The unit of currency is the Cape Verde escudo (CVE), divided into 100 centavos. Though not a hard currency, it's stable; in January 2002 it was pegged to the euro. Most businesses also accept euros.
Banks are found in all the main towns and even some of the smaller ones; most have ATMs that accept bankcards and Visa (daily withdrawal limit is CVE20,000).
Many banks change travellers cheques and cash in all the main currencies (except the West African CFA franc).
Credit cards are not widely accepted; Visa is the most widespread. Even where accepted, there's typically a 3% to 5% commission for credit card payments.