Abdominal paracentesis is a frequently employed diagnostic and therapeutic procedure for patients with refractory ascites, typically in patients with cirrhosis. It is generally regarded as a safe procedure with significant complications occurring in <1% of cases. Most hemorrhagic complications are due to abdominal wall trauma, during which clear evidence of active bleeding is usually visualized during the procedure. Delayed hemoperitoneum is a rare complication of large-volume paracentesis in which clinical evidence of active bleeding is typically absent until substantial blood loss has taken place (often several days to a week later), leading to an exceedingly high mortality rate. Herein we describe a case of delayed hemoperitoneum in a 55-year-old man with heart failure. This case emphasizes the importance of identifying patients who are at high risk for delayed hemoperitoneum as well as the need to closely monitor complete blood counts in the days following a large-volume paracentesis.