The size of the cost to the Australian beef industry of a potential loss of major beef export markets following an outbreak of foot and mouth disease (FMD) in Australia is important in determining appropriate precautions. The size of this cost is evaluated with a dynamic bioeconomic model of Australian beef production, consumption and export trade. The model developed by ABARE represents forward-looking competitive behaviour of beef producers and traders on domestic and export markets based on perfect foresight. The model enables estimation of the cost due to a FMD outbreak under various scenarios regarding the duration of market closure and affected zones.