Tibet is known to be a tricky place for one to attain a Travel visa. It might be because of several rules and conditions to enter here. First of all, individual travelers are generally not allowed to travel around Tibet. You can readily join a group and that is not difficult. The second step is the visa process. Tibet is not expensive for travelers but you might have to submit your itinerary beforehand for a visa here. The time might be uneven and sometimes it might take extra days before you attain your visa. The cost might vary depending on your nationality and you can check it on several websites.
It is considered best to give the responsibility of Tibet travel permits to your tour operator due to all these reasons. We do suggest travelers have their documents, visa, and permits with them with a copy and if required show the officials unhesitatingly.