Gibraltar uses the Gibraltar pound (GIP), pegged one-to-one to the British pound (GBP). British notes circulate normally; Gibraltar notes are not always accepted back in the UK or Spain.
Euros are widely accepted on Main Street, in shops and most restaurants, but exchange rates at the till are rarely as good as paying in pounds or by card.
Cards are accepted almost everywhere — contactless works on small purchases, and most pubs, cafés and museums take Visa and Mastercard without a minimum amount.
ATMs are easy to find around Casemates Square and Main Street. Withdrawing pounds is usually cheaper than changing cash at a bureau de change.