diff --git a/library/include/mobilisis/tariff_carryover.h b/library/include/mobilisis/tariff_carryover.h
index 034fd63..72e80bd 100644
--- a/library/include/mobilisis/tariff_carryover.h
+++ b/library/include/mobilisis/tariff_carryover.h
@@ -3,6 +3,80 @@
 
 #include <QTime>
 
+#include "time_range.h"
+
+enum class ApplyCarryOver {
+    NEVER = 0,
+    MATCH_PREV_DAY = 1,
+    MATCH_NEXT_DAY = 2,
+    ALWAYS = 3
+};
+
+struct ATBTariffCarryOver {
+    int m_id;
+    QString m_weekDay;
+    TimeRange m_range;
+    QDate m_date;
+    ApplyCarryOver m_carryOverIf;
+
+    explicit ATBTariffCarryOver()
+      : m_id(-1)
+      , m_carryOverIf(ApplyCarryOver::NEVER) {
+    }
+
+    void setCarryOverIf(QString const &coif) {
+        if (coif == "never") {
+            m_carryOverIf = ApplyCarryOver::NEVER;
+        } else
+        if (coif == "match_prev_day") {
+            m_carryOverIf = ApplyCarryOver::MATCH_PREV_DAY;
+        } else
+        if (coif == "match_next_day") {
+            m_carryOverIf = ApplyCarryOver::MATCH_NEXT_DAY;
+        } else
+        if (coif == "always") {
+            m_carryOverIf = ApplyCarryOver::ALWAYS;
+        } else {
+           qCritical() << "ERROR unknown carry over application" << coif;
+        }
+    }
+
+    ApplyCarryOver carryOverIf() const {
+        return m_carryOverIf;
+    }
+
+    QString carryOverIfStr() const {
+        if (m_carryOverIf == ApplyCarryOver::NEVER) {
+            return "never";
+        }
+        if (m_carryOverIf == ApplyCarryOver::ALWAYS) {
+            return "always";
+        }
+        if (m_carryOverIf == ApplyCarryOver::MATCH_PREV_DAY) {
+            return "match prev day";
+        }
+        if (m_carryOverIf == ApplyCarryOver::MATCH_NEXT_DAY) {
+            return "match next day";
+        }
+        return QString("ERROR unknown carry over application: %1").arg(static_cast<int>(m_carryOverIf));
+    }
+
+    friend QDebug operator<<(QDebug debug, ATBTariffCarryOver const &co) {
+        QDebugStateSaver saver(debug);
+
+        debug.nospace()
+            << "\nTariffCarryOver:\n"
+            << "         week day: " << co.m_weekDay << "\n"
+            << "             date: " << co.m_date.toString(Qt::ISODate) << "\n"
+            << "               id: " << co.m_id << "\n"
+            << "            start: " << co.m_range.m_start << "\n"
+            << "              end: " << co.m_range.m_end << "\n"
+            << "         duration: " << co.m_range.m_duration << "\n"
+            << "    carry over if: " << co.carryOverIfStr() << endl;
+        return debug;
+    }
+};
+
 struct ATBCarryOver {
     struct week {
         int day;