This report attempts to indentify, define, and classify the cost components of occupational injuries and to catalogue the various economic approaches used to estimate the related costs. It does not, however, attempt to catalogue the actual or estimated amounts of the costs of occupational injuries as found in the literature. The costs of occupational injuries can be grouped into three categories: direct costs, indirect costs, and human costs. There is no consensus regarding what each category comprises. Generally speaking, direct costs consist of components associated with the treatment and “repair” of the injury, such as medical costs. Direct cost data are usually quite easy to obtain and do not require the use of special estimation methods. Indirect costs are considered to be costs related to the lost opportunities for the injured employee, the employer, the co-workers, and the community. They consist mainly of salary costs, administrative costs, and productivity losses.