Abstract. The Strategy of the European Association of National Metrology Institutes (EURAMET) defines the key directions for the development of regional and national metrology systems, taking into account current trends in the development of science, technology and needs of society and economies. The Strategy notes that due to the complexity and large scale of tasks their solutions is possible only by uniting the efforts of a number of countries and with regard to cost optimisation. In recent years, economic criteria hold an important place among the choice criteria for optimal ways for development of national metrology systems of member countries of Euro-Asian Cooperation of National Metrological Institutions (COOMET). There is a growing interest in research and development of methods for quantitate assessment of the economic feasibility of a particular options of implementation of the general strategy with regard to the primary measurement standards of the units of physical quantities at national, regional and international levels. This paper substantiates methodology and presents new algorithms for the evaluation of economic feasibility and cost optimisation for financing metrological activity, such as, for making a decision on the creation or improvement of the national primary measurement standards.