diff --git a/src/calculation_time_constrains/service.py b/src/calculation_time_constrains/service.py
index c8e2d0b..f44480c 100644
--- a/src/calculation_time_constrains/service.py
+++ b/src/calculation_time_constrains/service.py
@@ -139,11 +139,6 @@ class ReliabilityService:
             last_day = calendar.monthrange(current.year, current.month)[1]
             last_day_date = datetime.datetime(current.year, current.month, last_day)
 
-            if month_count == 0:
-                cumulative_failures = 0
-                results[last_day_date] = round(cumulative_failures, 3)
-                month_count += 1
-                continue
 
             # Stop if we've passed the end_date
             if last_day_date > end_date:
@@ -172,7 +167,7 @@ class ReliabilityService:
             cumulative_failures += monthly_failures
 
             # Store cumulative value rounded to 3 decimal places
-            results[last_day_date] = round(cumulative_failures, 3)
+            results[last_day_date] = round(cumulative_failures, 3) if month_count > 0 else 0
 
             # Move to next month
             month_count += 1