The financial strategy of the company is one of the most important functional strategies that ensures the formation, efficient distribution and use of financial resources. Analysis and optimization of expenses, as a tool for implementing a financial strategy, allows you to reduce the cost of sales (services) and increase profit margins and, accordingly, increase the amount of financial resources for the development of the company. The article discusses the impact of cost optimization on the financial strategy of the organization and forecasting the main indicators of its activity using the example of the North-West Suburban Passenger Company (hereinafter referred to as JSC “SZPPK”), which carries out passenger rail transportation on the territory of St. Petersburg, in Leningrad, Novgorod, Pskov, Murmansk regions, as well as in the Republic of Karelia. To forecast the main indicators of the company’s activities, such as revenue, cost of sales (services), net profit, and the passenger turnover indicator was used in the article as a factor determining these indicators.