The dollar is the basic unit of American currency. It is divided into 100 cents. The most common bills are $1, $5, $10, $20, $50 and $100. Commonly used coins are the penny (1 cent), nickel (5 cents), dime (10 cents) and quarter (25 cents). Foreign currency is not accepted.
You can exchange currency at most major airports, banks, at private exchange offices such as American Express or Thomas Cook, and at some hotels. Foreign currency exchange offices at international airports are usually open until the last international flight comes in, Monday through Saturday. Most banks are open Monday to Friday from 9 a.m. to 4 p.m., and some are open on Saturday mornings.
Traveler’s checks remain the safest way to travel with large amounts of money and they are accepted at most locations. Credit cards are widely accepted by hotels, shops, restaurants and car hire companies. Be aware that sales tax (usually 6 to 7 percent) will be added to most prices at shops, restaurants and attractions.