diff --git a/cli.py b/cli.py
index fdb4315..d7c6106 100755
--- a/cli.py
+++ b/cli.py
@@ -23,7 +23,10 @@ def get_total(transaction):
 
 
 def get_income(event):
-    return sum(get_total(t) for t in event.transactions)
+    if event.transactions:
+        return sum(get_total(t) for t in event.transactions)
+    else:
+        return 0
 
 
 @click.group()