diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index 97dec43..efee9fa 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -525,14 +525,17 @@ double Calculator::GetCostFromDuration(Configuration* cfg,
                 }
             }
 
-
             if (current.time() >= to) {
-                QDateTime const dt = start;
-                start = start.addDays(1);
-                start.setTime(QTime(0, 0, 0));
+                if (carryOverNotSet) {
+                    return 0;
+                } else {
+                    QDateTime const dt = start;
+                    start = start.addDays(1);
+                    start.setTime(QTime(0, 0, 0));
 
-                durationMinutesBrutto += dt.secsTo(start) / 60;
-                current = start;
+                    durationMinutesBrutto += dt.secsTo(start) / 60;
+                    current = start;
+                }
             } else {
                 break;
             }