Tax burden is one of the concepts used to assess the impact of tax payments on the financial condition of an enterprise. The amount of the tax burden depends on many factors - the type of activity and the form of its implementation, the tax regime, the organizational and legal form of the enterprise and the features of tax and accounting established in the accounting policy. The proposed methodology allows each enterprise to calculate its tax burden, analyze its state over a number of years, and then make a forecast of possible options for changing the tax burden, achieving its optimal value.