In Bhutan, $50 and $100 is given better exchange rate, and for $20 or less, you get 5% less value. Also, keep in mind that Bhutan has no coins, so expect only cash. It is recommended you exchange your cash at the airport in Paro, although you can also exchange in Bank of Bhutan branches available only in the major towns like Thimphu and Paro. It would be easy if you take Traveler'scheque and most of the banks accept US dollars on your trip to Bhutan as both
Master Card, Visa, and American Express are accepted, but in most of the parts of Bhutan, ATM’s and banking facilities are not available. Only a few hotels in some of the places have credit card facility so carrying local currency is recommended.