All citizens of India who are visiting Bhutan will be required to carry one of the two valid travel documents:
It should also be remembered that although citizens of India do not require a visa to visit Bhutan, citizens of India who are arriving in Bhutan by road will be required to obtain an Entry Permit. This will be issued by the Immigration Office of Royal Government of Bhutan, located in Phuentsholing, after the verification of travel documents. Phuentsholing is located on the Indo-Bhutan border opposite Jaigaon, West Bengal. Indians arriving in Bhutan by air should also possess any one of the travel documents mentioned above. The entry permit can be obtained at the Paro International Airport.
However, even after obtaining the entry permit, the Indian tourist will only be able to visit Thimphu and Paro. Any tourist going beyond that will have to obtain a Special Area Permit from the Royal Government of Bhutan Immigration Office located in Thimphu, on any working days, i.e. Monday to Friday.
Children below 18 years of age will have to carry their original birth certificate, if a passport is not available. They do not require a visa while visiting Bhutan.
Following are the quick important links to access all the essential information of Bhutan.