Background: In the era of cytotoxic chemotherapy, aggressive cancer treatment and hospitalization at the end of life (EOL) has been associated with a worse quality of death. Meanwhile, in the era of immunotherapy (IO), little is known of the impact of these novel agents on EOL care. The aim of this study was to evaluate the EOL care of metastatic cancer patients treated with immune checkpoint inhibitors. Methods: We conducted a retrospective analysis of patients prescribedPD1/L1 or CTLA-4 antibodies in Cork University Hospital (CUH) and Mercy University Hospital (MUH) between January 2013 to December 2018. Patients treated on a clinical trial were excluded. Results: We identified 224 patients treated with immune checkpoint inhibitors (outside of a clinical trial) in CUH and MUH over the described 6 year period. 108 of these patients were deceased, 102 electronic files were available for analysis. Of the 102 patients, 57 had metastatic melanoma, 33 non small cell lung cancer, 8 renal cell carcinoma, 4 had other advanced malignancies. 43% were female and 57% were male. 6% of patients had an ECOG performance status (PS) of 0 at diagnosis, 80% PS of 1 and 10% PS of 2. Median age at death was 62 years. 47 patients were treated with pembrolizumab, 26 nivolumab, 25 ipilimumab, 2 nivolumab/ipilimumab and 2 received atezolizumab. 29 patients received IO as first line treatment, 50 as second line, 17 as third line and 6 as fourth line. Median number of IO cycles received was 4 (range 1 - 41). Progression of disease (62%) and declining performance status (14%) were the most common reasons for discontinuation of IO treatment. 16 of the 102 patients received a further line of systemic therapy. Median time from last dose of IO to death was 57 days. 20 patients (20%) died within 30 days of last dose of IO. Of these 20 patients, the median number of cycles of IO received was 2 (range 1-7), 8 of these 20 patients received one cycle of IO only. 39 patients (38%) attended the ED in the last month of life. 47 (46%) patients had at least one hospital admission in the last month of life, the median hospital length of stay was 6 days (range 1-30) and 22 patients died in hospital. 94% of patients were referred to palliative care, the median time from palliative care referral to death was 64 days (range 1- 1010), 62% of patients died in hospice. Conclusions: Patients with advanced cancer treated with immunotherapy have high rates of hospital admissions and ED attendances despite early palliative care involvement. 20% of patients died within 30 days of IO. More research is needed to help physicians identify patients who are least likely to benefit from IO so as not to treat futile cases.