diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index b85d196..986dadf 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -707,10 +707,16 @@ Ticket Calculator::private_GetDurationFromCost(Configuration *cfg,
                     if (!IsYearPeriodActive(cfg, current)) {
                         return Ticket();
                     }
-                    if(durationMinutesNetto > maxParkingTimeMinutes) {
-                        durationMinutesNetto = maxParkingTimeMinutes;
-                        break;
-                    }
+                    // if(durationMinutesNetto >= maxParkingTimeMinutes) {
+                    //  might be useful for overpayment
+                    //    durationMinutesNetto = maxParkingTimeMinutes;
+                    //    int durationMinutesBrutto = start.secsTo(end) / 60;
+                    //
+                    //    return
+                    //        Ticket(start, end, durationMinutesNetto,
+                    //               durationMinutesBrutto, cost, Ticket::s[INVALID_PRICE]);
+                    //
+                    // }
                     if(current.time() >= lastWorktimeTo) {
                         // Go to next day if minutes not spent
                         if (carryOverNotSet) {
@@ -722,11 +728,20 @@ Ticket Calculator::private_GetDurationFromCost(Configuration *cfg,
                     } else {
                         if(current.time() < worktime_to) {
                             // Increment input date minutes for each monetary unit
-                            durationMinutesNetto +=1;
+                            durationMinutesNetto += 1;
                             moneyLeft -= price;
                             moneyLeft = std::round(moneyLeft * 1000.0) / 1000.0;
                             current = current.addSecs(60);
-                            end = current;
+
+                            //qCritical() << "moneyLeft" << moneyLeft
+                            //            << "durationMinutesNetto" << durationMinutesNetto
+                            //            << "current" << current.toString(Qt::ISODate);
+
+                            if(durationMinutesNetto <= maxParkingTimeMinutes) {
+                                // stop updating of end-date if parking time is
+                                // overshot
+                                end = current;
+                            }
                         } else break;
                     }
                 } // while(durationMinutes > 0) {
@@ -734,7 +749,7 @@ Ticket Calculator::private_GetDurationFromCost(Configuration *cfg,
         } // for (int w = currentRange; w < ranges; ++w, ++totalTimeRanges) {
     } // for (current = start; durationMinutes > 0; current = current.addDays(1)) {
 
-    int durationMinutesBrutto =  start.secsTo(end) / 60;
+    int durationMinutesBrutto = start.secsTo(end) / 60;
 
     //qCritical() << "start" << start.toString(Qt::ISODate) << "end"
     //            << end.toString(Qt::ISODate) << durationMinutesBrutto;