diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 54f965c..30b8c9a 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -222,7 +222,9 @@ int CALCULATE_LIBRARY_API compute_next_timestep(parking_tariff_t *tariff, int cu
 
     // use tariff with structure as for instance Schnau, Koenigsee:
     // without given YearPeriod, SpecialDays and SpecialDaysWorktime
-    if (paymentMethodId == PaymentMethod::Steps)
+    if ((paymentMethodId == PaymentMethod::Steps) ||
+        // progressive tariff: e.g. Neuhauser, Kirchdorf (743)
+        (paymentMethodId == PaymentMethod::Progressive))
     {
         const QList<int> stepList = Calculator::GetInstance().GetTimeSteps(tariff);
         qCritical() << "   compute_next_timestep()     timeSteps:" << stepList;