Introduction: This study aimed to assess the effect of integrated palliative care (IPC) on potentially inappropriate end-of-life care and healthcare-costs in the last 30 days of life in the Netherlands. Methods: Nationwide health-insurance claims data were used to assess potentially inappropriate end-of-life care (≥2 emergency room visits; ≥2 hospital admissions; >14 days hospitalization; chemotherapy; ICU admission; hospital death) and healthcarecosts in all deceased adults in IPC regions pre-and post-implementation and in those receiving IPC compared to a 1:2 matched control group. Results: In regions providing IPC deceased adults (n = 37,468) received significantly less potentially inappropriate end-of-life care post-implementation compared to pre-implementation (26.5% vs 27.9%; p < 0.05). Deceased adults who received IPC (n = 210) also received significantly less potentially inappropriate end-of-life care compared to a matched control group (14.8% vs 28.3%; p < 0.05). Mean hospital costs significantly decreased for deceased adults who received IPC (€2,817), while mean costs increased for general practitioner services (€311) and home care (€1,632). Discussion: These results highlight the importance of implementation of integrated palliative care and suitable payment. Further research in a larger sample is needed. Conclusion: This study shows less potentially inappropriate end-of-life care and a shift in healthcare costs from hospital to general practitioner and home care with IPC.