Your Bhutan visa will be processed once your tour operator makes the payment of the tour package cost to Tourism Council of Bhutan. The visa clearance number in the form of a letter will be released in as early as 3 days after applying and sent to your tour operator, the airport immigration terminal and specific road checkpoints and also to the airlines that you will be flying with. Usually it is about 1 to 2 weeks before your arrival in Bhutan that your visa clearance is sent to your agency. Based on this clearance number, you will have your visa stamped on your passport at your entry point in Bhutan.