The maximum amount respondents are 'willing to pay (WTP)' for the benefits provided by Occupational Health Services is £300 per employee per year (median value). The minimum amount respondents are 'willing to accept (WTA)' as compensation for a withdrawal of Occupational Health Services is £400 per employee per year (median value). The aspect of Occupational Health Services valued most highly is the ability to enhance workplace safety. The aspect valued least is the possible impact on reducing medico-legal costs. Cost-benefit analysis shows that Occupational Health Services generates a positive value added range. Sensitivity analysis shows that willing to pay and willing to accept values would have to be considerably lower before the overall economic result is reversed.