarking?</p> Methods <p>A scoping review, retrieving studies from Medline, PsycINFO, and CINAHL. This scoping review was conducted in accordance with the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for scoping reviews (PRISMA-ScR). Relevant literature published in English from the year 2000 onwards, focusing on palliative care service delivery, standards, quality, and outcomes were included. Data were organised using an evidence map to define service capability and develop a conceptual framework.</p> Results <p>Palliative care service capability is defined as the ability of a service to deliver care, shaped by the broader health system and organisation in which the service operates. Four core domains emerged as central to the concept and were mapped against existing standards, quality indicators and clinical frameworks: (1) assessment, planning, and care provision; (2) transitioning patients between services; (3) availability of care; and (4) collaboration and linkages across health services involved in delivering palliative care.</p> Conclusion <p>This review provides a definition and conceptual model for palliative care service capability to support quality assessment and facilitate meaningful benchmarking. Integrating this framework into national quality initiatives may help identify gaps in service and system delivery, standardise care processes, and enhance patient-centred outcomes.</p>