A taxation policy is one of the main instruments which can affect a range of national economy sectors and can support territorial development by special provisions in tax laws. Latvian current tax policy mainly continues the policy that follows after the tax reform of 1995. In general, the goal the tax system was to ensure capital inflow and capital market activities with the aim to increase foreign direct investment and to promote the development of national economy. The paper describes a mathematical model which can assist decision-making of policy makers and investors. The purpose of this article is to study the model which, based on the methodology of comparative economics, can allow supporting corporate tax policy decisions. So the study results in providing recommendation on the model and drawing consequent conclusions. The research is based on a comparative analysis of tax systems and academic literature.