The gambling industry goes from a national matter towards an international market. Since more and more members of EU does liberalise the gambling reforms and introduces a license system more participants will get an EU license for online gambling. With an EU license it is difficult for members of the EU to refuse a company to offer a gambling supply on the Internet if they don’t have an open license system. This paper tries to acknowledge the problem regarding the monopoly Sweden has today and calculate the effect if Sweden would move to a license system regarding online gambling by doing a cost benefit analysis. Unfortunately the result from the cost benefit analysis was that more research is needed in the area to make a correct conclusion. If the effect from public health regarding compulsive gambling is ignored the conclusion is that a license system is gainful.