The article is dedicated to developing an economically constructive technique for assessing the cost range of intellectual property. Today, possession of intellectual property represents a competitive advantage which directly impacts the market positions of the enterprise. The same as with assessment of traditional assets, the result of adequate assessment of intellectual property is obtaining the planned profit, and substantial mistakes can result in bankruptcy of the enterprise. For this reason, intellectual property cost estimation is an important and relevant economic task that has to be solved. The goal of the study consists in developing an economically constructive technique for estimating the cost range of intellectual property. Methods of the study include competitive analysis, forecasting methods, dynamic methods of assessment of economic efficiency, pattern recognition theory. The objective of the study consists in determining the functionality of the interdependence between the cost range of intellectual property and the volume of external investments at the given levels of profitability for the external investor and the enterprise integrating the intellectual property. The object of assessment is intellectual property. The subject of assessment is a set of the economic and legal relations and technological conditions determining the cost throughout the full life cycle of intellectual property and dynamics of change of its size and structure. The technique is intended for carrying out objective assessment of the cost range of intellectual property in relation to the main stages of its life cycle. The developed technique can be applied at any enterprises which are creating, possessing, purchasing or using intellectual property. We have formulated the problem statement for the relevant economic task, formalizing it in order to carry out quantitative estimation. The developed technique for estimating the cost range of intellectual property has been discussed in detail; the known ways of cost estimation are particular cases of this technique with lesser accuracy and reliability of results. The technique allows to investigate the patterns in the relationship between the degree of innovativeness of intellectual property and the required level of investments. Much attention is given to the procedure for determining the function of decrease in innovativeness of intellectual property, which is based on objective data of the state intellectual property registration authorities. We have defined and substantiated the formula for calculating the innovativeness coefficient. The article is concluded with the method for calculating the volume of predicted revenue in implementing intellectual property and the required level of external investments that allows to estimate the intellectual property range of cost for any moment of life cycle, detailing the price structure.