Holey dollar is the name given to coins used in the early history of two British settlements: Prince Edward Island and New South Wales. The middle was punched out of Spanish dollars, creating two parts: a small coin, known as a "dump" in Australia, and a "holey dollar". This was one of the first coins struck in Australia.

The Spanish dollar, also known as the piece of eight, is a silver coin of approximately 38 mm (1.5 in) diameter worth eight Spanish reales. It was minted in the Spanish Empire following a monetary reform in 1497 with content 25.563 g (0.8219 ozt) fine silver. It was widely used as the first international currency because of its uniformity in standard and milling characteristics. Some countries countermarked the Spanish dollar so it could be used as their local currency.