The fiscal extensions could be a useful tool to develop the economy sector, allow to reach important achievements in unemployment, production, tourism, and other variables on a certain population. In return, the state stops perceiving an important of tax resources, this loss of receipts is the tax expenditure. Tax incentives has become into an economic study subject, due to, they allow to the state to find the develop in specific sectors. An incentive policy is cost-effective when the benefits (economic, social, environmental) overcome the fiscal cost and the effects on efficiency, equity and transparency that it generates. In Colombia, the exemptions are modified in every tax reform, each presidential government decide whether to expand or reduce them, depending on the available budget and the policies they intend to advance. This reason why, exemptions have become a topic of study that is more political than economic.
