The study focuses on a business model that fully defines the approaches and methods of work of a commercial bank with corporate customers. The customer base of particular credit institutions changed considerably in 2022–2023, while the structure of the cumulative balance did not experience profound changes. Thus, PJSC JSCB Avangard’s focus on corporate services led to substantial changes in the liability structure, causing an outflow of funds from individuals. The authors analyzed the business model of Avangard in comparison with the activities of banks operating under the Tochka brand. The financial strategy of Avangard is to increase risk-free (transaction) income and liquid assets on the balance sheet while reducing the accepted credit risk. A special feature of the business model of Avangard is the fact that the majority shareholder takes an active part in resolving not only strategic but also major operational issues. Avangard is a member of a large financial group, which includes organizations in the agricultural, industrial, economic, and investment sectors and services their functioning, without placing much emphasis on attracting clients external to the group. According to the study, the business model of working with corporate customers of the classical bank PJSC JSCB Avangard has the main advantage of maintaining its traditionalism, while also being flexible in digital development, immediately adapting to the turbulence of the financial market, and developing its technological effectiveness. This model of a classic bank, focused on the quality of cash services, will be in demand among corporate customers in the coming years, and, perhaps, even more viable than the Tochka ecosystem models. The shortcomings of the business model of Avangard are the low level of involvement in the competition for servicing small and medium-sized businesses corporate segment, which is reflected in unfavorable tariffs, underdeveloped affiliate programs and digital areas of banking business, in comparison with the activities of Tinkoff Bank JSC, VTB Bank (PJSC), Alfa-Bank JSC and Sberbank PJSC.