Ivan Christoforovich studied at a two-year folk school and showed such abilities there that teachers strongly advised and helped his mother arrange Ivan at the Chukhloma city school, and then he studied at the Kostroma gymnasium for a Susanin scholarship (1881-1889).
After graduating from high school with a gold medal, he entered the law faculty of Moscow University. Under the leadership of professor I.I. Yanzhula engaged in economic sciences. After graduating from Moscow University with a diploma of the 1st degree, he was appointed in November 1893 as a junior candidate for judicial positions in the Moscow Court of Justice and from January 1894 left at the Department of Financial Law to prepare for a professorship.
From March 1895 - privat-docent of Moscow University. In January 1896 he was sent on a scientific mission to Europe. In (Germany), England, France and Switzerland, Ivan Christoforovich collected materials about the features of the development of tax systems and the basic principles of financial law, customs policy, the relationship of entrepreneurs and wage workers, the evolution of cooperation and so on.
In 1898 Ivan Christoforovich received a master's degree for his thesis "Income tax in England and the economic and social conditions of its existence". In February 1900 he defended his doctoral thesis "The main trends in the development of direct taxation in Germany in connection with economic and social conditions" and was appointed first extraordinary (1901), and since March 1903 - ordinary professor of the department of financial law of Moscow University. In 1901, he took part in the activities of the Moscow Society of Mutual Assistance of Mechanical Production Workers, created on the initiative of S. V. Zubatov. He organized popular lectures for workers in the Historical Museum in Moscow and drafted a charter for the Society.
In the summer of 1907, Ivan Christoforovich was transferred to St. Petersburg University, while remaining at the same time a lecturer at Moscow University. He also taught at the Bestuzhev women's courses and at the highest women's courses of N. P. Raev in St. Petersburg, as well as at the Pedagogical Academy.
In July 1911, he was again appointed an ordinary professor at Moscow University and headed the department of financial law until April 1917. At the same time, he was from October 1912 a supernumerary ordinary professor at the Moscow Commercial Institute, taught finance and a history of economic life and economics at the A. L. Shanyavsky Moscow city National University. Since 1914 - member of the legal test committee at Moscow University. Since 1909 - elected member of the State Council of the Academy of Sciences and universities.
From January 1, 1914 - State Councilor. In April 1917 he resigned from Moscow University. After the revolutionary year of 1917, the Ozerov, unlike many Russian bankers and entrepreneurs, did not follow in emigration and stayed in Russia, where he continued his scientific activities, in particular, he developed the concept of creating an agricultural bank, studied the financial problems of domestic and foreign trade, and studied the scientific organization of labor.
In 1918, Ivan Christoforovich became the economic adviser to Hetman Skoropadsky in Ukraine. In 1919 he returned to Moscow. Lectured at the Industrial Institute. He served at the Institute for Environmental Research (since 1919), collaborated with the Financial and Economic Institute of the People's Commissariat of Finance. He taught at the Faculty of Social Sciences of Moscow State University (1920/1921). Cooperating with the Economist magazine of the industrial and economic department of the Russian Technical Society, he proposed effective, in his view, ways to get the country out of the chaos. In 1919-1921 he taught at the MFEU, taught the course "Fundamentals of Financial Science".
In 1922, the possibility of expelling Ozerov on a "philosophical ships" was considered, but in the end the scientist was recognized as not dangerous. In 1927 he retired. Ivan Christoforovich was arrested on January 28, 1930 and sentenced to capital punishment with the replacement of 10 years in prison. The whole of 1930 was in the Butyrka prison, then he served his sentence on Solovki and on the White Sea-Baltic Canal. In 1933, he was amnestied and he went to Voronezh, where his wife was exile. By a decree of the Central Executive Committee of the USSR of June 19, 1935, his conviction was lifted and in 1936 he and his wife were settled in the Nursing House of Scientists in Leningrad. There Ozerov and died during the blockade of Leningrad. According to the conclusion of the USSR Prosecutor's office of January 21, 1991, it was fully rehabilitated.
Quotations: "I, as the son of the working people, wanted to be useful, and, being raised at the expense of the people, climbing up through his shoulders, I wanted to be useful in spreading knowledge among him and awakening in him energy and creativity in economic life."
Ivan Christoforovich Ozerov walked in the same clothes for years, did not chic in restaurants, traveled in second grade. However, this did not prevent him from giving in to various temptations: “he did not mind, in his words,“ drink and take a walk with ballerinas, ”he tried drugs, wrote screenplays for A. A. Khanzhonkov".