Qatar Airways provides passengers with accommodation, meals and ground transportation if their scheduled connection time in Doha is more than 8 hours but less than 24 hours. However, this facility is applicable only on certain itineraries or routes. For more information contact your local Qatar Airways office or travel agent.
For itineraries or routes that are not eligible for free accommodation, meals or ground transportation, passengers may opt to pay additional charges. The following charges will apply:
* Economy class passengers - $125 per person
* First and Business Class passengers - $150 per person which includes Al-Maha meet and greet service
Long Stopovers must be pre-booked 72 hours prior to arrival in Doha.
If you have access to the rules for your award ticket it will tell you fairly clearly whether you qualify for STPC. But the easiest thing to do is to contact your local QR office and just ask them.
I have a paid trip in QR business class coming up later this year. JFK-DOH-BKK that qualifies on the inbound for STPC. According to the local QR office I have to submit a form in advance of that flight (I think it has to be at least 72 hours in advance but not more than 30 days) with a bunch of information and they will arrange the hotel and transport.