The article is devoted to the actual problem of financial support for the development of innovations. The purpose of the study is to estimate the share of innovation financing costs in the income received by organizations from the sale of manufactured goods, works and services for innovative organizations located in each of the regions of Russia. As the initial information, the study used official statistics for 2017-2019, which characterize the costs of financing innovations by organizations located in 82 regions of Russia. In the course of the study, economic and mathematical models were developed that represent the functions of the normal distribution. It is proved that there were no significant changes in the value of the share of innovation financing costs in the amount of income received from the sale of manufactured products by organizations located in the regions in 2017-2019. It is shown that the costs of financing innovations for organizations account for a small share in the amount of income received from the sale of manufactured products. It is shown that the values of the specific weights of innovation financing costs were significantly differentiated by region. The results obtained are new and original. The methodological approach presented in the article to estimate the share of innovation financing costs in the amount of revenue received from sales of manufactured products by organizations located in the regions can be used in further research. The proposed tools can be used to monitor the costs of financing innovation activities in organizations. The results of the work can be applied in the current activities of state structures and public organizations, when justifying measures for the development of innovative activities.