Capacity of Tax in Iran

In this article, based on the level of levy in the country during 1379 to 1390 was attempted to divide the country into three regions, called them developed, less developed and underdeveloped each of these areas, include provinces, which are selected according to available data, there has thus developed region includes nine provinces, less developed and underdeveloped regions, each consisting of six provinces, and the other provinces have been removed. Also, using panel data to identify the factors affecting the tax capacity of the various provinces and it was found that the value added of industry and mines of GDP, the share of value added services sector in GDP, Per capita income and the investment are meaningful variables. At last by using maximum calculated taxation through curved Lafer general form and compare it with the actual capacity of each province's tax The amount of any State tax gap has been calculated that in order for a developed region is 41%, The less developed regions and underdeveloped region which is 47%, The results of this study suggest that the tax gap is present in all regions and provinces, and even increased. Therefore, it is proposed to compensate for the: A – tax Culture. B- General tax plan and instruction on-the-job. C- Correction of rules and tax circular and D- other essential preparation and important enterprises will do.