This article examines the system of military payment in the early Islamic state (c. 650–900 A.D.) and its effect on the economy. It is argued that early Islamic armies were paid in cash salaries, rather than land grants or kind. This meant that a massive amount of coinage was put into circulation and spent by the soldiers in the markets of the developing towns of the Middle East. The system of military payment played an important part in creating the urban, cash based market economy of the early Islamic world which contrasts so sharply with the land and kind based economies of the contemporary Byzantine empire and Latin West.