Taxation is one of the elements of the companies' competitiveness. Along with the MEDEF and the GFI (Group of Industrial Federations), the UIC campaigns for tax relief and a thorough reform of the tax system crippling French companies. It resists the various obstacles to investments such as local tax on businesses, and encourages research and innovation policies.
 
Internally, the UIC contributes to the information of member companies on the implementation methods of the French and European taxation regulations. It sometimes represents the business to the fiscal authorities and the arbitration committees and such.