No. Night supplements must be bought additionally (except in FRIMOBIL, where the night supplement are included into FAIRTIQ)
Generally all trains after 01h00 are subject to surcharge. However there are exceptions. Therefore it is important to check the indications on the vehicle or to check up the timetable. The vehicles that need a night supplement are indicated with RE, SN or N. In the online timetable the affected connections are marked with a "Z".
More at www.nachtzuschlag.ch.