Bhutan's visa is different from other visas
Visa is one of the most important things to know before traveling to Bhutan. Actually, Bhutan visas operate differently than other visas. First and foremost, you must obtain a visa for each night spent in Bhutan. This is in contrast to most other countries, which allow you to pay a flat fee every two weeks, month, three months, or more. The daily visa fee is also fairly high. Peak season rates are US$250 per person per night (March to May and September to November). Off-peak season rates are US$200 per person per night. Because of the high visa fee, most visitors do not stay in the country for long.
One of the primary reasons for the high daily visa fee is that Bhutanese tourism policy prioritizes quality over quantity. They want only a few visitors at a time and to give those visitors an unforgettable experience. To put it another way, the Bhutanese government is eager to avoid the dangers of mass tourism. There is a yearly limit on the number of tourists who can enter the country.