diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 038e399..c3ac388 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -428,14 +428,23 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
         return calcState.set(CalcState::State::SUCCESS);
     }
 
+    double cost = -1;
     if (start_parking_time.isValid()) {
-        double cost = Calculator::GetInstance().GetCostFromDuration(
+        if (tariff->getPaymentOptions().pop_payment_method_id == PaymentMethod::Steps) {
+            calcState = Calculator::GetInstance().isParkingAllowed(tariff, start_parking_time);
+            if (calcState.getStatus() == CalcState::State::OUTSIDE_ALLOWED_PARKING_TIME) {
+                return calcState;
+            }
+            cost = Calculator::GetInstance().GetCostFromDuration(tariff, start_parking_time, netto_parking_time);
+        } else {
+            cost = Calculator::GetInstance().GetCostFromDuration(
                         tariff,
                         tariff->getPaymentOptions().pop_payment_method_id,
                         start_parking_time,         // starting time
                         end_parking_time,           // return value: end time
                         netto_parking_time,         // minutes, netto
                         false, prepaid);
+        }
         double minCost = tariff->getPaymentOptions().pop_min_price;
         if (cost < minCost) {
             calcState.setDesc(QString("minCost=%1, cost=%2").arg(minCost, cost));
@@ -445,8 +454,10 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
         // DEBUG
         qCritical() << "               -> calculated cost (price->netto) =  " << cost;
 
+        price->brutto = price->vat = price->vat_percentage = 0;
         price->units = cost;
         price->netto = cost;
+
     } else {
         return calcState.set(CalcState::State::INVALID_START_DATE);
     }