The monetary unit in the Republic of Bulgaria is the lev (BGN), which is equal to 100 stotinki (st.). Since 1997, the country has been governed by a currency board and the value of the lev has been pegged to the Euro, at a fixed rate of 1 EUR – 1.95583 BGN.
You can find current currency information on the site of the Bulgarian National Bank: http://www.bnb.bg/
Currency can be exchanged in banks or in any of the country’s many currency exchange offices. Some of these exchange offices also work on holidays. Euro-cheques can be exchanged in banks.
Credit cards: Most Bulgarian hotels and stores now accept VISA, MasterCard, American Express, and Diners Club credit cards.