diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 344ffc8..610263c 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -338,7 +338,9 @@ int CALCULATE_LIBRARY_API get_maximal_parkingprice(Configuration *cfg,
 
     switch(permitType) {
     case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
-        if (paymentMethodId == PaymentMethod::Progressive || paymentMethodId == PaymentMethod::Steps) {
+        if (paymentMethodId == PaymentMethod::Progressive
+         || paymentMethodId == PaymentMethod::Steps
+         || paymentMethodId == PaymentMethod::Unified) {
             //maxPrice = Utilities::getMaximalParkingPrice(cfg, paymentMethodId);
             ATBPaymentOption const &po = cfg->getPaymentOptions(paymentOptionIndex);
             maxPrice = po.pop_max_price; // maxTime is given in minutes
@@ -518,6 +520,9 @@ int CALCULATE_LIBRARY_API compute_next_timestep(parking_tariff_t *tariff, int cu
     case PaymentMethod::Steps:
         qCritical() << __LINE__ << "compute_next_timestep() paymentMethodId: Steps";
         break;
+    case PaymentMethod::Unified:
+        qCritical() << __LINE__ << "compute_next_timestep() paymentMethodId: Unified";
+        break;
     case PaymentMethod::Undefined:
         qCritical() << __LINE__ << "compute_next_timestep() paymentMethodId: Undefined";
         break;
@@ -528,6 +533,8 @@ int CALCULATE_LIBRARY_API compute_next_timestep(parking_tariff_t *tariff, int cu
     if ((paymentMethodId == PaymentMethod::Steps) ||
         // progressive tariff: e.g. Neuhauser, Kirchdorf (743)
         (paymentMethodId == PaymentMethod::Progressive) ||
+        // unified tariff: starting with Bad Neuenahr (249), Tariff for Zone5
+        (paymentMethodId == PaymentMethod::Unified) ||
         // degressive tariff: e.g. Fuchs Technik (500)
         (paymentMethodId == PaymentMethod::Degressive))
     {
@@ -960,6 +967,19 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
                     return calcState.set(CalcState::State::ABOVE_MAX_PARKING_TIME);
                 }
             }
+        } else
+        if (tariff->getPaymentOptions(0).pop_payment_method_id == PaymentMethod::Unified) {
+            std::pair<CalcState, std::optional<int>> p =
+                Calculator::GetInstance().ComputeCostFromDuration(tariff, start_parking_time, end_parking_time, netto_parking_time);
+            CalcState const cs = p.first;
+
+            if ((cs.getStatus() == CalcState::State::SUCCESS || cs.getStatus() == CalcState::State::SUCCESS_MAXPRICE)) {
+                if (p.second.has_value()) {
+                    cost = p.second.value();
+                }
+            } else {
+                return cs;
+            }
         } else {
             cost = Calculator::GetInstance().GetCostFromDuration(
                         tariff,