Budget hotel rooms in Hanoi begin around $15; at around the $25 price point, the comfort level increases noticeably. Aside from the occasional boutique hotel or spa, accommodation in the countryside is generally cheaper. ATMs—many in international banks—are easy to find throughout Hanoi. U.S. dollars are the preferred currency of exchange, but other major currencies are easy to change at banks, exchange kiosks, and hotels.
Vendors or small businesses in the countryside surrounding Hanoi will frequently not have change for a 500,000 dong note (the common denomination issued at ATMs). Make sure you have plenty of small change on hand. Credit card transactions often involve additional surcharges, usually around three percent.